org.eclipse.jst.server.jetty.core/src/org/eclipse/jst/server/jetty/core/internal/config/StartConfig.java

/*******************************************************************************
 * Copyright (c) 2010 Angelo Zerr 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:
 *     Angelo Zerr <angelo.zerr@gmail.com> - Initial API and implementation 
 *******************************************************************************/
package org.eclipse.jst.server.jetty.core.internal.config;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.util.zip.ZipException;

import org.eclipse.jst.server.jetty.core.internal.util.IOUtils;

public class StartConfig {

	public static InputStream getInputStream(File startJARFile)
			throws ZipException, IOException {
		// Load start.config from the start.jar coming from the Jetty serveur
		// install
		InputStream stream = IOUtils.getInputStream(startJARFile,
				"org/eclipse/jetty/start/start.config");

		// Read start.config to preprocess the content to :
		// 1) add jetty.home/=$(jetty.home)
		// 2) comments the whole jetty.home= declaration
		// 3) replace for the JAR lib 'jetty.home' to 'install.jetty.home'
		// 4) add JSP support if needed

		boolean hasJSPModule = false;

		InputStreamReader input = new InputStreamReader(stream);
		BufferedReader reader = new BufferedReader(input);
		StringWriter newContent = new StringWriter();

		// 1) add jetty.home/=$(jetty.home)
		newContent.append("jetty.home/=$(jetty.home)");
		newContent.append('\n');
		for (String line = reader.readLine(); line != null; line = reader
				.readLine()) {

			if (line.startsWith("jetty.home")) {
				// 2) comments the whole jetty.home= declaration
				line = "#" + line;
			} else {
				// 3) replace for the JAR lib 'jetty.home' to
				// 'install.jetty.home'
				if (line.indexOf("$(jetty.home)") != -1) {
					if (line.indexOf("/lib/") != -1
							|| line.indexOf(".jar") != -1) {
						line = line.replaceAll("jetty.home",
								"install.jetty.home");
					}
				}
				hasJSPModule = line.startsWith("[jsp]");
			}
			newContent.append(line);
			newContent.append('\n');
		}

		// 4) add JSP support if needed
		if (!hasJSPModule) {
			newContent.append("# Add jsp");
			newContent.append('\n');
			newContent.append("[jsp]");
			newContent.append('\n');
			newContent.append("$(install.jetty.home)/lib/jsp/**");
			newContent.append('\n');
		}
		return IOUtils.toInputStream(newContent.toString(), "UTF-8");
	}

}