Java tutorial
/** * Copyright (C) 2012 BonitaSoft S.A. * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2.0 of the License, or * (at your option) any later version. * * This program 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 General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.bonitasoft.studio.scripting.provider; import org.bonitasoft.studio.common.jface.databinding.validator.EmptyInputValidator; import org.bonitasoft.studio.common.log.BonitaStudioLog; import org.bonitasoft.studio.common.repository.RepositoryManager; import org.bonitasoft.studio.expression.editor.constant.ExpressionReturnTypeContentProvider; import org.bonitasoft.studio.expression.editor.provider.IExpressionEditor; import org.bonitasoft.studio.expression.editor.provider.SelectionAwareExpressionEditor; import org.bonitasoft.studio.expression.editor.viewer.ExpressionViewer; import org.bonitasoft.studio.model.expression.Expression; import org.bonitasoft.studio.model.expression.ExpressionPackage; import org.bonitasoft.studio.scripting.extensions.IScriptLanguageProvider; import org.bonitasoft.studio.scripting.extensions.ScriptLanguageService; import org.bonitasoft.studio.scripting.i18n.Messages; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.conversion.Converter; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.observable.value.IValueChangeListener; import org.eclipse.core.databinding.observable.value.ValueChangeEvent; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.emf.ecore.EObject; import org.eclipse.jdt.core.IType; import org.eclipse.jdt.core.search.IJavaSearchConstants; import org.eclipse.jdt.internal.core.search.JavaSearchScope; import org.eclipse.jdt.internal.ui.dialogs.FilteredTypesSelectionDialog; import org.eclipse.jface.databinding.fieldassist.ControlDecorationSupport; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.DialogTray; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Text; /** * @author Romain Bioteau * */ public class ScriptExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private final String languageId; private Composite mainComposite; private Text expressionNameText; private Combo expressionInterpreterCombo; private IExpressionEditor editor; private ComboViewer typeCombo; private Button browseClassesButton; private Expression inputExpression; private IObservableValue returnTypeModelObservable = null; private boolean isPageFlowContext = false; public ScriptExpressionEditor(Expression expression) { if (expression != null) { if (expression.getInterpreter() == null || expression.getInterpreter().isEmpty()) { expression.setInterpreter(ScriptLanguageService.getInstance().getDefaultLanguage()); } languageId = expression.getInterpreter(); } else { languageId = ""; } } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#createExpressionEditor(org.eclipse.swt.widgets.Composite) */ @Override public Control createExpressionEditor(Composite parent) { mainComposite = new Composite(parent, SWT.NONE); mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); GridLayout layout = new GridLayout(4, false); layout.marginBottom = 0; layout.marginHeight = 0; layout.marginWidth = 0; layout.marginTop = 10; layout.marginRight = 0; layout.marginLeft = 0; mainComposite.setLayout(layout); Label scriptNameLabel = new Label(mainComposite, SWT.NONE); scriptNameLabel.setLayoutData(GridDataFactory.fillDefaults().align(SWT.END, SWT.CENTER).create()); scriptNameLabel.setText(Messages.name + " *"); expressionNameText = new Text(mainComposite, SWT.BORDER | SWT.SINGLE); expressionNameText.setLayoutData( GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).create()); Label interpreterLabel = new Label(mainComposite, SWT.NONE); interpreterLabel.setLayoutData(GridDataFactory.fillDefaults().align(SWT.END, SWT.CENTER).create()); interpreterLabel.setText(Messages.interpreter); expressionInterpreterCombo = new Combo(mainComposite, SWT.READ_ONLY | SWT.BORDER); expressionInterpreterCombo.setLayoutData( GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).create()); for (IScriptLanguageProvider provider : ScriptLanguageService.getInstance().getScriptLanguageProviders()) { expressionInterpreterCombo.add(provider.getLanguageName()); } if (expressionInterpreterCombo.getItemCount() < 2) { expressionInterpreterCombo.setEnabled(false); } IScriptLanguageProvider provider = ScriptLanguageService.getInstance() .getScriptLanguageProvider(languageId); editor = provider.getExpressionEditor(); editor.setIsPageFlowContext(isPageFlowContext); Composite editorComposite = new Composite(mainComposite, SWT.NONE); editorComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(4, 1).create()); layout = new GridLayout(1, false); layout.marginBottom = 0; layout.marginHeight = 0; layout.marginWidth = 0; layout.marginTop = 10; layout.marginRight = 0; layout.marginLeft = 0; editorComposite.setLayout(layout); editor.createExpressionEditor(editorComposite); createReturnTypeComposite(editorComposite); return