Add API for getting applications

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/ApplicationList.java

@@ -19,6 +19,7 @@
 package org.wso2.carbon.device.application.mgt.common;
 
 import org.wso2.carbon.device.application.mgt.common.dto.ApplicationDTO;
+import org.wso2.carbon.device.application.mgt.common.response.Application;
 
 import java.util.List;
 
@@ -27,15 +28,15 @@ import java.util.List;
  */
 public class ApplicationList {
 
-    private List<ApplicationDTO> applications;
+    private List<Application> applications;
 
     private Pagination pagination;
 
-    public List<ApplicationDTO> getApplications() {
+    public List<Application> getApplications() {
         return applications;
     }
 
-    public void setApplications(List<ApplicationDTO> applications) {
+    public void setApplications(List<Application> applications) {
         this.applications = applications;
     }
 

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/Filter.java

@@ -18,25 +18,68 @@
  */
 package org.wso2.carbon.device.application.mgt.common;
 
+import java.util.List;
+
 /**
  * Filter represents a criteria that can be used for searching applications.
  */
 public class Filter {
 
-    /**
-     * Name of the application
+    /***
+     * Supported device type for the application.
+     * e.g :- Android, iOS, Windows
+     */
+    private String deviceType;
+
+    /***
+     * Name of the application.
      */
     private String appName;
 
-    /**
-     * Type of the application
+    /***
+     * Type of the application.
+     * e.g :- ENTERPRISE, PUBLIC
      */
     private String appType;
 
+    /***
+     * Subscription type of the application.
+     * e.g :- FREE, PAID etc
+     */
+    private String subscriptionType;
+
+    /***
+     * Minimum rating of the application.
+     * e.g :- 4,5
+     */
+    private int minimumRating;
+
+    /***
+     * Application release version.
+     */
+    private String version;
+
+    /***
+     * Release type of the application release.
+     *  e.g :- Alpha, Beta
+     */
+    private String appReleaseType;
+
+    /**
+     * Category list of the application
+     */
+    private List<String> appCategories;
+
     /**
-     * Category of the application
+     * Tag list of the application
+     */
+    private List<String> tags;
+
+    /***
+     * Unrestricted role list. Visibility of the application can restricted through user roles and users can view the
+     * application who has at least one role in unrestricted role list
      */
-    private String appCategory;
+    private List<String> unrestrictedRoles;
 
     /**
      * Checking the application name matches fully with given name
@@ -59,14 +102,10 @@ public class Filter {
     private String sortBy;
 
     /**
-     * Set as True if required to have only published application release, otherwise set to False
+     * Current application release state.
+     * e.g :- CREATED. IN_REVIEW, PUBLISHED etc
      */
-    private String currentAppReleaseState;
-
-    /***
-     * Supported device type for the application. i.e Android, iOS, Windows etc
-     */
-    private int deviceTypeId;
+    private String appReleaseState;
 
     public int getLimit() {
         return limit;
@@ -116,21 +155,43 @@ public class Filter {
         this.appType = appType;
     }
 
-    public String getAppCategory() {
-        return appCategory;
+    public List<String> getAppCategories() {
+        return appCategories;
     }
 
-    public void setAppCategory(String appCategory) {
-        this.appCategory = appCategory;
+    public void setAppCategories(List<String> appCategories) {
+        this.appCategories = appCategories;
     }
 
-    public String getCurrentAppReleaseState() { return currentAppReleaseState; }
+    public List<String> getTags() { return tags; }
 
-    public void setCurrentAppReleaseState(String currentAppReleaseState) {
-        this.currentAppReleaseState = currentAppReleaseState;
-    }
+    public void setTags(List<String> tags) { this.tags = tags; }
+
+    public List<String> getUnrestrictedRoles() { return unrestrictedRoles; }
+
+    public void setUnrestrictedRoles(List<String> unrestrictedRoles) { this.unrestrictedRoles = unrestrictedRoles; }
+
+    public String getAppReleaseState() { return appReleaseState; }
+
+    public void setAppReleaseState(String appReleaseState) { this.appReleaseState = appReleaseState; }
+
+    public String getDeviceType() { return deviceType; }
+
+    public void setDeviceType(String deviceType) { this.deviceType = deviceType; }
+
+    public String getSubscriptionType() { return subscriptionType; }
+
+    public void setSubscriptionType(String subscriptionType) { this.subscriptionType = subscriptionType; }
+
+    public int getMinimumRating() { return minimumRating; }
+
+    public void setMinimumRating(int minimumRating) { this.minimumRating = minimumRating; }
+
+    public String getVersion() { return version; }
+
+    public void setVersion(String version) { this.version = version; }
 
-    public int getDeviceTypeId() { return deviceTypeId; }
+    public String getAppReleaseType() { return appReleaseType; }
 
-    public void setDeviceTypeId(int deviceTypeId) { this.deviceTypeId = deviceTypeId; }
+    public void setAppReleaseType(String appReleaseType) { this.appReleaseType = appReleaseType; }
 }

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/config/RatingConfiguration.java

@@ -0,0 +1,42 @@
+package org.wso2.carbon.device.application.mgt.common.config;/* Copyright (c) 2019, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
+ *
+ * Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import javax.xml.bind.annotation.XmlElement;
+
+public class RatingConfiguration {
+
+    private int minRatingValue;
+    private int maxRatingValue;
+
+    @XmlElement(name = "MinRatingValue")
+    public int getMinRatingValue() {
+        return minRatingValue;
+    }
+
+    public void setMinRatingValue(int minRatingValue) {
+        this.minRatingValue = minRatingValue;
+    }
+
+    @XmlElement(name = "MaxRatingValue")
+    public int getMaxRatingValue() {
+        return maxRatingValue;
+    }
+
+    public void setMaxRatingValue(int maxRatingValue) {
+        this.maxRatingValue = maxRatingValue;
+    }
+}

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/services/ApplicationManager.java

@@ -83,7 +83,7 @@ public interface ApplicationManager {
      * @return Applications that matches the given filter criteria.
      * @throws ApplicationManagementException ApplicationDTO Management Exception
      */
-    ApplicationList getApplications(Filter filter, String deviceTypeName) throws ApplicationManagementException;
+    ApplicationList getApplications(Filter filter) throws ApplicationManagementException;
 
     /**
      * To get the ApplicationDTO for given Id.

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/config/Configuration.java

@@ -18,6 +18,7 @@
  */
 package org.wso2.carbon.device.application.mgt.core.config;
 
+import org.wso2.carbon.device.application.mgt.common.config.RatingConfiguration;
 import org.wso2.carbon.device.application.mgt.common.config.UIConfiguration;
 import org.wso2.carbon.device.application.mgt.core.lifecycle.config.LifecycleState;
 
@@ -48,6 +49,8 @@ public class Configuration {
 
     private String artifactDownloadEndpoint;
 
+    private RatingConfiguration ratingConfiguration;
+
     @XmlElement(name = "DatasourceName", required = true)
     public String getDatasourceName() {
         return datasourceName;
@@ -82,15 +85,21 @@ public class Configuration {
         this.lifecycleStates = lifecycleStates;
     }
 
+    @XmlElement(name = "UIConfigs")
     public UIConfiguration getUiConfiguration() {
         return uiConfiguration;
     }
 
-    @XmlElement(name = "UIConfigs")
     public void setUiConfiguration(UIConfiguration uiConfiguration) {
         this.uiConfiguration = uiConfiguration;
     }
 
+    @XmlElement(name = "RatingConfig")
+    public RatingConfiguration getRatingConfiguration() { return ratingConfiguration; }
+
+    public void setRatingConfiguration(
+            RatingConfiguration ratingConfiguration) { this.ratingConfiguration = ratingConfiguration; }
+
     @XmlElement(name = "ArtifactDownloadEndpoint", required = true)
     public String getArtifactDownloadEndpoint() {
         return artifactDownloadEndpoint;

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/ApplicationDAO.java

@@ -54,6 +54,11 @@ public interface ApplicationDAO {
 
     void addTagMapping (List<Integer>  tagIds, int applicationId, int tenantId) throws ApplicationManagementDAOException;
 
+    List<String> getAppTags(int appId, int tenantId) throws ApplicationManagementDAOException;
+
+    List<String> getAppCategories (int appId, int tenantId) throws ApplicationManagementDAOException;
+
+
 
     List<CategoryDTO> getAllCategories(int tenantId) throws ApplicationManagementDAOException;
 
@@ -76,11 +81,12 @@ public interface ApplicationDAO {
      * To get the applications that satisfy the given criteria.
      *
      * @param filter   Filter criteria.
+     * @param deviceTypeId ID of the device type
      * @param tenantId Id of the tenant.
      * @return ApplicationDTO list
      * @throws ApplicationManagementDAOException ApplicationDTO Management DAO Exception.
      */
-    ApplicationList getApplications(Filter filter, int tenantId) throws ApplicationManagementDAOException;
+    List<ApplicationDTO> getApplications(Filter filter, int deviceTypeId, int tenantId) throws ApplicationManagementDAOException;
 
     /**
      * To get the UUID of latest app release that satisfy the given criteria.

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/common/Util.java

@@ -74,7 +74,7 @@ public class Util {
 //                application.setId(applicationId);
 //                application.setName(rs.getString("APP_NAME"));
 //                application.setType(rs.getString("APP_TYPE"));
-//                application.setAppCategory(rs.getString("APP_CATEGORY"));
+//                application.setAppCategories(rs.getString("APP_CATEGORY"));
 //                application.setSubType(rs.getString("SUB_TYPE"));
 //                application.setPaymentCurrency(rs.getString("CURRENCY"));
 //                application.setIsRestricted(rs.getBoolean("RESTRICTED"));
@@ -139,33 +139,45 @@ public class Util {
                 application.setStatus(rs.getString("APP_STATUS"));
                 application.setAppRating(rs.getInt("APP_RATING"));
                 application.setDeviceTypeId(rs.getInt("APP_DEVICE_TYPE_ID"));
+                application.getApplicationReleases().add(loadAppRelease(rs));
             } else {
+                if (application != null && application.getApplicationReleases() != null) {
+                    application.getApplicationReleases().add(loadAppRelease(rs));
+                }
+            }
+            hasNext = rs.next();
+            if (!hasNext) {
+                applications.add(application);
+            }
+        }
+        return applications;
+    }
+
+    /**
+     * Populates {@link ApplicationReleaseDTO} object with the result obtained from the database.
+     *
+     * @param rs {@link ResultSet} from obtained from the database
+     * @return {@link ApplicationReleaseDTO} object populated with the data
+     * @throws SQLException If unable to populate {@link ApplicationReleaseDTO} object with the data
+     */
+    public static ApplicationReleaseDTO loadAppRelease(ResultSet rs) throws SQLException {
         ApplicationReleaseDTO appRelease = new ApplicationReleaseDTO();
         appRelease.setDescription(rs.getString("RELEASE_DESCRIPTION"));
         appRelease.setUuid(rs.getString("RELEASE_UUID"));
         appRelease.setReleaseType(rs.getString("RELEASE_TYPE"));
         appRelease.setVersion(rs.getString("RELEASE_VERSION"));
         appRelease.setInstallerName(rs.getString("AP_RELEASE_STORED_LOC"));
-                appRelease.setBannerName(rs.getString("RELEASE_BANNER_LOC"));
-                appRelease.setScreenshotName1("RELEASE_SC1");
-                appRelease.setScreenshotName2("RELEASE_SC2");
-                appRelease.setScreenshotName3("RELEASE_SC3");
-                appRelease.setPrice(rs.getDouble(" RELEASE_PRICE"));
+        appRelease.setBannerName(rs.getString("AP_RELEASE_BANNER_LOC"));
+        appRelease.setScreenshotName1("AP_RELEASE_SC1");
+        appRelease.setScreenshotName2("AP_RELEASE_SC2");
+        appRelease.setScreenshotName3("AP_RELEASE_SC3");
+        appRelease.setPrice(rs.getDouble("RELEASE_PRICE"));
         appRelease.setMetaData(rs.getString("RELEASE_META_INFO"));
         appRelease.setSupportedOsVersions(rs.getString("RELEASE_SUP_OS_VERSIONS"));
         appRelease.setRating(rs.getDouble("RELEASE_RATING"));
         appRelease.setCurrentState(rs.getString("RELEASE_CURRENT_STATE"));
         appRelease.setRatedUsers(rs.getInt("RATED_USER_COUNT"));
-                if (application != null && application.getApplicationReleases() != null) {
-                    application.getApplicationReleases().add(appRelease);
-                }
-            }
-            hasNext = rs.next();
-            if (!hasNext) {
-                applications.add(application);
-            }
-        }
-        return applications;
+        return appRelease;
     }
 
 

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/application/GenericApplicationDAOImpl.java

@@ -18,6 +18,7 @@
  */
 package org.wso2.carbon.device.application.mgt.core.dao.impl.application;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.json.JSONException;
@@ -124,119 +125,8 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
         }
     }
 
-//    @Override
-//    public ApplicationList getApplications(Filter filter, int tenantId) throws ApplicationManagementDAOException {
-//        if (log.isDebugEnabled()) {
-//            log.debug("Getting application data from the database");
-//            log.debug(String.format("Filter: limit=%s, offset=%s", filter.getLimit(), filter.getOffset()));
-//        }
-//        int paramIndex = 1;
-//        Connection conn;
-//        PreparedStatement stmt = null;
-//        ResultSet rs = null;
-//        ApplicationList applicationList = new ApplicationList();
-//        Pagination pagination = new Pagination();
-//        String sql = "SELECT "
-//                + "AP_APP.ID AS APP_ID,"
-//                + " AP_APP.NAME AS APP_NAME,"
-//                + " AP_APP.TYPE AS APP_TYPE,"
-//                + " AP_APP.APP_CATEGORY AS APP_CATEGORY,"
-//                + " AP_APP.SUB_TYPE AS SUB_TYPE,"
-//                + " AP_APP.CURRENCY AS CURRENCY, "
-//                + "AP_APP.RESTRICTED AS RESTRICTED,"
-//                + " AP_APP_TAG.TAG AS APP_TAG,"
-//                + " AP_UNRESTRICTED_ROLE.ROLE AS ROLE "
-//                + "FROM ((AP_APP LEFT JOIN AP_APP_TAG ON AP_APP.ID = AP_APP_TAG.AP_APP_ID) "
-//                + "LEFT JOIN AP_UNRESTRICTED_ROLE ON AP_APP.ID = AP_UNRESTRICTED_ROLE.AP_APP_ID) "
-//                + "WHERE AP_APP.TENANT_ID =  ?";
-//
-//
-//        if (filter == null) {
-//            throw new ApplicationManagementDAOException("Filter need to be instantiated");
-//        }
-//        if (filter.getAppType() != null && !filter.getAppType().isEmpty()) {
-//            sql += " AND AP_APP.TYPE ";
-//            sql += "= ?";
-//        }
-//        if (filter.getAppCategory() != null && !filter.getAppCategory().isEmpty()) {
-//            sql += " AND AP_APP.APP_CATEGORY ";
-//            sql += "= ?";
-//        }
-//        if (filter.getAppName() != null && !filter.getAppName().isEmpty()) {
-//            sql += " AND LOWER (AP_APP.NAME) ";
-//            if (filter.isFullMatch()) {
-//                sql += "= ?";
-//            } else {
-//                sql += "LIKE ?";
-//            }
-//        }
-//        if (filter.getDeviceTypeName() != null ) {
-//            sql += " AND AP_APP.DEVICE_TYPE_ID ";
-//            sql += "= ?";
-//        }
-//
-//        String defaultSortOrder = "ASC";
-//        if (filter.getSortBy() != null && !filter.getSortBy().isEmpty()) {
-//            defaultSortOrder = filter.getSortBy();
-//        }
-//        sql += " ORDER BY APP_ID " + defaultSortOrder +" LIMIT ? OFFSET ? ";
-//
-//        pagination.setLimit(filter.getLimit());
-//        pagination.setOffset(filter.getOffset());
-//
-//        try {
-//            conn = this.getDBConnection();
-//            stmt = conn.prepareStatement(sql);
-//            stmt.setInt(paramIndex++, tenantId);
-//
-//            if (filter.getAppType() != null && !filter.getAppType().isEmpty()) {
-//                stmt.setString(paramIndex++, filter.getAppType());
-//            }
-//            if (filter.getAppCategory() != null && !filter.getAppCategory().isEmpty()) {
-//                stmt.setString(paramIndex++, filter.getAppCategory());
-//            }
-//            if (filter.getAppName() != null && !filter.getAppName().isEmpty()) {
-//                if (filter.isFullMatch()) {
-//                    stmt.setString(paramIndex++, filter.getAppName().toLowerCase());
-//                } else {
-//                    stmt.setString(paramIndex++, "%" + filter.getAppName().toLowerCase() + "%");
-//                }
-//            }
-//            if (filter.getDeviceTypeName() != null ) {
-//                stmt.setInt(paramIndex++, filter.getDeviceTypeName().getId());
-//            }
-//
-//
-//            if (filter.getLimit() == 0) {
-//                stmt.setInt(paramIndex++, 100);
-//            } else {
-//                stmt.setInt(paramIndex++, filter.getLimit());
-//            }
-//            stmt.setInt(paramIndex, filter.getOffset());
-//            rs = stmt.executeQuery();
-//            applicationList.setApplications(Util.loadApplications(rs));
-//            applicationList.setPagination(pagination);
-//            applicationList.getPagination().setSize(filter.getOffset());
-//            applicationList.getPagination().setCount(applicationList.getApplications().size());
-//
-//        } catch (SQLException e) {
-//            throw new ApplicationManagementDAOException("Error occurred while getting application list for the tenant"
-//                                                                + " " + tenantId + ". While executing " + sql, e);
-//        } catch (DBConnectionException e) {
-//            throw new ApplicationManagementDAOException("Error occurred while obtaining the DB connection while "
-//                                                                + "getting application list for the tenant " + tenantId,
-//                                                        e);
-//        } catch (JSONException e) {
-//            throw new ApplicationManagementDAOException("Error occurred while parsing JSON ", e);
-//        } finally {
-//            Util.cleanupResources(stmt, rs);
-//        }
-//        return applicationList;
-//    }
-
-
     @Override
-    public ApplicationList getApplications(Filter filter, int tenantId) throws ApplicationManagementDAOException {
+    public List<ApplicationDTO> getApplications(Filter filter,int deviceTypeId, int tenantId) throws ApplicationManagementDAOException {
         if (log.isDebugEnabled()) {
             log.debug("Getting application data from the database");
             log.debug(String.format("Filter: limit=%s, offset=%s", filter.getLimit(), filter.getOffset()));
@@ -245,8 +135,6 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
         Connection conn;
         PreparedStatement stmt = null;
         ResultSet rs = null;
-        ApplicationList applicationList = new ApplicationList();
-        Pagination pagination = new Pagination();
         String sql = "SELECT "
                 + "AP_APP.ID AS APP_ID, "
                 + "AP_APP.NAME AS APP_NAME, "
@@ -281,15 +169,11 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
         if (filter == null) {
             throw new ApplicationManagementDAOException("Filter need to be instantiated");
         }
-        if (filter.getAppType() != null && !filter.getAppType().isEmpty()) {
-            sql += " AND AP_APP.TYPE ";
-            sql += "= ?";
-        }
-        if (filter.getAppCategory() != null && !filter.getAppCategory().isEmpty()) {
-            sql += " AND AP_APP.APP_CATEGORY ";
-            sql += "= ?";
+
+        if (!StringUtils.isEmpty(filter.getAppType())) {
+            sql += " AND AP_APP.TYPE = ?";
         }
-        if (filter.getAppName() != null && !filter.getAppName().isEmpty()) {
+        if (!StringUtils.isEmpty(filter.getAppName())) {
             sql += " AND LOWER (AP_APP.NAME) ";
             if (filter.isFullMatch()) {
                 sql += "= ?";
@@ -297,19 +181,30 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
                 sql += "LIKE ?";
             }
         }
-        if (filter.getDeviceTypeId() > 0 ) {
-            sql += " AND AP_APP.DEVICE_TYPE_ID ";
-            sql += "= ?";
+        if (!StringUtils.isEmpty(filter.getSubscriptionType())) {
+            sql += " AND AP_APP.SUB_TYPE = ?";
         }
-
-        String defaultSortOrder = "ASC";
-        if (filter.getSortBy() != null && !filter.getSortBy().isEmpty()) {
-            defaultSortOrder = filter.getSortBy();
+        if (filter.getMinimumRating() > 0) {
+            sql += " AND AP_APP.RATING >= ?";
+        }
+        if (!StringUtils.isEmpty(filter.getVersion())) {
+            sql += " AND AP_APP_RELEASE.VERSION = ?";
+        }
+        if (!StringUtils.isEmpty(filter.getAppReleaseType())) {
+            sql += " AND AP_APP_RELEASE.RELEASE_TYPE = ?";
+        }
+        if (!StringUtils.isEmpty(filter.getAppReleaseState())) {
+            sql += " AND AP_APP_RELEASE.CURRENT_STATE = ?";
+        }
+        if (deviceTypeId > 0) {
+            sql += " AND AP_APP.DEVICE_TYPE_ID = ?";
         }
-        sql += " ORDER BY APP_ID " + defaultSortOrder +" LIMIT ? OFFSET ? ";
 
-        pagination.setLimit(filter.getLimit());
-        pagination.setOffset(filter.getOffset());
+        String sortingOrder = "ASC";
+        if (!StringUtils.isEmpty(filter.getSortBy() )) {
+            sortingOrder = filter.getSortBy();
+        }
+        sql += " ORDER BY APP_ID " + sortingOrder +" LIMIT ? OFFSET ? ";
 
         try {
             conn = this.getDBConnection();
@@ -319,9 +214,6 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
             if (filter.getAppType() != null && !filter.getAppType().isEmpty()) {
                 stmt.setString(paramIndex++, filter.getAppType());
             }
-            if (filter.getAppCategory() != null && !filter.getAppCategory().isEmpty()) {
-                stmt.setString(paramIndex++, filter.getAppCategory());
-            }
             if (filter.getAppName() != null && !filter.getAppName().isEmpty()) {
                 if (filter.isFullMatch()) {
                     stmt.setString(paramIndex++, filter.getAppName().toLowerCase());
@@ -329,11 +221,24 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
                     stmt.setString(paramIndex++, "%" + filter.getAppName().toLowerCase() + "%");
                 }
             }
-            if (filter.getDeviceTypeId() > 0 ) {
-                stmt.setInt(paramIndex++, filter.getDeviceTypeId());
+            if (!StringUtils.isEmpty(filter.getSubscriptionType())) {
+                stmt.setString(paramIndex++, filter.getSubscriptionType());
+            }
+            if (filter.getMinimumRating() > 0) {
+                stmt.setInt(paramIndex++, filter.getMinimumRating());
+            }
+            if (!StringUtils.isEmpty(filter.getVersion())) {
+                stmt.setString(paramIndex++, filter.getVersion());
+            }
+            if (!StringUtils.isEmpty(filter.getAppReleaseType())) {
+                stmt.setString(paramIndex++, filter.getAppReleaseType());
+            }
+            if (!StringUtils.isEmpty(filter.getAppReleaseState())) {
+                stmt.setString(paramIndex++, filter.getAppReleaseState());
+            }
+            if (deviceTypeId > 0 ) {
+                stmt.setInt(paramIndex++, deviceTypeId);
             }
-
-
             if (filter.getLimit() == 0) {
                 stmt.setInt(paramIndex++, 100);
             } else {
@@ -341,11 +246,7 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
             }
             stmt.setInt(paramIndex, filter.getOffset());
             rs = stmt.executeQuery();
-            applicationList.setApplications(Util.loadApplications(rs));
-            applicationList.setPagination(pagination);
-            applicationList.getPagination().setSize(filter.getOffset());
-            applicationList.getPagination().setCount(applicationList.getApplications().size());
-
+            return Util.loadApplications(rs);
         } catch (SQLException e) {
             throw new ApplicationManagementDAOException("Error occurred while getting application list for the tenant"
                     + " " + tenantId + ". While executing " + sql, e);
@@ -358,7 +259,6 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
         } finally {
             Util.cleanupResources(stmt, rs);
         }
-        return applicationList;
     }
 
