plugins/org.eclipse.jst.servlet.ui/servlet_ui/org/eclipse/jst/servlet/ui/internal/wizard/MultiSelectFilteredFileSelectionDialog.java - gerrit/jeetools/webtools.javaee - Git at Google

 /*******************************************************************************
  * Copyright (c) 2003, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  * Kaloyan Raev, kaloyan.raev@sap.com
  *******************************************************************************/
 package org.eclipse.jst.servlet.ui.internal.wizard;

 import static org.eclipse.jst.j2ee.web.IServletConstants.QUALIFIED_SERVLET;
 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.DEFAULT_PACKAGE;

 import java.util.ArrayList;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.IType;
 import org.eclipse.jdt.core.ITypeHierarchy;
 import org.eclipse.jdt.ui.ISharedImages;
 import org.eclipse.jdt.ui.JavaUI;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.operation.IRunnableContext;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jst.j2ee.internal.dialogs.FilteredFileSelectionDialog;
 import org.eclipse.jst.j2ee.internal.dialogs.TwoArrayQuickSorter;
 import org.eclipse.jst.j2ee.internal.dialogs.TypedFileViewerFilter;
 import org.eclipse.jst.j2ee.internal.web.providers.WebAppEditResourceHandler;
 import org.eclipse.jst.servlet.ui.internal.plugin.ServletUIPlugin;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 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.Control;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
 import org.eclipse.ui.dialogs.ISelectionStatusValidator;
 import org.eclipse.ui.part.PageBook;

 /**
  * Insert the type's description here.
  * Creation date: (7/30/2001 11:16:36 AM)
  */
 public class MultiSelectFilteredFileSelectionDialog extends
 		FilteredFileSelectionDialog implements SelectionListener {


 	private static class PackageRenderer extends LabelProvider {
 		private final Image PACKAGE_ICON = JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_PACKAGE);

 		public String getText(Object element) {
 			IType type = (IType) element;
 			String p = type.getPackageFragment().getElementName();
 			if ("".equals(p)) //$NON-NLS-1$
 				p = DEFAULT_PACKAGE;
 			return (p + " - " + type.getPackageFragment().getParent().getPath().toString()); //$NON-NLS-1$
 		}
 		public Image getImage(Object element) {
 			return PACKAGE_ICON;
 		}
 	}

 	private static class TypeRenderer extends LabelProvider {
 		private final Image CLASS_ICON = JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);

 		public String getText(Object element) {
 			IType e = ((IType) element);
 			return e.getElementName();
 		}

 		public Image getImage(Object element) {
 			return CLASS_ICON;
 		}

 	}
 	public final static int JSP = 0;
 	public final static int SERVLET = 1;
 	protected Button fServletButton;
 	protected Button fJSPButton;
 	protected int fSelection = -1;
 	protected PageBook fPageBook = null;
 	protected Control fJspControl = null;
 	protected Control fServletControl = null;
 	protected Composite fChild = null;
 	// construction parameters
 	protected IRunnableContext fRunnableContext;
 	protected ILabelProvider fElementRenderer;
 	protected ILabelProvider fQualifierRenderer;
 	private Object[] fElements;
 	private boolean fIgnoreCase = true;
 	private String fUpperListLabel;
 	private String fLowerListLabel;
 	// SWT widgets
 	private Table fUpperList;
 	private Table fLowerList;
 	protected Text fText;
 	private IType[] fIT;
 	private String[] fRenderedStrings;
 	private int[] fElementMap;
 	private Integer[] fQualifierMap;

 	private ISelectionStatusValidator fLocalValidator = null;
 	/**
 	 * MultiSelectFilteredFileSelectionDialog constructor comment.
 	 * @param parent Shell
 	 * @param title String
 	 * @param message String
 	 * @parent extensions String[]
 	 * @param allowMultiple boolean
 	 */
 	public MultiSelectFilteredFileSelectionDialog(Shell parent, String title, String message, String[] extensions, boolean allowMultiple, IProject project) {
 		super(parent, title, message, extensions, allowMultiple);
 		setShellStyle(SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE);

 		if (title == null)
 			setTitle(WebAppEditResourceHandler.getString("File_Selection_UI_")); //$NON-NLS-1$
 		if (message == null)
 			message = WebAppEditResourceHandler.getString("Select_a_file__UI_"); //$NON-NLS-1$
 		setMessage(message);
 		setExtensions(extensions);
 		addFilter(new TypedFileViewerFilter(extensions));
 		fLocalValidator = new SimpleTypedElementSelectionValidator(new Class[] { IFile.class }, allowMultiple);
 		setValidator(fLocalValidator);

 		//StatusInfo currStatus = new StatusInfo();
 		//currStatus.setOK();
 		Status currStatus = new Status(Status.OK, ServletUIPlugin.PLUGIN_ID, Status.OK, "", null);

 		updateStatus(currStatus);
 		fElementRenderer = new TypeRenderer();
 		fQualifierRenderer = new PackageRenderer();
 		fRunnableContext = ServletUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
 		try {
 			IJavaElement jelem = null;
 			IProject proj = null;
 			jelem = (IJavaElement) project.getAdapter(IJavaElement.class);
 			if (jelem == null) {
 				IResource resource = (IResource) project.getAdapter(IResource.class);
 				if (resource != null) {
 					proj = resource.getProject();
 					if (proj != null) {
 						jelem = org.eclipse.jdt.core.JavaCore.create(proj);
 					}
 				}
 			}
 			IJavaProject jp = jelem.getJavaProject();

 			IType servletType = jp.findType(QUALIFIED_SERVLET);
 			// next 3 lines fix defect 177686
 			if (servletType == null) {
 				return;
 			}

 			ArrayList servletClasses = new ArrayList();
 			ITypeHierarchy tH = servletType.newTypeHierarchy(jp, null);
 			IType[] types = tH.getAllSubtypes(servletType);
 			for (int i = 0; i < types.length; i++) {
 				if (types[i].isClass() && !servletClasses.contains(types[i]))
 					servletClasses.add(types[i]);
 			}
 			fIT = (IType[]) servletClasses.toArray(new IType[servletClasses.size()]);
 			servletClasses = null;

 		} catch (Exception e) {
 			ServletUIPlugin.log(e);
 		}
 	}

 	/**
 	 * @private
 	 */
 	protected void computeResult() {
 		if (fSelection == JSP) {
 			super.computeResult();
 		} else {
 			IType type = (IType) getWidgetSelection();
 			if (type != null) {
 				if (type == null) {
 					String title = WebAppEditResourceHandler.getString("Select_Class_UI_"); //$NON-NLS-1$ = "Select Class"
 					String message = WebAppEditResourceHandler.getString("Could_not_uniquely_map_the_ERROR_"); //$NON-NLS-1$ = "Could not uniquely map the class name to a class."
 					MessageDialog.openError(getShell(), title, message);
 					setResult(null);
 				} else {
 					java.util.List result = new ArrayList(1);
 					result.add(type);
 					setResult(result);
 				}
 			}
 		}
 	}

 	public void create() {
 		super.create();
 		fText.setFocus();
 		rematch(""); //$NON-NLS-1$
 		updateOkState();
 	}

 	/**
 	 * Creates and returns the contents of this dialog's
 	 * button bar.
 	 * <p>
 	 * The <code>Dialog</code> implementation of this framework method
 	 * lays out a button bar and calls the <code>createButtonsForButtonBar</code>
 	 * framework method to populate it. Subclasses may override.
 	 * </p>
 	 *
 	 * @param parent the parent composite to contain the button bar
 	 * @return the button bar control
 	 */
 	protected Control createButtonBar(Composite parent) {

 		Composite composite = new Composite(parent, SWT.NULL);
 		GridLayout layout = new GridLayout();

 		layout.numColumns = 2;

 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		composite.setLayout(layout);
 		composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		Composite composite2 = new Composite(composite, SWT.NONE);

 		// create a layout with spacing and margins appropriate for the font size.
 		layout = new GridLayout();
 		layout.numColumns = 0; // this is incremented by createButton
 		layout.makeColumnsEqualWidth = true;
 		layout.marginWidth = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_MARGIN);
 		layout.marginHeight = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_MARGIN);
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_SPACING);
 		layout.verticalSpacing = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_SPACING);

 		composite2.setLayout(layout);

 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER);
 		composite2.setLayoutData(data);

 		composite2.setFont(parent.getFont());

 		// Add the buttons to the button bar.
 		super.createButtonsForButtonBar(composite2);

 		return composite;
 	}

 	/*
 	 * @private
 	 */
 	protected Control createDialogArea(Composite parent) {
 		GridData gd = new GridData();

 		fChild = new Composite(parent, SWT.NONE);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(fChild, "com.ibm.etools.webapplicationedit.webx2010"); //$NON-NLS-1$
 		GridLayout gl = new GridLayout();
 		gl.numColumns = 2;
 		gl.marginHeight = 0;
 		fChild.setLayout(gl);

 		gd.verticalAlignment = GridData.FILL;
 		gd.grabExcessVerticalSpace = true;
 		fChild.setLayoutData(gd);

 		// Create the Web Type radio buttons and text fields.
 		fServletButton = new Button(fChild, SWT.RADIO);
 		fServletButton.setText(WebAppEditResourceHandler.getString("Servlet_UI_")); //$NON-NLS-1$ = Servlet
 		gd = new GridData();
 		fServletButton.setLayoutData(gd);
 		fServletButton.addSelectionListener(this);

 		fJSPButton = new Button(fChild, SWT.RADIO);
 		fJSPButton.setText("JSP"); //$NON-NLS-1$
 		gd = new GridData();
 		fJSPButton.setLayoutData(gd);
 		fJSPButton.addSelectionListener(this);

 		if (fSelection == JSP)
 			fJSPButton.setSelection(true);
 		else {
 			fServletButton.setSelection(true);
 			fSelection = SERVLET;
 		}

 		fPageBook = new PageBook(fChild, SWT.NONE);
 		gd = new GridData();
 		gd.horizontalAlignment = GridData.FILL;
 		gd.verticalAlignment = GridData.FILL;
 		gd.grabExcessHorizontalSpace = true;
 		gd.grabExcessVerticalSpace = true;
 		gd.horizontalSpan = 2;
 		fPageBook.setLayoutData(gd);
 		fJspControl = super.createDialogArea(fPageBook);

 		Composite composite = new Composite(fPageBook, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
 		layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
 		layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
 		composite.setLayout(layout);
 		composite.setLayoutData(new GridData(GridData.FILL_BOTH));
 		composite.setFont(parent.getFont());

