trunk/meecrowave-jpa/src/main/java/org/apache/meecrowave/jpa/internal/AutoJpaAnnotationType.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.meecrowave.jpa.internal;

import org.apache.meecrowave.jpa.api.Jpa;

import javax.enterprise.inject.spi.AnnotatedConstructor;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;

import static java.util.Optional.ofNullable;

class AutoJpaAnnotationType<T> implements AnnotatedType<T> {
    private final AnnotatedType<T> delegate;
    private final Set<Annotation> annotations = new HashSet<>();

    AutoJpaAnnotationType(final AnnotatedType<T> delegate) {
        this.delegate = delegate;
        this.annotations.addAll(delegate.getAnnotations());
        this.annotations.add(JpaLiteral.DEFAULT);
    }

    @Override
    public Class<T> getJavaClass() {
        return delegate.getJavaClass();
    }

    @Override
    public Set<AnnotatedConstructor<T>> getConstructors() {
        return delegate.getConstructors();
    }

    @Override
    public Set<AnnotatedMethod<? super T>> getMethods() {
        return delegate.getMethods();
    }

    @Override
    public Set<AnnotatedField<? super T>> getFields() {
        return delegate.getFields();
    }

    @Override
    public Type getBaseType() {
        return delegate.getBaseType();
    }

    @Override
    public Set<Type> getTypeClosure() {
        return delegate.getTypeClosure();
    }

    @Override
    public <T extends Annotation> T getAnnotation(final Class<T> annotationType) {
        return ofNullable(delegate.getAnnotation(annotationType)).orElseGet(() -> annotationType == Jpa.class ? (T) JpaLiteral.DEFAULT : null);
    }

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

    @Override
    public boolean isAnnotationPresent(final Class<? extends Annotation> annotationType) {
        return delegate.isAnnotationPresent(annotationType) || annotationType == Jpa.class;
    }
}