modules/fdbworkers/src/flash/tools/debugger/DefaultDebuggerCallbacks.java - flex-sdk - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package flash.tools.debugger;

 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.LineNumberReader;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 import flash.util.Trace;

 /**
  * @author mmorearty
  */
 public class DefaultDebuggerCallbacks implements IDebuggerCallbacks
 {
 	private boolean m_computedExeLocations;
 	private File m_httpExe;
 	private File m_playerExe;

 	private static final String UNIX_DEFAULT_BROWSER = "firefox"; //$NON-NLS-1$
 	private static final String UNIX_FLASH_PLAYER = "flashplayer"; //$NON-NLS-1$

 	private static final int WINDOWS = 0;
 	private static final int MAC = 1;
 	private static final int UNIX = 2;

 	// A pattern for a value that was output by reg.exe.  Warning,
 	// Windows XP and Windows Vista have different output; the following
 	// pattern needs to work for both.
 	private static final Pattern registryValuePattern = Pattern.compile("\\sREG_[^ \t]+\\s+(.*)$"); //$NON-NLS-1$

 	/**
 	 * Returns WINDOWS, MAC, or UNIX
 	 */
 	private static int getOS() {
 		String osName = System.getProperty("os.name").toLowerCase(); //$NON-NLS-1$
 		if (osName.startsWith("windows")) //$NON-NLS-1$
 			return WINDOWS;
 		else if (osName.startsWith("mac os x")) // as per http://developer.apple.com/technotes/tn2002/tn2110.html //$NON-NLS-1$
 			return MAC;
 		else
 			return UNIX;
 	}

 	/*
 	 * @see flash.tools.debugger.IDebuggerCallbacks#getHttpExe()
 	 */
 	public synchronized File getHttpExe()
 	{
 		if (!m_computedExeLocations)
 			recomputeExeLocations();
 		return m_httpExe;
 	}

 	/*
 	 * @see flash.tools.debugger.IDebuggerCallbacks#getPlayerExe()
 	 */
 	public synchronized File getPlayerExe()
 	{
 		if (!m_computedExeLocations)
 			recomputeExeLocations();
 		return m_playerExe;
 	}

 	/*
 	 * @see flash.tools.debugger.IDebuggerCallbacks#recomputeExeLocations()
 	 */
 	public synchronized void recomputeExeLocations()
 	{
 		int os = getOS();
 		if (os == WINDOWS)
 		{
 			m_httpExe = getDefaultWindowsBrowser();
 			m_playerExe = determineExeForType("ShockwaveFlash.ShockwaveFlash"); //$NON-NLS-1$
 		}
 		else if (os == MAC)
 		{
 			m_httpExe = null;
 			m_playerExe = null;
 		}
 		else // probably Unix
 		{
 			// "firefox" is default browser for unix
 			m_httpExe = findUnixProgram(UNIX_DEFAULT_BROWSER);

 			// "flashplayer" is standalone flash player on unix
 			m_playerExe = findUnixProgram(UNIX_FLASH_PLAYER);
 		}
 		m_computedExeLocations = true;
 	}

 	public String getHttpExeName()
 	{
 		if (getOS() == UNIX)
 			return UNIX_DEFAULT_BROWSER;
 		else
 			return Bootstrap.getLocalizationManager().getLocalizedTextString("webBrowserGenericName"); //$NON-NLS-1$
 	}

 	public String getPlayerExeName()
 	{
 		if (getOS() == UNIX)
 			return UNIX_FLASH_PLAYER;
 		else
 			return Bootstrap.getLocalizationManager().getLocalizedTextString("flashPlayerGenericName"); //$NON-NLS-1$
 	}

