httpreqresdispatchprovider.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 82 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.
 * 
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 * Header, with the fields enclosed by brackets [] replaced by your own
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package com.sun.jersey.impl.model.method.dispatch;

import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.core.HttpRequestContext;
import com.sun.jersey.api.core.HttpResponseContext;
import com.sun.jersey.api.model.AbstractResourceMethod;
import com.sun.jersey.spi.dispatch.RequestDispatcher;
import java.lang.reflect.InvocationTargetException;
import javax.ws.rs.core.MediaType;

/**
 *
 * @author [e-mail]
 */
public class HttpReqResDispatchProvider implements ResourceMethodDispatchProvider {
    
    static final class HttpReqResDispatcher extends ResourceJavaMethodDispatcher {
        HttpReqResDispatcher(AbstractResourceMethod abstractResourceMethod) {
            super(abstractResourceMethod);
        }

        public void _dispatch(Object resource, HttpContext context) 
        throws IllegalAccessException, InvocationTargetException {
            method.invoke(resource, context.getRequest(), context.getResponse());
            MediaType m = getAcceptableMediaType(context.getRequest());
            if (m != null) 
                context.getResponse().
                        getHttpHeaders().putSingle("Content-Type", m);
        }
    }

    
    public RequestDispatcher create(AbstractResourceMethod abstractResourceMethod) {
        // TODO: add return type to ARM
        if (abstractResourceMethod.getMethod().getReturnType() != void.class) return null;
        
        // TODO: use ARM getParams instead
        Class<?>[] parameters = abstractResourceMethod.getMethod().getParameterTypes();
        if (parameters.length != 2) return null;
        if (parameters[0] != HttpRequestContext.class) return null;
        if (parameters[1] != HttpResponseContext.class) return null;
                
        return new HttpReqResDispatcher(abstractResourceMethod);
    }
}