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/**********************************************************************
* Copyright (c) 2007, 2011 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:
* Igor Fedorenko & Fabrizio Giustina - Initial API and implementation
**********************************************************************/
package org.eclipse.jst.server.tomcat.core.internal;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.StringTokenizer;
/**
* Utility methods for handling loaders in catalina.properties.
*/
public class CatalinaPropertiesUtil {
/**
* Don't instantiate
*/
private CatalinaPropertiesUtil() {
// unused
}
/**
* Adds a list of path elements to a specific loader in catalina.properties.
* This method doesn't use java.util.Properties in order to keep file
* formatting intact.
*
* @param file catalina.properties file
* @param loader loader name
* @param elements List of classpath elements
* @throws IOException
*/
public static void addGlobalClasspath(File file, String loader,
String[] elements) throws IOException {
String propertyName = loader + ".loader";
BufferedReader br = null;
StringBuffer buffer = new StringBuffer();
boolean added = false;
try {
br = new BufferedReader(new FileReader(file));
String line = br.readLine();
while (line != null) {
if (line.startsWith(propertyName)) {
added = true;
line = addElements(line, elements);
}
buffer.append(line);
buffer.append("\n");
line = br.readLine();
}
} finally {
if (br != null) {
br.close();
}
}
if (!added) {
// should never happen with an original catalina.properties,
// but better handle also files modified by users
buffer.append(propertyName);
buffer.append("=");
for (int i = 0; i < elements.length; i++) {
buffer.append(elements[i]);
}
buffer.append("\n");
}
String propertyFile = buffer.toString();
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new FileWriter(file));
bw.write(propertyFile);
} finally {
if (br != null) {
bw.close();
}
}
}
/**
* Append a list of path to the property at the given line and returns the
* modified name.
* @param line line (property=value)
* @param elements classpath elements to add.
* @return modified line
*/
private static String addElements(String line, String[] elements) {
String[] propAndValue = line.split("=");
String loaderProperty = "";
if (propAndValue.length > 1) {
loaderProperty = propAndValue[1];
}
Set<String> classpath = new LinkedHashSet<String>();
StringTokenizer st = new StringTokenizer(loaderProperty, ",");
while (st.hasMoreTokens()) {
classpath.add(st.nextToken());
}
for (int i = 0; i < elements.length; i++) {
classpath.add(elements[i]);
}
StringBuffer sb = new StringBuffer();
sb.append(propAndValue[0]);
sb.append("=");
for (Iterator it = classpath.iterator(); it.hasNext();) {
sb.append(it.next());
if (it.hasNext()) {
sb.append(',');
}
}
return sb.toString();
}
}
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