 	/**
 	 * Looks for a Unix program.  Checks the PATH, and if not found there,
 	 * checks the directory specified by the "application.home" Java property.
 	 * ("application.home" was set by the "fdb" shell script.)
 	 *
 	 * @param program program to find, e.g. "firefox"
 	 * @return path, or <code>null</code> if not found.
 	 */
 	private File findUnixProgram(String program)
 	{
 		String[] cmd = { "/bin/sh", "-c", "which " + program }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
 		try
 		{
 			Process process = Runtime.getRuntime().exec(cmd);
 			BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
 			String line = reader.readLine();
 			if (line != null)
 			{
 				File f = new File(line);
 				if (f.exists())
 				{
 					return f;
 				}
 			}

 			// Check in the Flex SDK's "bin" directory.  The "application.home"
 			// property is set by the "fdb" shell script.
 			String flexHome = System.getProperty("application.home"); //$NON-NLS-1$
 			if (flexHome != null)
 			{
 				File f = new File(flexHome, "bin/" + program); //$NON-NLS-1$
 				if (f.exists())
 				{
 					return f;
 				}
 			}
 		}
 		catch (IOException e)
 		{
 			// ignore
 		}
 		return null;
 	}

 	private File getDefaultWindowsBrowser() {
 		try {
 			String browser = null;

 			double osVersion;
 			try {
 				osVersion = Double.parseDouble(System.getProperty("os.version")); //$NON-NLS-1$
 			} catch (NumberFormatException e) {
 				osVersion = 0;
 			}

 			if (osVersion >= 6) { // Vista or higher
 				String progid = queryWindowsRegistry(
 					"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\Shell\\Associations\\UrlAssociations\\http\\UserChoice", //$NON-NLS-1$
 					"Progid"); //$NON-NLS-1$
 				if (progid != null) {
 					browser = getClassShellOpenCommand(progid);
 				}
 			}

 			if (browser == null) {
 				browser = getClassShellOpenCommand("http"); //$NON-NLS-1$
 			}

 			if (browser != null) {
 				browser = extractExenameFromCommandString(browser);
 				return new File(browser);
 			} else {
 				return null;
 			}
 		} catch (IOException e) {
 			return null;
 		}
 	}

 	private String getClassShellOpenCommand(String clazz) throws IOException {
 		return queryWindowsRegistry("HKEY_CLASSES_ROOT\\" + clazz + "\\shell\\open\\command", null); //$NON-NLS-1$ //$NON-NLS-2$
 	}

 	/**
 	 * Note, this function is Windows-specific.
 	 */
 	private File determineExeForType(String type)
 	{
 		String it = null;
 		try
 		{
 			String[] cmd = new String[] { "cmd", "/d", "/c", "ftype", type }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
 			Process p = Runtime.getRuntime().exec(cmd);
 			LineNumberReader lnr = new LineNumberReader(new InputStreamReader(p.getInputStream()));
 			String line = null;
 			type += "="; //$NON-NLS-1$
 			while( it == null && (line = lnr.readLine()) != null)
 			{
 				if (line.length() < type.length() ||
 					line.substring(0, type.length()).compareToIgnoreCase(type) == 0)
 				{
 					it = line;
 					break;
 				}
 			}
 			p.destroy();

 			// if we have one extract cmd = " "
 			if (it != null)
 			{
 				int equalSign = it.indexOf('=');
 				if (equalSign != -1)
 					it = it.substring(equalSign+1);

 				it = extractExenameFromCommandString(it);
 			}
 		}
 		catch (IOException e)
 		{
 			// means it didn't work
 		}

 		if (it != null)
 			return new File(it);
 		else
 			return null;
 	}

 	/**
 	 * Given a command string of the form
 	 * 		"path_to_exe" args
 	 * or
 	 * 		path_to_exe args
 	 *
 	 * return the path_to_exe.  Note that path_to_exe may contain spaces.
 	 */
 	protected String extractExenameFromCommandString(String cmd)
 	{
 		// now strip trailing junk if any
 		if (cmd.startsWith("\"")) { //$NON-NLS-1$
 			// ftype is enclosed in quotes
 			int closingQuote =  cmd.indexOf('"', 1);
 			if (closingQuote == -1)
 				closingQuote = cmd.length();
 			cmd = cmd.substring(1, closingQuote);
 		} else {
 			// Some ftypes don't use enclosing quotes.  This is tricky -- we have to
 			// scan through the string, stopping at each space and checking whether
 			// the filename up to that point refers to a valid filename.  For example,
 			// if the input string is
 			//
 			//     C:\Program Files\Macromedia\Flash 9\Players\SAFlashPlayer.exe %1
 			//
 			// then we need to stop at each space and see if that is an EXE name:
 			//
 			//     C:\Program.exe
 			//     C:\Program Files\Macromedia\Flash.exe
 			//     C:\Program Files\Macromedia\Flash 9\Players\SAFlashPlayer.exe

 			int endOfFilename = -1;
 			for (;;) {
 				int nextSpace = cmd.indexOf(' ', endOfFilename+1);
 				if (nextSpace == -1) {
 					endOfFilename = -1;
 					break;
 				}
 				String filename = cmd.substring(0, nextSpace);
 				if (!filename.toLowerCase().endsWith(".exe")) //$NON-NLS-1$
 					filename += ".exe"; //$NON-NLS-1$
 				if (new File(filename).exists()) {
 					endOfFilename = nextSpace;
 					break;
 				}
 				endOfFilename = nextSpace;
 			}
 			if (endOfFilename != -1 && endOfFilename < cmd.length())
 				cmd = cmd.substring(0, endOfFilename);
 		}
 		return cmd;
 	}

 	/*
 	 * @see flash.tools.debugger.IDebuggerCallbacks#launchDebugTarget(java.lang.String[])
 	 */
 	public Process launchDebugTarget(String[] cmd) throws IOException
 	{
 		return Runtime.getRuntime().exec(cmd);
 	}

 	@Override
 	public Process launchDebugTarget(String[] cmd, ILauncher launcher) throws IOException {
 		return launcher.launch(cmd);
 	}

 	/*
 	 * @see flash.tools.debugger.IDebuggerCallbacks#terminateDebugTarget(java.lang.Process)
 	 */
 	public void terminateDebugTarget(Process process) throws IOException
 	{
 		terminateDebugTarget(process, null);
 	}

 	@Override
 	public void terminateDebugTarget(Process process, ILauncher launcher) throws IOException {
 		if(null == launcher)
 		{
 			process.destroy();
 		}
 		else
 		{
 			launcher.terminate(process);
 		}

 	}

 	public String queryWindowsRegistry(String key, String value) throws IOException
 	{
 		return queryWindowsRegistry(key, value, 0);
 	}

 	/**
 	 * This implementation of queryWindowsRegistry() does not make any native
 	 * calls.  I had to do it this way because it is too hard, at this point,
 	 * to add native code to the Flex code tree.
 	 */
 	public String queryWindowsRegistry(String key, String value, int registryBitMode) throws IOException
 	{
 		Process p = null;
 		String result = null;

 		List<String> arguments = new ArrayList<String>(6);
 		arguments.add("reg.exe"); //$NON-NLS-1$
 		arguments.add("query"); //$NON-NLS-1$
 		arguments.add(key);
 		if (value == null || value.length() == 0)
 		{
 			arguments.add("/ve"); //$NON-NLS-1$
 		}
 		else
 		{
 			arguments.add("/v"); //$NON-NLS-1$
 			arguments.add(value);
 		}

 		// This line must not be in try/catch -- if it throws an exception,
 		// we want that to propagate out to our caller.
 		p = Runtime.getRuntime().exec(arguments.toArray(new String[arguments.size()]));

 		try
 		{
 			BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

 			String line;
 			while ((line = reader.readLine()) != null)
 			{
 				if (line.equalsIgnoreCase(key))
 				{
 					line = reader.readLine();
 					if (line != null)
 					{
 						Matcher matcher = registryValuePattern.matcher(line);
 						if (matcher.find()) {
 							result = matcher.group(1);
 						}
 					}
 					break;
 				}
 			}
 		}
 		catch (IOException e)
 		{
 			if (Trace.error)
 				e.printStackTrace();
 		}
 		finally
 		{
 			if (p != null)
 			{
 				p.destroy();
 				p = null;
 			}
 		}

 		return result;
 	}

 	/**
 	 * Default implementation does not know how to get the version
 	 * of an application.
 	 */
 	public int[] getAppVersion(File application) throws IOException {
 		return null;
 	}

