/*******************************************************************************
 * Copyright (c) 2006, 2009 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
 * Takuya Miyamoto - Adapted from org.eclipse.team.examples.filesystem / FileSystemMergeContext
 * David McKnight   (IBM)        - [272708] [import/export] fix various bugs with the synchronization support
 *******************************************************************************/
package org.eclipse.rse.internal.synchronize.filesystem.subscriber;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.team.core.diff.IDiff;
import org.eclipse.team.core.mapping.ISynchronizationScopeManager;
import org.eclipse.team.core.mapping.provider.ResourceDiffTree;
import org.eclipse.team.core.subscribers.SubscriberMergeContext;

/**
 * A merge context for merging file system changes.
 */
public class FileSystemMergeContext extends SubscriberMergeContext {

	/**
	 * Create the file system merge context for the given scope manager.
	 * 
	 * @param manager
	 * 		the scope manager
	 */
	public FileSystemMergeContext(ISynchronizationScopeManager manager) {
		super(FileSystemSubscriber.getInstance(), manager);
		initialize();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.team.core.mapping.provider.MergeContext#makeInSync(org.eclipse
	 * .team.core.diff.IDiff, org.eclipse.core.runtime.IProgressMonitor)
	 */
	@Override
	protected void makeInSync(IDiff diff, IProgressMonitor monitor) throws CoreException {
		IResource resource = ResourceDiffTree.getResourceFor(diff);
		FileSystemSubscriber.getInstance().makeInSync(resource);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.team.core.mapping.IMergeContext#markAsMerged(org.eclipse.
	 * team.core.diff.IDiff, boolean, org.eclipse.core.runtime.IProgressMonitor)
	 */
	public void markAsMerged(IDiff diff, boolean inSyncHint, IProgressMonitor monitor) throws CoreException {
		// TODO if inSyncHint is true, we should test to see if the contents
		// match
		IResource resource = ResourceDiffTree.getResourceFor(diff);
		FileSystemSubscriber.getInstance().markAsMerged(resource, monitor);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.team.core.mapping.IMergeContext#reject(org.eclipse.team.core
	 * .diff.IDiff, org.eclipse.core.runtime.IProgressMonitor)
	 */
	public void reject(IDiff diff, IProgressMonitor monitor) throws CoreException {
		markAsMerged(diff, false, monitor);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.team.core.mapping.provider.MergeContext#getMergeRule(org.
	 * eclipse.team.core.diff.IDiff)
	 */
	@Override
	public ISchedulingRule getMergeRule(IDiff node) {
		return ResourceDiffTree.getResourceFor(node).getProject();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.team.core.mapping.provider.MergeContext#merge(org.eclipse
	 * .team.core.diff.IDiff, boolean,
	 * org.eclipse.core.runtime.IProgressMonitor)
	 */
	@Override
	public IStatus merge(IDiff diff, boolean ignoreLocalChanges, IProgressMonitor monitor) throws CoreException {
		// Only attempt the merge for non-conflicts. The reason we do this
		// is because the file system provider doesn't really have the proper
		// base
		// so merging conflicts doesn't work properly
		/*
		if (!ignoreLocalChanges) {
			IResource resource = ResourceDiffTree.getResourceFor(diff);
			if (diff instanceof IThreeWayDiff && resource instanceof IFile) {
				IThreeWayDiff twd = (IThreeWayDiff) diff;
				if (twd.getDirection() == IThreeWayDiff.CONFLICTING) {
					// return new MergeStatus(FileSystemPlugin.ID,
					// "Cannot merge conflicting files", new IFile[] {
					// (IFile)resource });
					return new MergeStatus(RSESyncUtils.PLUGIN_ID, "Cannot merge conflicting files", new IFile[] { (IFile) resource });
				}
			}
		}
		*/
		return super.merge(diff, ignoreLocalChanges, monitor);
	}

}
