/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.cdt.internal.core.search.indexing;

import org.eclipse.cdt.internal.core.Util;
import org.eclipse.cdt.internal.core.index.IIndex;
import org.eclipse.cdt.internal.core.search.processing.JobManager;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;

class AddFolderToIndex extends IndexRequest {
	IPath folderPath;
	IProject project;
	char[][] exclusionPattern;

	public AddFolderToIndex(IPath folderPath, IProject project, char[][] exclusionPattern, IndexManager manager) {
		super(project.getFullPath(), manager);
		this.folderPath = folderPath;
		this.project = project;
		this.exclusionPattern = exclusionPattern;
	}
	
	public boolean execute(IProgressMonitor progressMonitor) {
		if (progressMonitor != null && progressMonitor.isCanceled()) return true;
		if (!project.isAccessible()) return true; // nothing to do
		IResource folder = this.project.getParent().findMember(this.folderPath);
		if (folder == null || folder.getType() == IResource.FILE) return true; // nothing to do, source folder was removed

		/* ensure no concurrent write access to index */
		IIndex index = manager.getIndex(this.indexPath, true, /*reuse index file*/ true /*create if none*/);
		if (index == null) return true;
		ReadWriteMonitor monitor = manager.getMonitorFor(index);
		if (monitor == null) return true; // index got deleted since acquired

		try {
			monitor.enterRead(); // ask permission to read

			final IPath container = this.indexPath;
			final IndexManager indexManager = this.manager;
			final char[][] pattern = exclusionPattern;
			folder.accept(
				new IResourceProxyVisitor() {
					public boolean visit(IResourceProxy proxy) throws CoreException {
						switch(proxy.getType()) {
							case IResource.FILE :
//							TODO: BOG Put the file name checking back
								//if (Util.isJavaFileName(proxy.getName())) {
									IResource resource = proxy.requestResource();
									if (pattern == null || !Util.isExcluded(resource, pattern))
										indexManager.addSource((IFile)resource, container);
								//}
								//return false;
							case IResource.FOLDER :
								if (pattern != null && Util.isExcluded(proxy.requestResource(), pattern))
									return false;
						}
						return true;
					}
				},
				IResource.NONE
			);
		} catch (CoreException e) {
			if (IndexManager.VERBOSE) {
				JobManager.verbose("-> failed to add " + this.folderPath + " to index because of the following exception:"); //$NON-NLS-1$ //$NON-NLS-2$
				e.printStackTrace();
			}
			return false;
		} finally {
			monitor.exitRead(); // free read lock
		}
		return true;
	}
	
	public String toString() {
		return "adding " + this.folderPath + " to index " + this.indexPath; //$NON-NLS-1$ //$NON-NLS-2$
	}
}