org.jboss.weld.introspector.jlr.WeldAnnotationImpl Maven / Gradle / Ivy

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2008, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.weld.introspector.jlr;

import com.google.common.collect.Multimaps;
import com.google.common.collect.SetMultimap;
import org.jboss.weld.introspector.TypeClosureLazyValueHolder;
import org.jboss.weld.introspector.WeldAnnotation;
import org.jboss.weld.introspector.WeldMethod;
import org.jboss.weld.resources.ClassTransformer;
import org.jboss.weld.util.collections.HashSetSupplier;
import org.jboss.weld.util.reflection.SecureReflections;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 * Represents an annotated annotation
 * 
 * This class is immutable and therefore threadsafe
 *
 * @param 
 * @author Pete Muir
 */
public class WeldAnnotationImpl extends WeldClassImpl implements WeldAnnotation {

    // The annotated members map (annotation -> member with annotation)
    private final SetMultimap, WeldMethod> annotatedMembers;
    // The implementation class of the annotation
    private final Class clazz;
    // The set of abstracted members
    private final Set> members;

    //we can't call this method 'of', cause it won't compile on JDK7
    public static  WeldAnnotation create(Class annotationType, ClassTransformer classTransformer) {
        Map, Annotation> annotationMap = new HashMap, Annotation>();
        annotationMap.putAll(buildAnnotationMap(annotationType.getAnnotations()));
        annotationMap.putAll(buildAnnotationMap(classTransformer.getTypeStore().get(annotationType)));

        Map, Annotation> declaredAnnotationMap = new HashMap, Annotation>();
        declaredAnnotationMap.putAll(buildAnnotationMap(annotationType.getDeclaredAnnotations()));
        declaredAnnotationMap.putAll(buildAnnotationMap(classTransformer.getTypeStore().get(annotationType)));
        return new WeldAnnotationImpl(annotationType, annotationMap, declaredAnnotationMap, classTransformer);
    }

    /**
     * Constructor
     * 

     * Initializes the superclass with the built annotation map
     *
     * @param annotationType The annotation type
     */
    protected WeldAnnotationImpl(Class annotationType, Map, Annotation> annotationMap, Map, Annotation> declaredAnnotationMap, ClassTransformer classTransformer) {
        super(annotationType, annotationType, null, new TypeClosureLazyValueHolder(annotationType), annotationMap, declaredAnnotationMap, classTransformer);
        this.clazz = annotationType;
        members = new HashSet>();
        annotatedMembers = Multimaps.newSetMultimap(new HashMap, Collection>>(), HashSetSupplier.>instance());
        for (Method member : SecureReflections.getDeclaredMethods(clazz)) {
            WeldMethod annotatedMethod = WeldMethodImpl.of(member, this, classTransformer);
            members.add(annotatedMethod);
            for (Annotation annotation : annotatedMethod.getAnnotations()) {
                annotatedMembers.put(annotation.annotationType(), annotatedMethod);
            }
        }
    }

    /**
     * Gets all members of the annotation
     * 

     * Initializes the members first if they are null
     *
     * @return The set of abstracted members
     * @see org.jboss.weld.introspector.WeldAnnotation#getMembers()
     */
    public Set> getMembers() {
        return Collections.unmodifiableSet(members);
    }

    /**
     * Returns the annotated members with a given annotation type
     * 
     * If the annotated members are null, they are initialized first.
     *
     * @param annotationType The annotation type to match
     * @return The set of abstracted members with the given annotation type
     *         present. An empty set is returned if no matches are found
     * @see org.jboss.weld.introspector.WeldAnnotation#getMembers(Class)
     */
    public Set> getMembers(Class annotationType) {
        return Collections.unmodifiableSet(annotatedMembers.get(annotationType));
    }

    /**
     * Gets a string representation of the annotation
     *
     * @return A string representation
     */
    @Override
    public String toString() {
        return getJavaClass().toString();
    }

    @Override
    public Class getDelegate() {
        return clazz;
    }
}