deleteactionservlet.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 java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.polarion.svnwebclient.SVNWebClientException;
import org.polarion.svnwebclient.data.AuthenticationException;
import org.polarion.svnwebclient.data.DataProviderException;
import org.polarion.svnwebclient.data.IDataProvider;
import org.polarion.svnwebclient.data.model.DataChangedElement;
import org.polarion.svnwebclient.web.AttributeStorage;
import org.polarion.svnwebclient.web.controller.ChangeConfirmation;
import org.polarion.svnwebclient.web.model.Navigation;
import org.polarion.svnwebclient.web.model.data.ChangeResult;
import org.polarion.svnwebclient.web.resource.Links;
import org.polarion.svnwebclient.web.support.FormParameters;
import org.polarion.svnwebclient.web.support.RequestHandler;

/**
 * 
 * @author <A HREF="mailto:[e-mail]">Polarion Software </A>
 */
public class DeleteActionServlet extends AbstractServlet {
    protected static final long CURRENT_REVISION = -1;
    public static final String DELETED_ELEMENTS = "deletedelements";
    
    private static final long serialVersionUID = 3790513931839705409L;
    
    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 comment = this.state.getRequest().getParameter(FormParameters.COMMENT);        
        List deletedElements = (List) this.state.getRequest().getSession().getAttribute(DeleteActionServlet.DELETED_ELEMENTS);        
                
        if (comment == null) {                	
        	comment = (String)AttributeStorage.getInstance().getParameter(this.state.getRequest().getSession(),
        			FormParameters.COMMENT);
        } else {
        	 AttributeStorage.getInstance().addParameter(this.state.getRequest().getSession(), FormParameters.COMMENT, comment);
        }       	
                
        ChangeResult changeResult = null;        
        Navigation navigation = new Navigation(this.requestHandler.getUrl(), this.requestHandler.getLocation(),DeleteActionServlet.CURRENT_REVISION, false);        
        try {
            DataChangedElement changedElement = dataProvider.delete(this.requestHandler.getUrl(), deletedElements, comment);
            List elements = new ArrayList();
            ChangeResult.Element element = new ChangeResult.Element();
            String elementName = changedElement.getName();
            if (elementName.length() == 0) {
                elementName = Navigation.REPOSITORY;
            }
            element.setName(elementName);            
            element.setAuthor(changedElement.getAuthor());
            element.setComment(changedElement.getComment());
            element.setDate(changedElement.getDate());
            element.setDirectory(true);
            element.setRevision(changedElement.getRevision());
            elements.add(element);
            String message = "Elements were succesfully deleted";
            changeResult = new ChangeResult(true, message, elements, navigation);
        } catch (AuthenticationException ae) {
        	throw ae;
        } catch (DataProviderException e) {
        	AttributeStorage.getInstance().cleanSession(this.state.getRequest().getSession());
        	this.state.getRequest().getSession().removeAttribute(DeleteActionServlet.DELETED_ELEMENTS);
            throw new SVNWebClientException("Delete was failed", e); 
        }
        
        AttributeStorage.getInstance().cleanSession(this.state.getRequest().getSession());
        this.state.getRequest().getSession().removeAttribute(DeleteActionServlet.DELETED_ELEMENTS);
        this.state.getRequest().getSession().setAttribute(ChangeConfirmation.CHANGE_RESULT, changeResult);
        RequestDispatcher dispatcher = this.state.getRequest().getRequestDispatcher(Links.CHANGE_CONFIRMATION);
        try {
            dispatcher.forward(this.state.getRequest(), this.state.getResponse());
        } catch (Exception e) {
            throw new SVNWebClientException(e);
        }
    }

    protected RequestHandler getRequestHandler(HttpServletRequest request) {
        return new RequestHandler(request);
    }
}