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.BonitaConstants; import org.bonitasoft.studio.common.ExpressionConstants; 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.common.repository.RepositoryManager; 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.JavaObjectData; 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.jdt.core.IField; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IMethod; import org.eclipse.jdt.core.IType; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.core.Signature; import org.eclipse.jdt.internal.corext.template.java.SignatureUtil; import org.eclipse.jdt.internal.corext.util.JavaModelUtil; import org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.ITreeSelection; 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.TreePath; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; 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 JavaExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private TableViewer viewer; private Expression editorInputExpression; private Composite mainComposite; private Text typeText; private TreeViewer javaTreeviewer; private Data data; private ITreeContentProvider contentProvider; private boolean isPageFlowContext = false; @Override public Control createExpressionEditor(Composite parent) { mainComposite = new Composite(parent, SWT.NONE); mainComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); mainComposite.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(true).create()); 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()) { javaTreeviewer.getTree().setEnabled(true); data = (Data) ((IStructuredSelection) event.getSelection()).getFirstElement(); String className = null; if (data instanceof JavaObjectData) { className = ((JavaObjectData) data).getClassName(); } else if (data.isMultiple()) { className = List.class.getName(); } if (className != null) { javaTreeviewer.setInput(className); javaTreeviewer.expandAll(); javaTreeviewer.getTree().setFocus(); javaTreeviewer.getTree().getShell().layout(true, true); JavaExpressionEditor.this.fireSelectionChanged(); } } } }); createBrowseJavaObjectForReadExpression(mainComposite); createReturnTypeComposite(parent); return mainComposite; } protected void createReturnTypeComposite(Composite parent) { Composite typeComposite = new Composite(parent, SWT.NONE); typeComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create()); typeComposite.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).margins(0, 0).create()); 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 createBrowseJavaObjectForReadExpression(Composite composite) { final Composite res = new Composite(composite, SWT.NONE); res.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); res.setLayout(GridLayoutFactory.fillDefaults().numColumns(1).margins(0, 0).create()); final Label label = new Label(res, SWT.NONE); label.setText(Messages.browseJava); javaTreeviewer = new TreeViewer(res, SWT.SINGLE | SWT.BORDER); javaTreeviewer.getControl().setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); javaTreeviewer.setLabelProvider(new JavaUILabelProvider() { @Override public String getText(Object item) { if (item instanceof IMethod) { try { return super.getText(item) + " - " + SignatureUtil.stripSignatureToFQN(((IMethod) item).getReturnType()); } catch (JavaModelException e) { BonitaStudioLog.error(e); return null; } } else { return super.getText(item); } } }); javaTreeviewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { ITreeSelection selection = (ITreeSelection) event.getSelection(); if (!selection.isEmpty()) { JavaExpressionEditor.this.fireSelectionChanged(); javaTreeviewer.getTree().setFocus(); } } }); javaTreeviewer.getTree().setEnabled(false); } private IMethod getJavaSelectionFromContent() { String className = null; if (data != null) { if (data.isMultiple()) { className = List.class.getName(); } else if (data instanceof JavaObjectData) { className = ((JavaObjectData) data).getClassName(); } if (className != null) { String content = editorInputExpression.getContent(); if (content != null) { IJavaProject project = RepositoryManager.getInstance().getCurrentRepository().getJavaProject(); IType type = null; try { type = ((PojoBrowserContentProvider) getContentProvider()).getType(); for (IMethod m : type.getMethods()) { String method = m.getElementName(); if (method.equals(content)) { return m; } } } catch (JavaModelException e) { BonitaStudioLog.error(e); } } } } return null; } protected ITreeContentProvider getContentProvider() { return contentProvider; } protected void setContentProvider(ITreeContentProvider provider) { contentProvider = provider; } protected String getJavaScript(ITreeSelection selection) { StringBuilder builder = new StringBuilder(); TreePath path = selection.getPaths()[0]; for (int i = 0; i < path.getSegmentCount(); i++) { Object item = path.getSegment(i); if (item instanceof IMethod) { builder.append("."); try { builder.append(((IMethod) item).getElementName() + ((IMethod) item).getSignature()); } catch (JavaModelException e) { BonitaStudioLog.error(e); } } else if (item instanceof IField) { builder.append("."); builder.append(((IField) item).getElementName()); } else if (item instanceof IType) { builder.append(((IType) item).getFullyQualifiedName()); } } return builder.toString(); } protected void setExpressionIsValid(boolean isValdid) { } protected String generateJavaAdditionalPath(Data data, ITreeSelection selection) { if (selection == null) { return ""; } TreePath path = selection.getPaths()[0]; if (path.getSegmentCount() == 1) { return ""; } StringBuilder res = new StringBuilder(data.getName()); res.append("."); for (int i = 1; i < path.getSegmentCount() - 1; i++) { Object item = path.getSegment(i); final IJavaElement iJavaElement = (IJavaElement) item; res.append(iJavaElement.getElementName()); if (iJavaElement.getElementType() == IJavaElement.METHOD) { res.append("()"); } res.append("."); } if (res.length() > 0) { res.deleteCharAt(res.length() - 1); } res.append(BonitaConstants.JAVA_VAR_SEPARATOR); Object item = path.getSegment(path.getSegmentCount() - 1); res.append(((IJavaElement) item).getElementName()); return res.toString(); } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { editorInputExpression = inputExpression; setContentProvider(new PojoBrowserContentProvider()); javaTreeviewer.setContentProvider(getContentProvider()); Set<Data> input = new HashSet<Data>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.VARIABLE_TYPE); for (Expression e : provider.getExpressions(context)) { Data data = (Data) e.getReferencedElements().get(0); if (data instanceof JavaObjectData || data.isMultiple()) { input.add(data); } } viewer.setInput(input); IObservableValue contentObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); IObservableValue nameObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); final 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(Data.class, String.class) { @Override public Object convert(Object data) { if (data instanceof Data) { return ((Data) data).getName() + " - " + ((JavaObjectData) data).getClassName() + "#" + editorInputExpression.getContent(); } else if (data instanceof IMethod) { final JavaObjectData data2 = (JavaObjectData) editorInputExpression.getReferencedElements() .get(0); return data2.getName() + " - " + data2.getClassName() + "#" + ((IMethod) data).getElementName(); } return null; } }; selectionToName.setConverter(nameConverter); UpdateValueStrategy selectionToContent = new UpdateValueStrategy(); IConverter contentConverter = new Converter(Object.class, String.class) { @Override public Object convert(Object value) { if (value instanceof IMethod) { return ((IMethod) value).getElementName(); } Object selection = ((IStructuredSelection) viewer.getSelection()).getFirstElement(); if (selection instanceof Data) { return ((Data) selection).getName(); } return null; } }; selectionToContent.setConverter(contentConverter); UpdateValueStrategy methodToSelection = new UpdateValueStrategy(); IConverter methodToSelectionConverter = new Converter(String.class, IMethod.class) { @Override public Object convert(Object methodName) { IType type = ((PojoBrowserContentProvider) getContentProvider()).getType(); if (type != null) { try { for (IMethod method : type.getMethods()) { if (method.getElementName().equals(methodName)) { return method; } } } catch (JavaModelException e) { } } return null; } }; methodToSelection.setConverter(methodToSelectionConverter); UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); IConverter returnTypeConverter = new Converter(IType.class, String.class) { @Override public Object convert(Object iType) { if (!editorInputExpression.isReturnTypeFixed()) { if (iType instanceof IMethod) { String qualifiedType = Object.class.getName(); try { qualifiedType = JavaModelUtil.getResolvedTypeName( Signature.getTypeErasure(((IMethod) iType).getReturnType()), ((IMethod) iType).getDeclaringType()); if ("int".equals(qualifiedType)) { qualifiedType = Integer.class.getName(); } else if ("boolean".equals(qualifiedType)) { qualifiedType = Boolean.class.getName(); } else if ("long".equals(qualifiedType)) { qualifiedType = Long.class.getName(); } else if ("float".equals(qualifiedType)) { qualifiedType = Float.class.getName(); } else if ("double".equals(qualifiedType)) { qualifiedType = Double.class.getName(); } else if ("short".equals(qualifiedType)) { qualifiedType = Short.class.getName(); } else if ("byte".equals(qualifiedType)) { qualifiedType = Byte.class.getName(); } else if ("E".equals(qualifiedType)) { qualifiedType = Object.class.getName(); } else if ("V".equals(qualifiedType)) { qualifiedType = Object.class.getName(); } } catch (Exception e) { BonitaStudioLog.error(e); } return qualifiedType; } else if (iType instanceof IType) { return ((IType) iType).getFullyQualifiedName(); } } else { return returnTypeObservable.getValue(); } return null; } }; 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), referenceObservable, selectionToReferencedData, referencedDataToSelection); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), nameObservable, selectionToName, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(javaTreeviewer), nameObservable, selectionToName, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(javaTreeviewer), contentObservable, selectionToContent, methodToSelection); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(javaTreeviewer), returnTypeObservable, selectionToReturnType, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(SWTObservables.observeText(typeText, SWT.Modify), returnTypeObservable); } @Override public boolean canFinish() { return !viewer.getSelection().isEmpty() && !javaTreeviewer.getSelection().isEmpty() && ((IStructuredSelection) javaTreeviewer.getSelection()).getFirstElement() instanceof IMethod; } @Override public void okPressed() { } @Override public Control getTextControl() { return null; } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }