megala21
7 years ago
parent
e26d859236
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/*
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* Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
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*
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* WSO2 Inc. licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*
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*/
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package org.wso2.carbon.device.application.mgt.core.dao.impl.category;
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import org.wso2.carbon.device.application.mgt.common.Category;
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import org.wso2.carbon.device.application.mgt.common.exception.DBConnectionException;
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import org.wso2.carbon.device.application.mgt.core.dao.CategoryDAO;
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import org.wso2.carbon.device.application.mgt.core.dao.common.Util;
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import org.wso2.carbon.device.application.mgt.core.dao.impl.AbstractDAOImpl;
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import org.wso2.carbon.device.application.mgt.core.exception.ApplicationManagementDAOException;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* This is the concrete implementation of {@link CategoryDAO}.
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*/
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public class GenericCategoryDAOImpl extends AbstractDAOImpl implements CategoryDAO {
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@Override
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public Category addCategory(Category category) throws ApplicationManagementDAOException {
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Connection connection;
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PreparedStatement statement = null;
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String sql = "INSERT INTO APPM_APPLICATION_CATEGORY (NAME, DESCRIPTION) VALUES (?, ?)";
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String[] generatedColumns = { "ID" };
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ResultSet rs = null;
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try {
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connection = this.getDBConnection();
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statement = connection.prepareStatement(sql, generatedColumns);
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statement.setString(1, category.getName());
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statement.setString(2, category.getDescription());
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statement.executeUpdate();
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rs = statement.getGeneratedKeys();
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if (rs.next()) {
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category.setId(rs.getInt(1));
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}
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return category;
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} catch (DBConnectionException e) {
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throw new ApplicationManagementDAOException(
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"Database connection while trying to update the categroy " + category.getName(), e);
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} catch (SQLException e) {
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throw new ApplicationManagementDAOException("SQL exception while executing the query '" + sql + "' .", e);
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} finally {
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Util.cleanupResources(statement, rs);
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}
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}
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@Override
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public List<Category> getCategories() throws ApplicationManagementDAOException {
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Connection conn;
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PreparedStatement stmt = null;
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ResultSet rs = null;
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String sql = "SELECT * FROM APPM_APPLICATION_CATEGORY";
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List<Category> categories = new ArrayList<>();
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try {
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conn = this.getDBConnection();
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stmt = conn.prepareStatement(sql);
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rs = stmt.executeQuery();
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while (rs.next()) {
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Category category = new Category();
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category.setId(rs.getInt("ID"));
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category.setName(rs.getString("NAME"));
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category.setDescription(rs.getString("DESCRIPTION"));
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categories.add(category);
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}
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return categories;
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} catch (DBConnectionException e) {
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throw new ApplicationManagementDAOException("Database Connection Exception while trying to get the "
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+ "application categories", e);
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} catch (SQLException e) {
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throw new ApplicationManagementDAOException("SQL Exception while trying to get the application "
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+ "categories, while executing " + sql, e);
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} finally {
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Util.cleanupResources(stmt, rs);
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}
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}
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@Override
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public Category getCategory(String name) throws ApplicationManagementDAOException {
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Connection conn;
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PreparedStatement stmt = null;
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ResultSet rs = null;
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String sql = "SELECT * FROM APPM_APPLICATION_CATEGORY WHERE NAME = ?";
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try {
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conn = this.getDBConnection();
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stmt = conn.prepareStatement(sql);
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stmt.setString(1, name);
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rs = stmt.executeQuery();
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if (rs.next()) {
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Category category = new Category();
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category.setId(rs.getInt("ID"));
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category.setName(rs.getString("NAME"));
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category.setDescription(rs.getString("DESCRIPTION"));
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return category;
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}
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return null;
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} catch (DBConnectionException e) {
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throw new ApplicationManagementDAOException("Database Connection Exception while trying to get the "
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+ "application categories", e);
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} catch (SQLException e) {
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throw new ApplicationManagementDAOException("SQL Exception while trying to get the application "
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+ "categories, while executing " + sql, e);
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} finally {
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Util.cleanupResources(stmt, rs);
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}
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}
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@Override
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public void deleteCategory(String name) throws ApplicationManagementDAOException {
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Connection conn;
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PreparedStatement stmt = null;
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String sql = "DELETE FROM APPM_APPLICATION_CATEGORY WHERE NAME = ?";
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try {
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conn = this.getDBConnection();
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stmt = conn.prepareStatement(sql);
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stmt.setString(1, name);
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stmt.executeUpdate();
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} catch (DBConnectionException e) {
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throw new ApplicationManagementDAOException(
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"Database Connection Exception while trying to delete the category " + name, e);
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} catch (SQLException e) {
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throw new ApplicationManagementDAOException(
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"SQL Exception while trying to delete the category " + name + " while executing the query " +
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sql, e);
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} finally {
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Util.cleanupResources(stmt, null);
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}
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}
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}
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