All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • com.sun.jersey.server.linking.impl.RefProcessor Maven / Gradle / Ivy

    There is a newer version: 1.19.4
    Show newest version
    /*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2013 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 com.sun.jersey.server.linking.impl;

import java.net.URI;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.core.UriInfo;

import com.sun.jersey.impl.ImplMessages;
import com.sun.jersey.server.linking.el.LinkBuilder;

/**
 * Utility class that can inject links into {@link com.sun.jersey.server.linking.Link} annotated fields in
 * an entity.
 * @author mh124079
 */
public class RefProcessor {

    private EntityDescriptor instanceDescriptor;
    private static final Logger log = Logger.getLogger(RefProcessor.class.getName());

    public RefProcessor(Class c) {
        instanceDescriptor = EntityDescriptor.getInstance(c);
    }

    /**
     * Inject any {@link com.sun.jersey.server.linking.Link} annotated fields in the supplied entity and
     * recursively process its fields.
     * @param entity the entity object returned by the resource method
     * @param uriInfo the uriInfo for the request
     */
    public void processLinks(T entity, UriInfo uriInfo) {
        Set processed = new HashSet();
        Object resource = uriInfo.getMatchedResources().get(0);
        processLinks(entity, resource, entity, processed, uriInfo);
    }

    /**
     * Inject any {@link com.sun.jersey.server.linking.Link} annotated fields in the supplied instance. Called
     * once for the entity and then recursively for each member and field.
     * @param entity
     * @param processed a list of already processed objects, used to break
     * recursion when processing circular references.
     * @param uriInfo
     */
    private void processLinks(Object entity, Object resource, Object instance,
                              Set processed, UriInfo uriInfo) {

        try {
            if (instance == null || processed.contains(instance))
                return; // ignore null properties and defeat circular references
            processed.add(instance);
        } catch (RuntimeException e) {
            // fix for JERSEY-1656
            log.log(Level.INFO, ImplMessages.WARNING_LINKFILTER_PROCESSING(instance.getClass().getName()), e);
        }

        // Process any @Link annotated fields in entity
        for (RefFieldDescriptor linkField : instanceDescriptor.getLinkFields()) {
            if (LinkBuilder.evaluateCondition(linkField.getCondition(), entity, resource, instance)) {
                URI uri = LinkBuilder.buildURI(linkField, entity, resource, instance, uriInfo);
                linkField.setPropertyValue(instance, uri);
            }
        }

        // If entity is an array or collection then process members
        Class instanceClass = instance.getClass();
        if (instanceClass.isArray() && Object[].class.isAssignableFrom(instanceClass)) {
            Object array[] = (Object[]) instance;
            for (Object member : array) {
                processMember(entity, resource, member, processed, uriInfo);
            }
        } else if (instance instanceof Collection) {
            Collection collection = (Collection) instance;
            for (Object member : collection) {
                processMember(entity, resource, member, processed, uriInfo);
            }
        }

        // Recursively process all member fields
        for (FieldDescriptor member : instanceDescriptor.getNonLinkFields()) {
            processMember(entity, resource, member.getFieldValue(instance), processed, uriInfo);
        }

    }

    private void processMember(Object entity, Object resource, Object member, Set processed, UriInfo uriInfo) {
        if (member != null) {
            RefProcessor proc = new RefProcessor(member.getClass());
            proc.processLinks(entity, resource, member, processed, uriInfo);
        }
    }

}
    
    
    
    

    




    
    
    © 2015 - 2024 Weber Informatics LLC | Privacy Policy