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.data.provider; import java.util.Collection; 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.data.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.model.process.Data; import org.bonitasoft.studio.model.process.Document; 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.emf.edit.provider.ComposedAdapterFactory; import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; 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.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.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 DocumentExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private TableViewer viewer; private GridLayout gridLayout; private Expression editorInputExpression; private Composite mainComposite; private Text typeText; private IObservableValue returnTypeObservable = null; private boolean isPageFlowContext = false; @Override public Control createExpressionEditor(Composite parent) { mainComposite = new Composite(parent, SWT.NONE); mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); gridLayout = new GridLayout(1, false); mainComposite.setLayout(gridLayout); viewer = new TableViewer(mainComposite, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL); 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 AdapterFactoryLabelProvider( new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE)) { @Override public String getColumnText(Object object, int columnIndex) { if (object instanceof Document) { return ((Document) object).getName(); } return super.getColumnText(object, columnIndex); } }); viewer.addPostSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().isEmpty()) { DocumentExpressionEditor.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) .indent(10, 0).create()); } private void fillViewerDocument(EObject context, ViewerFilter[] filters) { Set<Document> input = new HashSet<Document>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.DOCUMENT_REF_TYPE); final Set<Expression> expressions = provider.getExpressions(context); for (Expression e1 : expressions) { input.add((Document) e1.getReferencedElements().get(0)); } if (editorInputExpression.isReturnTypeFixed() && !editorInputExpression.getReturnType().equals(String.class.getName())) { input.clear(); } viewer.setInput(input); } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { editorInputExpression = inputExpression; fillViewerDocument(context, filters); IObservableValue contentObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); IObservableValue nameObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); 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(Data.class, String.class) { @Override public Object convert(Object data) { return ((Data) data).getName(); } }; selectionToName.setConverter(nameConverter); UpdateValueStrategy selectionToContent = new UpdateValueStrategy(); IConverter contentConverter = new Converter(Data.class, String.class) { @Override public Object convert(Object document) { return ((Document) document).getName(); } }; selectionToContent.setConverter(contentConverter); UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); IConverter returnTypeConverter = new Converter(Document.class, String.class) { @Override public Object convert(Object data) { return String.class.getName(); } }; selectionToReturnType.setConverter(returnTypeConverter); UpdateValueStrategy selectionToReferencedData = new UpdateValueStrategy(); IConverter referenceConverter = new Converter(Document.class, List.class) { @Override public Object convert(Object document) { if (document != null) { return Collections.singletonList(document); } else { return Collections.emptyList(); } } }; selectionToReferencedData.setConverter(referenceConverter); UpdateValueStrategy referencedDataToSelection = new UpdateValueStrategy(); IConverter referencetoDataConverter = new Converter(List.class, Document.class) { @Override public Object convert(Object dataList) { Document d = ((List<Document>) dataList).get(0); Collection<Document> inputDocs = (Collection<Document>) viewer.getInput(); for (Document doc : inputDocs) { if (doc.getName().equals(d.getName())) { return doc; } } return null; } }; referencedDataToSelection.setConverter(referencetoDataConverter); 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); dataBindingContext.bindValue(SWTObservables.observeText(typeText, SWT.Modify), returnTypeObservable); } @Override public boolean canFinish() { return !viewer.getSelection().isEmpty(); } @Override public void okPressed() { if (!editorInputExpression.getContent().equals(editorInputExpression.getName())) { editorInputExpression.setName(editorInputExpression.getContent()); } } @Override public Control getTextControl() { return null; } @Override public void dispose() { super.dispose(); if (returnTypeObservable != null) { returnTypeObservable.dispose(); } } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }