components/camel-cdi/src/main/java/org/apache/camel/cdi/SyntheticAnnotated.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.cdi;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import javax.enterprise.inject.spi.Annotated;

import static java.util.Arrays.asList;
import static java.util.Collections.unmodifiableSet;
import static java.util.stream.Collectors.toSet;
import static org.apache.camel.cdi.CdiSpiHelper.isAnnotationType;

@Vetoed
final class SyntheticAnnotated implements Annotated {

    private final Class<?> type;

    private final Set<Type> types;

    private final Set<Annotation> annotations;

    private final Class<?> javaClass;

    SyntheticAnnotated(Class<?> type, Set<Type> types, Annotation... annotations) {
        this(type, types, null, asList(annotations));
    }

    SyntheticAnnotated(Class<?> type, Set<Type> types, Collection<Annotation> annotations) {
        this(type, types, null, annotations);
    }

    SyntheticAnnotated(Class<?> type, Set<Type> types, Class<?> javaClass, Annotation... annotations) {
        this(type, types, javaClass, asList(annotations));
    }

    SyntheticAnnotated(Class<?> type, Set<Type> types, Class<?> javaClass, Collection<Annotation> annotations) {
        this.type = type;
        this.types = types;
        this.javaClass  = javaClass;
        this.annotations = new HashSet<>(annotations);
    }

    <A extends Annotation> void addAnnotation(A annotation) {
        annotations.add(annotation);
    }

    @Override
    public Type getBaseType() {
        return type;
    }

    @Override
    public Set<Type> getTypeClosure() {
        return unmodifiableSet(types);
    }

    @Override
    public Set<Annotation> getAnnotations() {
        return unmodifiableSet(annotations);
    }

    @Override
    public <T extends Annotation> T getAnnotation(Class<T> type) {
        return annotations.stream()
            .filter(isAnnotationType(type))
            .findFirst()
            .map(type::cast)
            .orElse(null);
    }

    @Override
    public <T extends Annotation> Set<T> getAnnotations(Class<T> type) {
        return annotations.stream()
            .filter(isAnnotationType(type))
            .map(type::cast)
            .collect(toSet());
    }

    @Override
    public boolean isAnnotationPresent(Class<? extends Annotation> type) {
        return annotations.stream().anyMatch(isAnnotationType(type));
    }

    public Class<?> getJavaClass() {
        return javaClass;
    }
}