org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/debug/ui/launchConfigurations/JavaMainTab.java - jdt/eclipse.jdt.debug - 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.jdt.debug.ui.launchConfigurations;


 import java.lang.reflect.InvocationTargetException;
 import java.text.MessageFormat;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.debug.core.ILaunchConfiguration;
 import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
 import org.eclipse.jdt.core.IClassFile;
 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaModel;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.IMember;
 import org.eclipse.jdt.core.IType;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.search.IJavaSearchScope;
 import org.eclipse.jdt.core.search.SearchEngine;
 import org.eclipse.jdt.debug.ui.IJavaDebugUIConstants;
 import org.eclipse.jdt.internal.debug.ui.IJavaDebugHelpContextIds;
 import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
 import org.eclipse.jdt.internal.debug.ui.launcher.JavaLaunchConfigurationTab;
 import org.eclipse.jdt.internal.debug.ui.launcher.LauncherMessages;
 import org.eclipse.jdt.internal.debug.ui.launcher.MainMethodSearchEngine;
 import org.eclipse.jdt.internal.debug.ui.launcher.MainTypeSelectionDialog;
 import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
 import org.eclipse.jdt.ui.IJavaElementSearchConstants;
 import org.eclipse.jdt.ui.ISharedImages;
 import org.eclipse.jdt.ui.JavaElementLabelProvider;
 import org.eclipse.jdt.ui.JavaUI;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.window.Window;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.dialogs.ElementListSelectionDialog;
 import org.eclipse.ui.dialogs.SelectionDialog;
 import org.eclipse.ui.help.WorkbenchHelp;

 /**
  * A launch configuration tab that displays and edits project and
  * main type name launch configuration attributes.
  * <p>
  * This class may be instantiated. This class is not intended to be subclassed.
  * </p>
  * @since 2.0
  */

 public class JavaMainTab extends JavaLaunchConfigurationTab {

 	// Project UI widgets
 	protected Text fProjText;
 	protected Button fProjButton;

 	// Main class UI widgets
 	protected Text fMainText;
 	protected Button fSearchButton;
 	protected Button fSearchExternalJarsCheckButton;
 	protected Button fConsiderInheritedMainButton;
 	protected Button fStopInMainCheckButton;

 	protected static final String EMPTY_STRING = ""; //$NON-NLS-1$

 	/**
 	 * A listener which handles widget change events for the controls
 	 * in this tab.
 	 */
 	private class WidgetListener implements ModifyListener, SelectionListener {
 		public void modifyText(ModifyEvent e) {
 			updateLaunchConfigurationDialog();
 		}
 		public void widgetSelected(SelectionEvent e) {
 			Object source = e.getSource();
 			if (source == fProjButton) {
 				handleProjectButtonSelected();
 			} else if (source == fSearchButton) {
 				handleSearchButtonSelected();
 			} else {
 				updateLaunchConfigurationDialog();
 			}
 		}
 		public void widgetDefaultSelected(SelectionEvent e) {
 		}
 	}

 	private WidgetListener fListener = new WidgetListener();

 	/**
 	 * Boolean launch configuration attribute indicating that external jars (on
 	 * the runtime classpath) should be searched when looking for a main type.
 	 * Default value is <code>false</code>.
 	 *
 	 * @since 2.1
 	 */
 	public static final String ATTR_INCLUDE_EXTERNAL_JARS = IJavaDebugUIConstants.PLUGIN_ID + ".INCLUDE_EXTERNAL_JARS"; //$NON-NLS-1$

 	/**
 	 * Boolean launch configuration attribute indicating whether types inheriting
 	 * a main method should be considerd when searching for a main type.
 	 * Default value is <code>false</code>.
 	 *
 	 * @since 3.0
 	 */
 	public static final String ATTR_CONSIDER_INHERITED_MAIN = IJavaDebugUIConstants.PLUGIN_ID + ".CONSIDER_INHERITED_MAIN"; //$NON-NLS-1$

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(Composite)
 	 */
 	public void createControl(Composite parent) {
 		Font font = parent.getFont();

 		Composite comp = new Composite(parent, SWT.NONE);
 		setControl(comp);
 		WorkbenchHelp.setHelp(getControl(), IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_MAIN_TAB);
 		GridLayout topLayout = new GridLayout();
 		topLayout.verticalSpacing = 0;
 		topLayout.numColumns = 2;
 		comp.setLayout(topLayout);
 		comp.setFont(font);

 		createVerticalSpacer(comp, 2);

