entitytagprovider.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 80 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]"
 * 
 * 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.impl.provider.header;

import com.sun.jersey.impl.http.header.reader.HttpHeaderReader;
import com.sun.jersey.impl.http.header.reader.HttpHeaderReaderImpl;
import com.sun.jersey.impl.http.header.writer.WriterUtil;
import com.sun.jersey.spi.HeaderDelegateProvider;
import java.text.ParseException;
import javax.ws.rs.core.EntityTag;

/**
 *
 * @author [e-mail]
 */
public class EntityTagProvider implements HeaderDelegateProvider<EntityTag> {
    
    public boolean supports(Class<?> type) {
        return type == EntityTag.class;
    }

    public String toString(EntityTag header) {
        StringBuilder b = new StringBuilder();
        if (header.isWeak())
            b.append("W/");
        WriterUtil.appendQuoted(b,header.getValue());
        return b.toString();
    }

    public EntityTag fromString(String header) {
        boolean weak = false;
        if (header.startsWith("W/")) {
            header = header.substring(2);
            weak = true;
        }
        HttpHeaderReader reader = new HttpHeaderReaderImpl(header);
        try {
            EntityTag eTag = new EntityTag(reader.nextQuotedString(),weak);
            return eTag;
        } catch (ParseException ex) {
            throw new IllegalArgumentException(ex);
        }
    }    
}