     @Override
@@ -972,6 +872,70 @@ public class GenericApplicationDAOImpl extends AbstractDAOImpl implements Applic
         }
     }
 
+    @Override
+    public List<String> getAppTags(int appId, int tenantId) throws ApplicationManagementDAOException {
+        if (log.isDebugEnabled()) {
+            log.debug("Request received in DAO Layer to get tags for given application.");
+        }
+        Connection conn;
+        List<String> tags = new ArrayList<>();
+        String sql = "SELECT tag.TAG AS TAG "
+                + "FROM "
+                + "AP_APP_TAG tag INNER JOIN AP_APP_TAG_MAPPING tag_map ON tag.ID = tag_map.AP_APP_TAG_ID "
+                + "INNER JOIN AP_APP app ON tag_map.AP_APP_ID = app.ID "
+                + "WHERE app.ID = ? and app.TENANT_ID = ?";
+        try {
+            conn = this.getDBConnection();
+            try (PreparedStatement stmt = conn.prepareStatement(sql)){
+                stmt.setInt(1, appId);
+                stmt.setInt(2, tenantId);
+                try (ResultSet rs = stmt.executeQuery()) {
+                    while (rs.next()) {
+                        tags.add(rs.getString("TAG"));
+                    }
+                }
+            }
+            return tags;
+        } catch (DBConnectionException e) {
+            throw new ApplicationManagementDAOException(
+                    "Error occurred while obtaining the DB connection when adding tags", e);
+        } catch (SQLException e) {
+            throw new ApplicationManagementDAOException("Error occurred while adding tags", e);
+        }
+    }
+
+    @Override
+    public List<String> getAppCategories(int appId, int tenantId) throws ApplicationManagementDAOException {
+        if (log.isDebugEnabled()) {
+            log.debug("Request received in DAO Layer to get categories for given application.");
+        }
+        Connection conn;
+        List<String> categories = new ArrayList<>();
+        String sql = "SELECT CATEGORY "
+                + "FROM "
+                + "AP_APP_CATEGORY cat INNER JOIN AP_APP_CATEGORY_MAPPING cat_map ON cat.ID = cat_map.AP_APP_CATEGORY_ID "
+                + "INNER JOIN AP_APP app ON cat_map.AP_APP_ID = app.ID "
+                + "WHERE app.ID = ? and app.TENANT_ID = ?";
+        try {
+            conn = this.getDBConnection();
+            try (PreparedStatement stmt = conn.prepareStatement(sql)){
+                stmt.setInt(1, appId);
+                stmt.setInt(2, tenantId);
+                try (ResultSet rs = stmt.executeQuery()) {
+                    while (rs.next()) {
+                        categories.add(rs.getString("CATEGORY"));
+                    }
+                }
+            }
+            return categories;
+        } catch (DBConnectionException e) {
+            throw new ApplicationManagementDAOException(
+                    "Error occurred while obtaining the DB connection when adding tags", e);
+        } catch (SQLException e) {
+            throw new ApplicationManagementDAOException("Error occurred while adding tags", e);
+        }
+    }
+
 
     @Override
     public void deleteTags(List<String> tags, int applicationId, int tenantId) throws ApplicationManagementDAOException {

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/dao/impl/visibility/GenericVisibilityDAOImpl.java

@@ -79,7 +79,9 @@ public class GenericVisibilityDAOImpl extends AbstractDAOImpl implements Visibil
         PreparedStatement stmt = null;
         ResultSet rs = null;
         List<String> unrestrictedRoles = new ArrayList<>();
-        String sql = "SELECT ID, ROLE FROM AP_UNRESTRICTED_ROLE WHERE AP_APP_ID = ? AND TENANT_ID = ?;";
+        String sql = "SELECT ROLE "
+                + "FROM AP_UNRESTRICTED_ROLE "
+                + "WHERE AP_APP_ID = ? AND TENANT_ID = ?";
         try{
             conn = this.getDBConnection();
             conn.setAutoCommit(false);

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java

@@ -30,6 +30,8 @@ import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.application.mgt.common.AppLifecycleState;
 import org.wso2.carbon.device.application.mgt.common.ApplicationArtifact;
 import org.wso2.carbon.device.application.mgt.common.ApplicationInstaller;
+import org.wso2.carbon.device.application.mgt.common.Pagination;
+import org.wso2.carbon.device.application.mgt.common.config.RatingConfiguration;
 import org.wso2.carbon.device.application.mgt.common.dto.ApplicationDTO;
 import org.wso2.carbon.device.application.mgt.common.ApplicationList;
 import org.wso2.carbon.device.application.mgt.common.dto.ApplicationReleaseDTO;
@@ -158,15 +160,15 @@ public class ApplicationManagerImpl implements ApplicationManager {
 
             filter.setFullMatch(true);
             filter.setAppName(applicationDTO.getName().trim());
-            filter.setDeviceTypeId(applicationDTO.getDeviceTypeId());
             filter.setOffset(0);
             filter.setLimit(1);
 
             ConnectionManagerUtil.beginDBTransaction();
-            ApplicationList applicationList = applicationDAO.getApplications(filter, tenantId);
-            if (!applicationList.getApplications().isEmpty()) {
+            List<ApplicationDTO> applicationList = applicationDAO
+                    .getApplications(filter, applicationDTO.getDeviceTypeId(), tenantId);
+            if (!applicationList.isEmpty()) {
                 String msg =
-                        "Already an application registered with same name - " + applicationList.getApplications().get(0)
+                        "Already an application registered with same name - " + applicationList.get(0)
                                 .getName();
                 log.error(msg);
                 throw new RequestValidatingException(msg);
@@ -411,52 +413,110 @@ public class ApplicationManagerImpl implements ApplicationManager {
     }
 
     @Override
-    public ApplicationList getApplications(Filter filter, String deviceTypeName)
-            throws ApplicationManagementException {
+    public ApplicationList getApplications(Filter filter) throws ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
         String userName = PrivilegedCarbonContext.getThreadLocalCarbonContext().getUsername();
-        ApplicationList applicationList;
-        List<ApplicationDTO> apps;
-        List<ApplicationReleaseDTO> releases;
-        DeviceType deviceType;
+        ApplicationList applicationList = new ApplicationList();
+        List<ApplicationDTO> appDTOs;
+        List<Application> applications = new ArrayList<>();
+        List<ApplicationDTO> filteredApplications = new ArrayList<>();
+        DeviceType deviceType = null;
 
-        filter = validateFilter(filter);
-        if (filter == null) {
-            throw new ApplicationManagementException("Filter validation failed, Please verify the request payload");
-        }
-
-        try {
-            if (!StringUtils.isEmpty(deviceTypeName)){
         try {
-                    deviceType = getDeviceTypeData(deviceTypeName);
-                    filter.setDeviceTypeId(deviceType.getId());
-                } catch (UnexpectedServerErrorException e){
-                    throw new ApplicationManagementException(e.getMessage(), e);
+            validateFilter(filter);
+
+            //set default values
+            if (StringUtils.isEmpty(filter.getSortBy())) {
+                filter.setSortBy("ASC");
+            }
+            if (filter.getLimit() == 0) {
+                filter.setLimit(20);
             }
+            String deviceTypename = filter.getDeviceType();
+            if (!StringUtils.isEmpty(deviceTypename)) {
+                deviceType = getDeviceTypeData(deviceTypename);
             }
 
             ConnectionManagerUtil.openDBConnection();
-//            todo modify this logic, join app n release tables
-            applicationList = applicationDAO.getApplications(filter, tenantId);
-            apps = applicationList.getApplications();
-            for ( ApplicationDTO app : apps){
-                if (AppLifecycleState.REMOVED.toString().equals(app.getStatus())){
-                    apps.remove(app);
+            if (deviceType == null) {
+                appDTOs = applicationDAO.getApplications(filter, 0, tenantId);
+            } else {
+                appDTOs = applicationDAO.getApplications(filter, deviceType.getId(), tenantId);
             }
+
+            for (ApplicationDTO app : appDTOs) {
+                boolean isSearchingApp = true;
+                List<String> tags = filter.getTags();
+                List<String> categories = filter.getAppCategories();
+                List<String> unrestrictedRoles = filter.getUnrestrictedRoles();
+
+                if (lifecycleStateManager.getEndState().equals(app.getStatus())) {
+                    isSearchingApp = false;
                 }
-            applicationList.setApplications(apps);
-            if (applicationList.getApplications() != null && !applicationList
-                    .getApplications().isEmpty()) {
-                if (!isAdminUser(userName, tenantId, CarbonConstants.UI_ADMIN_PERMISSION_COLLECTION)) {
-                    applicationList = getRoleRestrictedApplicationList(applicationList, userName);
+                if (unrestrictedRoles != null && !unrestrictedRoles.isEmpty()) {
+
+                    if (!isRoleExists(unrestrictedRoles, userName)) {
+                        String msg = "At least one filtering role is not assigned for the user: " + userName
+                                + ". Hence user " + userName
+                                + " Can't filter applications by giving these unrestriced role list";
+                        log.error(msg);
+                        throw new BadRequestException(msg);
+                    }
+                    List<String> appUnrestrictedRoles = visibilityDAO.getUnrestrictedRoles(app.getId(), tenantId);
+                    boolean isUnrestrictedRoleExistForApp = false;
+                    for (String role : unrestrictedRoles) {
+                        if (appUnrestrictedRoles.contains(role)) {
+                            isUnrestrictedRoleExistForApp = true;
+                            break;
                         }
-                for (ApplicationDTO application : applicationList.getApplications()) {
-                    releases = getReleases(application, filter.getCurrentAppReleaseState());
-                    application.setApplicationReleases(releases);
                     }
+                    if (!isUnrestrictedRoleExistForApp) {
+                        isSearchingApp = false;
                     }
+                }
+                if (tags != null && !tags.isEmpty()) {
+                    List<String> appTagList = applicationDAO.getAppTags(app.getId(), tenantId);
+                    boolean isTagExistForApp = false;
+                    for (String tag : tags) {
+                        if (appTagList.contains(tag)) {
+                            isTagExistForApp = true;
+                            break;
+                        }
+                    }
+                    if (!isTagExistForApp) {
+                        isSearchingApp = false;
+                    }
+                }
+                if (categories != null && !categories.isEmpty()) {
+                    List<String> appTagList = applicationDAO.getAppCategories(app.getId(), tenantId);
+                    boolean isCategoryExistForApp = false;
+                    for (String category : categories) {
+                        if (appTagList.contains(category)) {
+                            isCategoryExistForApp = true;
+                            break;
+                        }
+                    }
+                    if (!isCategoryExistForApp) {
+                        isSearchingApp = false;
+                    }
+                }
+                if (isSearchingApp) {
+                    filteredApplications.add(app);
+                }
+            }
+
+            for(ApplicationDTO appDTO : filteredApplications){
+                applications.add(appDtoToAppResponse(appDTO));
+            }
+            applicationList.setApplications(applications);
+            Pagination pagination = new Pagination();
+            applicationList.setPagination(pagination);
+            applicationList.getPagination().setSize(filter.getOffset());
+            applicationList.getPagination().setCount(applicationList.getApplications().size());
             return applicationList;
-        } catch (UserStoreException e) {
+        }  catch (UnexpectedServerErrorException e){
+            throw new ApplicationManagementException(e.getMessage(), e);
+        }catch (UserStoreException e) {
             throw new ApplicationManagementException(
                     "User-store exception while checking whether the user " + userName + " of tenant " + tenantId
                             + " has the publisher permission", e);
@@ -1165,26 +1225,26 @@ public class ApplicationManagerImpl implements ApplicationManager {
      * @param userName        user name
      * @return ApplicationDTO related with the UUID
      */
-    private ApplicationList getRoleRestrictedApplicationList(ApplicationList applicationList, String userName)
-            throws ApplicationManagementException {
-        ApplicationList roleRestrictedApplicationList = new ApplicationList();
-        ArrayList<ApplicationDTO> unRestrictedApplications = new ArrayList<>();
-        for (ApplicationDTO application : applicationList.getApplications()) {
-            if (application.getUnrestrictedRoles().isEmpty()) {
-                unRestrictedApplications.add(application);
-            } else {
-                try {
-                    if (isRoleExists(application.getUnrestrictedRoles(), userName)) {
-                        unRestrictedApplications.add(application);
-                    }
-                } catch (UserStoreException e) {
-                    throw new ApplicationManagementException("Role restriction verifying is failed");
-                }
-            }
-        }
-        roleRestrictedApplicationList.setApplications(unRestrictedApplications);
-        return roleRestrictedApplicationList;
-    }
+//    private ApplicationList getRoleRestrictedApplicationList(ApplicationList applicationList, String userName)
+//            throws ApplicationManagementException {
+//        ApplicationList roleRestrictedApplicationList = new ApplicationList();
+//        ArrayList<ApplicationDTO> unRestrictedApplications = new ArrayList<>();
+//        for (ApplicationDTO application : applicationList.getApplications()) {
+//            if (application.getUnrestrictedRoles().isEmpty()) {
+//                unRestrictedApplications.add(application);
+//            } else {
+//                try {
+//                    if (isRoleExists(application.getUnrestrictedRoles(), userName)) {
+//                        unRestrictedApplications.add(application);
+//                    }
+//                } catch (UserStoreException e) {
+//                    throw new ApplicationManagementException("Role restriction verifying is failed");
+//                }
+//            }
+//        }
+//        roleRestrictedApplicationList.setApplications(unRestrictedApplications);
+//        return roleRestrictedApplicationList;
+//    }
 
     /**
      * To validate a app release creating request and app updating request to make sure all the pre-conditions
@@ -1397,20 +1457,55 @@ public class ApplicationManagerImpl implements ApplicationManager {
         }
     }
 
-    private Filter validateFilter(Filter filter) {
-        if (filter != null && filter.getAppType() != null) {
-            boolean isValidRequest = false;
+    private void validateFilter(Filter filter) throws BadRequestException {
+        if (filter == null) {
+            String msg = "Filter validation is failed, Filter shouldn't be null, hence please verify the request payload";
+            log.error(msg);
+            throw new BadRequestException(msg);
+        }
+        String appType = filter.getAppType();
+
+        if (!StringUtils.isEmpty(appType)) {
+            boolean isValidAppType = false;
             for (ApplicationType applicationType : ApplicationType.values()) {
-                if (applicationType.toString().equals(filter.getAppType())) {
-                    isValidRequest = true;
+                if (applicationType.toString().equals(appType)) {
+                    isValidAppType = true;
                     break;
                 }
             }
-            if (!isValidRequest) {
-                return null;
+            if (!isValidAppType) {
+                String msg =
+                        "Filter validation is failed, Invalid application type is found in filter. Application Type: "
+                                + appType + " Please verify the request payload";
+                log.error(msg);
+                throw new BadRequestException(msg);
+            }
+        }
+
+        RatingConfiguration ratingConfiguration = ConfigurationManager.getInstance().getConfiguration()
+                .getRatingConfiguration();
+
+        int defaultMinRating = ratingConfiguration.getMinRatingValue();
+        int defaultMaxRating = ratingConfiguration.getMaxRatingValue();
+        int filteringMinRating = filter.getMinimumRating();
+
+        if (filteringMinRating != 0 && (filteringMinRating < defaultMinRating || filteringMinRating > defaultMaxRating))
+        {
+            String msg = "Filter validation is failed, Minimum rating value: " + filteringMinRating
+                    + " is not in the range of default minimum rating value " + defaultMaxRating
+                    + " and default maximum rating " + defaultMaxRating;
+            log.error(msg);
+            throw new BadRequestException(msg);
         }
+
+        String appReleaseState = filter.getAppReleaseState();
+        if (!StringUtils.isEmpty(appReleaseState) && !lifecycleStateManager.isStateExist(appReleaseState)) {
+            String msg = "Filter validation is failed, Requesting to filter by invalid app release state: "
+                    + appReleaseState;
+            log.error(msg);
+            throw new BadRequestException(msg);
         }
-        return filter;
+
     }
 
     private <T> List<T> getDifference(List<T> list1, Collection<T> list2) {

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/lifecycle/LifecycleStateManager.java

@@ -172,7 +172,7 @@ public class LifecycleStateManager {
         return initialState;
     }
 
-    public String getEntState() throws LifecycleManagementException {
+    public String getEndState() throws LifecycleManagementException {
         String endState = null;
         for (Map.Entry<String, State> stringStateEntry : lifecycleStates.entrySet()) {
             if (stringStateEntry.getValue().isEndState()) {
@@ -189,6 +189,15 @@ public class LifecycleStateManager {
         return endState;
     }
 
+    public boolean isStateExist(String currentState) {
+        for (Map.Entry<String, State> stringStateEntry : lifecycleStates.entrySet()) {
+            if (stringStateEntry.getKey().equalsIgnoreCase(currentState)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     public void setLifecycleStates(Map<String, State> lifecycleStates) {
         this.lifecycleStates = lifecycleStates;
     }

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/util/APIUtil.java

@@ -18,6 +18,7 @@
 
 package org.wso2.carbon.device.application.mgt.core.util;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
@@ -164,26 +165,29 @@ public class APIUtil {
         return appmDataHandler;
     }
 
-    public static Filter constructFilter( String appName, String appType, String appCategory,
-            boolean isFullMatch, String releaseState, int offset, int limit, String sortBy) {
-        Filter filter = new Filter();
-        filter.setOffset(offset);
-        filter.setLimit(limit);
-        filter.setSortBy(sortBy);
-        filter.setFullMatch(isFullMatch);
-        if (appName != null && !appName.isEmpty()) {
-            filter.setAppName(appName);
-        }
-        if (appType != null && !appType.isEmpty()) {
-            filter.setAppType(appType);
-        }
-        if (appCategory != null && !appCategory.isEmpty()) {
-            filter.setAppCategory(appCategory);
-        }
-        if (releaseState != null && !releaseState.isEmpty()) {
-            filter.setCurrentAppReleaseState(releaseState);
-        }
-        return filter;
-    }
+//    public static Filter constructFilter( String appName, String appType, String appCategory, String tags,
+//            boolean isFullMatch, String releaseState, int offset, int limit, String sortBy) {
+//        Filter filter = new Filter();
+//        filter.setOffset(offset);
+//        filter.setLimit(limit);
+//        filter.setSortBy(sortBy);
+//        filter.setFullMatch(isFullMatch);
+//        if (!StringUtils.isEmpty(appName)) {
+//            filter.setAppName(appName);
+//        }
+//        if (!StringUtils.isEmpty(appType)) {
+//            filter.setAppType(appType);
+//        }
+//        if (!StringUtils.isEmpty(appCategory)) {
+//            filter.setAppCategories(appCategory);
+//        }
+//        if (!StringUtils.isEmpty(tags)) {
+//            filter.setAppCategories(appCategory);
+//        }
+//        if (!StringUtils.isEmpty(releaseState)) {
+//            filter.setAppReleaseState(releaseState);
+//        }
+//        return filter;
+//    }
 
 }

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementAPI.java

@@ -95,7 +95,7 @@ public interface ApplicationManagementAPI {
 
     String SCOPE = "scope";
 
-    @GET
+    @POST
     @Produces(MediaType.APPLICATION_JSON)
     @Consumes(MediaType.APPLICATION_JSON)
     @ApiOperation(
@@ -125,48 +125,12 @@ public interface ApplicationManagementAPI {
                             code = 500,
                             message = "Internal Server Error. \n Error occurred while getting the application list.",
                             response = ErrorResponse.class)
-            })
-    Response getApplications(
-            @ApiParam(
-                    name = "deviceType",
-                    value = "Supporting device Type of the application")
-            @QueryParam("device-type") String deviceType,
-            @ApiParam(
-                    name = "name",
-                    value = "Name of the application")
-            @QueryParam("name") String appName,
-            @ApiParam(
-                    name = "type",
-                    value = "Type of the application")
-            @QueryParam("type") String appType,
-            @ApiParam(
-                    name = "category",
-                    value = "CategoryDTO of the application")
-            @QueryParam("category") String appCategory,
+            }) Response getApplications(
                     @ApiParam(
-                    name = "exact-match",
-                    value = "Is it requesting exactly matching application or partially matching application.")
-            @QueryParam("exact-match") boolean isFullMatch,
-            @ApiParam(
-                    name = "release-state",
-                    value = "Current state of the application release")
-            @QueryParam("release-state") String releaseState,
-            @ApiParam(
-                    name = "offset",
-                    value = "offset",
-                    defaultValue = "0")
-            @QueryParam("offset") int offset,
-            @ApiParam(
-                    name = "limit",
-                    value = "limit",
-                    defaultValue = "20")
-            @QueryParam("limit") int limit,
-            @ApiParam(
-                    name = "sort",
-                    value = "Sorting type",
-                    defaultValue = "AES")
-            @QueryParam("sort") String sortBy
-    );
+                            name = "Filter",
+                            value = "Get application filter",
+                            required = true)
+                    @Valid Filter filter);
 
     @GET
     @Path("/{appId}")

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementAPIImpl.java

@@ -70,33 +70,22 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
 
     private static Log log = LogFactory.getLog(ApplicationManagementAPIImpl.class);
 
-    @GET
+    @POST
     @Override
     @Consumes("application/json")
     public Response getApplications(
-            @QueryParam("device-type") String deviceType,
-            @QueryParam("name") String appName,
-            @QueryParam("type") String appType,
-            @QueryParam("category") String appCategory,
-            @QueryParam("exact-match") boolean isFullMatch,
-            @QueryParam("release-state") String releaseState,
-            @DefaultValue("0") @QueryParam("offset") int offset,
-            @DefaultValue("20") @QueryParam("limit") int limit,
-            @DefaultValue("ASC") @QueryParam("sort") String sortBy) {
+            @Valid Filter filter ){
         ApplicationManager applicationManager = APIUtil.getApplicationManager();
 
         try {
-            Filter filter = APIUtil
-                    .constructFilter(appName, appType, appCategory, isFullMatch, releaseState, offset,
-                            limit, sortBy);
-            ApplicationList applications = applicationManager.getApplications(filter, deviceType);
+            ApplicationList applications = applicationManager.getApplications(filter);
             if (applications.getApplications().isEmpty()) {
                 return Response.status(Response.Status.NOT_FOUND)
                         .entity("Couldn't find any application for the requested query.").build();
             }
             return Response.status(Response.Status.OK).entity(applications).build();
         } catch(BadRequestException e){
-            String msg = "Couldn't found a device type for " + deviceType;
+            String msg = "Incompatible request payload is found. Please try with valid reuest payload.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         }catch (ApplicationManagementException e) {

components/application-mgt/org.wso2.carbon.device.application.mgt.store.api/src/main/java/org/wso2/carbon/device/application/mgt/store/api/services/impl/ApplicationManagementAPIImpl.java

@@ -67,17 +67,17 @@ public class ApplicationManagementAPIImpl implements ApplicationManagementAPI {
             filter.setLimit(limit);
             filter.setSortBy(sortBy);
             filter.setFullMatch(isFullMatch);
-            filter.setCurrentAppReleaseState(AppLifecycleState.PUBLISHED.toString());
+            filter.setAppReleaseState(AppLifecycleState.PUBLISHED.toString());
             if (appName != null && !appName.isEmpty()) {
                 filter.setAppName(appName);
             }
             if (appType != null && !appType.isEmpty()) {
                 filter.setAppType(appType);
             }
-            if (appCategory != null && !appCategory.isEmpty()) {
-                filter.setAppCategory(appCategory);
-            }
-            ApplicationList applications = applicationManager.getApplications(filter, null);
+//            if (appCategory != null && !appCategory.isEmpty()) {
+//                filter.setAppCategories(appCategory);
+//            }
+            ApplicationList applications = applicationManager.getApplications(filter);
             if (applications.getApplications().isEmpty()) {
                 return Response.status(Response.Status.NOT_FOUND)
                         .entity("Couldn't find any application for requested query.").build();

features/application-mgt/org.wso2.carbon.device.application.mgt.server.feature/src/main/resources/conf/application-mgt.xml

@@ -174,4 +174,9 @@
         <Category>EMM</Category>
         <Category>IoT</Category>
     </AppCategories>
+
+    <RatingConfig>
+        <MinRatingValue>1</MinRatingValue>
+        <MaxRatingValue>10</MaxRatingValue>
+    </RatingConfig>
 </ApplicationManagementConfiguration>