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.xml.ui; import java.util.ArrayList; 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.repository.RepositoryManager; 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.XMLData; import org.bonitasoft.studio.xml.Messages; import org.bonitasoft.studio.xml.api.XPathReturnType; import org.bonitasoft.studio.xml.repository.XSDRepositoryStore; import org.bonitasoft.studio.xml.ui.XSDContentProvider.Append; 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.ComboViewer; import org.eclipse.jface.viewers.DecoratingLabelProvider; import org.eclipse.jface.viewers.IElementComparer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; 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.layout.GridData; 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; import org.eclipse.xsd.XSDAttributeDeclaration; import org.eclipse.xsd.XSDElementDeclaration; import org.eclipse.xsd.XSDNamedComponent; import org.eclipse.xsd.XSDParticle; /** * @author Romain Bioteau * */ public class XPathExpressionEditor extends SelectionAwareExpressionEditor implements IExpressionEditor { private Expression editorInputExpression; private Composite mainComposite; private TableViewer viewer; private XSDContentProvider provider; private String dataName; private TreeViewer xsdViewer; private ComboViewer typeCombo; private Text text; private boolean isPageFlowContext = false; /* (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(2, true)); 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()) { xsdViewer.expandAll(); // String content = editorInputExpression.getContent() ; // if(content == null){ // content = "" ; // } // xsdViewer.setSelection(new StructuredSelection(createTreePath(content, provider))); XPathExpressionEditor.this.fireSelectionChanged(); } } }); createXPathChooser(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()); 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()); typeCombo = new ComboViewer(typeComposite, SWT.BORDER | SWT.READ_ONLY); typeCombo.getControl().setLayoutData( GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.CENTER).create()); typeCombo.setContentProvider(new ArrayContentProvider()); typeCombo.setInput(XPathReturnType.getAvailableReturnTypes()); typeCombo.setSelection(new StructuredSelection(XPathReturnType.XPATH_STRING)); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#canFinish() */ @Override public boolean canFinish() { return !xsdViewer.getSelection().isEmpty(); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#dispose() */ @Override public void dispose() { super.dispose(); } /* (non-Javadoc) * @see org.bonitasoft.studio.expression.editor.provider.IExpressionEditor#okPressed() */ @Override public void okPressed() { } @Override public void bindExpression(EMFDataBindingContext dataBindingContext, EObject context, Expression inputExpression, ViewerFilter[] filters, ExpressionViewer expressionViewer) { editorInputExpression = inputExpression; Set<Data> input = new HashSet<Data>(); IExpressionProvider provider = ExpressionEditorService.getInstance() .getExpressionProvider(ExpressionConstants.VARIABLE_TYPE); for (Expression e : provider.getExpressions(context)) { EObject data = e.getReferencedElements().get(0); if (data instanceof XMLData) { input.add((XMLData) data); } } viewer.setInput(input); IObservableValue nameObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__NAME); IObservableValue contentObservable = EMFObservables.observeValue(inputExpression, ExpressionPackage.Literals.EXPRESSION__CONTENT); 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(String.class, String.class) { @Override public Object convert(Object data) { if (data instanceof Data) { XMLData xmlData = (XMLData) data; return xmlData.getName() + " - " + editorInputExpression.getContent(); } else if (data instanceof String) { final XMLData xmlData = (XMLData) ((IStructuredSelection) viewer.getSelection()) .getFirstElement(); return xmlData.getName() + " - " + data; } return null; } }; selectionToName.setConverter(nameConverter); UpdateValueStrategy selectionToContent = new UpdateValueStrategy(); IConverter contentConverter = new Converter(Object.class, String.class) { @Override public Object convert(Object value) { if (!xsdViewer.getSelection().isEmpty()) { return computeXPath((ITreeSelection) xsdViewer.getSelection()); } Object selection = ((IStructuredSelection) viewer.getSelection()).getFirstElement(); if (selection instanceof Data) { return ((Data) selection).getName(); } return null; } }; selectionToContent.setConverter(contentConverter); UpdateValueStrategy contentToSelection = new UpdateValueStrategy(); IConverter methodToSelectionConverter = new Converter(String.class, Object.class) { @Override public Object convert(Object xPathExpression) { if (xPathExpression instanceof String) { ITreeSelection selection = new org.eclipse.jface.viewers.TreeSelection(createTreePath( (String) xPathExpression, (XSDContentProvider) xsdViewer.getContentProvider())); return selection.getFirstElement(); } return null; } }; contentToSelection.setConverter(methodToSelectionConverter); UpdateValueStrategy selectionToReturnType = new UpdateValueStrategy(); selectionToReturnType.setConverter(new Converter(Object.class, String.class) { @Override public Object convert(Object element) { if (editorInputExpression.isReturnTypeFixed()) { return returnTypeObservable.getValue(); } else { return XPathReturnType.getType(element); } } }); UpdateValueStrategy selectionToReferencedData = new UpdateValueStrategy(); IConverter referenceConverter = new Converter(Data.class, List.class) { @Override public Object convert(Object data) { if (data != null) { XMLData xmlData = (XMLData) data; dataName = xmlData.getName(); String namespace = xmlData.getNamespace(); String element = xmlData.getType(); XSDRepositoryStore xsdStore = (XSDRepositoryStore) RepositoryManager.getInstance() .getRepositoryStore(XSDRepositoryStore.class); XSDElementDeclaration root = xsdStore.findElementDeclaration(namespace, element); XSDElementDeclaration existingElement = ((XSDContentProvider) xsdViewer.getContentProvider()) .getElement(); if (existingElement == null || !existingElement.equals(root)) { ((XSDContentProvider) xsdViewer.getContentProvider()).setElement(root); } 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())) { XMLData xmlData = (XMLData) data; dataName = xmlData.getName(); String namespace = xmlData.getNamespace(); String element = xmlData.getType(); XSDRepositoryStore xsdStore = (XSDRepositoryStore) RepositoryManager.getInstance() .getRepositoryStore(XSDRepositoryStore.class); XSDElementDeclaration root = xsdStore.findElementDeclaration(namespace, element); ((XSDContentProvider) xsdViewer.getContentProvider()).setElement(root); return data; } } return null; } }; referencedDataToSelection.setConverter(referencetoDataConverter); UpdateValueStrategy enableStrategy = new UpdateValueStrategy(); enableStrategy.setConverter(new Converter(Object.class, Boolean.class) { @Override public Object convert(Object fromObject) { return fromObject != null; } }); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(viewer), referenceObservable, selectionToReferencedData, referencedDataToSelection); dataBindingContext.bindValue(SWTObservables.observeText(text, SWT.Modify), nameObservable, selectionToName, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(SWTObservables.observeEnabled(xsdViewer.getTree()), ViewersObservables.observeSingleSelection(viewer), new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), enableStrategy); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(xsdViewer), contentObservable, selectionToContent, contentToSelection); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(xsdViewer), returnTypeObservable, selectionToReturnType, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER)); dataBindingContext.bindValue(ViewersObservables.observeSingleSelection(typeCombo), returnTypeObservable); } private void createXPathChooser(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); GridLayout gl = new GridLayout(1, false); gl.marginHeight = 0; gl.marginWidth = 0; composite.setLayout(gl); Label label = new Label(composite, SWT.WRAP); label.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).hint(SWT.DEFAULT, 30).create()); label.setText(Messages.selectElementLabel); xsdViewer = new TreeViewer(composite); provider = new XSDContentProvider(true); xsdViewer.setComparer(new IElementComparer() { @Override public int hashCode(Object element) { return element.hashCode(); } @Override public boolean equals(Object a, Object b) { if (a instanceof XSDAttributeDeclaration && b instanceof XSDAttributeDeclaration) { return ((XSDAttributeDeclaration) a).getName().equals(((XSDAttributeDeclaration) b).getName()) && ((XSDAttributeDeclaration) a).getType().getName() .equals(((XSDAttributeDeclaration) b).getType().getName()); } else if (a instanceof XSDElementDeclaration && b instanceof XSDElementDeclaration) { return ((XSDElementDeclaration) a).getName().equals(((XSDElementDeclaration) b).getName()) && ((XSDElementDeclaration) a).getType().getName() .equals(((XSDElementDeclaration) b).getType().getName()); } return a.equals(b); } }); xsdViewer.setContentProvider(provider); XSDLabelProvider labelProvider = new XSDLabelProvider(); xsdViewer.setLabelProvider(new DecoratingLabelProvider(labelProvider, labelProvider)); GridData layoutData = new GridData(SWT.FILL, SWT.FILL, true, true); layoutData.minimumHeight = 100; xsdViewer.getControl() .setLayoutData(GridDataFactory.fillDefaults().grab(true, true).hint(SWT.DEFAULT, 150).create()); xsdViewer.setInput(new Object()); text = new Text(composite, SWT.WRAP | SWT.BORDER); text.setLayoutData(GridDataFactory.fillDefaults().hint(SWT.DEFAULT, 40).create()); xsdViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { ITreeSelection selection = (ITreeSelection) xsdViewer.getSelection(); String xpath = computeXPath(selection, false); if (dataName != null) { if (xpath == null || xpath.isEmpty()) { text.setText(dataName); } else { text.setText(xpath); } } text.redraw(); typeCombo.setSelection( new StructuredSelection(XPathReturnType.getType(selection.getFirstElement()))); XPathExpressionEditor.this.fireSelectionChanged(); } }); } private TreePath createTreePath(String details, XSDContentProvider provider) { String[] pieces = details.split("\\" + BonitaConstants.XPATH_VAR_SEPARATOR); boolean append = false; if (pieces.length > 1 && pieces[1].equals(BonitaConstants.XPATH_APPEND_FLAG)) { append = true; } details = pieces[0]; List<String> segments = new ArrayList<String>(); for (String segment : details.split("/")) { if (segment.length() != 0 && !segment.equals("text()")) { if (segment.startsWith("@")) { segments.add(segment.substring(1)); } else if (segment.contains("[")) { segments.add(segment.substring(0, segment.indexOf("["))); } else { segments.add(segment); } } } List<Object> res = new ArrayList<Object>(); Object current = XSDContentProvider.WHOLE_XML; res.add(current); for (String segment : segments) { for (Object item : provider.getChildren(current)) { if (item instanceof XSDNamedComponent && ((XSDNamedComponent) item).getName().equals(segment)) { current = item; res.add(current); break; } } } if (append) { res.add(Append.newInstance(current)); } return new TreePath(res.toArray()); } /** * @param selection * @return */ public static String computeXPath(ITreeSelection selection) { return computeXPath(selection, false); } public static String computeXPath(ITreeSelection selection, boolean useQualifiedName) { if (selection.getPaths().length == 0) { return ""; } TreePath path = selection.getPaths()[0]; return computeXPath(path, useQualifiedName); } /** * @param path * @return */ public static String computeXPath(TreePath path) { return computeXPath(path, false); } public static String computeXPath(TreePath path, boolean useQualifiedName) { StringBuilder pathBuilder = new StringBuilder(); for (int i = 1; i < path.getSegmentCount(); i++) { if (path.getSegment(i) instanceof XSDContentProvider.Append) { continue; } pathBuilder.append('/'); XSDNamedComponent item = (XSDNamedComponent) path.getSegment(i); if (item instanceof XSDAttributeDeclaration) { pathBuilder.append('@'); } if (useQualifiedName) { pathBuilder.append(item.getQName()); } else { pathBuilder.append(item.getName()); } if (item instanceof XSDElementDeclaration) { XSDElementDeclaration element = (XSDElementDeclaration) item; if (element.getContainer() instanceof XSDParticle) { XSDParticle particle = (XSDParticle) element.getContainer(); if (particle.getMaxOccurs() < 0 || particle.getMinOccurs() > 1) { pathBuilder.append("[1]"); } } } } if (path.getLastSegment() instanceof XSDElementDeclaration && ((XSDElementDeclaration) path.getLastSegment()).getType().getSimpleType() != null) { pathBuilder.append("/text()"); } if (path.getLastSegment() instanceof XSDContentProvider.Append) { pathBuilder.append(BonitaConstants.XPATH_VAR_SEPARATOR + BonitaConstants.XPATH_APPEND_FLAG); } return pathBuilder.toString(); } @Override public Control getTextControl() { return null; } @Override public boolean isPageFlowContext() { return isPageFlowContext; } @Override public void setIsPageFlowContext(boolean isPageFlowContext) { this.isPageFlowContext = isPageFlowContext; } }