 		Label messageLabel = new Label(composite, SWT.NONE);
 		gd = new GridData();
 		messageLabel.setLayoutData(gd);
 		messageLabel.setText(WebAppEditResourceHandler.getString("Choose_a_servlet__1")); //$NON-NLS-1$

 		fText = createText(composite);

 		messageLabel = new Label(composite, SWT.NONE);
 		gd = new GridData();
 		messageLabel.setLayoutData(gd);
 		messageLabel.setText(WebAppEditResourceHandler.getString("Matching_servlets__2")); //$NON-NLS-1$

 		fUpperList = createUpperList(composite);

 		messageLabel = new Label(composite, SWT.NONE);
 		gd = new GridData();
 		messageLabel.setLayoutData(gd);
 		messageLabel.setText(WebAppEditResourceHandler.getString("Qualifier__3")); //$NON-NLS-1$

 		fLowerList = createLowerList(composite);

 		fServletControl = composite;

 		if (fSelection == JSP)
 			fPageBook.showPage(fJspControl);
 		else
 			fPageBook.showPage(fServletControl);
 		return parent;
 	}

 	/**
 	 * Creates the list widget and sets layout data.
 	 * @return org.eclipse.swt.widgets.List
 	 */
 	private Table createLowerList(Composite parent) {
 		if (fLowerListLabel != null)
 			 (new Label(parent, SWT.NONE)).setText(fLowerListLabel);

 		Table list = new Table(parent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
 		list.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event evt) {
 				handleLowerSelectionChanged();
 			}
 		});
 		list.addListener(SWT.MouseDoubleClick, new Listener() {
 			public void handleEvent(Event evt) {
 				handleLowerDoubleClick();
 			}
 		});
 		list.addDisposeListener(new DisposeListener() {
 			public void widgetDisposed(DisposeEvent e) {
 				fQualifierRenderer.dispose();
 			}
 		});
 		GridData spec = new GridData();
 		spec.widthHint = convertWidthInCharsToPixels(50);
 		spec.heightHint = convertHeightInCharsToPixels(5);
 		spec.grabExcessVerticalSpace = true;
 		spec.grabExcessHorizontalSpace = true;
 		spec.horizontalAlignment = GridData.FILL;
 		spec.verticalAlignment = GridData.FILL;
 		list.setLayoutData(spec);
 		return list;
 	}

 	/**
 	 * Creates the text widget and sets layout data.
 	 * @return org.eclipse.swt.widgets.Text
 	 */
 	private Text createText(Composite parent) {
 		Text text = new Text(parent, SWT.BORDER);
 		GridData spec = new GridData();
 		spec.grabExcessVerticalSpace = false;
 		spec.grabExcessHorizontalSpace = true;
 		spec.horizontalAlignment = GridData.FILL;
 		spec.verticalAlignment = GridData.BEGINNING;
 		text.setLayoutData(spec);
 		Listener l = new Listener() {
 			public void handleEvent(Event evt) {
 				rematch(fText.getText());
 			}
 		};
 		text.addListener(SWT.Modify, l);
 		return text;
 	}

 	/**
 	 * Creates the list widget and sets layout data.
 	 * @return org.eclipse.swt.widgets.List
 	 */
 	private Table createUpperList(Composite parent) {
 		if (fUpperListLabel != null)
 			 (new Label(parent, SWT.NONE)).setText(fUpperListLabel);

 		Table list = new Table(parent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
 		list.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event evt) {
 				handleUpperSelectionChanged();
 			}
 		});
 		list.addListener(SWT.MouseDoubleClick, new Listener() {
 			public void handleEvent(Event evt) {
 				handleUpperDoubleClick();
 			}
 		});
 		list.addDisposeListener(new DisposeListener() {
 			public void widgetDisposed(DisposeEvent e) {
 				fElementRenderer.dispose();
 			}
 		});
 		GridData spec = new GridData();
 		spec.widthHint = convertWidthInCharsToPixels(50);
 		spec.heightHint = convertHeightInCharsToPixels(15);
 		spec.grabExcessVerticalSpace = true;
 		spec.grabExcessHorizontalSpace = true;
 		spec.horizontalAlignment = GridData.FILL;
 		spec.verticalAlignment = GridData.FILL;
 		list.setLayoutData(spec);
 		return list;
 	}

 	/**
 	 * @return the ID of the button that is 'pressed' on doubleClick in the lists.
 	 * By default it is the OK button.
 	 * Override to change this setting.
 	 */
 	protected int getDefaultButtonID() {
 		return IDialogConstants.OK_ID;
 	}

 	public int getSelectedItem() {
 		return fSelection;
 	}

 	protected Object getWidgetSelection() {
 		int i = fLowerList.getSelectionIndex();
 		if (fQualifierMap != null) {
 			if (fQualifierMap.length == 1)
 				i = 0;
 			if (i < 0) {
 				return null;
 			}
 			Integer index = fQualifierMap[i];
 			return fElements[index.intValue()];
 		}
 		return null;
 	}

 	protected final void handleLowerDoubleClick() {
 		if (getWidgetSelection() != null)
 			buttonPressed(getDefaultButtonID());
 	}

 	protected final void handleLowerSelectionChanged() {
 		updateOkState();
 	}

 	protected final void handleUpperDoubleClick() {
 		if (getWidgetSelection() != null)
 			buttonPressed(getDefaultButtonID());
 	}

 	protected final void handleUpperSelectionChanged() {
 		int selection = fUpperList.getSelectionIndex();
 		if (selection >= 0) {
 			int i = fElementMap[selection];
 			int k = i;
 			int length = fRenderedStrings.length;
 			while (k < length && fRenderedStrings[k].equals(fRenderedStrings[i])) {
 				k++;
 			}
 			updateLowerListWidget(i, k);
 		} else
 			updateLowerListWidget(0, 0);
 	}

 	public int open() {

 		if (fIT == null || fIT.length == 0) {
 			MessageDialog.openInformation(getShell(), WebAppEditResourceHandler.getString("Empty_List_1"), WebAppEditResourceHandler.getString("_INFO_No_servlets_exist_to_add._1"));  //$NON-NLS-2$ //$NON-NLS-1$
 			return CANCEL;
 		}

 		setElements(fIT);
 		setInitialSelection(""); //$NON-NLS-1$
 		return super.open();
 	}

 	/**
 	 * update the list to reflect a new match string.
 	 * @param matchString java.lang.String
 	 */
 	protected final void rematch(String matchString) {
 		int k = 0;
 		String text = fText.getText();
 		StringMatcher matcher = new StringMatcher(text + "*", fIgnoreCase, false); //$NON-NLS-1$
 		String lastString = null;
 		int length = fElements.length;
 		for (int i = 0; i < length; i++) {
 			while (i < length && fRenderedStrings[i].equals(lastString))
 				i++;
 			if (i < length) {
 				lastString = fRenderedStrings[i];
 				if (matcher.match(fRenderedStrings[i])) {
 					fElementMap[k] = i;
 					k++;
 				}
 			}
 		}
 		fElementMap[k] = -1;

 		updateUpperListWidget(fElementMap, k);
 	}

 	/**
 		 *
 		 * @return java.lang.String[]
 		 * @param p org.eclipse.jface.elements.IIndexedProperty
 		 */
 	private String[] renderStrings(Object[] p) {
 		String[] strings = new String[p.length];
 		int size = strings.length;
 		for (int i = 0; i < size; i++) {
 			strings[i] = fElementRenderer.getText(p[i]);
 		}
 		new TwoArrayQuickSorter(fIgnoreCase).sort(strings, p);
 		return strings;
 	}

 	public void setElements(Object[] elements) {
 		fElements = elements;
 		fElementMap = new int[fElements.length + 1];
 		fRenderedStrings = renderStrings(fElements);
 	}

 	public void setSelectedItem(int newSelection) {
 		fSelection = newSelection;
 	}

 	private void updateLowerListWidget(int from, int to) {
 		fLowerList.removeAll();
 		fQualifierMap = new Integer[to - from];
 		String[] qualifiers = new String[to - from];
 		for (int i = from; i < to; i++) {
 			// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
 			qualifiers[i - from] = fQualifierRenderer.getText(fElements[i]);
 			fQualifierMap[i - from] = new Integer(i);
 		}

 		new TwoArrayQuickSorter(fIgnoreCase).sort(qualifiers, fQualifierMap);

 		for (int i = 0; i < to - from; i++) {
 			TableItem ti = new TableItem(fLowerList, i);
 			ti.setText(qualifiers[i]);
 			// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
 			Image img = fQualifierRenderer.getImage(fElements[from + i]);
 			if (img != null)
 				ti.setImage(img);
 		}

 		if (fLowerList.getItemCount() > 0)
 			fLowerList.setSelection(0);
 		updateOkState();
 	}

 	private void updateOkState() {
 		Button okButton = getOkButton();
 		if (okButton != null)
 			okButton.setEnabled(getWidgetSelection() != null);
 	}

 	private void updateUpperListWidget(int[] indices, int size) {
 		fUpperList.setRedraw(false);
 		int itemCount = fUpperList.getItemCount();
 		if (size < itemCount)
 			fUpperList.remove(0, itemCount - size - 1);
 		TableItem[] items = fUpperList.getItems();
 		for (int i = 0; i < size; i++) {
 			TableItem ti = null;
 			if (i < itemCount)
 				ti = items[i];
 			else
 				ti = new TableItem(fUpperList, i);
 			ti.setText(fRenderedStrings[indices[i]]);
 			// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
 			Image img = fElementRenderer.getImage(fElements[indices[i]]);
 			if (img != null)
 				ti.setImage(img);
 		}
 		if (fUpperList.getItemCount() > 0)
 			fUpperList.setSelection(0);
 		fUpperList.setRedraw(true);
 		handleUpperSelectionChanged();
 	}

 	/**
 	 * Sent when default selection occurs in the control.
 	 * <p>
 	 * For example, on some platforms default selection occurs
 	 * in a List when the user double-clicks an item or types
 	 * return in a Text.
 	 * </p>
 	 *
 	 * @param e an event containing information about the default selection
 	 */
 	public void widgetDefaultSelected(SelectionEvent e) {
 		// Do nothing
 	}

 	/**
 	 * Sent when selection occurs in the control.
 	 * <p>
 	 * For example, on some platforms selection occurs in
 	 * a List when the user selects an item or items.
 	 * </p>
 	 *
 	 * @param e an event containing information about the selection
 	 */
 	public void widgetSelected(SelectionEvent e) {
 		if (e.widget == fJSPButton) {
 			fSelection = JSP;
 			fPageBook.showPage(fJspControl);
 			updateOKStatus();
 		} else if (e.widget == fServletButton) {
 			fSelection = SERVLET;
 			fPageBook.showPage(fServletControl);
 		} else
 			fSelection = -1;
 	}

 	/**
 	 * @see ElementTreeSelectionDialog#updateOKStatus()
 	 */
 	protected void updateOKStatus() {
 		super.updateOKStatus();
 		Button okButton = getOkButton();
 		if (okButton != null)
 			okButton.setEnabled(fLocalValidator.validate(getResult()).isOK());
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2003, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Kaloyan Raev, kaloyan.raev@sap.com
	*******************************************************************************/
	package org.eclipse.jst.servlet.ui.internal.wizard;

	import static org.eclipse.jst.j2ee.web.IServletConstants.QUALIFIED_SERVLET;
	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.DEFAULT_PACKAGE;

	import java.util.ArrayList;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.IType;
	import org.eclipse.jdt.core.ITypeHierarchy;
	import org.eclipse.jdt.ui.ISharedImages;
	import org.eclipse.jdt.ui.JavaUI;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.operation.IRunnableContext;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jst.j2ee.internal.dialogs.FilteredFileSelectionDialog;
	import org.eclipse.jst.j2ee.internal.dialogs.TwoArrayQuickSorter;
	import org.eclipse.jst.j2ee.internal.dialogs.TypedFileViewerFilter;
	import org.eclipse.jst.j2ee.internal.web.providers.WebAppEditResourceHandler;
	import org.eclipse.jst.servlet.ui.internal.plugin.ServletUIPlugin;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.DisposeListener;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	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.Control;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
	import org.eclipse.ui.dialogs.ISelectionStatusValidator;
	import org.eclipse.ui.part.PageBook;

	/**
	* Insert the type's description here.
	* Creation date: (7/30/2001 11:16:36 AM)
	*/
	public class MultiSelectFilteredFileSelectionDialog extends
	FilteredFileSelectionDialog implements SelectionListener {


	private static class PackageRenderer extends LabelProvider {
	private final Image PACKAGE_ICON = JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_PACKAGE);

	public String getText(Object element) {
	IType type = (IType) element;
	String p = type.getPackageFragment().getElementName();
	if ("".equals(p)) //$NON-NLS-1$
	p = DEFAULT_PACKAGE;
	return (p + " - " + type.getPackageFragment().getParent().getPath().toString()); //$NON-NLS-1$
	}
	public Image getImage(Object element) {
	return PACKAGE_ICON;
	}
	}

	private static class TypeRenderer extends LabelProvider {
	private final Image CLASS_ICON = JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);

	public String getText(Object element) {
	IType e = ((IType) element);
	return e.getElementName();
	}

	public Image getImage(Object element) {
	return CLASS_ICON;
	}

	}
	public final static int JSP = 0;
	public final static int SERVLET = 1;
	protected Button fServletButton;
	protected Button fJSPButton;
	protected int fSelection = -1;
	protected PageBook fPageBook = null;
	protected Control fJspControl = null;
	protected Control fServletControl = null;
	protected Composite fChild = null;
	// construction parameters
	protected IRunnableContext fRunnableContext;
	protected ILabelProvider fElementRenderer;
	protected ILabelProvider fQualifierRenderer;
	private Object[] fElements;
	private boolean fIgnoreCase = true;
	private String fUpperListLabel;
	private String fLowerListLabel;
	// SWT widgets
	private Table fUpperList;
	private Table fLowerList;
	protected Text fText;
	private IType[] fIT;
	private String[] fRenderedStrings;
	private int[] fElementMap;
	private Integer[] fQualifierMap;

	private ISelectionStatusValidator fLocalValidator = null;
	/**
	* MultiSelectFilteredFileSelectionDialog constructor comment.
	* @param parent Shell
	* @param title String
	* @param message String
	* @parent extensions String[]
	* @param allowMultiple boolean
	*/
	public MultiSelectFilteredFileSelectionDialog(Shell parent, String title, String message, String[] extensions, boolean allowMultiple, IProject project) {
	super(parent, title, message, extensions, allowMultiple);
	setShellStyle(SWT.DIALOG_TRIM \| SWT.APPLICATION_MODAL \| SWT.RESIZE);

	if (title == null)
	setTitle(WebAppEditResourceHandler.getString("File_Selection_UI_")); //$NON-NLS-1$
	if (message == null)
	message = WebAppEditResourceHandler.getString("Select_a_file__UI_"); //$NON-NLS-1$
	setMessage(message);
	setExtensions(extensions);
	addFilter(new TypedFileViewerFilter(extensions));
	fLocalValidator = new SimpleTypedElementSelectionValidator(new Class[] { IFile.class }, allowMultiple);
	setValidator(fLocalValidator);

	//StatusInfo currStatus = new StatusInfo();
	//currStatus.setOK();
	Status currStatus = new Status(Status.OK, ServletUIPlugin.PLUGIN_ID, Status.OK, "", null);

	updateStatus(currStatus);
	fElementRenderer = new TypeRenderer();
	fQualifierRenderer = new PackageRenderer();
	fRunnableContext = ServletUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
	try {
	IJavaElement jelem = null;
	IProject proj = null;
	jelem = (IJavaElement) project.getAdapter(IJavaElement.class);
	if (jelem == null) {
	IResource resource = (IResource) project.getAdapter(IResource.class);
	if (resource != null) {
	proj = resource.getProject();
	if (proj != null) {
	jelem = org.eclipse.jdt.core.JavaCore.create(proj);
	}
	}
	}
	IJavaProject jp = jelem.getJavaProject();

	IType servletType = jp.findType(QUALIFIED_SERVLET);
	// next 3 lines fix defect 177686
	if (servletType == null) {
	return;
	}

	ArrayList servletClasses = new ArrayList();
	ITypeHierarchy tH = servletType.newTypeHierarchy(jp, null);
	IType[] types = tH.getAllSubtypes(servletType);
	for (int i = 0; i < types.length; i++) {
	if (types[i].isClass() && !servletClasses.contains(types[i]))
	servletClasses.add(types[i]);
	}
	fIT = (IType[]) servletClasses.toArray(new IType[servletClasses.size()]);
	servletClasses = null;

	} catch (Exception e) {
	ServletUIPlugin.log(e);
	}
	}

	/**
	* @private
	*/
	protected void computeResult() {
	if (fSelection == JSP) {
	super.computeResult();
	} else {
	IType type = (IType) getWidgetSelection();
	if (type != null) {
	if (type == null) {
	String title = WebAppEditResourceHandler.getString("Select_Class_UI_"); //$NON-NLS-1$ = "Select Class"
	String message = WebAppEditResourceHandler.getString("Could_not_uniquely_map_the_ERROR_"); //$NON-NLS-1$ = "Could not uniquely map the class name to a class."
	MessageDialog.openError(getShell(), title, message);
	setResult(null);
	} else {
	java.util.List result = new ArrayList(1);
	result.add(type);
	setResult(result);
	}
	}
	}
	}

	public void create() {
	super.create();
	fText.setFocus();
	rematch(""); //$NON-NLS-1$
	updateOkState();
	}

	/**
	* Creates and returns the contents of this dialog's
	* button bar.
	* <p>
	* The <code>Dialog</code> implementation of this framework method
	* lays out a button bar and calls the <code>createButtonsForButtonBar</code>
	* framework method to populate it. Subclasses may override.
	* </p>
	*
	* @param parent the parent composite to contain the button bar
	* @return the button bar control
	*/
	protected Control createButtonBar(Composite parent) {

	Composite composite = new Composite(parent, SWT.NULL);
	GridLayout layout = new GridLayout();

	layout.numColumns = 2;

	layout.marginHeight = 0;
	layout.marginWidth = 0;
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	Composite composite2 = new Composite(composite, SWT.NONE);

	// create a layout with spacing and margins appropriate for the font size.
	layout = new GridLayout();
	layout.numColumns = 0; // this is incremented by createButton
	layout.makeColumnsEqualWidth = true;
	layout.marginWidth = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_MARGIN);
	layout.marginHeight = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_MARGIN);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_SPACING);
	layout.verticalSpacing = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_SPACING);

	composite2.setLayout(layout);

	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END \| GridData.VERTICAL_ALIGN_CENTER);
	composite2.setLayoutData(data);

	composite2.setFont(parent.getFont());

	// Add the buttons to the button bar.
	super.createButtonsForButtonBar(composite2);

	return composite;
	}

	/*
	* @private
	*/
	protected Control createDialogArea(Composite parent) {
	GridData gd = new GridData();

	fChild = new Composite(parent, SWT.NONE);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(fChild, "com.ibm.etools.webapplicationedit.webx2010"); //$NON-NLS-1$
	GridLayout gl = new GridLayout();
	gl.numColumns = 2;
	gl.marginHeight = 0;
	fChild.setLayout(gl);

	gd.verticalAlignment = GridData.FILL;
	gd.grabExcessVerticalSpace = true;
	fChild.setLayoutData(gd);

	// Create the Web Type radio buttons and text fields.
	fServletButton = new Button(fChild, SWT.RADIO);
	fServletButton.setText(WebAppEditResourceHandler.getString("Servlet_UI_")); //$NON-NLS-1$ = Servlet
	gd = new GridData();
	fServletButton.setLayoutData(gd);
	fServletButton.addSelectionListener(this);

	fJSPButton = new Button(fChild, SWT.RADIO);
	fJSPButton.setText("JSP"); //$NON-NLS-1$
	gd = new GridData();
	fJSPButton.setLayoutData(gd);
	fJSPButton.addSelectionListener(this);

	if (fSelection == JSP)
	fJSPButton.setSelection(true);
	else {
	fServletButton.setSelection(true);
	fSelection = SERVLET;
	}

	fPageBook = new PageBook(fChild, SWT.NONE);
	gd = new GridData();
	gd.horizontalAlignment = GridData.FILL;
	gd.verticalAlignment = GridData.FILL;
	gd.grabExcessHorizontalSpace = true;
	gd.grabExcessVerticalSpace = true;
	gd.horizontalSpan = 2;
	fPageBook.setLayoutData(gd);
	fJspControl = super.createDialogArea(fPageBook);

	Composite composite = new Composite(fPageBook, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
	layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
	layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(GridData.FILL_BOTH));
	composite.setFont(parent.getFont());

	Label messageLabel = new Label(composite, SWT.NONE);
	gd = new GridData();
	messageLabel.setLayoutData(gd);
	messageLabel.setText(WebAppEditResourceHandler.getString("Choose_a_servlet__1")); //$NON-NLS-1$

	fText = createText(composite);

	messageLabel = new Label(composite, SWT.NONE);
	gd = new GridData();
	messageLabel.setLayoutData(gd);
	messageLabel.setText(WebAppEditResourceHandler.getString("Matching_servlets__2")); //$NON-NLS-1$

	fUpperList = createUpperList(composite);

	messageLabel = new Label(composite, SWT.NONE);
	gd = new GridData();
	messageLabel.setLayoutData(gd);
	messageLabel.setText(WebAppEditResourceHandler.getString("Qualifier__3")); //$NON-NLS-1$

	fLowerList = createLowerList(composite);

	fServletControl = composite;

	if (fSelection == JSP)
	fPageBook.showPage(fJspControl);
	else
	fPageBook.showPage(fServletControl);
	return parent;
	}

	/**
	* Creates the list widget and sets layout data.
	* @return org.eclipse.swt.widgets.List
	*/
	private Table createLowerList(Composite parent) {
	if (fLowerListLabel != null)
	(new Label(parent, SWT.NONE)).setText(fLowerListLabel);

	Table list = new Table(parent, SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL);
	list.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event evt) {
	handleLowerSelectionChanged();
	}
	});
	list.addListener(SWT.MouseDoubleClick, new Listener() {
	public void handleEvent(Event evt) {
	handleLowerDoubleClick();
	}
	});
	list.addDisposeListener(new DisposeListener() {
	public void widgetDisposed(DisposeEvent e) {
	fQualifierRenderer.dispose();
	}
	});
	GridData spec = new GridData();
	spec.widthHint = convertWidthInCharsToPixels(50);
	spec.heightHint = convertHeightInCharsToPixels(5);
	spec.grabExcessVerticalSpace = true;
	spec.grabExcessHorizontalSpace = true;
	spec.horizontalAlignment = GridData.FILL;
	spec.verticalAlignment = GridData.FILL;
	list.setLayoutData(spec);
	return list;
	}

	/**
	* Creates the text widget and sets layout data.
	* @return org.eclipse.swt.widgets.Text
	*/
	private Text createText(Composite parent) {
	Text text = new Text(parent, SWT.BORDER);
	GridData spec = new GridData();
	spec.grabExcessVerticalSpace = false;
	spec.grabExcessHorizontalSpace = true;
	spec.horizontalAlignment = GridData.FILL;
	spec.verticalAlignment = GridData.BEGINNING;
	text.setLayoutData(spec);
	Listener l = new Listener() {
	public void handleEvent(Event evt) {
	rematch(fText.getText());
	}
	};
	text.addListener(SWT.Modify, l);
	return text;
	}

	/**
	* Creates the list widget and sets layout data.
	* @return org.eclipse.swt.widgets.List
	*/
	private Table createUpperList(Composite parent) {
	if (fUpperListLabel != null)
	(new Label(parent, SWT.NONE)).setText(fUpperListLabel);

	Table list = new Table(parent, SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL);
	list.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event evt) {
	handleUpperSelectionChanged();
	}
	});
	list.addListener(SWT.MouseDoubleClick, new Listener() {
	public void handleEvent(Event evt) {
	handleUpperDoubleClick();
	}
	});
	list.addDisposeListener(new DisposeListener() {
	public void widgetDisposed(DisposeEvent e) {
	fElementRenderer.dispose();
	}
	});
	GridData spec = new GridData();
	spec.widthHint = convertWidthInCharsToPixels(50);
	spec.heightHint = convertHeightInCharsToPixels(15);
	spec.grabExcessVerticalSpace = true;
	spec.grabExcessHorizontalSpace = true;
	spec.horizontalAlignment = GridData.FILL;
	spec.verticalAlignment = GridData.FILL;
	list.setLayoutData(spec);
	return list;
	}

	/**
	* @return the ID of the button that is 'pressed' on doubleClick in the lists.
	* By default it is the OK button.
	* Override to change this setting.
	*/
	protected int getDefaultButtonID() {
	return IDialogConstants.OK_ID;
	}

	public int getSelectedItem() {
	return fSelection;
	}

	protected Object getWidgetSelection() {
	int i = fLowerList.getSelectionIndex();
	if (fQualifierMap != null) {
	if (fQualifierMap.length == 1)
	i = 0;
	if (i < 0) {
	return null;
	}
	Integer index = fQualifierMap[i];
	return fElements[index.intValue()];
	}
	return null;
	}

	protected final void handleLowerDoubleClick() {
	if (getWidgetSelection() != null)
	buttonPressed(getDefaultButtonID());
	}

	protected final void handleLowerSelectionChanged() {
	updateOkState();
	}

	protected final void handleUpperDoubleClick() {
	if (getWidgetSelection() != null)
	buttonPressed(getDefaultButtonID());
	}

	protected final void handleUpperSelectionChanged() {
	int selection = fUpperList.getSelectionIndex();
	if (selection >= 0) {
	int i = fElementMap[selection];
	int k = i;
	int length = fRenderedStrings.length;
	while (k < length && fRenderedStrings[k].equals(fRenderedStrings[i])) {
	k++;
	}
	updateLowerListWidget(i, k);
	} else
	updateLowerListWidget(0, 0);
	}

	public int open() {

	if (fIT == null \|\| fIT.length == 0) {
	MessageDialog.openInformation(getShell(), WebAppEditResourceHandler.getString("Empty_List_1"), WebAppEditResourceHandler.getString("_INFO_No_servlets_exist_to_add._1")); //$NON-NLS-2$ //$NON-NLS-1$
	return CANCEL;
	}

	setElements(fIT);
	setInitialSelection(""); //$NON-NLS-1$
	return super.open();
	}

