/*
* 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.message.filtering.spi;
import java.lang.annotation.Annotation;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;
import java.security.AccessController;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import javax.xml.bind.JAXBElement;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.internal.util.collection.DataStructures;
/**
* SPI utility methods for entity filtering.
*
* @author Michal Gajdos
*/
public final class FilteringHelper {
/**
* Empty annotation array.
*/
public static final Annotation[] EMPTY_ANNOTATIONS = new Annotation[0];
private static final ConcurrentMap<Type, Class<?>> ENTITY_CLASSES = DataStructures.createConcurrentMap();
/**
* Determine whether given class is filterable by entity-filtering. Filterable classes are all classes that are not primitives
* and are not in a package matching <code>java.*</code>.
*
* @param clazz entity class to be examined.
* @return {@code true} whether the class is filterable, {@code false otherwise}.
*/
public static boolean filterableEntityClass(final Class<?> clazz) {
return !ReflectionHelper.isPrimitive(clazz) && !clazz.getPackage().getName().startsWith("java.");
}
/**
* A convenience method to get the domain class (i.e. <i>Customer</i>) from the generic type (i.e. <i>Customer</i>,
* <i>List<Customer></i>, <i>JAXBElement<Customer></i>, <i>JAXBElement<? extends Customer></i>,
* <i>List<JAXBElement<Customer>></i>, or <i>List<JAXBElement<? extends Customer>></i>).
*
* @param genericType type to obtain entity domain class for.
* @return entity domain class.
*/
public static Class<?> getEntityClass(final Type genericType) {
if (!ENTITY_CLASSES.containsKey(genericType)) {
ENTITY_CLASSES.putIfAbsent(genericType, _getEntityClass(genericType));
}
return ENTITY_CLASSES.get(genericType);
}
/**
* Note: This method was copied from {@code MOXyJsonProvider}.
*/
@SuppressWarnings("JavaDoc")
private static Class<?> _getEntityClass(final Type genericType) {
if (null == genericType) {
return Object.class;
}
if (genericType instanceof Class && genericType != JAXBElement.class) {
final Class<?> clazz = (Class<?>) genericType;
if (clazz.isArray()) {
return _getEntityClass(clazz.getComponentType());
}
return clazz;
} else if (genericType instanceof ParameterizedType) {
final ParameterizedType parameterizedType = (ParameterizedType) genericType;
final Type[] arguments = parameterizedType.getActualTypeArguments();
final Type type = parameterizedType.getRawType() == Map.class ? arguments[1] : arguments[0];
if (type instanceof ParameterizedType) {
final Type rawType = ((ParameterizedType) type).getRawType();
if (rawType == JAXBElement.class) {
return _getEntityClass(type);
}
} else if (type instanceof WildcardType) {
final Type[] upperTypes = ((WildcardType) type).getUpperBounds();
if (upperTypes.length > 0) {
final Type upperType = upperTypes[0];
if (upperType instanceof Class) {
return (Class<?>) upperType;
}
}
} else if (JAXBElement.class == type
|| type instanceof TypeVariable) {
return Object.class;
}
//noinspection ConstantConditions
return (Class<?>) type;
} else if (genericType instanceof GenericArrayType) {
final GenericArrayType genericArrayType = (GenericArrayType) genericType;
return _getEntityClass(genericArrayType.getGenericComponentType());
} else {
return Object.class;
}
}
/**
* Get accessor method mappings (field -> getter/setter) for given class.
*
* @param clazz entity class to obtain property methods for.
* @param isGetter flag determining whether to look for getters or setters.
* @return non-null map of field-accessor mappings.
*/
public static Map<String, Method> getPropertyMethods(final Class<?> clazz, final boolean isGetter) {
final Map<String, Method> methods = new HashMap<>();
for (final Method method : AccessController.doPrivileged(ReflectionHelper.getDeclaredMethodsPA(clazz))) {
if ((isGetter && ReflectionHelper.isGetter(method))
|| (!isGetter && ReflectionHelper.isSetter(method))) {
methods.put(ReflectionHelper.getPropertyName(method), method);
}
}
final Class<?> parent = clazz.getSuperclass();
// We're interested in fields/accessors in superclasses but not those from i.e. Object/Enum.
if (parent != null && !parent.getPackage().getName().startsWith("java.lang")) {
methods.putAll(getPropertyMethods(parent, isGetter));
}
return methods;
}
/**
* Get a set containing default filtering scope.
*
* @return default filtering scope.
*/
public static Set<String> getDefaultFilteringScope() {
return Collections.singleton(ScopeProvider.DEFAULT_SCOPE);
}
/**
* Prevent instantiation.
*/
private FilteringHelper() {
}
}