| /******************************************************************************* |
| * Copyright (c) 2010, 2015 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.internal.di; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Type; |
| import java.util.ArrayList; |
| import java.util.List; |
| import javax.inject.Qualifier; |
| import org.eclipse.e4.core.di.suppliers.IObjectDescriptor; |
| |
| public class ObjectDescriptor implements IObjectDescriptor { |
| |
| final private Type desiredType; |
| final private Annotation[] annotations; |
| |
| public ObjectDescriptor(Type desiredType, Annotation[] allAnnotations) { |
| this.desiredType = desiredType; |
| this.annotations = (allAnnotations == null) ? null : qualifiers(allAnnotations); |
| } |
| |
| @Override |
| public Type getDesiredType() { |
| return desiredType; |
| } |
| |
| @Override |
| public boolean hasQualifier(Class<? extends Annotation> clazz) { |
| if (clazz == null) |
| return false; |
| if (annotations == null) |
| return false; |
| for (Annotation annotation : annotations) { |
| if (annotation.annotationType().equals(clazz)) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public Annotation[] getQualifiers() { |
| return annotations; |
| } |
| |
| /** |
| * Returns null if qualifier is not present |
| */ |
| @Override |
| public <T extends Annotation> T getQualifier(Class<T> clazz) { |
| if (clazz == null) |
| return null; |
| if (annotations == null) |
| return null; |
| for (Annotation annotation : annotations) { |
| if (annotation.annotationType().equals(clazz)) |
| return clazz.cast(annotation); |
| } |
| return null; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| if (desiredType instanceof Class<?>) |
| buffer.append(((Class<?>) desiredType).getSimpleName()); |
| else if (desiredType != null) |
| buffer.append(desiredType); |
| if (annotations != null) { |
| buffer.append('['); |
| boolean first = true; |
| for (Annotation annotation : annotations) { |
| if (first) |
| first = false; |
| else |
| buffer.append(','); |
| buffer.append(annotation.toString()); |
| } |
| buffer.append(']'); |
| } |
| return buffer.toString(); |
| } |
| |
| private Annotation[] qualifiers(Annotation[] allAnnotations) { |
| if (allAnnotations.length == 0) |
| return null; |
| Annotation[] result; |
| List<Annotation> qualifiers = new ArrayList<>(); |
| for (Annotation annotation : allAnnotations) { |
| if (annotation.annotationType().isAnnotationPresent(Qualifier.class)) |
| qualifiers.add(annotation); |
| } |
| if (qualifiers.isEmpty()) |
| return null; |
| result = new Annotation[qualifiers.size()]; |
| qualifiers.toArray(result); |
| return result; |
| } |
| |
| } |