switchtoheadbean.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.controller;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.polarion.svnwebclient.data.DataProviderException;
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.SVNWebClientException;
import org.polarion.svnwebclient.web.model.Navigation;
import org.polarion.svnwebclient.web.model.data.SwitchToHead;
import org.polarion.svnwebclient.web.resource.Links;
import org.polarion.svnwebclient.web.support.RequestException;
import org.polarion.svnwebclient.web.support.AbstractRequestHandler;
import org.polarion.svnwebclient.web.support.RequestParameters;

/**
 * 
 * @author <A HREF="mailto:[e-mail]">Polarion Software </A>
 */
public class SwitchToHeadBean extends AbstractBean {
    protected long headRevision; 
    protected String originalUrl;
    protected String urlInRevision;
    protected String urlInHead; 
    protected boolean redirectToDirectory;
    protected DataRepositoryElement repositoryElement;
    
    public SwitchToHeadBean() {
    }
    
    protected boolean executeSVNOperation(IDataProvider dataProvider) throws SVNWebClientException {
        this.urlInHead = "";
        this.urlInRevision = "";
        
        this.headRevision = dataProvider.getHeadRevision();        
        this.originalUrl = this.requestHandler.getUrl();
        
        this.repositoryElement = dataProvider.getInfo(this.urlInRevision, this.requestHandler.getPegRevision());
        
        List pathChain = UrlUtil.getPathChain(this.originalUrl);
        boolean found = false;
        for (int i = pathChain.size() - 1; i >= 0; i--) {
            try {
                this.urlInRevision = (String) pathChain.get(i);                
                this.urlInHead = dataProvider.getLocation(this.urlInRevision, this.requestHandler.getPegRevision(), this.headRevision);
                found = true;
                break;
            } catch (DataProviderException e) {
                this.urlInHead = null;
                this.urlInRevision = null;
            }
        }
        
        if (this.originalUrl.equals(this.urlInRevision)) {
            DataRepositoryElement repositoryElement = dataProvider.getInfo(this.urlInHead, this.headRevision);
            if (repositoryElement.isDirectory()) {
                this.redirect(Links.DIRECTORY_CONTENT, this.urlInHead);
            } else {
                this.redirect(Links.FILE_CONTENT, this.urlInHead);
            }
            return false;            
        }
        
        if (found) {
            DataRepositoryElement repositoryElement = dataProvider.getInfo(this.urlInHead, this.headRevision);
            if (repositoryElement.isDirectory()) {
                this.redirectToDirectory = true;
            } else {
                this.redirectToDirectory = false;
            }            
        }
        return true;
    }

    protected void redirect(String base, String url) throws SVNWebClientException {
        try {
            UrlGenerator urlGenerator = UrlGeneratorFactory.getUrlGenerator(base, this.requestHandler.getLocation());
            urlGenerator.addParameter(RequestParameters.URL, UrlUtil.encode(url));
            this.state.getResponse().sendRedirect(urlGenerator.getUrl());
        } catch (Exception e) {
            throw new SVNWebClientException(e);
        }
    }
    
    protected AbstractRequestHandler getRequestHandler(HttpServletRequest request) {
        return new AbstractRequestHandler(request) {
            public void check() throws RequestException {
                this.checkLong(RequestParameters.PEGREV);
            }
        };

    }

    public SwitchToHead getSwitchToHead() {
    	SwitchToHead switchToHead = new SwitchToHead(this.requestHandler.getLocation(),
    			this.originalUrl, this.urlInRevision, this.urlInHead, this.redirectToDirectory);
    	switchToHead.setHeadRevision(this.headRevision);
    	switchToHead.setRevision(this.requestHandler.getPegRevision());
        return switchToHead;
    }
   
    public Navigation getNavigation() {
        return new Navigation(this.originalUrl, this.requestHandler.getLocation(),this.requestHandler.getPegRevision(), !this.repositoryElement.isDirectory());
    }

    public List getActions() {
        return null;
    }
}