Java tutorial
/* * Copyright (c) 2012 University of Southampton. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html */ package ac.soton.eventb.classdiagrams.diagram.part; import java.util.Collections; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import org.eclipse.emf.common.util.URI; import org.eclipse.emf.common.util.WrappedException; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.resource.Resource; import org.eclipse.emf.ecore.resource.ResourceSet; import org.eclipse.emf.ecore.util.EcoreUtil; import org.eclipse.emf.ecore.util.FeatureMap; import org.eclipse.emf.edit.provider.IWrapperItemProvider; import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider; import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; import org.eclipse.emf.transaction.TransactionalEditingDomain; import org.eclipse.gmf.runtime.diagram.core.services.ViewService; import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil; import org.eclipse.gmf.runtime.emf.core.GMFEditingDomainFactory; import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter; import org.eclipse.gmf.runtime.notation.Node; import org.eclipse.gmf.runtime.notation.View; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.model.WorkbenchContentProvider; import org.eclipse.ui.model.WorkbenchLabelProvider; /** * @generated */ public class ClassdiagramsElementChooserDialog extends Dialog { /** * @generated */ private TreeViewer myTreeViewer; /** * @generated */ private URI mySelectedModelElementURI; /** * @generated */ private View myView; /** * @generated */ private TransactionalEditingDomain myEditingDomain = GMFEditingDomainFactory.INSTANCE.createEditingDomain(); /** * @generated */ public ClassdiagramsElementChooserDialog(Shell parentShell, View view) { super(parentShell); setShellStyle(getShellStyle() | SWT.RESIZE); myView = view; } /** * @generated */ protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); getShell().setText(Messages.ClassdiagramsElementChooserDialog_SelectModelElementTitle); createModelBrowser(composite); return composite; } /** * @generated */ protected Control createButtonBar(Composite parent) { Control buttonBar = super.createButtonBar(parent); setOkButtonEnabled(false); return buttonBar; } /** * @generated */ private void createModelBrowser(Composite composite) { myTreeViewer = new TreeViewer(composite, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); GridData layoutData = new GridData(GridData.FILL_BOTH); layoutData.heightHint = 300; layoutData.widthHint = 300; myTreeViewer.getTree().setLayoutData(layoutData); myTreeViewer.setContentProvider(new ModelElementsTreeContentProvider()); myTreeViewer.setLabelProvider(new ModelElementsTreeLabelProvider()); myTreeViewer.setInput(ResourcesPlugin.getWorkspace().getRoot()); myTreeViewer.addFilter(new ModelFilesFilter()); myTreeViewer.addSelectionChangedListener(new OkButtonEnabler()); } /** * @generated */ private void setOkButtonEnabled(boolean enabled) { getButton(IDialogConstants.OK_ID).setEnabled(enabled); } /** * @generated */ private boolean isValidModelFile(IFile file) { String fileExtension = file.getFullPath().getFileExtension(); return "bum".equals(fileExtension); //$NON-NLS-1$ } /** * @generated */ public URI getSelectedModelElementURI() { return mySelectedModelElementURI; } /** * @generated */ public int open() { int result = super.open(); for (Resource resource : myEditingDomain.getResourceSet().getResources()) { resource.unload(); } myEditingDomain.dispose(); return result; } /** * @generated */ private class ModelElementsTreeContentProvider implements ITreeContentProvider { /** * @generated */ private ITreeContentProvider myWorkbenchContentProvider = new WorkbenchContentProvider(); /** * @generated */ private AdapterFactoryContentProvider myAdapterFctoryContentProvier = new AdapterFactoryContentProvider( ClassdiagramsDiagramEditorPlugin.getInstance().getItemProvidersAdapterFactory()); /** * @generated */ public Object[] getChildren(Object parentElement) { Object[] result = myWorkbenchContentProvider.getChildren(parentElement); if (result != null && result.length > 0) { return result; } if (parentElement instanceof IFile) { IFile modelFile = (IFile) parentElement; IPath resourcePath = modelFile.getFullPath(); ResourceSet resourceSet = myEditingDomain.getResourceSet(); try { Resource modelResource = resourceSet .getResource(URI.createPlatformResourceURI(resourcePath.toString(), true), true); return myAdapterFctoryContentProvier.getChildren(modelResource); } catch (WrappedException e) { ClassdiagramsDiagramEditorPlugin.getInstance() .logError("Unable to load resource: " + resourcePath.toString(), e); //$NON-NLS-1$ } return Collections.EMPTY_LIST.toArray(); } return myAdapterFctoryContentProvier.getChildren(parentElement); } /** * @generated */ public Object getParent(Object element) { Object parent = myWorkbenchContentProvider.getParent(element); if (parent != null) { return parent; } if (element instanceof EObject) { EObject eObject = (EObject) element; if (eObject.eContainer() == null && eObject.eResource().getURI().isFile()) { String path = eObject.eResource().getURI().path(); return ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(new Path(path)); } return myAdapterFctoryContentProvier.getParent(eObject); } return null; } /** * @generated */ public boolean hasChildren(Object element) { if (element instanceof IFile) { return isValidModelFile((IFile) element); } return myWorkbenchContentProvider.hasChildren(element) || myAdapterFctoryContentProvier.hasChildren(element); } /** * @generated */ public Object[] getElements(Object inputElement) { Object[] elements = myWorkbenchContentProvider.getElements(inputElement); return elements; } /** * @generated */ public void dispose() { myWorkbenchContentProvider.dispose(); myAdapterFctoryContentProvier.dispose(); } /** * @generated */ public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { myWorkbenchContentProvider.inputChanged(viewer, oldInput, newInput); myAdapterFctoryContentProvier.inputChanged(viewer, oldInput, newInput); } } /** * @generated */ private class ModelElementsTreeLabelProvider implements ILabelProvider { /** * @generated */ private WorkbenchLabelProvider myWorkbenchLabelProvider = new WorkbenchLabelProvider(); /** * @generated */ private AdapterFactoryLabelProvider myAdapterFactoryLabelProvider = new AdapterFactoryLabelProvider( ClassdiagramsDiagramEditorPlugin.getInstance().getItemProvidersAdapterFactory()); /** * @generated */ public Image getImage(Object element) { Image result = myWorkbenchLabelProvider.getImage(element); return result != null ? result : myAdapterFactoryLabelProvider.getImage(element); } /** * @generated */ public String getText(Object element) { String result = myWorkbenchLabelProvider.getText(element); return result != null && result.length() > 0 ? result : myAdapterFactoryLabelProvider.getText(element); } /** * @generated */ public void addListener(ILabelProviderListener listener) { myWorkbenchLabelProvider.addListener(listener); myAdapterFactoryLabelProvider.addListener(listener); } /** * @generated */ public void dispose() { myWorkbenchLabelProvider.dispose(); myAdapterFactoryLabelProvider.dispose(); } /** * @generated */ public boolean isLabelProperty(Object element, String property) { return myWorkbenchLabelProvider.isLabelProperty(element, property) || myAdapterFactoryLabelProvider.isLabelProperty(element, property); } /** * @generated */ public void removeListener(ILabelProviderListener listener) { myWorkbenchLabelProvider.removeListener(listener); myAdapterFactoryLabelProvider.removeListener(listener); } } /** * @generated */ private class ModelFilesFilter extends ViewerFilter { /** * @generated */ public boolean select(Viewer viewer, Object parentElement, Object element) { if (element instanceof IContainer) { return true; } if (element instanceof IFile) { IFile file = (IFile) element; return isValidModelFile(file); } return true; } } /** * @generated */ private class OkButtonEnabler implements ISelectionChangedListener { /** * @generated */ public void selectionChanged(SelectionChangedEvent event) { if (event.getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); if (selection.size() == 1) { Object selectedElement = selection.getFirstElement(); if (selectedElement instanceof IWrapperItemProvider) { selectedElement = ((IWrapperItemProvider) selectedElement).getValue(); } if (selectedElement instanceof FeatureMap.Entry) { selectedElement = ((FeatureMap.Entry) selectedElement).getValue(); } if (selectedElement instanceof EObject) { EObject selectedModelElement = (EObject) selectedElement; setOkButtonEnabled(ViewService.getInstance().provides(Node.class, new EObjectAdapter(selectedModelElement), myView, null, ViewUtil.APPEND, true, ClassdiagramsDiagramEditorPlugin.DIAGRAM_PREFERENCES_HINT)); mySelectedModelElementURI = EcoreUtil.getURI(selectedModelElement); return; } } } mySelectedModelElementURI = null; setOkButtonEnabled(false); } } }