colondelimitedproperties.java

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/**
 * Copyright (c) 2003-2005 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.core.internal.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;

/**
 * A special Properties subclass that reads and writes using ':' instead of '='
 * for the key/value separator.
 * <p />
 * Copyright (c) 2003-2005 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.8 $
 * <br>
 * $Date: 2007/01/20 22:25:49 $
 * <br>
 * @author Craig Setera
 */
public class ColonDelimitedProperties extends Properties {

	/**
	 * Creates an empty property list with no default values.
	 */
	public ColonDelimitedProperties() {
		super();
	}

	/**
	 * Creates a property list with the specified defaults.
	 *
	 * @param   defaults   the defaults.
	 */
	public ColonDelimitedProperties(Properties defaults) {
		super(defaults);
	}

	/**
	 * @see java.util.Properties#load(java.io.InputStream)
	 */
	public synchronized void load(InputStream inStream) throws IOException {
		Reader dataReader = new InputStreamReader(inStream, "UTF-8");
		load(dataReader);
	}

	/**
	 * Load the colon-delimited properties from the specified
	 * Reader.
	 * 
	 * @param reader the reader containing the properties
	 * @throws IOException if an error occurs loading the properties
	 */
	public synchronized void load(Reader reader)
		throws IOException
	{
		BufferedReader bufferedReader = new BufferedReader(reader);
		
		try {
			String line = null;
			while ((line = bufferedReader.readLine()) != null) {
				// Find the first colon and break the string up
				line = line.trim();
				if ((line.length() > 0) && !line.startsWith("#")) {
					int colonIndex = line.indexOf(':');
					if (colonIndex != -1) {
						String name = line.substring(0, colonIndex);
						if (colonIndex + 1 < line.length()) {
							String value = line.substring(colonIndex + 1).trim();
							setProperty(name, value);
						}
					}
				}
			}
		} finally {
			try { bufferedReader.close(); } catch (IOException e) {}
		}
	}
	
	/**
	 * @see java.util.Properties#store(java.io.OutputStream, java.lang.String)
	 */
	public synchronized void store(OutputStream out, String header)
		throws IOException 
	{
		OutputStreamWriter osw = new OutputStreamWriter(out, "UTF-8");
		PrintWriter writer = new PrintWriter(osw);
		
		// Maintain the JAD file in sorted by keys order
		List keys = new ArrayList(keySet());
		Collections.sort(keys);
		
		Iterator iter = keys.iterator();
		while (iter.hasNext()) {
			String key = (String) iter.next();
			String value = getProperty(key);
			writer.println(key + ": " + value);
		}
		
		writer.flush();
	}
}