 	/**
 	 * Default application does not have any extra arguments for the
 	 * browser.
 	 */
 	public String[] getBrowserParameters(String uri)
 	{
 		return null;
 	}
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You under the Apache License, Version 2.0
	* (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package flash.tools.debugger;

	import java.io.BufferedReader;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStreamReader;
	import java.io.LineNumberReader;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

	import flash.util.Trace;

	/**
	* @author mmorearty
	*/
	public class DefaultDebuggerCallbacks implements IDebuggerCallbacks
	{
	private boolean m_computedExeLocations;
	private File m_httpExe;
	private File m_playerExe;

	private static final String UNIX_DEFAULT_BROWSER = "firefox"; //$NON-NLS-1$
	private static final String UNIX_FLASH_PLAYER = "flashplayer"; //$NON-NLS-1$

	private static final int WINDOWS = 0;
	private static final int MAC = 1;
	private static final int UNIX = 2;

	// A pattern for a value that was output by reg.exe. Warning,
	// Windows XP and Windows Vista have different output; the following
	// pattern needs to work for both.
	private static final Pattern registryValuePattern = Pattern.compile("\\sREG_[^ \t]+\\s+(.*)$"); //$NON-NLS-1$

	/**
	* Returns WINDOWS, MAC, or UNIX
	*/
	private static int getOS() {
	String osName = System.getProperty("os.name").toLowerCase(); //$NON-NLS-1$
	if (osName.startsWith("windows")) //$NON-NLS-1$
	return WINDOWS;
	else if (osName.startsWith("mac os x")) // as per http://developer.apple.com/technotes/tn2002/tn2110.html //$NON-NLS-1$
	return MAC;
	else
	return UNIX;
	}

	/*
	* @see flash.tools.debugger.IDebuggerCallbacks#getHttpExe()
	*/
	public synchronized File getHttpExe()
	{
	if (!m_computedExeLocations)
	recomputeExeLocations();
	return m_httpExe;
	}

	/*
	* @see flash.tools.debugger.IDebuggerCallbacks#getPlayerExe()
	*/
	public synchronized File getPlayerExe()
	{
	if (!m_computedExeLocations)
	recomputeExeLocations();
	return m_playerExe;
	}

	/*
	* @see flash.tools.debugger.IDebuggerCallbacks#recomputeExeLocations()
	*/
	public synchronized void recomputeExeLocations()
	{
	int os = getOS();
	if (os == WINDOWS)
	{
	m_httpExe = getDefaultWindowsBrowser();
	m_playerExe = determineExeForType("ShockwaveFlash.ShockwaveFlash"); //$NON-NLS-1$
	}
	else if (os == MAC)
	{
	m_httpExe = null;
	m_playerExe = null;
	}
	else // probably Unix
	{
	// "firefox" is default browser for unix
	m_httpExe = findUnixProgram(UNIX_DEFAULT_BROWSER);

	// "flashplayer" is standalone flash player on unix
	m_playerExe = findUnixProgram(UNIX_FLASH_PLAYER);
	}
	m_computedExeLocations = true;
	}

	public String getHttpExeName()
	{
	if (getOS() == UNIX)
	return UNIX_DEFAULT_BROWSER;
	else
	return Bootstrap.getLocalizationManager().getLocalizedTextString("webBrowserGenericName"); //$NON-NLS-1$
	}

	public String getPlayerExeName()
	{
	if (getOS() == UNIX)
	return UNIX_FLASH_PLAYER;
	else
	return Bootstrap.getLocalizationManager().getLocalizedTextString("flashPlayerGenericName"); //$NON-NLS-1$
	}

	/**
	* Looks for a Unix program. Checks the PATH, and if not found there,
	* checks the directory specified by the "application.home" Java property.
	* ("application.home" was set by the "fdb" shell script.)
	*
	* @param program program to find, e.g. "firefox"
	* @return path, or <code>null</code> if not found.
	*/
	private File findUnixProgram(String program)
	{
	String[] cmd = { "/bin/sh", "-c", "which " + program }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	try
	{
	Process process = Runtime.getRuntime().exec(cmd);
	BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
	String line = reader.readLine();
	if (line != null)
	{
	File f = new File(line);
	if (f.exists())
	{
	return f;
	}
	}

	// Check in the Flex SDK's "bin" directory. The "application.home"
	// property is set by the "fdb" shell script.
	String flexHome = System.getProperty("application.home"); //$NON-NLS-1$
	if (flexHome != null)
	{
	File f = new File(flexHome, "bin/" + program); //$NON-NLS-1$
	if (f.exists())
	{
	return f;
	}
	}
	}
	catch (IOException e)
	{
	// ignore
	}
	return null;
	}

	private File getDefaultWindowsBrowser() {
	try {
	String browser = null;

	double osVersion;
	try {
	osVersion = Double.parseDouble(System.getProperty("os.version")); //$NON-NLS-1$
	} catch (NumberFormatException e) {
	osVersion = 0;
	}

	if (osVersion >= 6) { // Vista or higher
	String progid = queryWindowsRegistry(
	"HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\Shell\\Associations\\UrlAssociations\\http\\UserChoice", //$NON-NLS-1$
	"Progid"); //$NON-NLS-1$
	if (progid != null) {
	browser = getClassShellOpenCommand(progid);
	}
	}

	if (browser == null) {
	browser = getClassShellOpenCommand("http"); //$NON-NLS-1$
	}

	if (browser != null) {
	browser = extractExenameFromCommandString(browser);
	return new File(browser);
	} else {
	return null;
	}
	} catch (IOException e) {
	return null;
	}
	}

	private String getClassShellOpenCommand(String clazz) throws IOException {
	return queryWindowsRegistry("HKEY_CLASSES_ROOT\\" + clazz + "\\shell\\open\\command", null); //$NON-NLS-1$ //$NON-NLS-2$
	}

	/**
	* Note, this function is Windows-specific.
	*/
	private File determineExeForType(String type)
	{
	String it = null;
	try
	{
	String[] cmd = new String[] { "cmd", "/d", "/c", "ftype", type }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
	Process p = Runtime.getRuntime().exec(cmd);
	LineNumberReader lnr = new LineNumberReader(new InputStreamReader(p.getInputStream()));
	String line = null;
	type += "="; //$NON-NLS-1$
	while( it == null && (line = lnr.readLine()) != null)
	{
	if (line.length() < type.length() \|\|
	line.substring(0, type.length()).compareToIgnoreCase(type) == 0)
	{
	it = line;
	break;
	}
	}
	p.destroy();

	// if we have one extract cmd = " "
	if (it != null)
	{
	int equalSign = it.indexOf('=');
	if (equalSign != -1)
	it = it.substring(equalSign+1);

	it = extractExenameFromCommandString(it);
	}
	}
	catch (IOException e)
	{
	// means it didn't work
	}

	if (it != null)
	return new File(it);
	else
	return null;
	}

	/**
	* Given a command string of the form
	* "path_to_exe" args
	* or
	* path_to_exe args
	*
	* return the path_to_exe. Note that path_to_exe may contain spaces.
	*/
	protected String extractExenameFromCommandString(String cmd)
	{
	// now strip trailing junk if any
	if (cmd.startsWith("\"")) { //$NON-NLS-1$
	// ftype is enclosed in quotes
	int closingQuote = cmd.indexOf('"', 1);
	if (closingQuote == -1)
	closingQuote = cmd.length();
	cmd = cmd.substring(1, closingQuote);
	} else {
	// Some ftypes don't use enclosing quotes. This is tricky -- we have to
	// scan through the string, stopping at each space and checking whether
	// the filename up to that point refers to a valid filename. For example,
	// if the input string is
	//
	// C:\Program Files\Macromedia\Flash 9\Players\SAFlashPlayer.exe %1
	//
	// then we need to stop at each space and see if that is an EXE name:
	//
	// C:\Program.exe
	// C:\Program Files\Macromedia\Flash.exe
	// C:\Program Files\Macromedia\Flash 9\Players\SAFlashPlayer.exe

