Java tutorial
/******************************************************************************* * Copyright (c) 2007, 2010 Spring IDE Developers * 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: * Spring IDE Developers - initial API and implementation *******************************************************************************/ package org.springframework.ide.eclipse.webflow.ui.graph.dialogs; import ognl.Ognl; import ognl.OgnlException; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.viewers.DecoratingLabelProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; 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.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.springframework.ide.eclipse.webflow.core.internal.model.WebflowModelXmlUtils; import org.springframework.ide.eclipse.webflow.core.model.ICloneableModelElement; import org.springframework.ide.eclipse.webflow.core.model.IDecisionState; import org.springframework.ide.eclipse.webflow.core.model.IIf; import org.springframework.ide.eclipse.webflow.core.model.IState; import org.springframework.ide.eclipse.webflow.core.model.IWebflowModelElement; import org.springframework.ide.eclipse.webflow.ui.graph.model.WebflowModelLabelDecorator; import org.springframework.ide.eclipse.webflow.ui.graph.model.WebflowModelLabelProvider; /** * @author Christian Dupuis */ public class IfPropertiesDialog extends TitleAreaDialog { /** * */ private static final String EXPRESSION_PREFIX = "${"; /** * */ private static final String EXPRESSION_SUFFIX = "}"; /** * */ private Button browseElseButton; /** * */ private Button browseThenButton; /** * */ private SelectionListener buttonListener = new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { handleButtonPressed((Button) e.widget); } }; /** * */ private IIf cloneIf; /** * */ private Text elseText; /** * */ private boolean isNew = false; /** * */ private int LABEL_WIDTH = 70; /** * */ private Button ognlButton; /** * */ private Button okButton; /** * */ private Text onText; /** * */ private IDecisionState parent; /** * */ private IIf theIf; /** * */ private Text thenText; /** * * * @param parentShell * @param state * @param newMode * @param parent */ public IfPropertiesDialog(Shell parentShell, IDecisionState parent, IIf state, boolean newMode) { super(parentShell); this.theIf = state; this.parent = parent; this.cloneIf = (IIf) ((ICloneableModelElement<IIf>) this.theIf).cloneModelElement(); this.isNew = newMode; } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int) */ protected void buttonPressed(int buttonId) { if (buttonId == IDialogConstants.OK_ID) { this.cloneIf.setTest(trimString(getTest())); if (isNew) { if (this.thenText != null && this.thenText.getText() != null && !"".equals(this.thenText.getText())) { // this.theIf.setThenTransition(new IfTransition( // (ITransitionableTo) WebFlowCoreUtils.getStateById( // parent, this.thenText.getText()), // this.theIf, true)); } if (this.elseText != null && this.elseText.getText() != null && !"".equals(this.elseText.getText())) { // this.theIf.setElseTransition(new IfTransition( // (ITransitionableTo) WebFlowCoreUtils.getStateById( // parent, this.elseText.getText()), // this.theIf, false)); } } ((ICloneableModelElement<IIf>) this.theIf).applyCloneValues(this.cloneIf); } super.buttonPressed(buttonId); } /* (non-Javadoc) * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell) */ protected void configureShell(Shell shell) { super.configureShell(shell); shell.setText(getShellTitle()); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) */ protected void createButtonsForButtonBar(Composite parent) { // create OK and Cancel buttons by default okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); // do this here because setting the text will set enablement on the // ok button onText.setFocus(); if (this.theIf != null && this.theIf.getTest() != null) { okButton.setEnabled(true); } else { okButton.setEnabled(false); } } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.TitleAreaDialog#createContents(org.eclipse.swt.widgets.Composite) */ protected Control createContents(Composite parent) { Control contents = super.createContents(parent); setTitle(getTitle()); setMessage(getMessage()); return contents; } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.TitleAreaDialog#createDialogArea(org.eclipse.swt.widgets.Composite) */ protected Control createDialogArea(Composite parent) { Composite parentComposite = (Composite) super.createDialogArea(parent); Composite composite = new Composite(parentComposite, SWT.NULL); GridLayout layout = new GridLayout(); layout.numColumns = 1; composite.setLayout(layout); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); Composite nameGroup = new Composite(composite, SWT.NULL); nameGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); GridLayout layout1 = new GridLayout(); layout1.numColumns = 2; layout1.marginWidth = 5; nameGroup.setLayout(layout1); Label onLabel = new Label(nameGroup, SWT.NONE); onLabel.setText("Test"); onText = new Text(nameGroup, SWT.SINGLE | SWT.BORDER); if (this.theIf != null && this.theIf.getTest() != null) { this.onText.setText(this.theIf.getTest()); } onText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); onText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validateInput(); } }); new Label(nameGroup, SWT.NONE); ognlButton = new Button(nameGroup, SWT.CHECK); ognlButton.setText("Parse OGNL transition criteria"); ognlButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { validateInput(); } }); if (this.isNew) { // Group for attribute mapper settings. Group groupActionType = new Group(composite, SWT.NULL); GridLayout layoutAttMap = new GridLayout(); layoutAttMap.marginWidth = 3; layoutAttMap.marginHeight = 3; groupActionType.setLayout(layoutAttMap); groupActionType.setText(" Transition Tragets "); groupActionType.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Composite methodComposite = new Composite(groupActionType, SWT.NONE); methodComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); GridLayout layout3 = new GridLayout(); layout3.marginHeight = 3; layout3.marginWidth = 5; layout3.numColumns = 3; methodComposite.setLayout(layout3); Label thenLabel = new Label(methodComposite, SWT.NONE); GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gridData.widthHint = LABEL_WIDTH; thenLabel.setLayoutData(gridData); thenLabel.setText("Then"); thenText = new Text(methodComposite, SWT.SINGLE | SWT.BORDER); thenText.setEditable(false); if (this.theIf != null && this.theIf.getThenTransition() != null && this.theIf.getThenTransition().getToState() != null) { thenText.setText(this.theIf.getThenTransition().getToState().getId()); } thenText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); thenText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validateInput(); } }); browseThenButton = new Button(methodComposite, SWT.PUSH); browseThenButton.setText("..."); browseThenButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END)); browseThenButton.addSelectionListener(buttonListener); // Label field. Label elseLabel = new Label(methodComposite, SWT.NONE); gridData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gridData.widthHint = LABEL_WIDTH; elseLabel.setLayoutData(gridData); // Add the text box for action classname. elseText = new Text(methodComposite, SWT.SINGLE | SWT.BORDER); if (this.theIf != null && this.theIf.getElseTransition() != null && this.theIf.getElseTransition().getToState() != null) { elseText.setText(this.theIf.getElseTransition().getToState().getId()); } elseText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); elseText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validateInput(); } }); browseElseButton = new Button(methodComposite, SWT.PUSH); browseElseButton.setText("..."); browseElseButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END)); browseElseButton.addSelectionListener(buttonListener); } applyDialogFont(parentComposite); return parentComposite; } /** * Cut the expression from given criteria string and return it. * * @param encodedCriteria * * @return */ private String cutExpression(String encodedCriteria) { return encodedCriteria.substring(EXPRESSION_PREFIX.length(), encodedCriteria.length() - EXPRESSION_SUFFIX.length()); } /** * * * @return */ public String getMessage() { return "Enter the details for the if criteria"; } /** * * * @return */ public IWebflowModelElement getModelElementParent() { return this.parent; } /** * * * @return */ protected String getShellTitle() { return "If"; } /** * * * @return */ public String getTest() { return this.onText.getText(); } /** * * * @return */ protected String getTitle() { return "If properties"; } /** * * * @param button */ private void handleButtonPressed(Button button) { if (button.equals(browseThenButton)) { ElementListSelectionDialog dialog = new ElementListSelectionDialog(getShell(), new DecoratingLabelProvider(new WebflowModelLabelProvider(), new WebflowModelLabelDecorator())); dialog.setBlockOnOpen(true); dialog.setElements(WebflowModelXmlUtils.getStates(parent, false).toArray()); dialog.setEmptySelectionMessage("Enter a valid state id"); dialog.setTitle("State reference"); dialog.setMessage("Please select a state reference"); dialog.setMultipleSelection(false); if (Dialog.OK == dialog.open()) { this.thenText.setText(((IState) dialog.getFirstResult()).getId()); } } else { ElementListSelectionDialog dialog = new ElementListSelectionDialog(getShell(), new DecoratingLabelProvider(new WebflowModelLabelProvider(), new WebflowModelLabelDecorator())); dialog.setBlockOnOpen(true); dialog.setElements(WebflowModelXmlUtils.getStates(parent, false).toArray()); dialog.setEmptySelectionMessage("Enter a valid state id"); dialog.setTitle("State reference"); dialog.setMessage("Please select a state reference"); dialog.setMultipleSelection(false); if (Dialog.OK == dialog.open()) { this.elseText.setText(((IState) dialog.getFirstResult()).getId()); } } this.validateInput(); } /** * */ protected void handleTableSelectionChanged() { // TODO Auto-generated method stub } /** * * * @param error */ protected void showError(String error) { super.setErrorMessage(error); } /** * * * @param string * * @return */ public String trimString(String string) { if (string != null && string == "") { string = null; } return string; } /** * */ protected void validateInput() { String id = this.onText.getText(); boolean error = false; String errorMessage = null; if (id == null || "".equals(id)) { errorMessage = "A valid test criteria is required. "; error = true; } if (this.ognlButton.getSelection()) { if (!id.startsWith(EXPRESSION_PREFIX) || !id.endsWith(EXPRESSION_SUFFIX)) { errorMessage = "A valid OGNL expression needs to start with '${' and ends with '}'. "; error = true; } else { try { Ognl.parseExpression(this.cutExpression(id)); } catch (OgnlException e) { errorMessage = "Malformed OGNL expression. "; error = true; } } } if (isNew) { String thenTxt = this.thenText.getText(); //String elseTxt = this.elseText.getText(); if (thenTxt == null || "".equals(thenTxt)) { errorMessage = "A valid then transition target is required. "; error = true; } } if (error) { getButton(OK).setEnabled(false); setErrorMessage(errorMessage); } else { getButton(OK).setEnabled(true); setErrorMessage(null); } } }