builddeltavisitor.java

一个java写的business process management系统

/*
 * Copyright (c) 2003, Alexander Greif
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.designer.builder;

import net.orthanc.flow4j.designer.core.Flow4JPlugin;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;

/**
 * @author agreif
 *
 * TODO
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class BuildDeltaVisitor implements IResourceDeltaVisitor {

	private IProgressMonitor monitor;
	private FlowBuilder builder;
	
	/**
	 * TODO
	 * 
	 */
	public BuildDeltaVisitor(IProgressMonitor monitor, FlowBuilder builder) {
		super();
		this.monitor = monitor;
		this.builder = builder;
	}

	/**
	 * @see org.eclipse.core.resources.IResourceDeltaVisitor#visit(org.eclipse.core.resources.IResourceDelta)
	 * @return true if the resource delta's children should be visited; false if they should be skipped.
	 */
	public boolean visit(IResourceDelta delta) throws CoreException {
		IResource resource = delta.getResource();

		if (resource instanceof IProject) {
			// Only check projects with plugin nature
			IProject project = (IProject) resource;
			return FlowBuilder.isBuildableProject(project);
		}
		
		if (resource instanceof IFolder)
			return true;
			
		if (resource instanceof IFile) {
			// see if this is it
			IFile file = (IFile) resource;

			if (Flow4JPlugin.isFlowFile(file)) {
				// That's it, but only check it if it has been added or changed
				if (delta.getKind() != IResourceDelta.REMOVED) {
					builder.buildFlow(builder.getClasspathSrcFolder(file), file, monitor);
					return true;
				} else {
					removeOutputFile(file, monitor);
				}
			}
		}
		return false;
	}




	/**
	 * Removes the flow's java source file
	 * @param file the flow file
	 * @param monitor the progress monitor
	 */
	private void removeOutputFile(IFile file, IProgressMonitor monitor) {
		String className = file.getFullPath().removeFileExtension().lastSegment();
		//IPath javaFilePath = builder.getProject().getFolder(Flow4JPlugin.FOLDER_NAME_JAVA).getFullPath().removeFirstSegments(1)
		//						.append(file.getFullPath().removeFirstSegments(1));
		//javaFilePath = javaFilePath.removeLastSegments(1).append(className).addFileExtension("java");
		//IFile outputFile = builder.getProject().getFile(javaFilePath);	
		IFile outputFile = builder.getProject().getFile(file.getFullPath().removeFirstSegments(1).removeFileExtension().addFileExtension(Flow4JPlugin.JAVA_FILE_EXTENSION));	

		monitor.subTask("removing file " + outputFile.getName());
		try {
			outputFile.delete(true, true, monitor);
		} catch (CoreException e) {
			Flow4JPlugin.log(e);
		}
		monitor.done();
	}












}