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.connectors.expression; import java.util.Collections; import java.util.HashSet; import java.util.List; import java.util.Set; import org.bonitasoft.studio.common.ExpressionConstants; import org.bonitasoft.studio.common.jface.TableColumnSorter; import org.bonitasoft.studio.connector.model.definition.Output; import org.bonitasoft.studio.connectors.ConnectorPlugin; import org.bonitasoft.studio.connectors.i18n.Messages; import org.bonitasoft.studio.expression.editor.ExpressionEditorService; import org.bonitasoft.studio.expression.editor.provider.IExpressionEditor; import org.bonitasoft.studio.expression.editor.provider.IExpressionProvider; 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.pics.Pics; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.conversion.Converter; import org.eclipse.core.databinding.conversion.IConverter; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.emf.ecore.EObject; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; 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.TableColumn; import org.eclipse.swt.widgets.Text; /** * @author Romain Bioteau * */ public class ConnectorOutputExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private Composite mainComposite; private TableViewer viewer; private Expression inputExpression; private Text typeText; private boolean isPageFlowContext = false; public ConnectorOutputExpressionEditor() { } /* (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()); mainComposite.setLayout(new GridLayout(1, false)); viewer = new TableViewer(mainComposite, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL); viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); TableLayout layout = new TableLayout(); layout.addColumnData(new ColumnWeightData(100, false)); viewer.getTable().setLayout(layout); viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); TableViewerColumn columnViewer = new TableViewerColumn(viewer, SWT.NONE); TableColumn column = columnViewer.getColumn(); column.setText(Messages.name); TableColumnSorter sorter = new TableColumnSorter(viewer); sorter.setColumn(column); viewer.getTable().setHeaderVisible(true); viewer.setContentProvider(new ArrayContentProvider()); viewer.setLabelProvider(new LabelProvider() { @Override public String getText(Object element) { return ((Output) element).getName(); } @Override public Image getImage(Object element) { return Pics.getImage("output.png", ConnectorPlugin.getDefault()); } }); viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent arg0) { ConnectorOutputExpressionEditor.this.fireSelectionChanged(); } }); createReturnTypeComposite(parent); 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(2, false); gl.marginWidth = 0; gl.marginHeight = 0; typeComposite.setLayout(gl); Label typeLabel = new Label(typeComposite, SWT.NONE); typeLabel.setText(Messages.returnType); typeLabel.setLayoutData(GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).create()); typeText = new Text(typeComposite, SWT.BORDER | SWT.READ_ONLY); typeText.setLayoutData( GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.CENTER).create()); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#bindExpression(org.eclipse.emf.databinding.EMFDataBindingContext, org.eclipse.emf.ecore.EObject, org.bonitasoft.studio.model.expression.Expression, org.eclipse.emf.edit.domain.EditingDomain) */ @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { this.inputExpression = inputExpression; Set<Output> input = new HashSet<Output>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.CONNECTOR_OUTPUT_TYPE); for (Expression e : provider.getExpressions(context)) { if (inputExpression.isReturnTypeFixed()) { if (e.getReturnType().equals(inputExpression.getReturnType())) { input.add((Output) e.getReferencedElements().get(0)); } } else { input.add((Output) e.getReferencedElements().get(0)); } } viewer.setInput(input); IObservableValue contentObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); IObservableValue nameObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); IObservableValue returnTypeObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__RETURN_TYPE); IObservableValue referenceObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__REFERENCED_ELEMENTS); UpdateValueStrategy selectionToName = new UpdateValueStrategy(); IConverter nameConverter = new Converter(Output.class, String.class) { @Override public Object convert(Object output) { return ((Output) output).getName(); } }; selectionToName.setConverter(nameConverter); UpdateValueStrategy selectionToContent = new UpdateValueStrategy(); IConverter contentConverter = new Converter(Output.class, String.class) { @Override public Object convert(Object output) { return ((Output) output).getName(); } }; selectionToContent.setConverter(contentConverter); UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); IConverter returnTypeConverter = new Converter(Output.class, String.class) { @Override public Object convert(Object output) { return ((Output) output).getType(); } }; selectionToReturnType.setConverter(returnTypeConverter); UpdateValueStrategy selectionToReferencedData = new UpdateValueStrategy(); IConverter referenceConverter = new Converter(Output.class, List.class) { @Override public Object convert(Object output) { return Collections.singletonList(output); } }; selectionToReferencedData.setConverter(referenceConverter); UpdateValueStrategy referencedDataToSelection = new UpdateValueStrategy(); IConverter modelReferenceToTarget = new Converter(List.class, Output.class) { @Override public Object convert(Object outputList) { Output output = ((List<Output>) outputList).get(0); for (int i = 0; i < viewer.getTable().getItemCount(); i++) { Output out = (Output) viewer.getElementAt(i); if (out.getName().equals(output.getName()) && out.getType().equals(output.getType())) { return out; } } return null; } }; referencedDataToSelection.setConverter(modelReferenceToTarget); dataBindingContext.bindValue(SWTObservables.observeText(typeText, SWT.Modify), returnTypeObservable); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), nameObservable, selectionToName, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), contentObservable, selectionToContent, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), returnTypeObservable, selectionToReturnType, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), referenceObservable, selectionToReferencedData, referencedDataToSelection); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#canFinish() */ @Override public boolean canFinish() { return !viewer.getSelection().isEmpty(); } @Override public void okPressed() { if (!inputExpression.getContent().equals(inputExpression.getName())) { inputExpression.setName(inputExpression.getContent()); } } @Override public Control getTextControl() { return null; } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }