forked from community/device-mgt-core
geethkokila
6 years ago
parent
7630cb0fb1
commit
c23770db33
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/*
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* Copyright (c) 2018, 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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package org.wso2.carbon.device.application.mgt.publisher.api;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.cxf.interceptor.Fault;
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import org.apache.cxf.jaxrs.lifecycle.ResourceProvider;
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import org.apache.cxf.jaxrs.model.ClassResourceInfo;
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import org.apache.cxf.jaxrs.model.OperationResourceInfo;
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import org.apache.cxf.message.Message;
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import org.apache.cxf.message.MessageContentsList;
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import org.apache.cxf.phase.AbstractPhaseInterceptor;
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import org.apache.cxf.phase.Phase;
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import javax.validation.*;
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import javax.validation.executable.ExecutableValidator;
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import java.lang.reflect.Method;
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import java.util.List;
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import java.util.Set;
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public class ValidationInterceptor extends AbstractPhaseInterceptor<Message> {
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private Log log = LogFactory.getLog(getClass());
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private Validator validator = null; //validator interface is thread-safe
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public ValidationInterceptor() {
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super(Phase.PRE_INVOKE);
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ValidatorFactory defaultFactory = Validation.buildDefaultValidatorFactory();
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validator = defaultFactory.getValidator();
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if (validator == null) {
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log.warn("Bean Validation provider could not be found, no validation will be performed");
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} else {
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log.debug("Validation In-Interceptor initialized successfully");
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}
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}
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@Override
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public void handleMessage(Message message) throws Fault {
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final OperationResourceInfo operationResource = message.getExchange().get(OperationResourceInfo.class);
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if (operationResource == null) {
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log.info("OperationResourceInfo is not available, skipping validation");
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return;
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}
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final ClassResourceInfo classResource = operationResource.getClassResourceInfo();
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if (classResource == null) {
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log.info("ClassResourceInfo is not available, skipping validation");
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return;
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}
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final ResourceProvider resourceProvider = classResource.getResourceProvider();
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if (resourceProvider == null) {
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log.info("ResourceProvider is not available, skipping validation");
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return;
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}
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final List<Object> arguments = MessageContentsList.getContentsList(message);
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final Method method = operationResource.getAnnotatedMethod();
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final Object instance = resourceProvider.getInstance(message);
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if (method != null && arguments != null) {
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//validate the parameters(arguments) over the invoked method
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validate(method, arguments.toArray(), instance);
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//validate the fields of each argument
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for (Object arg : arguments) {
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if (arg != null)
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validate(arg);
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}
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}
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}
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public <T> void validate(final Method method, final Object[] arguments, final T instance) {
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if (validator == null) {
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log.warn("Bean Validation provider could not be found, no validation will be performed");
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return;
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}
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ExecutableValidator methodValidator = validator.forExecutables();
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Set<ConstraintViolation<T>> violations = methodValidator.validateParameters(instance,
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method, arguments);
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if (!violations.isEmpty()) {
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throw new ConstraintViolationException(violations);
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}
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}
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public <T> void validate(final T object) {
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if (validator == null) {
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log.warn("Bean Validation provider could be found, no validation will be performed");
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return;
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}
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Set<ConstraintViolation<T>> violations = validator.validate(object);
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if (!violations.isEmpty()) {
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throw new ConstraintViolationException(violations);
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}
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}
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public void handleFault(org.apache.cxf.message.Message messageParam) {
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}
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}
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