 		Label projLabel = new Label(comp, SWT.NONE);
 		projLabel.setText(LauncherMessages.getString("JavaMainTab.&Project__2")); //$NON-NLS-1$
 		GridData gd = new GridData();
 		gd.horizontalSpan = 2;
 		projLabel.setLayoutData(gd);
 		projLabel.setFont(font);

 		fProjText = new Text(comp, SWT.SINGLE | SWT.BORDER);
 		gd = new GridData(GridData.FILL_HORIZONTAL);
 		fProjText.setLayoutData(gd);
 		fProjText.setFont(font);
 		fProjText.addModifyListener(fListener);

 		fProjButton = createPushButton(comp, LauncherMessages.getString("JavaMainTab.&Browse_3"), null); //$NON-NLS-1$
 		fProjButton.addSelectionListener(fListener);

 		createVerticalSpacer(comp, 2);

 		createMainTypeEditor(comp);

 		createVerticalSpacer(comp, 2);

 		fStopInMainCheckButton = createCheckButton(comp, LauncherMessages.getString("JavaMainTab.St&op_in_main_1")); //$NON-NLS-1$
 		gd = new GridData();
 		gd.horizontalSpan = 2;
 		fStopInMainCheckButton.setLayoutData(gd);
 		fStopInMainCheckButton.addSelectionListener(fListener);

 	}

 	/**
 	 * Creates the widgets for specifying a main type.
 	 *
 	 * @param parent the parent composite
 	 */
 	private void createMainTypeEditor(Composite parent) {
 		Font font= parent.getFont();
 		Group mainGroup= new Group(parent, SWT.NONE);
 		mainGroup.setText(LauncherMessages.getString("JavaMainTab.Main_cla&ss__4")); //$NON-NLS-1$
 		GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan = 2;
 		mainGroup.setLayoutData(gd);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 2;
 		mainGroup.setLayout(layout);
 		mainGroup.setFont(font);

 		fMainText = new Text(mainGroup, SWT.SINGLE | SWT.BORDER);
 		gd = new GridData(GridData.FILL_HORIZONTAL);
 		fMainText.setLayoutData(gd);
 		fMainText.setFont(font);
 		fMainText.addModifyListener(fListener);

 		fSearchButton = createPushButton(mainGroup,LauncherMessages.getString("JavaMainTab.Searc&h_5"), null); //$NON-NLS-1$
 		fSearchButton.addSelectionListener(fListener);

 		fSearchExternalJarsCheckButton = createCheckButton(mainGroup, LauncherMessages.getString("JavaMainTab.E&xt._jars_6")); //$NON-NLS-1$
 		gd = new GridData();
 		gd.horizontalSpan = 2;
 		fSearchExternalJarsCheckButton.setLayoutData(gd);
 		fSearchExternalJarsCheckButton.addSelectionListener(fListener);

 		fConsiderInheritedMainButton = createCheckButton(mainGroup, LauncherMessages.getString("JavaMainTab.22")); //$NON-NLS-1$
 		gd = new GridData();
 		gd.horizontalSpan = 2;
 		fConsiderInheritedMainButton.setLayoutData(gd);
 		fConsiderInheritedMainButton.addSelectionListener(fListener);
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
 	 */
 	public void initializeFrom(ILaunchConfiguration config) {
 		updateProjectFromConfig(config);
 		updateMainTypeFromConfig(config);
 		updateStopInMainFromConfig(config);
 		updateInheritedMainsFromConfig(config);
 		updateExternalJars(config);
 	}

 	protected void updateProjectFromConfig(ILaunchConfiguration config) {
 		String projectName = ""; //$NON-NLS-1$
 		try {
 			projectName = config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, EMPTY_STRING);
 		} catch (CoreException ce) {
 			JDIDebugUIPlugin.log(ce);
 		}
 		fProjText.setText(projectName);
 	}

 	protected void updateMainTypeFromConfig(ILaunchConfiguration config) {
 		String mainTypeName = ""; //$NON-NLS-1$
 		try {
 			mainTypeName = config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, EMPTY_STRING);
 		} catch (CoreException ce) {
 			JDIDebugUIPlugin.log(ce);
 		}
 		fMainText.setText(mainTypeName);
 	}

 	protected void updateStopInMainFromConfig(ILaunchConfiguration configuration) {
 		boolean stop = false;
 		try {
 			stop = configuration.getAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, false);
 		} catch (CoreException e) {
 			JDIDebugUIPlugin.log(e);
 		}
 		fStopInMainCheckButton.setSelection(stop);
 	}

 	protected void updateInheritedMainsFromConfig(ILaunchConfiguration configuration) {
 		boolean inherit = false;
 		try {
 			inherit = configuration.getAttribute(ATTR_CONSIDER_INHERITED_MAIN, false);
 		} catch (CoreException e) {
 			JDIDebugUIPlugin.log(e);
 		}
 		fConsiderInheritedMainButton.setSelection(inherit);
 	}

 	protected void updateExternalJars(ILaunchConfiguration configuration) {
 		boolean search = false;
 		try {
 			search = configuration.getAttribute(ATTR_INCLUDE_EXTERNAL_JARS, false);
 		} catch (CoreException e) {
 			JDIDebugUIPlugin.log(e);
 		}
 		fSearchExternalJarsCheckButton.setSelection(search);
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
 	 */
 	public void performApply(ILaunchConfigurationWorkingCopy config) {
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, fMainText.getText());