	int endOfFilename = -1;
	for (;;) {
	int nextSpace = cmd.indexOf(' ', endOfFilename+1);
	if (nextSpace == -1) {
	endOfFilename = -1;
	break;
	}
	String filename = cmd.substring(0, nextSpace);
	if (!filename.toLowerCase().endsWith(".exe")) //$NON-NLS-1$
	filename += ".exe"; //$NON-NLS-1$
	if (new File(filename).exists()) {
	endOfFilename = nextSpace;
	break;
	}
	endOfFilename = nextSpace;
	}
	if (endOfFilename != -1 && endOfFilename < cmd.length())
	cmd = cmd.substring(0, endOfFilename);
	}
	return cmd;
	}

	/*
	* @see flash.tools.debugger.IDebuggerCallbacks#launchDebugTarget(java.lang.String[])
	*/
	public Process launchDebugTarget(String[] cmd) throws IOException
	{
	return Runtime.getRuntime().exec(cmd);
	}

	@Override
	public Process launchDebugTarget(String[] cmd, ILauncher launcher) throws IOException {
	return launcher.launch(cmd);
	}

	/*
	* @see flash.tools.debugger.IDebuggerCallbacks#terminateDebugTarget(java.lang.Process)
	*/
	public void terminateDebugTarget(Process process) throws IOException
	{
	terminateDebugTarget(process, null);
	}

	@Override
	public void terminateDebugTarget(Process process, ILauncher launcher) throws IOException {
	if(null == launcher)
	{
	process.destroy();
	}
	else
	{
	launcher.terminate(process);
	}

	}

	public String queryWindowsRegistry(String key, String value) throws IOException
	{
	return queryWindowsRegistry(key, value, 0);
	}

	/**
	* This implementation of queryWindowsRegistry() does not make any native
	* calls. I had to do it this way because it is too hard, at this point,
	* to add native code to the Flex code tree.
	*/
	public String queryWindowsRegistry(String key, String value, int registryBitMode) throws IOException
	{
	Process p = null;
	String result = null;

	List<String> arguments = new ArrayList<String>(6);
	arguments.add("reg.exe"); //$NON-NLS-1$
	arguments.add("query"); //$NON-NLS-1$
	arguments.add(key);
	if (value == null \|\| value.length() == 0)
	{
	arguments.add("/ve"); //$NON-NLS-1$
	}
	else
	{
	arguments.add("/v"); //$NON-NLS-1$
	arguments.add(value);
	}

	// This line must not be in try/catch -- if it throws an exception,
	// we want that to propagate out to our caller.
	p = Runtime.getRuntime().exec(arguments.toArray(new String[arguments.size()]));

	try
	{
	BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

	String line;
	while ((line = reader.readLine()) != null)
	{
	if (line.equalsIgnoreCase(key))
	{
	line = reader.readLine();
	if (line != null)
	{
	Matcher matcher = registryValuePattern.matcher(line);
	if (matcher.find()) {
	result = matcher.group(1);
	}
	}
	break;
	}
	}
	}
	catch (IOException e)
	{
	if (Trace.error)
	e.printStackTrace();
	}
	finally
	{
	if (p != null)
	{
	p.destroy();
	p = null;
	}
	}

	return result;
	}

	/**
	* Default implementation does not know how to get the version
	* of an application.
	*/
	public int[] getAppVersion(File application) throws IOException {
	return null;
	}

	/**
	* Default application does not have any extra arguments for the
	* browser.
	*/
	public String[] getBrowserParameters(String uri)
	{
	return null;
	}
	}