Java tutorial
/** * Copyright (C) 2015 Bonitasoft S.A. * Bonitasoft, 32 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.parameters.expression.editor; 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.emf.tools.ModelHelper; import org.bonitasoft.studio.common.jface.TableColumnSorter; 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.parameter.Parameter; import org.bonitasoft.studio.model.process.Data; import org.bonitasoft.studio.parameters.i18n.Messages; import org.bonitasoft.studio.parameters.property.section.provider.ParameterNameLabelProvider; import org.bonitasoft.studio.parameters.wizard.page.AddParameterWizard; import org.bonitasoft.studio.parameters.wizard.page.ParameterWizardDialog; 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.transaction.util.TransactionUtil; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.dialogs.Dialog; 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.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.Text; /** * @author Romain Bioteau * */ public class ParameterEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private TableViewer viewer; private GridLayout gridLayout; private Expression editorInputExpression; private Composite mainComposite; private Text typeText; private Button addExpressionButton; private boolean isPageFlowContext = false; @Override public Control createExpressionEditor(final Composite parent, final EMFDataBindingContext ctx) { createTableViewer(parent); createReturnTypeComposite(parent); createAddExpressionButton(parent); return mainComposite; } private void createTableViewer(final 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); final TableLayout layout = new TableLayout(); layout.addColumnData(new ColumnWeightData(100, false)); viewer.getTable().setLayout(layout); viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); final TableViewerColumn columnViewer = new TableViewerColumn(viewer, SWT.NONE); final TableColumn column = columnViewer.getColumn(); column.setText(Messages.name); final TableColumnSorter sorter = new TableColumnSorter(viewer); sorter.setColumn(column); viewer.getTable().setHeaderVisible(true); viewer.setContentProvider(new ArrayContentProvider()); viewer.setLabelProvider(new ParameterNameLabelProvider()); viewer.addPostSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(final SelectionChangedEvent event) { if (!event.getSelection().isEmpty()) { ParameterEditor.this.fireSelectionChanged(); } } }); } private void createAddExpressionButton(final Composite 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); } protected void createReturnTypeComposite(final Composite parent) { final Composite typeComposite = new Composite(parent, SWT.NONE); typeComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); final GridLayout gl = new GridLayout(2, 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()); typeText = new Text(typeComposite, SWT.BORDER | SWT.READ_ONLY); typeText.setLayoutData( GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.CENTER).create()); } protected void handleSpecificDatatypeEdition(final 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 fillViewerInput(final EObject context) { final Set<Parameter> input = new HashSet<Parameter>(); final IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.PARAMETER_TYPE); for (final Expression e : provider.getExpressions(context)) { if (editorInputExpression.isReturnTypeFixed()) { if (compatibleReturnType(editorInputExpression, e)) { input.add((Parameter) e.getReferencedElements().get(0)); } } else { input.add((Parameter) e.getReferencedElements().get(0)); } } viewer.setInput(input); } private void expressionButtonListener(final EObject context) { final ParameterWizardDialog parameterDialog = new ParameterWizardDialog( Display.getCurrent().getActiveShell(), new AddParameterWizard(ModelHelper.getParentProcess(context), TransactionUtil.getEditingDomain(context))); if (parameterDialog.open() == Dialog.OK) { fillViewerInput(context); } } @Override public void bindExpression(final EMFDataBindingContext dataBindingContext, final EObject context, final Expression inputExpression, final ViewerFilter[] filters, final ExpressionViewer expressionViewer) { final EObject finalContext = context; addExpressionButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { super.widgetSelected(e); expressionButtonListener(finalContext); } }); editorInputExpression = inputExpression; fillViewerInput(context); final IObservableValue contentObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); final IObservableValue nameObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); final IObservableValue returnTypeObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__RETURN_TYPE); final IObservableValue referenceObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__REFERENCED_ELEMENTS); final UpdateValueStrategy selectionToName = new UpdateValueStrategy(); final IConverter nameConverter = new Converter(Parameter.class, String.class) { @Override public Object convert(final Object parameter) { return ((Parameter) parameter).getName(); } }; selectionToName.setConverter(nameConverter); final UpdateValueStrategy selectionToContent = new UpdateValueStrategy(); final IConverter contentConverter = new Converter(Parameter.class, String.class) { @Override public Object convert(final Object parameter) { return ((Parameter) parameter).getName(); } }; selectionToContent.setConverter(contentConverter); final UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); final IConverter returnTypeConverter = new Converter(Parameter.class, String.class) { @Override public Object convert(final Object parameter) { return ((Parameter) parameter).getTypeClassname(); } }; selectionToReturnType.setConverter(returnTypeConverter); final UpdateValueStrategy selectionToReferencedData = new UpdateValueStrategy(); final IConverter referenceConverter = new Converter(Parameter.class, List.class) { @Override public Object convert(final Object parameter) { return Collections.singletonList(parameter); } }; selectionToReferencedData.setConverter(referenceConverter); final UpdateValueStrategy referencedDataToSelection = new UpdateValueStrategy(); final IConverter referencetoDataConverter = new Converter(List.class, Parameter.class) { @SuppressWarnings("unchecked") @Override public Object convert(final Object parameterList) { if (!((List<Parameter>) parameterList).isEmpty()) { final Parameter p = ((List<Parameter>) parameterList).get(0); final Collection<Parameter> inputParameters = (Collection<Parameter>) viewer.getInput(); for (final Parameter param : inputParameters) { if (param.getName().equals(p.getName()) && param.getTypeClassname().equals(p.getTypeClassname())) { return param; } } } 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 boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(final boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } /* * (non-Javadoc) * @see org.bonitasoft.studio.common.IBonitaVariableContext#isOverViewContext() */ @Override public boolean isOverViewContext() { return false; } /* * (non-Javadoc) * @see org.bonitasoft.studio.common.IBonitaVariableContext#setIsOverviewContext(boolean) */ @Override public void setIsOverviewContext(final boolean isOverviewContext) { } }