ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/model/AntUtil.java - platform/eclipse.platform - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ant.internal.ui.model;


 import java.io.File;
 import java.net.URL;
 import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.StringTokenizer;

 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.util.FileUtils;
 import org.eclipse.ant.core.AntCorePlugin;
 import org.eclipse.ant.core.AntCorePreferences;
 import org.eclipse.ant.core.AntRunner;
 import org.eclipse.ant.core.IAntClasspathEntry;
 import org.eclipse.ant.core.TargetInfo;
 import org.eclipse.ant.internal.core.AntClasspathEntry;
 import org.eclipse.ant.internal.ui.launchConfigurations.IAntLaunchConfigurationConstants;
 import org.eclipse.ant.internal.ui.views.AntView;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.variables.VariablesPlugin;
 import org.eclipse.debug.core.ILaunchConfiguration;
 import org.eclipse.debug.ui.console.FileLink;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.PlatformUI;

 /**
  * General utility class dealing with Ant build files
  */
 public final class AntUtil {
 	public static final String ATTRIBUTE_SEPARATOR = ","; //$NON-NLS-1$;
 	public static final char ANT_CLASSPATH_DELIMITER= '*';
 	public static final String ANT_HOME_CLASSPATH_PLACEHOLDER= "G"; //$NON-NLS-1$
 	public static final String ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER= "UG"; //$NON-NLS-1$
 	/**
 	 * No instances allowed
 	 */
 	private AntUtil() {
 		super();
 	}

 	/**
 	 * Returns a single-string of the strings for storage.
 	 *
 	 * @param strings the array of strings
 	 * @return a single-string representation of the strings or
 	 * <code>null</code> if the array is empty.
 	 */
 	public static String combineStrings(String[] strings) {
 		if (strings.length == 0)
 			return null;

 		if (strings.length == 1)
 			return strings[0];

 		StringBuffer buf = new StringBuffer();
 		for (int i = 0; i < strings.length - 1; i++) {
 			buf.append(strings[i]);
 			buf.append(ATTRIBUTE_SEPARATOR);
 		}
 		buf.append(strings[strings.length - 1]);
 		return buf.toString();
 	}

 	/**
 	 * Returns an array of targets to be run, or <code>null</code> if none are
 	 * specified (indicating the default target should be run).
 	 *
 	 * @param configuration launch configuration
 	 * @return array of target names, or <code>null</code>
 	 * @throws CoreException if unable to access the associated attribute
 	 */
 	public static String[] getTargetsFromConfig(ILaunchConfiguration configuration) throws CoreException {
 		String attribute = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_TARGETS, (String) null);
 		if (attribute == null) {
 			return null;
 		} else {
 			return AntUtil.parseRunTargets(attribute);
 		}
 	}

 	/**
 	 * Returns a map of properties to be defined for the build, or
 	 * <code>null</code> if none are specified (indicating no additional
 	 * properties specified for the build).
 	 *
 	 * @param configuration launch configuration
 	 * @return map of properties (name --> value), or <code>null</code>
 	 * @throws CoreException if unable to access the associated attribute
 	 */
 	public static Map getProperties(ILaunchConfiguration configuration) throws CoreException {
 		Map map = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_PROPERTIES, (Map) null);
 		return map;
 	}

 	/**
 	 * Returns a String specifying the Ant home to use for the build, or
 	 * <code>null</code> if none is specified.
 	 *
 	 * @param configuration launch configuration
 	 * @return String specifying Ant home to use, or <code>null</code>
 	 * @throws CoreException if unable to access the associated attribute
 	 */
 	public static String getAntHome(ILaunchConfiguration configuration) throws CoreException {
 		return configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_HOME, (String) null);
 	}

 	/**
 	 * Returns an array of property files to be used for the build, or
 	 * <code>null</code> if none are specified (indicating no additional
 	 * property files specified for the build).
 	 *
 	 * @param configuration launch configuration
 	 * @return array of property file names, or <code>null</code>
 	 * @throws CoreException if unable to access the associated attribute
 	 */
 	public static String[] getPropertyFiles(ILaunchConfiguration configuration) throws CoreException {
 		String attribute = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_PROPERTY_FILES, (String) null);
 		if (attribute == null) {
 			return null;
 		} else {
 			String[] propertyFiles= AntUtil.parseString(attribute, ","); //$NON-NLS-1$
 			for (int i = 0; i < propertyFiles.length; i++) {
 				String propertyFile = propertyFiles[i];
 				propertyFile= expandVariableString(propertyFile, AntUIModelMessages.getString("AntUtil.6")); //$NON-NLS-1$ //$NON-NLS-2$
 				propertyFiles[i]= propertyFile;
 			}
 			return propertyFiles;
 		}
 	}

 	/**
 	 * Returns the list of all targets for the Ant build file specified by
 	 * the provided IPath, or <code>null</code> if no targets found.
 	 *
 	 * @param path the location of the Ant build file to get the targets from
 	 * @return a list of <code>TargetInfo</code>
 	 *
 	 * @throws CoreException if file does not exist, IO problems, or invalid format.
 	 */
 	public static TargetInfo[] getTargets(String path) throws CoreException {
 		AntRunner runner = new AntRunner();
 		runner.setBuildFileLocation(path);
 	 	return runner.getAvailableTargets();
 	}

 	/**
 	 * Returns the list of all targets for the Ant build file specified by
 	 * the provided IPath, arguments and ILaunchConfiguration, or <code>null</code> if no targets found.
 	 *
 	 * @param path the location of the Ant build file to get the targets from
 	 * @param arguments command line arguments for the Ant build
 	 * @param config the launch configuration for the Ant build
 	 * @return a list of <code>TargetInfo</code>
 	 *
 	 * @throws CoreException if file does not exist, IO problems, or invalid format.
 	 */
 	public static TargetInfo[] getTargets(String path, String[] arguments, ILaunchConfiguration config) throws CoreException {
 		Map properties=getProperties(config);
 		String[] propertyFiles= getPropertyFiles(config);
 		AntRunner runner = new AntRunner();
 		runner.setBuildFileLocation(path);
 		if (properties != null){
 			runner.addUserProperties(properties);
 		}
 		if (propertyFiles != null && propertyFiles.length > 0) {
 			runner.setPropertyFiles(propertyFiles);
 		}
 		if (arguments != null && arguments.length > 0) {
 			runner.setArguments(arguments);
 		}
 		runner.setCustomClasspath(getCustomClasspath(config));

 		String antHome= getAntHome(config);
 		if (antHome != null) {
 			runner.setAntHome(antHome);
 		}
 		return runner.getAvailableTargets();
 	}

 	/**
 	 * Returns the list of urls that define the custom classpath for the Ant
 	 * build, or <code>null</code> if the global classpath is to be used.
 	 *
 	 * @param config launch configuration
 	 * @return a list of <code>URL</code>
 	 *
 	 * @throws CoreException if file does not exist, IO problems, or invalid format.
 	 */
 	public static URL[] getCustomClasspath(ILaunchConfiguration config) throws CoreException {
 		String classpathString= config.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_CUSTOM_CLASSPATH, (String)null);
 		if (classpathString == null) {
 			return null;
 		}

 		List antEntries= new ArrayList();
 		List additionalEntries= new ArrayList();
 		if (classpathString.equals(ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER + AntUtil.ATTRIBUTE_SEPARATOR + ANT_HOME_CLASSPATH_PLACEHOLDER )) {
 			//really the default classpath ..just ordered differently
 			antEntries.addAll(Arrays.asList(AntCorePlugin.getPlugin().getPreferences().getAdditionalClasspathEntries()));
 			antEntries.addAll(Arrays.asList(AntCorePlugin.getPlugin().getPreferences().getAntHomeClasspathEntries()));
 		} else {
 			getCustomClasspaths(config, antEntries, additionalEntries);
 			antEntries.addAll(additionalEntries);
 		}

 		Iterator iter= antEntries.iterator();
 		URL[] urls= new URL[antEntries.size()];
 		int i= 0;
 		while (iter.hasNext()) {
 			IAntClasspathEntry entry = (IAntClasspathEntry) iter.next();
 			urls[i]= entry.getEntryURL();
 			i++;
 		}
 		return urls;

 	}

 	/**
 	 * Adds the Ant home entries and additional entries to the provided lists.
 	 * If no custom classpath is set, no entries are added to the lists.
 	 *
 	 * @param config launch configuration
 	 * @param antHomeEntries list to add the Ant home entries to
 	 * @param additionalEntries list to add the additional entries to
 	 *
 	 */
 	public static void getCustomClasspaths(ILaunchConfiguration config, List antHomeEntries, List additionalEntries) {
 		String classpathString= null;
 		try {
 			classpathString = config.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_CUSTOM_CLASSPATH, (String) null);
 		} catch (CoreException e) {
 		}
 		if (classpathString == null) {
 			return;
 		}
 		String antString= null;
 		String userString= null;
 		int delim= classpathString.indexOf(ANT_CLASSPATH_DELIMITER);

 		if (delim == -1) {
 			antString= classpathString;
 		} else {
 			antString= classpathString.substring(0, delim);
 			userString= classpathString.substring(delim+1);
 		}

 		getEntries(antHomeEntries, antString);

 		if (userString != null) {
 			getEntries(additionalEntries, userString);
 		}
 	}

 	private static void getEntries(List entries, String urlString) {
 		String[] entryStrings= AntUtil.parseString(urlString, AntUtil.ATTRIBUTE_SEPARATOR);
 		AntCorePreferences prefs= AntCorePlugin.getPlugin().getPreferences();
 		for (int i = 0; i < entryStrings.length; i++) {
 			String string = entryStrings[i];
 			if (string.equals(ANT_HOME_CLASSPATH_PLACEHOLDER)) {
 				entries.addAll(Arrays.asList(prefs.getAntHomeClasspathEntries()));
 			} else if (string.equals(ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER)) {
 				entries.addAll(Arrays.asList(prefs.getAdditionalClasspathEntries()));
 			} else {
 				if (string.charAt(0) == '?') {
 					string= string.substring(1);
 				}
 				entries.add(new AntClasspathEntry(string));
 			}
 		}
 	}

 	private static String expandVariableString(String variableString, String invalidMessage) throws CoreException {
 		String expandedString = VariablesPlugin.getDefault().getStringVariableManager().performStringSubstitution(variableString);
 		if (expandedString == null || expandedString.length() == 0) {
 			String msg = MessageFormat.format(invalidMessage, new String[] {variableString});
 			throw new CoreException(new Status(IStatus.ERROR, IAntUIConstants.PLUGIN_ID, 0, msg, null));
 		} else {
 			variableString= expandedString;
 		}
 		return variableString;
 	}

 	/**
 	 * Returns the currently displayed Ant View if it is open.
 	 *
 	 * @return the Ant View open in the current workbench page or
 	 * <code>null</code> if there is none.
 	 */
 	public static AntView getAntView() {
 		IWorkbenchWindow window= PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 		if (window != null) {
 			IWorkbenchPage page= window.getActivePage();
 			if (page != null) {
 				return (AntView) page.findView(IAntUIConstants.ANT_VIEW_ID);
 			}
 		}
 		return null;
 	}

 	/**
 	 * Returns the list of target names to run
 	 *
 	 * @param extraAttibuteValue the external tool's extra attribute value
 	 * 		for the run targets key.
 	 * @return a list of target names
 	 */
 	public static String[] parseRunTargets(String extraAttibuteValue) {
 		return parseString(extraAttibuteValue, ATTRIBUTE_SEPARATOR);
 	}

 	/**
 	 * Returns the list of Strings that were delimiter separated.
 	 *
 	 * @param delimString the String to be tokenized based on the delimiter
 	 * @return a list of Strings
 	 */
 	public static String[] parseString(String delimString, String delim) {
 		if (delimString == null) {
 			return new String[0];
 		}

 		// Need to handle case where separator character is
 		// actually part of the target name!
 		StringTokenizer tokenizer = new StringTokenizer(delimString, delim);
 		String[] results = new String[tokenizer.countTokens()];
 		for (int i = 0; i < results.length; i++) {
 			results[i] = tokenizer.nextToken();
 		}

 		return results;
 	}

 	/**
 	 * Returns an IFile with the given fully qualified path. The returned IFile
 	 * may or may not exist.
 	 */
 	public static IFile getFile(String fullPath) {
 		IWorkspaceRoot root= ResourcesPlugin.getWorkspace().getRoot();
 		return root.getFile(new Path(fullPath));
 	}

 	public static FileLink getTaskLink(String path, File buildFileParent) {
 		path = path.trim();
 		if (path.length() == 0) {
 			return null;
 		}
 		if (path.startsWith("file:")) { //$NON-NLS-1$
 			// remove "file:"
 			path= path.substring(5, path.length());
 		}
 		// format is file:F:L: where F is file path, and L is line number
 		int index = path.lastIndexOf(':');
 		if (index == path.length() - 1) {
 			// remove trailing ':'
 			path = path.substring(0, index);
 			index = path.lastIndexOf(':');
 		}
 		// split file and line number
 		String fileName = path.substring(0, index);
 		IFile file = getFileForLocation(fileName, buildFileParent);
 		if (file != null) {
 			try {
 				String lineNumber = path.substring(index + 1);
 				int line = Integer.parseInt(lineNumber);
 				return new FileLink(file, null, -1, -1, line);
 			} catch (NumberFormatException e) {
 			}
 		}
 		return null;
 	}

 	/**
 	 * Returns the workspace file associated with the given path in the
 	 * local file system, or <code>null</code> if none.
 	 * If the path happens to be a relative path, then the path is interpreted as
 	 * relative to the specified parent file.
 	 *
 	 * Attempts to handle linked files; the first found linked file with the correct
 	 * path is returned.
 	 *
 	 * @param path
 	 * @param buildFileParent
 	 * @return file or <code>null</code>
 	 * @see org.eclipse.core.resources.IWorkspaceRoot#findFilesForLocation(IPath)
 	 */
 	public static IFile getFileForLocation(String path, File buildFileParent) {
 		IPath filePath= new Path(path);
 		IFile file = null;
 		IFile[] files= ResourcesPlugin.getWorkspace().getRoot().findFilesForLocation(filePath);
 		if (files.length > 0) {
 			file= files[0];
 		}
 		if (file == null) {
 			//relative path
 			File relativeFile= null;
 			try {
 				//this call is ok if buildFileParent is null
 				relativeFile= FileUtils.newFileUtils().resolveFile(buildFileParent, path);
 				filePath= new Path(relativeFile.getAbsolutePath());
 				files= ResourcesPlugin.getWorkspace().getRoot().findFilesForLocation(filePath);
 				if (files.length > 0) {
 					file= files[0];
 				} else {
 					return null;
 				}
 			} catch (BuildException be) {
 				return null;
 			}
 		}

 		if (file.exists()) {
 			return file;
 		}
 		return null;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ant.internal.ui.model;


	import java.io.File;
	import java.net.URL;
	import java.text.MessageFormat;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.StringTokenizer;

	import org.apache.tools.ant.BuildException;
	import org.apache.tools.ant.util.FileUtils;
	import org.eclipse.ant.core.AntCorePlugin;
	import org.eclipse.ant.core.AntCorePreferences;
	import org.eclipse.ant.core.AntRunner;
	import org.eclipse.ant.core.IAntClasspathEntry;
	import org.eclipse.ant.core.TargetInfo;
	import org.eclipse.ant.internal.core.AntClasspathEntry;
	import org.eclipse.ant.internal.ui.launchConfigurations.IAntLaunchConfigurationConstants;
	import org.eclipse.ant.internal.ui.views.AntView;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IWorkspaceRoot;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.variables.VariablesPlugin;
	import org.eclipse.debug.core.ILaunchConfiguration;
	import org.eclipse.debug.ui.console.FileLink;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchWindow;
	import org.eclipse.ui.PlatformUI;

	/**
	* General utility class dealing with Ant build files
	*/
	public final class AntUtil {
	public static final String ATTRIBUTE_SEPARATOR = ","; //$NON-NLS-1$;
	public static final char ANT_CLASSPATH_DELIMITER= '*';
	public static final String ANT_HOME_CLASSPATH_PLACEHOLDER= "G"; //$NON-NLS-1$
	public static final String ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER= "UG"; //$NON-NLS-1$
	/**
	* No instances allowed
	*/
	private AntUtil() {
	super();
	}

	/**
	* Returns a single-string of the strings for storage.
	*
	* @param strings the array of strings
	* @return a single-string representation of the strings or
	* <code>null</code> if the array is empty.
	*/
	public static String combineStrings(String[] strings) {
	if (strings.length == 0)
	return null;

	if (strings.length == 1)
	return strings[0];

