/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013-2017 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.server.validation.internal;
import java.lang.annotation.ElementType;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.validation.Path;
import javax.validation.TraversableResolver;
import org.glassfish.jersey.internal.util.ReflectionHelper;
/**
* {@link TraversableResolver Traversable resolver} used for handling {@link javax.validation.executable.ValidateOnExecution}
* annotations present on property getters when validating resource class.
*
* @author Michal Gajdos
*/
class ValidateOnExecutionTraversableResolver implements TraversableResolver {
private final TraversableResolver delegate;
private final ConcurrentMap<String, Method> propertyToMethod = new ConcurrentHashMap<>();
private final ValidateOnExecutionHandler validateOnExecutionHandler;
private final boolean validateExecutable;
/**
* Create a new {@link ValidateOnExecutionTraversableResolver}.
*
* @param delegate delegate requests to this underlying traversable resolver if this one cannot resolve it.
* @param validateOnExecutionHandler handler to determine whether a getter should be validated or not.
* @param validateExecutable bootstrap flag to enable/disable global validation of executables.
*/
public ValidateOnExecutionTraversableResolver(final TraversableResolver delegate,
final ValidateOnExecutionHandler validateOnExecutionHandler,
final boolean validateExecutable) {
this.delegate = delegate;
this.validateExecutable = validateExecutable;
this.validateOnExecutionHandler = validateOnExecutionHandler;
}
@Override
public boolean isReachable(final Object traversableObject,
final Path.Node traversableProperty,
final Class<?> rootBeanType,
final Path pathToTraversableObject,
final ElementType elementType) {
// Make sure only getters on entities are validated (not getters on resource classes).
final Class<?> traversableObjectClass = traversableObject.getClass();
final boolean isEntity = !rootBeanType.equals(traversableObjectClass);
if (isEntity && validateExecutable && ElementType.METHOD.equals(elementType)) {
final String propertyName = traversableProperty.getName();
final String propertyKey = traversableObjectClass.getName() + "#" + propertyName;
if (!propertyToMethod.containsKey(propertyKey)) {
final Method getter = getGetterMethod(traversableObjectClass, propertyName);
if (getter != null) {
propertyToMethod.putIfAbsent(propertyKey, getter);
}
}
final Method getter = propertyToMethod.get(propertyKey);
return getter != null && validateOnExecutionHandler.validateGetter(traversableObjectClass, getter);
}
return delegate.isReachable(traversableObject, traversableProperty, rootBeanType, pathToTraversableObject, elementType);
}
@Override
public boolean isCascadable(final Object traversableObject,
final Path.Node traversableProperty,
final Class<?> rootBeanType,
final Path pathToTraversableObject,
final ElementType elementType) {
return delegate.isCascadable(traversableObject, traversableProperty, rootBeanType, pathToTraversableObject, elementType);
}
/**
* Return getter method defined on {@code clazz} of property with given {@code propertyName}.
*
* @param clazz class to find a getter method on.
* @param propertyName name of the property to find a getter for.
* @return getter method or {@code null} if the method cannot be found.
*/
private Method getGetterMethod(final Class<?> clazz, final String propertyName) {
// Property type.
Class<?> propertyType = null;
for (final Field field : AccessController.doPrivileged(ReflectionHelper.getAllFieldsPA(clazz))) {
if (field.getName().equals(propertyName)) {
propertyType = field.getType();
}
}
final char[] chars = propertyName.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
final String getterPropertyName = new String(chars);
final String isGetter = "is" + getterPropertyName;
final String getGetter = "get" + getterPropertyName;
for (final Method method : AccessController.doPrivileged(ReflectionHelper.getMethodsPA(clazz))) {
final String methodName = method.getName();
if ((methodName.equals(isGetter) || methodName.equals(getGetter))
&& ReflectionHelper.isGetter(method)
&& (propertyType == null || propertyType.isAssignableFrom(method.getReturnType()))) {
return AccessController.doPrivileged(ReflectionHelper.findMethodOnClassPA(clazz, method));
}
}
return null;
}
}