/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* 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.errai.codegen.meta;
import java.lang.annotation.Annotation;
import java.util.HashSet;
import java.util.Set;
import org.jboss.errai.common.client.api.Assert;
/**
* Contains shared functionality by all implementations of
* {@link HasAnnotations}.
*
* @author Christian Sadilek<csadilek@redhat.com>
*/
public abstract class AbstractHasAnnotations implements HasAnnotations {
private Set<String> annotationPresentCache = null;
/**
* Checks if the provided annotation is present on this element (type, method,
* field or parameter).
*
* @param annotation
* the annotation type, must not be null.
* @return true if annotation is present, otherwise false.
*/
@Override
public boolean isAnnotationPresent(final Class<? extends Annotation> annotation) {
Assert.notNull(annotation);
if (annotationPresentCache == null) {
annotationPresentCache = new HashSet<String>();
for (final Annotation a : getAnnotations()) {
annotationPresentCache.add(a.annotationType().getName());
}
}
return annotationPresentCache.contains(annotation.getName());
}
}