/*******************************************************************************
 * Copyright (c) 2003, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jst.j2ee.internal.common;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.core.ClasspathEntry;
import org.eclipse.jem.util.logger.proxy.Logger;


/**
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class UpdateProjectClasspath {
	
 
	public UpdateProjectClasspath(String sourceFolder, String componentName, IProject jProject){
		addSrcFolderToProject(sourceFolder, componentName, jProject);
	}
	
	private IClasspathEntry[] getClasspathEntries(String sourceFolder, String componentName,
			IProject jProject) {
	
		ArrayList list = new ArrayList();
		list.add(JavaCore.newSourceEntry(jProject.getFullPath().append(sourceFolder)));
		
		IClasspathEntry[] classpath = new IClasspathEntry[list.size()];


        IPath newOutputPath = null;
        for (int i = 0; i < classpath.length; i++) {
			classpath[i] = (IClasspathEntry) list.get(i);
            newOutputPath = Path.fromOSString(Path.SEPARATOR +jProject.getName() + "/bin/");
            ((ClasspathEntry)classpath[i]).specificOutputLocation = newOutputPath;
		}
		return classpath;		
	}	
	
	private void addSrcFolderToProject(String sourceFolder,String componentName,
			IProject jProject) {
			
		IJavaProject javaProject = JavaCore.create( jProject );
		try {
	
			IClasspathEntry[] oldEntries = javaProject.getRawClasspath();
            List oldEntriesList,classpathList;
			IClasspathEntry[] newEntries = getClasspathEntries(sourceFolder, componentName, 
					jProject);
	         /**
	          * Warning clean-up 12/05/2005
	          */   
			//int oldSize = oldEntries.length;
			//int newSize = newEntries.length;
			
			classpathList = new ArrayList();
			oldEntriesList = Arrays.asList(oldEntries);
			classpathList.addAll(oldEntriesList);
			for( int j=0; j< newEntries.length; j++){
                if(!oldEntriesList.contains(newEntries[j])) {
                	classpathList.add(newEntries[j]);
                }
			}
			IClasspathEntry[] classpathEntries = (IClasspathEntry[]) classpathList.toArray(new IClasspathEntry[classpathList.size()]);
			javaProject.setRawClasspath(classpathEntries, null);
		}
		catch (JavaModelException e) {
			Logger.getLogger().logError(e);
		}
	}	

	private static IClasspathEntry[] getProjectDependency(IProject clientProj){
		IClasspathEntry projectEntry = JavaCore.newProjectEntry(clientProj.getFullPath(), true);
			return new IClasspathEntry[]{projectEntry};	
	}
	
	private static boolean entryToChange(final IClasspathEntry entry, final IClasspathEntry[] entriesToChange) {
		for (int i = 0; i < entriesToChange.length; i++) {
			if (entriesToChange[i].equals(entry)) {
				return true;
			}
		}
		return false;
	}	

}