PathUtils.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 2. 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.
 * 
 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
 * this acknowlegement may appear in the software itself, if and wherever such
 * third-party acknowlegements normally appear.
 * 
 * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or
 * promote products derived from this software without prior written permission.
 * For written permission, please contact andrus@objectstyle.org.
 * 
 * 5. Products derived from this software may not be called "ObjectStyle" nor
 * may "ObjectStyle" appear in their names without prior written permission of
 * the ObjectStyle Group.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
 * OBJECTSTYLE GROUP OR ITS 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.
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many individuals on
 * behalf of the ObjectStyle Group. For more information on the ObjectStyle
 * Group, please see <http://objectstyle.org/>.
 *  
 */
package org.objectstyle.wolips.eogenerator.core.model;

import java.io.File;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;

public class PathUtils {
	public static String getAbsolutePath(String path, File baseDir) {
		File absoluteFile = new File(path);
		if (!absoluteFile.isAbsolute() && baseDir != null) {
			absoluteFile = new File(baseDir, path);
		}
		return absoluteFile.getAbsolutePath();
	}
	
	public static String getRelativePath(IResource projectContext, IPath path) {
		IPath projectPath;
		if (projectContext == null) {
			projectPath = null;
		} else {
			projectPath = projectContext.getLocation();
		}
		return PathUtils.getRelativePath(projectPath, path);
	}

	public static String getRelativePath(IPath projectPath, IPath path) {
		String modelPathStr;
		if (projectPath != null && path.isAbsolute()) {
			if (projectPath.isPrefixOf(path)) {
				modelPathStr = path.removeFirstSegments(projectPath.segmentCount()).setDevice(null).toPortableString();
			} else {
				int matchingSegmentCount = projectPath.matchingFirstSegments(path);
				if (matchingSegmentCount == 0) {
					modelPathStr = path.toPortableString();
				} else {
					int relativePathSegmentCount = projectPath.segmentCount() - matchingSegmentCount;
					IPath relativeModelPath = new Path("");
					for (int i = 0; i < relativePathSegmentCount; i++) {
						relativeModelPath = relativeModelPath.append(".." + IPath.SEPARATOR);
					}
					relativeModelPath = relativeModelPath.append(path.removeFirstSegments(matchingSegmentCount));
					modelPathStr = relativeModelPath.toPortableString();
				}
			}
		} else {
			modelPathStr = path.toPortableString();
		}
		return modelPathStr;
	}
}