userresource.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 159 行

/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. 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 https://jersey.dev.java.net/CDDL+GPL.html
 * or jersey/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 jersey/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
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 * 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.samples.bookmark.resources;

import com.sun.jersey.api.NotFoundException;
import com.sun.jersey.samples.bookmark.entities.UserEntity;
import com.sun.jersey.samples.bookmark.util.tx.TransactionManager;
import com.sun.jersey.samples.bookmark.util.tx.Transactional;
import javax.persistence.EntityManager;
import javax.ws.rs.ConsumeMime;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.ProduceMime;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 *
 * @author Jakub Podlesak, Paul Sandoz
 */
public class UserResource {
    
    String userid; // userid from url
    UserEntity userEntity; // appropriate jpa user entity
    
    UriInfo uriInfo; // actual uri info provided by parent resource
    EntityManager em; // entity manager provided by parent resource
    
    /** Creates a new instance of UserResource */
    public UserResource(UriInfo uriInfo, EntityManager em, String userid) {
        this.uriInfo = uriInfo;
        this.userid = userid;
        this.em = em;
        userEntity = em.find(UserEntity.class, userid);
    }
    
    @Path("bookmarks/")
    public BookmarksResource getBookmarksResource() {
        if (null == userEntity) {
            throw new NotFoundException("userid " + userid + " does not exist!");
        }
        return new BookmarksResource(uriInfo, em, this);
    }
    
    
    @GET
    @ProduceMime("application/json")
    public JSONObject getUser() throws JSONException {
        if (null == userEntity) {
            throw new NotFoundException("userid " + userid + "does not exist!");
        }
        return new JSONObject()
            .put("userid", userEntity.getUserid())
            .put("username", userEntity.getUsername())
            .put("email", userEntity.getEmail())
            .put("password", userEntity.getPassword())
            .put("bookmarks", uriInfo.getAbsolutePathBuilder().path("bookmarks").build());
    }
    
    @PUT
    @ConsumeMime("application/json")
    public Response putUser(JSONObject jsonEntity) throws JSONException {
        
        String jsonUserid = jsonEntity.getString("userid");
        
        if ((null != jsonUserid) && !jsonUserid.equals(userid)) {
            return Response.status(409).entity("userids differ!\n").build();
        }
        
        final boolean newRecord = (null == userEntity); // insert or update ?
        
        if (newRecord) { // new user record to be inserted
            userEntity = new UserEntity();
            userEntity.setUserid(userid);
        }
        userEntity.setUsername(jsonEntity.getString("username"));
        userEntity.setEmail(jsonEntity.getString("email"));
        userEntity.setPassword(jsonEntity.getString("password"));
        
        if (newRecord) {
            TransactionManager.manage(new Transactional(em) { public void transact() {
                em.persist(userEntity);
            }});
            return Response.created(uriInfo.getAbsolutePath()).build();
        } else {
            TransactionManager.manage(new Transactional(em) { public void transact() {
                em.merge(userEntity);
            }});
            return Response.noContent().build();
        }
    }
    
    @DELETE
    public void deleteUser() {
        if (null == userEntity) {
            throw new NotFoundException("userid " + userid + "does not exist!");
        }
        TransactionManager.manage(new Transactional(em) { public void transact() {
            em.remove(userEntity);
        }});
    }
    
    
    public String asString() {
        return toString();
    }
    
    public String toString() {
        return userEntity.getUserid();
    }
    
    public UserResource(UserEntity userEntity) {
        this.userEntity = userEntity;
    }
    
    public UserEntity getUserEntity() {
        return userEntity;
    }
}