	StringBuffer buf = new StringBuffer();
	for (int i = 0; i < strings.length - 1; i++) {
	buf.append(strings[i]);
	buf.append(ATTRIBUTE_SEPARATOR);
	}
	buf.append(strings[strings.length - 1]);
	return buf.toString();
	}

	/**
	* Returns an array of targets to be run, or <code>null</code> if none are
	* specified (indicating the default target should be run).
	*
	* @param configuration launch configuration
	* @return array of target names, or <code>null</code>
	* @throws CoreException if unable to access the associated attribute
	*/
	public static String[] getTargetsFromConfig(ILaunchConfiguration configuration) throws CoreException {
	String attribute = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_TARGETS, (String) null);
	if (attribute == null) {
	return null;
	} else {
	return AntUtil.parseRunTargets(attribute);
	}
	}

	/**
	* Returns a map of properties to be defined for the build, or
	* <code>null</code> if none are specified (indicating no additional
	* properties specified for the build).
	*
	* @param configuration launch configuration
	* @return map of properties (name --> value), or <code>null</code>
	* @throws CoreException if unable to access the associated attribute
	*/
	public static Map getProperties(ILaunchConfiguration configuration) throws CoreException {
	Map map = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_PROPERTIES, (Map) null);
	return map;
	}

	/**
	* Returns a String specifying the Ant home to use for the build, or
	* <code>null</code> if none is specified.
	*
	* @param configuration launch configuration
	* @return String specifying Ant home to use, or <code>null</code>
	* @throws CoreException if unable to access the associated attribute
	*/
	public static String getAntHome(ILaunchConfiguration configuration) throws CoreException {
	return configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_HOME, (String) null);
	}

	/**
	* Returns an array of property files to be used for the build, or
	* <code>null</code> if none are specified (indicating no additional
	* property files specified for the build).
	*
	* @param configuration launch configuration
	* @return array of property file names, or <code>null</code>
	* @throws CoreException if unable to access the associated attribute
	*/
	public static String[] getPropertyFiles(ILaunchConfiguration configuration) throws CoreException {
	String attribute = configuration.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_PROPERTY_FILES, (String) null);
	if (attribute == null) {
	return null;
	} else {
	String[] propertyFiles= AntUtil.parseString(attribute, ","); //$NON-NLS-1$
	for (int i = 0; i < propertyFiles.length; i++) {
	String propertyFile = propertyFiles[i];
	propertyFile= expandVariableString(propertyFile, AntUIModelMessages.getString("AntUtil.6")); //$NON-NLS-1$ //$NON-NLS-2$
	propertyFiles[i]= propertyFile;
	}
	return propertyFiles;
	}
	}

	/**
	* Returns the list of all targets for the Ant build file specified by
	* the provided IPath, or <code>null</code> if no targets found.
	*
	* @param path the location of the Ant build file to get the targets from
	* @return a list of <code>TargetInfo</code>
	*
	* @throws CoreException if file does not exist, IO problems, or invalid format.
	*/
	public static TargetInfo[] getTargets(String path) throws CoreException {
	AntRunner runner = new AntRunner();
	runner.setBuildFileLocation(path);
	return runner.getAvailableTargets();
	}

	/**
	* Returns the list of all targets for the Ant build file specified by
	* the provided IPath, arguments and ILaunchConfiguration, or <code>null</code> if no targets found.
	*
	* @param path the location of the Ant build file to get the targets from
	* @param arguments command line arguments for the Ant build
	* @param config the launch configuration for the Ant build
	* @return a list of <code>TargetInfo</code>
	*
	* @throws CoreException if file does not exist, IO problems, or invalid format.
	*/
	public static TargetInfo[] getTargets(String path, String[] arguments, ILaunchConfiguration config) throws CoreException {
	Map properties=getProperties(config);
	String[] propertyFiles= getPropertyFiles(config);
	AntRunner runner = new AntRunner();
	runner.setBuildFileLocation(path);
	if (properties != null){
	runner.addUserProperties(properties);
	}
	if (propertyFiles != null && propertyFiles.length > 0) {
	runner.setPropertyFiles(propertyFiles);
	}
	if (arguments != null && arguments.length > 0) {
	runner.setArguments(arguments);
	}
	runner.setCustomClasspath(getCustomClasspath(config));

	String antHome= getAntHome(config);
	if (antHome != null) {
	runner.setAntHome(antHome);
	}
	return runner.getAvailableTargets();
	}

	/**
	* Returns the list of urls that define the custom classpath for the Ant
	* build, or <code>null</code> if the global classpath is to be used.
	*
	* @param config launch configuration
	* @return a list of <code>URL</code>
	*
	* @throws CoreException if file does not exist, IO problems, or invalid format.
	*/
	public static URL[] getCustomClasspath(ILaunchConfiguration config) throws CoreException {
	String classpathString= config.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_CUSTOM_CLASSPATH, (String)null);
	if (classpathString == null) {
	return null;
	}

	List antEntries= new ArrayList();
	List additionalEntries= new ArrayList();
	if (classpathString.equals(ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER + AntUtil.ATTRIBUTE_SEPARATOR + ANT_HOME_CLASSPATH_PLACEHOLDER )) {
	//really the default classpath ..just ordered differently
	antEntries.addAll(Arrays.asList(AntCorePlugin.getPlugin().getPreferences().getAdditionalClasspathEntries()));
	antEntries.addAll(Arrays.asList(AntCorePlugin.getPlugin().getPreferences().getAntHomeClasspathEntries()));
	} else {
	getCustomClasspaths(config, antEntries, additionalEntries);
	antEntries.addAll(additionalEntries);
	}

	Iterator iter= antEntries.iterator();
	URL[] urls= new URL[antEntries.size()];
	int i= 0;
	while (iter.hasNext()) {
	IAntClasspathEntry entry = (IAntClasspathEntry) iter.next();
	urls[i]= entry.getEntryURL();
	i++;
	}
	return urls;

	}

	/**
	* Adds the Ant home entries and additional entries to the provided lists.
	* If no custom classpath is set, no entries are added to the lists.
	*
	* @param config launch configuration
	* @param antHomeEntries list to add the Ant home entries to
	* @param additionalEntries list to add the additional entries to
	*
	*/
	public static void getCustomClasspaths(ILaunchConfiguration config, List antHomeEntries, List additionalEntries) {
	String classpathString= null;
	try {
	classpathString = config.getAttribute(IAntLaunchConfigurationConstants.ATTR_ANT_CUSTOM_CLASSPATH, (String) null);
	} catch (CoreException e) {
	}
	if (classpathString == null) {
	return;
	}
	String antString= null;
	String userString= null;
	int delim= classpathString.indexOf(ANT_CLASSPATH_DELIMITER);

	if (delim == -1) {
	antString= classpathString;
	} else {
	antString= classpathString.substring(0, delim);
	userString= classpathString.substring(delim+1);
	}

	getEntries(antHomeEntries, antString);

	if (userString != null) {
	getEntries(additionalEntries, userString);
	}
	}

	private static void getEntries(List entries, String urlString) {
	String[] entryStrings= AntUtil.parseString(urlString, AntUtil.ATTRIBUTE_SEPARATOR);
	AntCorePreferences prefs= AntCorePlugin.getPlugin().getPreferences();
	for (int i = 0; i < entryStrings.length; i++) {
	String string = entryStrings[i];
	if (string.equals(ANT_HOME_CLASSPATH_PLACEHOLDER)) {
	entries.addAll(Arrays.asList(prefs.getAntHomeClasspathEntries()));
	} else if (string.equals(ANT_GLOBAL_USER_CLASSPATH_PLACEHOLDER)) {
	entries.addAll(Arrays.asList(prefs.getAdditionalClasspathEntries()));
	} else {
	if (string.charAt(0) == '?') {
	string= string.substring(1);
	}
	entries.add(new AntClasspathEntry(string));
	}
	}
	}

	private static String expandVariableString(String variableString, String invalidMessage) throws CoreException {
	String expandedString = VariablesPlugin.getDefault().getStringVariableManager().performStringSubstitution(variableString);
	if (expandedString == null \|\| expandedString.length() == 0) {
	String msg = MessageFormat.format(invalidMessage, new String[] {variableString});
	throw new CoreException(new Status(IStatus.ERROR, IAntUIConstants.PLUGIN_ID, 0, msg, null));
	} else {
	variableString= expandedString;
	}
	return variableString;
	}