mainComposite; } protected void createReturnTypeComposite(Composite parent) { Composite typeComposite = new Composite(parent, SWT.NONE); typeComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); GridLayout gl = new GridLayout(3, false); gl.marginWidth = 0; gl.marginHeight = 0; typeComposite.setLayout(gl); final Label typeLabel = new Label(typeComposite, SWT.NONE); typeLabel.setText(Messages.returnType); typeLabel.setLayoutData(GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).create()); typeCombo = new ComboViewer(typeComposite, SWT.BORDER); typeCombo.getCombo().setLayoutData(GridDataFactory.fillDefaults().grab(true, false) .align(SWT.FILL, SWT.CENTER).indent(10, 0).create()); typeCombo.setContentProvider(new ExpressionReturnTypeContentProvider()); typeCombo.setLabelProvider(new LabelProvider()); typeCombo.setSorter(new ViewerSorter() { @Override public int compare(Viewer viewer, Object e1, Object e2) { String t1 = (String) e1; String t2 = (String) e2; return t1.compareTo(t2); } }); typeCombo.getCombo().addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { fireSelectionChanged(); } }); browseClassesButton = new Button(typeComposite, SWT.PUSH); browseClassesButton.setText(Messages.browse); browseClassesButton.setLayoutData(GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).create()); browseClassesButton.addListener(SWT.Selection, new Listener() { @Override public void handleEvent(Event event) { openClassSelectionDialog(); } }); } /** * @param classText */ @SuppressWarnings("restriction") private void openClassSelectionDialog() { JavaSearchScope scope = new JavaSearchScope(); try { scope.add(RepositoryManager.getInstance().getCurrentRepository().getJavaProject()); } catch (Exception ex) { BonitaStudioLog.error(ex); } FilteredTypesSelectionDialog searchDialog = new FilteredTypesSelectionDialog( Display.getDefault().getActiveShell(), false, null, scope, IJavaSearchConstants.TYPE); if (searchDialog.open() == Dialog.OK) { String selectedTypeName = ((IType) searchDialog.getFirstResult()).getFullyQualifiedName(); typeCombo.setInput(selectedTypeName); inputExpression.setReturnType(selectedTypeName); } } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer viewer) { this.inputExpression = inputExpression; IObservableValue nameModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); IObservableValue interpreterModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__INTERPRETER); // IObservableValue propagationModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__PROPAGATE_VARIABLE_CHANGE) ; UpdateValueStrategy opposite = new UpdateValueStrategy(); opposite.setConverter(new Converter(Boolean.class, Boolean.class) { @Override public Object convert(Object fromObject) { return !(Boolean) fromObject; } }); UpdateValueStrategy targetToModel = new UpdateValueStrategy(); targetToModel.setAfterConvertValidator(new EmptyInputValidator(Messages.name)); ControlDecorationSupport .create(dataBindingContext.bindValue(SWTObservables.observeText(expressionNameText, SWT.Modify), nameModelObservable, targetToModel, null), SWT.LEFT); dataBindingContext.bindValue(SWTObservables.observeSelection(expressionInterpreterCombo), interpreterModelObservable); nameModelObservable.addValueChangeListener(new IValueChangeListener() { @Override public void handleValueChange(ValueChangeEvent arg0) { fireSelectionChanged(); } }); editor.bindExpression(dataBindingContext, context, inputExpression, filters, viewer); if (inputExpression.getReturnType() != null) { typeCombo.setInput(inputExpression.getReturnType()); } else { typeCombo.setInput(new Object()); } returnTypeModelObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__RETURN_TYPE); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(typeCombo), returnTypeModelObservable); dataBindingContext.bindValue(SWTObservables.observeText(typeCombo.getCombo()), returnTypeModelObservable); typeCombo.getCombo().setEnabled(!inputExpression.isReturnTypeFixed()); browseClassesButton.setEnabled(!inputExpression.isReturnTypeFixed()); } @Override public void addListener(Listener listener) { super.addListener(listener); editor.addListener(listener); } @Override public boolean canFinish() { return expressionNameText != null && !expressionNameText.isDisposed() && !expressionNameText.getText().isEmpty() && editor.canFinish() && typeCombo != null && !typeCombo.getCombo().isDisposed() && !typeCombo.getCombo().getText().trim().isEmpty(); } @Override public void dispose() { super.dispose(); if (editor != null) { editor.dispose(); } if (returnTypeModelObservable != null) { returnTypeModelObservable.dispose(); } } @Override public void okPressed() { editor.okPressed(); } @Override public boolean provideDialogTray() { return editor.provideDialogTray(); } @Override public DialogTray createDialogTray() { return editor.createDialogTray(); } @Override public Control getTextControl() { return editor.getTextControl(); } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }