changedresourceservlet.java

web版的SVN客户端

/*
 * Copyright (c) 2004, 2005 Polarion Software, All rights reserved.
 * Email: [e-mail]
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 (the "License"). You may not use
 * this file except in compliance with the License. Copy of the License is
 * located in the file LICENSE.txt in the project distribution. You may also
 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 *
 * POLARION SOFTWARE MAKES NO REPRESENTATIONS OR WARRANTIES
 * ABOUT THE SUITABILITY OF THE SOFTWARE, EITHER EXPRESSED OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. POLARION SOFTWARE
 * SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT
 * OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */
package org.polarion.svnwebclient.web.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.polarion.svnwebclient.SVNWebClientException;
import org.polarion.svnwebclient.data.IDataProvider;
import org.polarion.svnwebclient.data.model.DataRepositoryElement;
import org.polarion.svnwebclient.util.UrlGenerator;
import org.polarion.svnwebclient.util.UrlGeneratorFactory;
import org.polarion.svnwebclient.util.UrlUtil;
import org.polarion.svnwebclient.web.resource.Actions;
import org.polarion.svnwebclient.web.resource.Links;
import org.polarion.svnwebclient.web.support.RequestHandler;
import org.polarion.svnwebclient.web.support.RequestParameters;

/**
 * 
 * @author <A HREF="mailto:[e-mail]">Polarion Software </A>
 */
public class ChangedResourceServlet extends AbstractServlet {
    private static final long serialVersionUID = -5619377681883035515L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.execute(request, response);
    }
    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.execute(request, response);
    }    
    
    protected void executeSVNOperation(IDataProvider dataProvider) throws SVNWebClientException {
        String url = this.requestHandler.getUrl();
        long revision = this.requestHandler.getRevision();
        String action = this.requestHandler.getAction();
        long startRevision;
        long endRevision;
        int type;
        
        if (Actions.ADD.equals(action) || Actions.REPLACE.equals(action)) {
            startRevision = -1;
            endRevision = revision;
            type = dataProvider.checkUrl(url, revision);
        } else if (Actions.DELETE.equals(action)) {
            endRevision = -1;
            DataRepositoryElement dataRepositoryElement = dataProvider.getInfo(url, revision - 1);
            startRevision = dataRepositoryElement.getRevision();
            if (dataRepositoryElement.isDirectory()) {
                type = IDataProvider.DIRECTORY;
            } else {
                type = IDataProvider.FILE;
            }
        } else {
            endRevision = revision;
            DataRepositoryElement dataRepositoryElement = dataProvider.getInfo(url, revision - 1);
            startRevision = dataRepositoryElement.getRevision();
            if (dataRepositoryElement.isDirectory()) {
                type = IDataProvider.DIRECTORY;
            } else {
                type = IDataProvider.FILE;
            }
        }

        UrlGenerator urlGenerator = null;
        if (type == IDataProvider.FILE) {
            urlGenerator = UrlGeneratorFactory.getUrlGenerator(Links.FILE_COMPARE, this.requestHandler.getLocation());
        } else if (type == IDataProvider.DIRECTORY) {
            urlGenerator = UrlGeneratorFactory.getUrlGenerator(Links.DIRECTORY_COMPARE, this.requestHandler.getLocation());
        }
        urlGenerator.addParameter(RequestParameters.URL, UrlUtil.encode(url));
        urlGenerator.addParameter(RequestParameters.PEGREV, Long.toString(revision));
        if (this.requestHandler.getCurrentRevision() != -1) {
            urlGenerator.addParameter(RequestParameters.CREV, Long.toString(this.requestHandler.getCurrentRevision()));            
        }
        urlGenerator.addParameter(RequestParameters.STARTREV, Long.toString(startRevision));
        urlGenerator.addParameter(RequestParameters.ENDREV, Long.toString(endRevision));
        
        this.redirect(urlGenerator.getUrl());
    }

    protected void redirect(String url) throws SVNWebClientException {
        try {
            this.state.getResponse().sendRedirect(url);
        } catch (Exception e) {
            throw new SVNWebClientException(e);
        }
    }
    
    protected RequestHandler getRequestHandler(HttpServletRequest request) {
        return new RequestHandler(request);
    }
}