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.Date; import java.util.HashSet; import java.util.List; import java.util.Set; import org.bonitasoft.studio.common.ExpressionConstants; import org.bonitasoft.studio.common.emf.tools.ModelHelper; import org.bonitasoft.studio.common.extension.BonitaStudioExtensionRegistryManager; import org.bonitasoft.studio.common.jface.DataStyledTreeLabelProvider; import org.bonitasoft.studio.common.jface.TableColumnSorter; import org.bonitasoft.studio.common.log.BonitaStudioLog; 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.IProposalListener; 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.form.DateFormField; import org.bonitasoft.studio.model.form.Widget; import org.bonitasoft.studio.model.process.Data; import org.bonitasoft.studio.model.process.Pool; 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.core.databinding.observable.value.IValueChangeListener; import org.eclipse.core.databinding.observable.value.ValueChangeEvent; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IConfigurationElement; 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.fieldassist.ControlDecoration; 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.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.Label; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; /** * @author Romain Bioteau * */ public class DataExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private TableViewer viewer; private GridLayout gridLayout; private Expression editorInputExpression; private Composite mainComposite; private Text typeText; private IObservableValue returnTypeObservable = null; private Button addExpressionButton; 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 DataStyledTreeLabelProvider()); viewer.addPostSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().isEmpty()) { DataExpressionEditor.this.fireSelectionChanged(); } } }); createReturnTypeComposite(parent); addExpressionButton = new Button(parent, SWT.FLAT); addExpressionButton.setLayoutData( GridDataFactory.fillDefaults().align(SWT.LEFT, SWT.CENTER).hint(85, SWT.DEFAULT).create()); addExpressionButton.setText(Messages.addData); 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()); } protected void handleSpecificDatatypeEdition(Data data) { if (gridLayout.numColumns > 1) { mainComposite.getChildren()[1].dispose(); gridLayout.numColumns--; viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); mainComposite.layout(); } } private void expressionButtonListener(EObject context, ExpressionViewer expressionViewer, ViewerFilter[] filters) throws CoreException { for (IConfigurationElement element : BonitaStudioExtensionRegistryManager.getInstance() .getConfigurationElements("org.bonitasoft.studio.expression.proposalListener")) { final String expressionTypeLink = element.getAttribute("type"); if (expressionTypeLink.equals(ExpressionConstants.VARIABLE_TYPE)) { final IProposalListener proposalListener = (IProposalListener) element .createExecutableExtension("providerClass"); expressionViewer.getContentProposal().addNewData(proposalListener); fillViewerData(context, filters); } } } private void fillViewerData(EObject context, ViewerFilter[] filters) { Set<Data> input = new HashSet<Data>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.VARIABLE_TYPE); final Set<Expression> expressions = provider.getExpressions(context); final Set<Expression> filteredExpressions = new HashSet<Expression>(); if (expressions != null) { filteredExpressions.addAll(expressions); if (input != null && filters != null) { for (final Expression exp : expressions) { for (final ViewerFilter filter : filters) { if (filter != null && !filter.select(viewer, context, exp)) { filteredExpressions.remove(exp); } } } } } for (Expression e1 : filteredExpressions) { if (editorInputExpression.isReturnTypeFixed()) { if (compatibleReturnType(editorInputExpression, e1)) { input.add((Data) e1.getReferencedElements().get(0)); } } else { input.add((Data) e1.getReferencedElements().get(0)); } } viewer.setInput(input); } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, final ExpressionViewer expressionViewer) { final EObject finalContext = context; if (context instanceof Widget) { if (ModelHelper.getPageFlow((Widget) context) instanceof Pool) { addExpressionButton.setEnabled(false); } } final ViewerFilter[] finalFilters = filters; addExpressionButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { try { expressionButtonListener(finalContext, expressionViewer, finalFilters); } catch (CoreException e1) { BonitaStudioLog.error(e1); } } }); editorInputExpression = inputExpression; fillViewerData(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 data) { return ((Data) data).getName(); } }; selectionToContent.setConverter(contentConverter); UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); IConverter returnTypeConverter = new Converter(Data.class, String.class) { @Override public Object convert(Object data) { return org.bonitasoft.studio.common.DataUtil.getTechnicalTypeFor((Data) data); } }; selectionToReturnType.setConverter(returnTypeConverter); UpdateValueStrategy selectionToReferencedData = new UpdateValueStrategy(); IConverter referenceConverter = new Converter(Data.class, List.class) { @Override public Object convert(Object data) { if (data != null) { return Collections.singletonList(data); } else { return Collections.emptyList(); } } }; selectionToReferencedData.setConverter(referenceConverter); UpdateValueStrategy referencedDataToSelection = new UpdateValueStrategy(); IConverter referencetoDataConverter = new Converter(List.class, Data.class) { @Override public Object convert(Object dataList) { Data d = ((List<Data>) dataList).get(0); Collection<Data> inputData = (Collection<Data>) viewer.getInput(); for (Data data : inputData) { if (data.getName().equals(d.getName()) && data.getDataType().getName().equals(d.getDataType().getName())) { return data; } } 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); if (context instanceof DateFormField) { final ControlDecoration cd = new ControlDecoration(typeText, SWT.TOP | SWT.LEFT); // cd.setImage(Pics.getImage(PicsConstants.error)) ; cd.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_WARN_TSK)); cd.setDescriptionText("It is recommanded to use Return type ad String or Date for Date Widget"); cd.setShowOnlyOnFocus(false); if (typeText.getText().equals(Date.class.getName()) || typeText.getText().equals(String.class.getName())) { cd.hide(); } else { cd.show(); } returnTypeObservable.addValueChangeListener(new IValueChangeListener() { @Override public void handleValueChange(ValueChangeEvent event) { if (typeText.getText().equals(Date.class.getName()) || typeText.getText().equals(String.class.getName())) { cd.hide(); } else { cd.show(); } } }); } } @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; } }