| /******************************************************************************* |
| * Copyright (c) 2008-2011 Chair for Applied Software Engineering, |
| * Technische Universitaet Muenchen. |
| * 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 |
| * |
| * Contributors: |
| * emueller |
| ******************************************************************************/ |
| package org.eclipse.emf.emfstore.internal.client.ui.views.changes; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.edit.provider.ComposedAdapterFactory; |
| import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; |
| import org.eclipse.emf.emfstore.internal.client.ui.common.OperationCustomLabelProvider; |
| import org.eclipse.emf.emfstore.internal.server.model.versioning.operations.AbstractOperation; |
| import org.eclipse.emf.emfstore.internal.server.model.versioning.operations.CompositeOperation; |
| |
| /** |
| * Default label provider for operations. |
| * |
| * @author emueller |
| * |
| */ |
| public class DefaultOperationLabelProvider implements OperationCustomLabelProvider { |
| |
| /** |
| * The label to be shown for unknown element. |
| */ |
| protected static final String UNKOWN_ELEMENT = Messages.DefaultOperationLabelProvider_UnknownElement; |
| |
| private AdapterFactoryLabelProvider adapterFactoryLabelProvider; |
| private ComposedAdapterFactory adapterFactory; |
| |
| private boolean isDisposed; |
| |
| /** |
| * Constructor. |
| */ |
| public DefaultOperationLabelProvider() { |
| init(); |
| } |
| |
| /** |
| * Initializes the label provider. |
| */ |
| protected void init() { |
| if (adapterFactory == null) { |
| adapterFactory = new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE); |
| } |
| if (adapterFactoryLabelProvider == null) { |
| adapterFactoryLabelProvider = new AdapterFactoryLabelProvider(adapterFactory); |
| } |
| isDisposed = false; |
| } |
| |
| /** |
| * |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.emfstore.internal.client.ui.common.OperationCustomLabelProvider#getDescription(org.eclipse.emf.emfstore.internal.server.model.versioning.operations.AbstractOperation) |
| */ |
| public String getDescription(AbstractOperation operation) { |
| if (operation instanceof CompositeOperation) { |
| final CompositeOperation compositeOperation = (CompositeOperation) operation; |
| // artificial composite because of opposite reference, |
| // take description of main operation |
| if (compositeOperation.getMainOperation() != null) { |
| return getDescription(compositeOperation.getMainOperation()); |
| } |
| } |
| if (isDisposed()) { |
| init(); |
| } |
| return adapterFactoryLabelProvider.getText(operation); |
| } |
| |
| /** |
| * |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.emfstore.internal.client.ui.common.OperationCustomLabelProvider#getImage(org.eclipse.emf.emfstore.internal.server.model.versioning.operations.AbstractOperation) |
| */ |
| public Object getImage(AbstractOperation operation) { |
| if (isDisposed()) { |
| init(); |
| } |
| return adapterFactoryLabelProvider.getImage(operation); |
| } |
| |
| /** |
| * |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.emfstore.internal.client.ui.common.OperationCustomLabelProvider#canRender(org.eclipse.emf.emfstore.internal.server.model.versioning.operations.AbstractOperation) |
| */ |
| public CanRender canRender(AbstractOperation operation) { |
| return CanRender.Yes; |
| } |
| |
| /** |
| * |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.emfstore.internal.client.ui.common.OperationCustomLabelProvider#getModelElementName(org.eclipse.emf.ecore.EObject) |
| */ |
| public String getModelElementName(EObject modelElement) { |
| if (isDisposed()) { |
| init(); |
| } |
| if (modelElement == null) { |
| return UNKOWN_ELEMENT; |
| } |
| |
| // TODO: provide sensible label for given model element |
| return trim(adapterFactoryLabelProvider.getText(modelElement)); |
| } |
| |
| private String trim(Object object) { |
| final String string = object.toString(); |
| final String result = string.trim(); |
| |
| if (result.length() == 0) { |
| return Messages.DefaultOperationLabelProvider_EmptyName; |
| } |
| |
| return result; |
| } |
| |
| /** |
| * |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.emfstore.internal.common.ESDisposable#dispose() |
| */ |
| public void dispose() { |
| if (adapterFactory != null) { |
| adapterFactory.dispose(); |
| adapterFactory = null; |
| } |
| if (adapterFactoryLabelProvider != null) { |
| adapterFactoryLabelProvider.dispose(); |
| adapterFactoryLabelProvider = null; |
| } |
| isDisposed = true; |
| } |
| |
| /** |
| * @return whether the label provider is disposed. A disposed label provider has to be {@link #init() initialized} |
| * again. |
| */ |
| protected boolean isDisposed() { |
| return isDisposed; |
| } |
| |
| /** |
| * Returns the label provider. |
| * |
| * @return the label provider |
| */ |
| protected AdapterFactoryLabelProvider getAdapterFactoryLabelProvider() { |
| return adapterFactoryLabelProvider; |
| } |
| } |