	/**
	* Returns the currently displayed Ant View if it is open.
	*
	* @return the Ant View open in the current workbench page or
	* <code>null</code> if there is none.
	*/
	public static AntView getAntView() {
	IWorkbenchWindow window= PlatformUI.getWorkbench().getActiveWorkbenchWindow();
	if (window != null) {
	IWorkbenchPage page= window.getActivePage();
	if (page != null) {
	return (AntView) page.findView(IAntUIConstants.ANT_VIEW_ID);
	}
	}
	return null;
	}

	/**
	* Returns the list of target names to run
	*
	* @param extraAttibuteValue the external tool's extra attribute value
	* for the run targets key.
	* @return a list of target names
	*/
	public static String[] parseRunTargets(String extraAttibuteValue) {
	return parseString(extraAttibuteValue, ATTRIBUTE_SEPARATOR);
	}

	/**
	* Returns the list of Strings that were delimiter separated.
	*
	* @param delimString the String to be tokenized based on the delimiter
	* @return a list of Strings
	*/
	public static String[] parseString(String delimString, String delim) {
	if (delimString == null) {
	return new String[0];
	}

	// Need to handle case where separator character is
	// actually part of the target name!
	StringTokenizer tokenizer = new StringTokenizer(delimString, delim);
	String[] results = new String[tokenizer.countTokens()];
	for (int i = 0; i < results.length; i++) {
	results[i] = tokenizer.nextToken();
	}

	return results;
	}

	/**
	* Returns an IFile with the given fully qualified path. The returned IFile
	* may or may not exist.
	*/
	public static IFile getFile(String fullPath) {
	IWorkspaceRoot root= ResourcesPlugin.getWorkspace().getRoot();
	return root.getFile(new Path(fullPath));
	}

	public static FileLink getTaskLink(String path, File buildFileParent) {
	path = path.trim();
	if (path.length() == 0) {
	return null;
	}
	if (path.startsWith("file:")) { //$NON-NLS-1$
	// remove "file:"
	path= path.substring(5, path.length());
	}
	// format is file:F:L: where F is file path, and L is line number
	int index = path.lastIndexOf(':');
	if (index == path.length() - 1) {
	// remove trailing ':'
	path = path.substring(0, index);
	index = path.lastIndexOf(':');
	}
	// split file and line number
	String fileName = path.substring(0, index);
	IFile file = getFileForLocation(fileName, buildFileParent);
	if (file != null) {
	try {
	String lineNumber = path.substring(index + 1);
	int line = Integer.parseInt(lineNumber);
	return new FileLink(file, null, -1, -1, line);
	} catch (NumberFormatException e) {
	}
	}
	return null;
	}

	/**
	* Returns the workspace file associated with the given path in the
	* local file system, or <code>null</code> if none.
	* If the path happens to be a relative path, then the path is interpreted as
	* relative to the specified parent file.
	*
	* Attempts to handle linked files; the first found linked file with the correct
	* path is returned.
	*
	* @param path
	* @param buildFileParent
	* @return file or <code>null</code>
	* @see org.eclipse.core.resources.IWorkspaceRoot#findFilesForLocation(IPath)
	*/
	public static IFile getFileForLocation(String path, File buildFileParent) {
	IPath filePath= new Path(path);
	IFile file = null;
	IFile[] files= ResourcesPlugin.getWorkspace().getRoot().findFilesForLocation(filePath);
	if (files.length > 0) {
	file= files[0];
	}
	if (file == null) {
	//relative path
	File relativeFile= null;
	try {
	//this call is ok if buildFileParent is null
	relativeFile= FileUtils.newFileUtils().resolveFile(buildFileParent, path);
	filePath= new Path(relativeFile.getAbsolutePath());
	files= ResourcesPlugin.getWorkspace().getRoot().findFilesForLocation(filePath);
	if (files.length > 0) {
	file= files[0];
	} else {
	return null;
	}
	} catch (BuildException be) {
	return null;
	}
	}

	if (file.exists()) {
	return file;
	}
	return null;
	}
	}