XpandUtil.java

/*******************************************************************************
 * Copyright (c) 2005, 2009 committers of openArchitectureWare 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:
 *     committers of openArchitectureWare - initial API and implementation
 *******************************************************************************/
package org.eclipse.internal.xpand2;

import org.eclipse.internal.xtend.expression.parser.SyntaxConstants;

/**
 * Xpand utility class. Contains static helper methods and constants. 
 * @author Sven Efftinge (http://www.efftinge.de) *
 */
public final class XpandUtil {

	private static final String SLASH = "/";

	public static final String NS_DELIM = SyntaxConstants.NS_DELIM;

	public static final String TEMPLATE_EXTENSION = "xpt";

	public final static String getJavaResourceName(final String fqn) {
		return fqn.replaceAll(NS_DELIM, SLASH) + "." + TEMPLATE_EXTENSION;
	}

	/**
	 * Returns the name without its last segment.
	 * @param fqn Qualified name (foo::bar).
	 * @return <tt>fqn</tt> without the last segment. Returns <tt>null</tt> if <tt>fqn</tt> is null
	 * or the name does not contain a qualifier ('::').
	 */
	public static String withoutLastSegment(final String fqn) {
		if (fqn == null || fqn.lastIndexOf(SyntaxConstants.NS_DELIM) == -1)
			return null;
		return fqn.substring(0, fqn.lastIndexOf(SyntaxConstants.NS_DELIM));
	}

	/**
	 * Returns the last segment of a qualified name.
	 * @param fqn Qualified name (foo::bar).
	 * @return The last segment of <tt>fqn</tt>. Returns <tt>null</tt> if <tt>fqn</tt> is null.
	 * Returns <tt>fqn</tt> if the name does not contain a qualifier ('::'). 
	 */
	public static String getLastSegment(final String fqn) {
		if (fqn == null || fqn.lastIndexOf(SyntaxConstants.NS_DELIM) == -1)
			return fqn;
		return fqn.substring(fqn.lastIndexOf(SyntaxConstants.NS_DELIM) + SyntaxConstants.NS_DELIM.length());
	}

}