 		// attribute added in 2.1, so null must be used instead of false for backwards compatibility
 		if (fStopInMainCheckButton.getSelection()) {
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, true);
 		} else {
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, (String)null);
 		}

 		// attribute added in 2.1, so null must be used instead of false for backwards compatibility
 		if (fSearchExternalJarsCheckButton.getSelection()) {
 			config.setAttribute(ATTR_INCLUDE_EXTERNAL_JARS, true);
 		} else {
 			config.setAttribute(ATTR_INCLUDE_EXTERNAL_JARS, (String)null);
 		}

 		// attribute added in 3.0, so null must be used instead of false for backwards compatibility
 		if (fConsiderInheritedMainButton.getSelection()) {
 			config.setAttribute(ATTR_CONSIDER_INHERITED_MAIN, true);
 		} else {
 			config.setAttribute(ATTR_CONSIDER_INHERITED_MAIN, (String)null);
 		}
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#dispose()
 	 */
 	public void dispose() {
 	}

 	/**
 	 * Show a dialog that lists all main types
 	 */
 	protected void handleSearchButtonSelected() {

 		IJavaProject javaProject = getJavaProject();
 		IJavaSearchScope searchScope = null;
 		if ((javaProject == null) || !javaProject.exists()) {
 			searchScope = SearchEngine.createWorkspaceScope();
 		} else {
 			searchScope = SearchEngine.createJavaSearchScope(new IJavaElement[] {javaProject}, false);
 		}

 		int constraints = IJavaElementSearchConstants.CONSIDER_BINARIES;
 		if (fSearchExternalJarsCheckButton.getSelection()) {
 			constraints |= IJavaElementSearchConstants.CONSIDER_EXTERNAL_JARS;
 		}

 		MainMethodSearchEngine engine = new MainMethodSearchEngine();
 		IType[] types = null;
 		try {
 			types = engine.searchMainMethods(getLaunchConfigurationDialog(), searchScope, constraints, fConsiderInheritedMainButton.getSelection());
 		} catch (InvocationTargetException e) {
 			setErrorMessage(e.getMessage());
 			return;
 		} catch (InterruptedException e) {
 			setErrorMessage(e.getMessage());
 			return;
 		}

 		Shell shell = getShell();
 		SelectionDialog dialog = new MainTypeSelectionDialog(shell, types);
 		dialog.setTitle(LauncherMessages.getString("JavaMainTab.Choose_Main_Type_11")); //$NON-NLS-1$
 		dialog.setMessage(LauncherMessages.getString("JavaMainTab.Choose_a_main_&type_to_launch__12")); //$NON-NLS-1$
 		if (dialog.open() == Window.CANCEL) {
 			return;
 		}

 		Object[] results = dialog.getResult();
 		if ((results == null) || (results.length < 1)) {
 			return;
 		}
 		IType type = (IType)results[0];
 		if (type != null) {
 			fMainText.setText(type.getFullyQualifiedName());
 			javaProject = type.getJavaProject();
 			fProjText.setText(javaProject.getElementName());
 		}
 	}

 	/**
 	 * Show a dialog that lets the user select a project.  This in turn provides
 	 * context for the main type, allowing the user to key a main type name, or
 	 * constraining the search for main types to the specified project.
 	 */
 	protected void handleProjectButtonSelected() {
 		IJavaProject project = chooseJavaProject();
 		if (project == null) {
 			return;
 		}

 		String projectName = project.getElementName();
 		fProjText.setText(projectName);
 	}

 	/**
 	 * Realize a Java Project selection dialog and return the first selected project,
 	 * or null if there was none.
 	 */
 	protected IJavaProject chooseJavaProject() {
 		IJavaProject[] projects;
 		try {
 			projects= JavaCore.create(getWorkspaceRoot()).getJavaProjects();
 		} catch (JavaModelException e) {
 			JDIDebugUIPlugin.log(e);
 			projects= new IJavaProject[0];
 		}

 		ILabelProvider labelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
 		ElementListSelectionDialog dialog= new ElementListSelectionDialog(getShell(), labelProvider);
 		dialog.setTitle(LauncherMessages.getString("JavaMainTab.Project_Selection_13")); //$NON-NLS-1$
 		dialog.setMessage(LauncherMessages.getString("JavaMainTab.Choose_a_&project_to_constrain_the_search_for_main_types__14")); //$NON-NLS-1$
 		dialog.setElements(projects);

 		IJavaProject javaProject = getJavaProject();
 		if (javaProject != null) {
 			dialog.setInitialSelections(new Object[] { javaProject });
 		}
 		if (dialog.open() == Window.OK) {
 			return (IJavaProject) dialog.getFirstResult();
 		}
 		return null;
 	}

 	/**
 	 * Return the IJavaProject corresponding to the project name in the project name
 	 * text field, or null if the text does not match a project name.
 	 */
 	protected IJavaProject getJavaProject() {
 		String projectName = fProjText.getText().trim();
 		if (projectName.length() < 1) {
 			return null;
 		}
 		return getJavaModel().getJavaProject(projectName);
 	}

 	/**
 	 * Convenience method to get the workspace root.
 	 */
 	private IWorkspaceRoot getWorkspaceRoot() {
 		return ResourcesPlugin.getWorkspace().getRoot();
 	}

 	/**
 	 * Convenience method to get access to the java model.
 	 */
 	private IJavaModel getJavaModel() {
 		return JavaCore.create(getWorkspaceRoot());
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#isValid(ILaunchConfiguration)
 	 */
 	public boolean isValid(ILaunchConfiguration config) {

 		setErrorMessage(null);
 		setMessage(null);

 		String name = fProjText.getText().trim();
 		if (name.length() > 0) {
 			IWorkspace workspace = ResourcesPlugin.getWorkspace();
 			IStatus status = workspace.validateName(name, IResource.PROJECT);
 			if (status.isOK()) {
 				IProject project= ResourcesPlugin.getWorkspace().getRoot().getProject(name);
 				if (!project.exists()) {
 					setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.20"), new String[] {name})); //$NON-NLS-1$
 					return false;
 				}
 				if (!project.isOpen()) {
 					setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.21"), new String[] {name})); //$NON-NLS-1$
 					return false;
 				}
 			} else {
 				setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.19"), new String[]{status.getMessage()})); //$NON-NLS-1$
 				return false;
 			}
 		}

 		name = fMainText.getText().trim();
 		if (name.length() == 0) {
 			setErrorMessage(LauncherMessages.getString("JavaMainTab.Main_type_not_specified_16")); //$NON-NLS-1$
 			return false;
 		}

 		return true;
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#setDefaults(ILaunchConfigurationWorkingCopy)
 	 */
 	public void setDefaults(ILaunchConfigurationWorkingCopy config) {
 		IJavaElement javaElement = getContext();
 		if (javaElement != null) {
 			initializeJavaProject(javaElement, config);
 		} else {
 			// We set empty attributes for project & main type so that when one config is
 			// compared to another, the existence of empty attributes doesn't cause an
 			// incorrect result (the performApply() method can result in empty values
 			// for these attributes being set on a config if there is nothing in the
 			// corresponding text boxes)
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, ""); //$NON-NLS-1$
 		}
 		initializeMainTypeAndName(javaElement, config);
 	}

 	/**
 	 * Set the main type & name attributes on the working copy based on the IJavaElement
 	 */
 	protected void initializeMainTypeAndName(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
 		String name= null;
 		if (javaElement instanceof IMember) {
 			IMember member = (IMember)javaElement;
 			if (member.isBinary()) {
 				javaElement = member.getClassFile();
 			} else {
 				javaElement = member.getCompilationUnit();
 			}
 		}
 		if (javaElement instanceof ICompilationUnit || javaElement instanceof IClassFile) {
 			try {
 				IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[]{javaElement}, false);
 				MainMethodSearchEngine engine = new MainMethodSearchEngine();
 				IType[] types = engine.searchMainMethods(getLaunchConfigurationDialog(), scope,
 						IJavaElementSearchConstants.CONSIDER_BINARIES | IJavaElementSearchConstants.CONSIDER_EXTERNAL_JARS,
 						false);
 				if (types != null && (types.length > 0)) {
 					// Simply grab the first main type found in the searched element
 					name = types[0].getFullyQualifiedName();
 				}
 			} catch (InterruptedException ie) {
 			} catch (InvocationTargetException ite) {
 			}
 		}
 		if (name == null) {
 			name= ""; //$NON-NLS-1$
 		}
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, name);
 		if (name.length() > 0) {
 			int index = name.lastIndexOf('.');
 			if (index > 0) {
 				name = name.substring(index + 1);
 			}
 			name = getLaunchConfigurationDialog().generateName(name);
 			config.rename(name);
 		}
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getName()
 	 */
 	public String getName() {
 		return LauncherMessages.getString("JavaMainTab.&Main_19"); //$NON-NLS-1$
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getImage()
 	 */
 	public Image getImage() {
 		return JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#activated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
 	 */
 	public void activated(ILaunchConfigurationWorkingCopy workingCopy) {
 		// do nothing when activated
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#deactivated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
 	 */
 	public void deactivated(ILaunchConfigurationWorkingCopy workingCopy) {
 		// do nothing when deactivated
 	}
 }
	/*******************************************************************************
	* 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.jdt.debug.ui.launchConfigurations;


	import java.lang.reflect.InvocationTargetException;
	import java.text.MessageFormat;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IWorkspace;
	import org.eclipse.core.resources.IWorkspaceRoot;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.debug.core.ILaunchConfiguration;
	import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
	import org.eclipse.jdt.core.IClassFile;
	import org.eclipse.jdt.core.ICompilationUnit;
	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IJavaModel;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.IMember;
	import org.eclipse.jdt.core.IType;
	import org.eclipse.jdt.core.JavaCore;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.search.IJavaSearchScope;
	import org.eclipse.jdt.core.search.SearchEngine;
	import org.eclipse.jdt.debug.ui.IJavaDebugUIConstants;
	import org.eclipse.jdt.internal.debug.ui.IJavaDebugHelpContextIds;
	import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
	import org.eclipse.jdt.internal.debug.ui.launcher.JavaLaunchConfigurationTab;
	import org.eclipse.jdt.internal.debug.ui.launcher.LauncherMessages;
	import org.eclipse.jdt.internal.debug.ui.launcher.MainMethodSearchEngine;
	import org.eclipse.jdt.internal.debug.ui.launcher.MainTypeSelectionDialog;
	import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
	import org.eclipse.jdt.ui.IJavaElementSearchConstants;
	import org.eclipse.jdt.ui.ISharedImages;
	import org.eclipse.jdt.ui.JavaElementLabelProvider;
	import org.eclipse.jdt.ui.JavaUI;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.window.Window;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.dialogs.ElementListSelectionDialog;
	import org.eclipse.ui.dialogs.SelectionDialog;
	import org.eclipse.ui.help.WorkbenchHelp;

	/**
	* A launch configuration tab that displays and edits project and
	* main type name launch configuration attributes.
	* <p>
	* This class may be instantiated. This class is not intended to be subclassed.
	* </p>
	* @since 2.0
	*/

	public class JavaMainTab extends JavaLaunchConfigurationTab {

	// Project UI widgets
	protected Text fProjText;
	protected Button fProjButton;

	// Main class UI widgets
	protected Text fMainText;
	protected Button fSearchButton;
	protected Button fSearchExternalJarsCheckButton;
	protected Button fConsiderInheritedMainButton;
	protected Button fStopInMainCheckButton;

	protected static final String EMPTY_STRING = ""; //$NON-NLS-1$

	/**
	* A listener which handles widget change events for the controls
	* in this tab.
	*/
	private class WidgetListener implements ModifyListener, SelectionListener {
	public void modifyText(ModifyEvent e) {
	updateLaunchConfigurationDialog();
	}
	public void widgetSelected(SelectionEvent e) {
	Object source = e.getSource();
	if (source == fProjButton) {
	handleProjectButtonSelected();
	} else if (source == fSearchButton) {
	handleSearchButtonSelected();
	} else {
	updateLaunchConfigurationDialog();
	}
	}
	public void widgetDefaultSelected(SelectionEvent e) {
	}
	}

	private WidgetListener fListener = new WidgetListener();

	/**
	* Boolean launch configuration attribute indicating that external jars (on
	* the runtime classpath) should be searched when looking for a main type.
	* Default value is <code>false</code>.
	*
	* @since 2.1
	*/
	public static final String ATTR_INCLUDE_EXTERNAL_JARS = IJavaDebugUIConstants.PLUGIN_ID + ".INCLUDE_EXTERNAL_JARS"; //$NON-NLS-1$

	/**
	* Boolean launch configuration attribute indicating whether types inheriting
	* a main method should be considerd when searching for a main type.
	* Default value is <code>false</code>.
	*
	* @since 3.0
	*/
	public static final String ATTR_CONSIDER_INHERITED_MAIN = IJavaDebugUIConstants.PLUGIN_ID + ".CONSIDER_INHERITED_MAIN"; //$NON-NLS-1$

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(Composite)
	*/
	public void createControl(Composite parent) {
	Font font = parent.getFont();

	Composite comp = new Composite(parent, SWT.NONE);
	setControl(comp);
	WorkbenchHelp.setHelp(getControl(), IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_MAIN_TAB);
	GridLayout topLayout = new GridLayout();
	topLayout.verticalSpacing = 0;
	topLayout.numColumns = 2;
	comp.setLayout(topLayout);
	comp.setFont(font);

	createVerticalSpacer(comp, 2);

	Label projLabel = new Label(comp, SWT.NONE);
	projLabel.setText(LauncherMessages.getString("JavaMainTab.&Project__2")); //$NON-NLS-1$
	GridData gd = new GridData();
	gd.horizontalSpan = 2;
	projLabel.setLayoutData(gd);
	projLabel.setFont(font);

	fProjText = new Text(comp, SWT.SINGLE \| SWT.BORDER);
	gd = new GridData(GridData.FILL_HORIZONTAL);
	fProjText.setLayoutData(gd);
	fProjText.setFont(font);
	fProjText.addModifyListener(fListener);

	fProjButton = createPushButton(comp, LauncherMessages.getString("JavaMainTab.&Browse_3"), null); //$NON-NLS-1$
	fProjButton.addSelectionListener(fListener);

	createVerticalSpacer(comp, 2);

	createMainTypeEditor(comp);

	createVerticalSpacer(comp, 2);

	fStopInMainCheckButton = createCheckButton(comp, LauncherMessages.getString("JavaMainTab.St&op_in_main_1")); //$NON-NLS-1$
	gd = new GridData();
	gd.horizontalSpan = 2;
	fStopInMainCheckButton.setLayoutData(gd);
	fStopInMainCheckButton.addSelectionListener(fListener);

	}

	/**
	* Creates the widgets for specifying a main type.
	*
	* @param parent the parent composite
	*/
	private void createMainTypeEditor(Composite parent) {
	Font font= parent.getFont();
	Group mainGroup= new Group(parent, SWT.NONE);
	mainGroup.setText(LauncherMessages.getString("JavaMainTab.Main_cla&ss__4")); //$NON-NLS-1$
	GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan = 2;
	mainGroup.setLayoutData(gd);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	mainGroup.setLayout(layout);
	mainGroup.setFont(font);

	fMainText = new Text(mainGroup, SWT.SINGLE \| SWT.BORDER);
	gd = new GridData(GridData.FILL_HORIZONTAL);
	fMainText.setLayoutData(gd);
	fMainText.setFont(font);
	fMainText.addModifyListener(fListener);

	fSearchButton = createPushButton(mainGroup,LauncherMessages.getString("JavaMainTab.Searc&h_5"), null); //$NON-NLS-1$
	fSearchButton.addSelectionListener(fListener);

	fSearchExternalJarsCheckButton = createCheckButton(mainGroup, LauncherMessages.getString("JavaMainTab.E&xt._jars_6")); //$NON-NLS-1$
	gd = new GridData();
	gd.horizontalSpan = 2;
	fSearchExternalJarsCheckButton.setLayoutData(gd);
	fSearchExternalJarsCheckButton.addSelectionListener(fListener);

	fConsiderInheritedMainButton = createCheckButton(mainGroup, LauncherMessages.getString("JavaMainTab.22")); //$NON-NLS-1$
	gd = new GridData();
	gd.horizontalSpan = 2;
	fConsiderInheritedMainButton.setLayoutData(gd);
	fConsiderInheritedMainButton.addSelectionListener(fListener);
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
	*/
	public void initializeFrom(ILaunchConfiguration config) {
	updateProjectFromConfig(config);
	updateMainTypeFromConfig(config);
	updateStopInMainFromConfig(config);
	updateInheritedMainsFromConfig(config);
	updateExternalJars(config);
	}

	protected void updateProjectFromConfig(ILaunchConfiguration config) {
	String projectName = ""; //$NON-NLS-1$
	try {
	projectName = config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, EMPTY_STRING);
	} catch (CoreException ce) {
	JDIDebugUIPlugin.log(ce);
	}
	fProjText.setText(projectName);
	}

	protected void updateMainTypeFromConfig(ILaunchConfiguration config) {
	String mainTypeName = ""; //$NON-NLS-1$
	try {
	mainTypeName = config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, EMPTY_STRING);
	} catch (CoreException ce) {
	JDIDebugUIPlugin.log(ce);
	}
	fMainText.setText(mainTypeName);
	}

	protected void updateStopInMainFromConfig(ILaunchConfiguration configuration) {
	boolean stop = false;
	try {
	stop = configuration.getAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, false);
	} catch (CoreException e) {
	JDIDebugUIPlugin.log(e);
	}
	fStopInMainCheckButton.setSelection(stop);
	}

	protected void updateInheritedMainsFromConfig(ILaunchConfiguration configuration) {
	boolean inherit = false;
	try {
	inherit = configuration.getAttribute(ATTR_CONSIDER_INHERITED_MAIN, false);
	} catch (CoreException e) {
	JDIDebugUIPlugin.log(e);
	}
	fConsiderInheritedMainButton.setSelection(inherit);
	}

	protected void updateExternalJars(ILaunchConfiguration configuration) {
	boolean search = false;
	try {
	search = configuration.getAttribute(ATTR_INCLUDE_EXTERNAL_JARS, false);
	} catch (CoreException e) {
	JDIDebugUIPlugin.log(e);
	}
	fSearchExternalJarsCheckButton.setSelection(search);
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
	*/
	public void performApply(ILaunchConfigurationWorkingCopy config) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, fMainText.getText());

	// attribute added in 2.1, so null must be used instead of false for backwards compatibility
	if (fStopInMainCheckButton.getSelection()) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, true);
	} else {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_STOP_IN_MAIN, (String)null);
	}

	// attribute added in 2.1, so null must be used instead of false for backwards compatibility
	if (fSearchExternalJarsCheckButton.getSelection()) {
	config.setAttribute(ATTR_INCLUDE_EXTERNAL_JARS, true);
	} else {
	config.setAttribute(ATTR_INCLUDE_EXTERNAL_JARS, (String)null);
	}

	// attribute added in 3.0, so null must be used instead of false for backwards compatibility
	if (fConsiderInheritedMainButton.getSelection()) {
	config.setAttribute(ATTR_CONSIDER_INHERITED_MAIN, true);
	} else {
	config.setAttribute(ATTR_CONSIDER_INHERITED_MAIN, (String)null);
	}
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#dispose()
	*/
	public void dispose() {
	}

	/**
	* Show a dialog that lists all main types
	*/
	protected void handleSearchButtonSelected() {

	IJavaProject javaProject = getJavaProject();
	IJavaSearchScope searchScope = null;
	if ((javaProject == null) \|\| !javaProject.exists()) {
	searchScope = SearchEngine.createWorkspaceScope();
	} else {
	searchScope = SearchEngine.createJavaSearchScope(new IJavaElement[] {javaProject}, false);
	}

	int constraints = IJavaElementSearchConstants.CONSIDER_BINARIES;
	if (fSearchExternalJarsCheckButton.getSelection()) {
	constraints \|= IJavaElementSearchConstants.CONSIDER_EXTERNAL_JARS;
	}

	MainMethodSearchEngine engine = new MainMethodSearchEngine();
	IType[] types = null;
	try {
	types = engine.searchMainMethods(getLaunchConfigurationDialog(), searchScope, constraints, fConsiderInheritedMainButton.getSelection());
	} catch (InvocationTargetException e) {
	setErrorMessage(e.getMessage());
	return;
	} catch (InterruptedException e) {
	setErrorMessage(e.getMessage());
	return;
	}

	Shell shell = getShell();
	SelectionDialog dialog = new MainTypeSelectionDialog(shell, types);
	dialog.setTitle(LauncherMessages.getString("JavaMainTab.Choose_Main_Type_11")); //$NON-NLS-1$
	dialog.setMessage(LauncherMessages.getString("JavaMainTab.Choose_a_main_&type_to_launch__12")); //$NON-NLS-1$
	if (dialog.open() == Window.CANCEL) {
	return;
	}

	Object[] results = dialog.getResult();
	if ((results == null) \|\| (results.length < 1)) {
	return;
	}
	IType type = (IType)results[0];
	if (type != null) {
	fMainText.setText(type.getFullyQualifiedName());
	javaProject = type.getJavaProject();
	fProjText.setText(javaProject.getElementName());
	}
	}

	/**
	* Show a dialog that lets the user select a project. This in turn provides
	* context for the main type, allowing the user to key a main type name, or
	* constraining the search for main types to the specified project.
	*/
	protected void handleProjectButtonSelected() {
	IJavaProject project = chooseJavaProject();
	if (project == null) {
	return;
	}

	String projectName = project.getElementName();
	fProjText.setText(projectName);
	}

	/**
	* Realize a Java Project selection dialog and return the first selected project,
	* or null if there was none.
	*/
	protected IJavaProject chooseJavaProject() {
	IJavaProject[] projects;
	try {
	projects= JavaCore.create(getWorkspaceRoot()).getJavaProjects();
	} catch (JavaModelException e) {
	JDIDebugUIPlugin.log(e);
	projects= new IJavaProject[0];
	}

	ILabelProvider labelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
	ElementListSelectionDialog dialog= new ElementListSelectionDialog(getShell(), labelProvider);
	dialog.setTitle(LauncherMessages.getString("JavaMainTab.Project_Selection_13")); //$NON-NLS-1$
	dialog.setMessage(LauncherMessages.getString("JavaMainTab.Choose_a_&project_to_constrain_the_search_for_main_types__14")); //$NON-NLS-1$
	dialog.setElements(projects);

	IJavaProject javaProject = getJavaProject();
	if (javaProject != null) {
	dialog.setInitialSelections(new Object[] { javaProject });
	}
	if (dialog.open() == Window.OK) {
	return (IJavaProject) dialog.getFirstResult();
	}
	return null;
	}

	/**
	* Return the IJavaProject corresponding to the project name in the project name
	* text field, or null if the text does not match a project name.
	*/
	protected IJavaProject getJavaProject() {
	String projectName = fProjText.getText().trim();
	if (projectName.length() < 1) {
	return null;
	}
	return getJavaModel().getJavaProject(projectName);
	}

	/**
	* Convenience method to get the workspace root.
	*/
	private IWorkspaceRoot getWorkspaceRoot() {
	return ResourcesPlugin.getWorkspace().getRoot();
	}

	/**
	* Convenience method to get access to the java model.
	*/
	private IJavaModel getJavaModel() {
	return JavaCore.create(getWorkspaceRoot());
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#isValid(ILaunchConfiguration)
	*/
	public boolean isValid(ILaunchConfiguration config) {

	setErrorMessage(null);
	setMessage(null);

	String name = fProjText.getText().trim();
	if (name.length() > 0) {
	IWorkspace workspace = ResourcesPlugin.getWorkspace();
	IStatus status = workspace.validateName(name, IResource.PROJECT);
	if (status.isOK()) {
	IProject project= ResourcesPlugin.getWorkspace().getRoot().getProject(name);
	if (!project.exists()) {
	setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.20"), new String[] {name})); //$NON-NLS-1$
	return false;
	}
	if (!project.isOpen()) {
	setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.21"), new String[] {name})); //$NON-NLS-1$
	return false;
	}
	} else {
	setErrorMessage(MessageFormat.format(LauncherMessages.getString("JavaMainTab.19"), new String[]{status.getMessage()})); //$NON-NLS-1$
	return false;
	}
	}

	name = fMainText.getText().trim();
	if (name.length() == 0) {
	setErrorMessage(LauncherMessages.getString("JavaMainTab.Main_type_not_specified_16")); //$NON-NLS-1$
	return false;
	}

	return true;
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#setDefaults(ILaunchConfigurationWorkingCopy)
	*/
	public void setDefaults(ILaunchConfigurationWorkingCopy config) {
	IJavaElement javaElement = getContext();
	if (javaElement != null) {
	initializeJavaProject(javaElement, config);
	} else {
	// We set empty attributes for project & main type so that when one config is
	// compared to another, the existence of empty attributes doesn't cause an
	// incorrect result (the performApply() method can result in empty values
	// for these attributes being set on a config if there is nothing in the
	// corresponding text boxes)
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, ""); //$NON-NLS-1$
	}
	initializeMainTypeAndName(javaElement, config);
	}

	/**
	* Set the main type & name attributes on the working copy based on the IJavaElement
	*/
	protected void initializeMainTypeAndName(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
	String name= null;
	if (javaElement instanceof IMember) {
	IMember member = (IMember)javaElement;
	if (member.isBinary()) {
	javaElement = member.getClassFile();
	} else {
	javaElement = member.getCompilationUnit();
	}
	}
	if (javaElement instanceof ICompilationUnit \|\| javaElement instanceof IClassFile) {
	try {
	IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[]{javaElement}, false);
	MainMethodSearchEngine engine = new MainMethodSearchEngine();
	IType[] types = engine.searchMainMethods(getLaunchConfigurationDialog(), scope,
	IJavaElementSearchConstants.CONSIDER_BINARIES \| IJavaElementSearchConstants.CONSIDER_EXTERNAL_JARS,
	false);
	if (types != null && (types.length > 0)) {
	// Simply grab the first main type found in the searched element
	name = types[0].getFullyQualifiedName();
	}
	} catch (InterruptedException ie) {
	} catch (InvocationTargetException ite) {
	}
	}
	if (name == null) {
	name= ""; //$NON-NLS-1$
	}
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, name);
	if (name.length() > 0) {
	int index = name.lastIndexOf('.');
	if (index > 0) {
	name = name.substring(index + 1);
	}
	name = getLaunchConfigurationDialog().generateName(name);
	config.rename(name);
	}
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#getName()
	*/
	public String getName() {
	return LauncherMessages.getString("JavaMainTab.&Main_19"); //$NON-NLS-1$
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#getImage()
	*/
	public Image getImage() {
	return JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#activated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
	*/
	public void activated(ILaunchConfigurationWorkingCopy workingCopy) {
	// do nothing when activated
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#deactivated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
	*/
	public void deactivated(ILaunchConfigurationWorkingCopy workingCopy) {
	// do nothing when deactivated
	}
	}