	/**
	* update the list to reflect a new match string.
	* @param matchString java.lang.String
	*/
	protected final void rematch(String matchString) {
	int k = 0;
	String text = fText.getText();
	StringMatcher matcher = new StringMatcher(text + "*", fIgnoreCase, false); //$NON-NLS-1$
	String lastString = null;
	int length = fElements.length;
	for (int i = 0; i < length; i++) {
	while (i < length && fRenderedStrings[i].equals(lastString))
	i++;
	if (i < length) {
	lastString = fRenderedStrings[i];
	if (matcher.match(fRenderedStrings[i])) {
	fElementMap[k] = i;
	k++;
	}
	}
	}
	fElementMap[k] = -1;

	updateUpperListWidget(fElementMap, k);
	}

	/**
	*
	* @return java.lang.String[]
	* @param p org.eclipse.jface.elements.IIndexedProperty
	*/
	private String[] renderStrings(Object[] p) {
	String[] strings = new String[p.length];
	int size = strings.length;
	for (int i = 0; i < size; i++) {
	strings[i] = fElementRenderer.getText(p[i]);
	}
	new TwoArrayQuickSorter(fIgnoreCase).sort(strings, p);
	return strings;
	}

	public void setElements(Object[] elements) {
	fElements = elements;
	fElementMap = new int[fElements.length + 1];
	fRenderedStrings = renderStrings(fElements);
	}

	public void setSelectedItem(int newSelection) {
	fSelection = newSelection;
	}

	private void updateLowerListWidget(int from, int to) {
	fLowerList.removeAll();
	fQualifierMap = new Integer[to - from];
	String[] qualifiers = new String[to - from];
	for (int i = from; i < to; i++) {
	// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
	qualifiers[i - from] = fQualifierRenderer.getText(fElements[i]);
	fQualifierMap[i - from] = new Integer(i);
	}

	new TwoArrayQuickSorter(fIgnoreCase).sort(qualifiers, fQualifierMap);

	for (int i = 0; i < to - from; i++) {
	TableItem ti = new TableItem(fLowerList, i);
	ti.setText(qualifiers[i]);
	// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
	Image img = fQualifierRenderer.getImage(fElements[from + i]);
	if (img != null)
	ti.setImage(img);
	}

	if (fLowerList.getItemCount() > 0)
	fLowerList.setSelection(0);
	updateOkState();
	}

	private void updateOkState() {
	Button okButton = getOkButton();
	if (okButton != null)
	okButton.setEnabled(getWidgetSelection() != null);
	}

	private void updateUpperListWidget(int[] indices, int size) {
	fUpperList.setRedraw(false);
	int itemCount = fUpperList.getItemCount();
	if (size < itemCount)
	fUpperList.remove(0, itemCount - size - 1);
	TableItem[] items = fUpperList.getItems();
	for (int i = 0; i < size; i++) {
	TableItem ti = null;
	if (i < itemCount)
	ti = items[i];
	else
	ti = new TableItem(fUpperList, i);
	ti.setText(fRenderedStrings[indices[i]]);
	// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
	Image img = fElementRenderer.getImage(fElements[indices[i]]);
	if (img != null)
	ti.setImage(img);
	}
	if (fUpperList.getItemCount() > 0)
	fUpperList.setSelection(0);
	fUpperList.setRedraw(true);
	handleUpperSelectionChanged();
	}

	/**
	* Sent when default selection occurs in the control.
	* <p>
	* For example, on some platforms default selection occurs
	* in a List when the user double-clicks an item or types
	* return in a Text.
	* </p>
	*
	* @param e an event containing information about the default selection
	*/
	public void widgetDefaultSelected(SelectionEvent e) {
	// Do nothing
	}

	/**
	* Sent when selection occurs in the control.
	* <p>
	* For example, on some platforms selection occurs in
	* a List when the user selects an item or items.
	* </p>
	*
	* @param e an event containing information about the selection
	*/
	public void widgetSelected(SelectionEvent e) {
	if (e.widget == fJSPButton) {
	fSelection = JSP;
	fPageBook.showPage(fJspControl);
	updateOKStatus();
	} else if (e.widget == fServletButton) {
	fSelection = SERVLET;
	fPageBook.showPage(fServletControl);
	} else
	fSelection = -1;
	}

	/**
	* @see ElementTreeSelectionDialog#updateOKStatus()
	*/
	protected void updateOKStatus() {
	super.updateOKStatus();
	Button okButton = getOkButton();
	if (okButton != null)
	okButton.setEnabled(fLocalValidator.validate(getResult()).isOK());
	}

	}