| /******************************************************************************* |
| * Copyright (c) 2010 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.e4.core.services.internal.context; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationTargetException; |
| import org.eclipse.e4.core.services.injector.IObjectDescriptor; |
| import org.eclipse.e4.core.services.injector.ObjectDescriptorFactory; |
| |
| public class FieldRequestor extends Requestor { |
| |
| final private Field field; |
| |
| public FieldRequestor(Field field, Object requestingObject, boolean track, |
| boolean groupUpdates, boolean optional) { |
| super(requestingObject, track, groupUpdates, optional); |
| this.field = field; |
| } |
| |
| public Object execute() throws InvocationTargetException, InstantiationException { |
| setField(field, actualArgs[0]); |
| return null; |
| } |
| |
| @Override |
| public IObjectDescriptor[] getDependentObjects() { |
| InjectionProperties properties = annotationSupport.getInjectProperties(field); |
| IObjectDescriptor objectDescriptor = ObjectDescriptorFactory.make(field.getGenericType(), |
| properties.getPropertyName(), properties.isOptional()); |
| return new IObjectDescriptor[] { objectDescriptor }; |
| } |
| |
| private boolean setField(Field field, Object value) { |
| Object userObject = getRequestingObject(); |
| if (userObject == null) |
| return false; |
| boolean wasAccessible = true; |
| if (!field.isAccessible()) { |
| field.setAccessible(true); |
| wasAccessible = false; |
| } |
| try { |
| field.set(userObject, value); |
| } catch (IllegalArgumentException e) { |
| logError(field, e); |
| return false; |
| } catch (IllegalAccessException e) { |
| logError(field, e); |
| return false; |
| } finally { |
| if (!wasAccessible) |
| field.setAccessible(false); |
| } |
| return true; |
| } |
| |
| } |