SaveContext.java

/*******************************************************************************
 * Copyright (c) 2000, 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
 *******************************************************************************/
package org.eclipse.core.internal.resources;

import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;

public class SaveContext implements ISaveContext {
	protected String pluginId;

	protected int kind;

	protected boolean needDelta;

	protected boolean needSaveNumber;

	protected SafeFileTable fileTable;

	protected int previousSaveNumber;

	protected IProject project;

	protected SaveContext(String pluginId, int kind, IProject project) throws CoreException {
		this.kind= kind;
		this.project= project;
		this.pluginId= pluginId;
		needDelta= false;
		needSaveNumber= false;
		fileTable= new SafeFileTable(pluginId);
		previousSaveNumber= getWorkspace().getSaveManager().getSaveNumber(pluginId);
	}

	public void commit() throws CoreException {
		if (needSaveNumber) {
			IPath oldLocation= getWorkspace().getMetaArea().getSafeTableLocationFor(pluginId);
			getWorkspace().getSaveManager().setSaveNumber(pluginId, getSaveNumber());
			fileTable.setLocation(getWorkspace().getMetaArea().getSafeTableLocationFor(pluginId));
			fileTable.save();
			oldLocation.toFile().delete();
		}
	}

	/**
	 * @see ISaveContext
	 */
	public IPath[] getFiles() {
		return getFileTable().getFiles();
	}

	protected SafeFileTable getFileTable() {
		return fileTable;
	}

	/**
	 * @see ISaveContext
	 */
	public int getKind() {
		return kind;
	}

	public String getPluginId() {
		return pluginId;
	}

	/**
	 * @see ISaveContext
	 */
	public int getPreviousSaveNumber() {
		return previousSaveNumber;
	}

	/**
	 * @see ISaveContext
	 */
	public IProject getProject() {
		return project;
	}

	/**
	 * @see ISaveContext
	 */
	public int getSaveNumber() {
		int result= getPreviousSaveNumber() + 1;
		return result > 0 ? result : 1;
	}

	protected Workspace getWorkspace() {
		return (Workspace)ResourcesPlugin.getWorkspace();
	}

	public boolean isDeltaNeeded() {
		return needDelta;
	}

	/**
	 * @see ISaveContext
	 */
	public IPath lookup(IPath file) {
		return getFileTable().lookup(file);
	}

	/**
	 * @see ISaveContext
	 */
	public void map(IPath file, IPath location) {
		getFileTable().map(file, location);
	}

	/**
	 * @see ISaveContext
	 */
	public void needDelta() {
		needDelta= true;
	}

	/**
	 * @see ISaveContext
	 */
	public void needSaveNumber() {
		needSaveNumber= true;
	}
}