| /****************************************************************************** |
| * Copyright (c) 2002, 2003 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| ****************************************************************************/ |
| |
| |
| package org.eclipse.gmf.runtime.common.ui.services.properties; |
| |
| import org.eclipse.gmf.runtime.common.core.service.IOperation; |
| import org.eclipse.gmf.runtime.common.core.service.IProvider; |
| |
| /** |
| * An operation which will execute providers in order of priorities (from |
| * HIGHEST to LOWEST), obtain a property source from each, and append each result |
| * into a linked list of <code>ICompositePropertySource</code> property source |
| * objects. |
| */ |
| |
| public class GetPropertySourceOperation implements IOperation { |
| |
| private Object object; |
| |
| private ICompositePropertySource propertySource; |
| |
| /** |
| * Create a GetPropertySourceOperation instance |
| * |
| * @param object - |
| * target of the properties |
| */ |
| public GetPropertySourceOperation(Object object) { |
| |
| this.object = object; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.core.service.IOperation#execute(org.eclipse.gmf.runtime.common.core.service.IProvider) |
| */ |
| public Object execute(IProvider provider) { |
| assert null!= provider : "provider cannot be null"; //$NON-NLS-1$ |
| |
| if (provider instanceof IPropertiesProvider) { |
| IPropertiesProvider propertieProvider = (IPropertiesProvider) provider; |
| ICompositePropertySource result = propertieProvider |
| .getPropertySource(object); |
| |
| if (result != null) |
| PropertiesService.getInstance().applyModifiers( |
| propertieProvider, result); |
| |
| if (propertySource == null) { |
| propertySource = result; |
| return propertySource; |
| } |
| |
| if (result != null) |
| propertySource.addPropertySource(result); |
| |
| } |
| return propertySource; |
| } |
| |
| /** |
| * Returns the propertySource - a linked list of |
| * <code>ICompositePropertySource</code> property source objects. |
| * |
| * @return ICompositePropertySource - the propertySource |
| */ |
| public ICompositePropertySource getPropertySource() { |
| return propertySource; |
| } |
| |
| /** |
| * Returns the object - target of the properties |
| * |
| * @return Object - target of the properties |
| */ |
| public Object getObject() { |
| return object; |
| } |
| |
| } |