resourcehttpoptionsmethod.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 92 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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 * 
 * 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.impl.model.method;

import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.uri.UriTemplate;
import com.sun.jersey.spi.dispatch.RequestDispatcher;
import com.sun.jersey.impl.model.MediaTypeHelper;
import java.util.List;
import java.util.Map;
import javax.ws.rs.core.Response;

/**
 *
 * @author [e-mail]
 */
public final class ResourceHttpOptionsMethod extends ResourceMethod {
    
    public static class OptionsRequestDispatcher implements RequestDispatcher {
        protected final String allow;
        
        public OptionsRequestDispatcher(Map<String, List<ResourceMethod>> methods) {
            this.allow = getAllow(methods);
        }
        
        private String getAllow(Map<String, List<ResourceMethod>> methods) {
            StringBuilder s = new StringBuilder();
            boolean first = true;
            for (String method : methods.keySet()) {
                if (!first) s.append(",");
                first = false;

                s.append(method);
            }

            return s.toString();
        }
    
        public void dispatch(Object resource, HttpContext context) {
            Response r = Response.noContent().header("Allow", allow).build();
            context.getResponse().setResponse(r, null);
        }
    }
    
    public ResourceHttpOptionsMethod(Map<String, List<ResourceMethod>> methods) {
        super("OPTIONS",
                UriTemplate.EMPTY,
                MediaTypeHelper.GENERAL_MEDIA_TYPE_LIST, 
                MediaTypeHelper.GENERAL_MEDIA_TYPE_LIST,
                new OptionsRequestDispatcher(methods));
    }
    
    @Override
    public String toString() {
        return "OPTIONS";
    }
}