Java tutorial
/*==========================================================================*\ | $Id: OgnlExpressionBuilder.java,v 1.1 2010/05/11 15:52:46 aallowat Exp $ |*-------------------------------------------------------------------------*| | Copyright (C) 2006-2008 Virginia Tech | | This file is part of Web-CAT. | | Web-CAT is free software; you can redistribute it and/or modify | it under the terms of the GNU Affero General Public License as published | by the Free Software Foundation; either version 3 of the License, or | (at your option) any later version. | | Web-CAT is distributed in the hope that it will be useful, | but WITHOUT ANY WARRANTY; without even the implied warranty of | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | GNU General Public License for more details. | | You should have received a copy of the GNU Affero General Public License | along with Web-CAT; if not, see <http://www.gnu.org/licenses/>. \*==========================================================================*/ package org.webcat.oda.designer.ognl; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.source.CompositeRuler; import org.eclipse.jface.text.source.LineNumberRulerColumn; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.ToolBar; import org.eclipse.swt.widgets.ToolItem; import org.webcat.oda.designer.i18n.Messages; import org.webcat.oda.designer.impl.WebCATKeyProvider; import org.webcat.oda.designer.widgets.KeyPathBrowser; //------------------------------------------------------------------------ /** * TODO: real description * * @author Tony Allevato (Virginia Tech Computer Science) * @version $Id: OgnlExpressionBuilder.java,v 1.1 2010/05/11 15:52:46 aallowat Exp $ */ public class OgnlExpressionBuilder extends TitleAreaDialog { //~ Constructor ........................................................... // ---------------------------------------------------------- /** * * @param parentShell * @param rootClass * @param initialExpr */ public OgnlExpressionBuilder(Shell parentShell, String rootClass, String initialExpr) { super(parentShell); expression = initialExpr; rootClassName = rootClass; keyProvider = new WebCATKeyProvider(); Font font = JFaceResources.getDefaultFont(); FontData[] fd = font.getFontData(); fd[0].setStyle(fd[0].getStyle() | SWT.BOLD); boldFont = new Font(parentShell.getDisplay(), fd[0]); } @Override protected void handleShellCloseEvent() { keyProvider.dispose(); boldFont.dispose(); super.handleShellCloseEvent(); } //~ Methods ............................................................... // ---------------------------------------------------------- /** * */ protected void setShellStyle(int newShellStyle) { newShellStyle |= SWT.MAX | SWT.RESIZE; super.setShellStyle(newShellStyle); } // ---------------------------------------------------------- /** * */ @Override protected Control createContents(Composite parent) { Control control = super.createContents(parent); setTitle(Messages.EXPR_BUILDER_TITLE); setMessage(Messages.EXPR_BUILDER_PROMPT); return control; } // ---------------------------------------------------------- /** * */ protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); createToolbar(composite); SashForm sash = new SashForm(composite, SWT.VERTICAL | SWT.SMOOTH); GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true); sash.setLayoutData(gd); createEditor(sash); createBrowser(sash); sash.setWeights(new int[] { 50, 50 }); editor.getControl().setFocus(); return composite; } // ---------------------------------------------------------- private SelectionAdapter selectionAdapterForTemplate(final String template) { return new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { OgnlBuilderTemplates.insertTemplate(editor, template); editor.getControl().setFocus(); } }; } // ---------------------------------------------------------- private void addTemplateButton(String title, String tooltip, String template) { ToolItem toolItem = new ToolItem(templateBar, SWT.PUSH); toolItem.setText(title); toolItem.setToolTipText(tooltip); toolItem.addSelectionListener(selectionAdapterForTemplate(template)); } // ---------------------------------------------------------- private void addTemplateSeparator() { new ToolItem(templateBar, SWT.SEPARATOR); } // ---------------------------------------------------------- private void createTemplateMenu() { mathTemplateMenu = new Menu(templateBar); MenuItem item; item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("min"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_MIN)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("max"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_MAX)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("floor"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_FLOOR)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("ceil"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_CEIL)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("round"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_ROUND)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("abs"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_ABS)); item = new MenuItem(mathTemplateMenu, SWT.PUSH); item.setText("signum"); //$NON-NLS-1$ item.addSelectionListener(selectionAdapterForTemplate(OgnlBuilderTemplates.TEMPLATE_SIGNUM)); } // ---------------------------------------------------------- /** * * @param parent */ private void createToolbar(Composite parent) { GridData gd; Composite composite = new Composite(parent, SWT.NONE); gd = new GridData(SWT.FILL, SWT.TOP, true, false); GridLayout layout = new GridLayout(2, false); composite.setLayout(layout); Label label = new Label(composite, SWT.NONE); label.setText(Messages.EXPR_BUILDER_OGNL_TEMPLATES); gd = new GridData(SWT.FILL, SWT.CENTER, true, false); templateBar = new ToolBar(composite, SWT.FLAT | SWT.WRAP | SWT.TRAIL); gd = new GridData(SWT.FILL, SWT.TOP, true, true); templateBar.setLayoutData(gd); createTemplateMenu(); final ToolItem toolItem = new ToolItem(templateBar, SWT.PUSH); toolItem.setText(Messages.EXPR_BUILDER_MATH); toolItem.setToolTipText(Messages.EXPR_BUILDER_MATH_TOOLTIP); toolItem.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { Point pt = templateBar.toDisplay(toolItem.getBounds().x, toolItem.getBounds().y + toolItem.getBounds().height); mathTemplateMenu.setLocation(pt); mathTemplateMenu.setVisible(true); } }); addTemplateSeparator(); addTemplateButton(Messages.EXPR_BUILDER_LIST, Messages.EXPR_BUILDER_LIST_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_LIST); addTemplateButton(Messages.EXPR_BUILDER_MAP, Messages.EXPR_BUILDER_MAP_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_MAP); addTemplateSeparator(); addTemplateButton(Messages.EXPR_BUILDER_SELECT_ALL, Messages.EXPR_BUILDER_SELECT_ALL_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_SELECT_ALL); addTemplateButton(Messages.EXPR_BUILDER_SELECT_FIRST, Messages.EXPR_BUILDER_SELECT_FIRST_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_SELECT_FIRST); addTemplateButton(Messages.EXPR_BUILDER_SELECT_LAST, Messages.EXPR_BUILDER_SELECT_LAST_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_SELECT_LAST); addTemplateSeparator(); addTemplateButton(Messages.EXPR_BUILDER_LAMBDA, Messages.EXPR_BUILDER_LAMBDA_TOOLTIP, OgnlBuilderTemplates.TEMPLATE_LAMBDA); } // ---------------------------------------------------------- /** * * @param parent */ private void createEditor(Composite parent) { GridLayout layout = new GridLayout(); layout.marginWidth = layout.marginHeight = 0; Composite composite = new Composite(parent, SWT.BORDER | SWT.LEFT_TO_RIGHT); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); composite.setLayout(layout); CompositeRuler ruler = new CompositeRuler(); ruler.addDecorator(0, new LineNumberRulerColumn()); editor = new SourceViewer(composite, ruler, SWT.H_SCROLL | SWT.V_SCROLL); editor.configure( new OgnlSourceViewerConfiguration(new OgnlSyntaxContext(rootClassName, keyProvider, keyProvider))); if (expression != null) { OgnlEditorInput editorInput = new OgnlEditorInput(expression); OgnlDocumentProvider documentProvider = new OgnlDocumentProvider(); try { documentProvider.connect(editorInput); } catch (CoreException e) { e.printStackTrace(); } IDocument document = documentProvider.getDocument(editorInput); editor.setDocument(document); } GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true); gd.heightHint = 144; editor.getControl().setLayoutData(gd); } // ---------------------------------------------------------- /** * * @param parent */ private void createBrowser(Composite parent) { GridLayout layout = new GridLayout(); layout.marginWidth = layout.marginHeight = 0; Composite composite = new Composite(parent, SWT.BORDER | SWT.LEFT_TO_RIGHT); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); composite.setLayout(layout); GridData gd; Composite keyPathComposite = new Composite(composite, SWT.NONE); layout = new GridLayout(2, false); keyPathComposite.setLayout(layout); gd = new GridData(SWT.FILL, SWT.FILL, true, false); keyPathComposite.setLayoutData(gd); Label label = new Label(keyPathComposite, SWT.NONE); label.setFont(boldFont); label.setText(Messages.EXPR_BUILDER_CURRENT_KEY_PATH); gd = new GridData(SWT.LEFT, SWT.CENTER, false, false); label.setLayoutData(gd); selectedKeyPathLabel = new Label(keyPathComposite, SWT.NONE); gd = new GridData(SWT.FILL, SWT.CENTER, true, false); selectedKeyPathLabel.setLayoutData(gd); browser = new KeyPathBrowser(composite, SWT.BORDER); gd = new GridData(SWT.FILL, SWT.FILL, true, true); gd.heightHint = 144; browser.setLayoutData(gd); browser.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { Point range = editor.getSelectedRange(); try { editor.getDocument().replace(range.x, range.y, browser.getSelectedKeyPath()); editor.getControl().setFocus(); } catch (BadLocationException e1) { // Ignore exception. } } public void widgetSelected(SelectionEvent e) { selectedKeyPathLabel.setText(browser.getSelectedKeyPath()); } }); browser.setKeyProvider(keyProvider); browser.setKeyLabelProvider(keyProvider); browser.setRootClassName(rootClassName); } // ---------------------------------------------------------- /** * */ protected void okPressed() { expression = editor.getTextWidget().getText().trim(); super.okPressed(); } // ---------------------------------------------------------- /** * Gets the OGNL expression entered into the expression builder. * * @return the expression entered into the builder */ public String getExpression() { return expression; } //~ Static/instance variables ............................................. private Font boldFont; private ToolBar templateBar; private Menu mathTemplateMenu; private SourceViewer editor; private Label selectedKeyPathLabel; private String rootClassName; private WebCATKeyProvider keyProvider; private KeyPathBrowser browser; private String expression; }