is Enclosing Annotated - Java java.lang.annotation

Java examples for java.lang.annotation:Annotation Attribute

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Description

is Enclosing Annotated

Demo Code

/*/*www.ja  v a2s  . co  m*/
 * Copyright (c) 2014 by Malte Isberner (https://github.com/misberner).
 * 
 * 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 com.java2s;
import java.lang.annotation.Annotation;

import javax.lang.model.element.Element;

public class Main {
    @SafeVarargs
    public static boolean isEnclosingAnnotated(Element elem,
            boolean onlyDirect,
            Class<? extends Annotation>... expectedAnnotations) {
        if (onlyDirect) {
            return isParentAnnotated(elem, expectedAnnotations);
        }
        return isAncestorAnnotated(elem, expectedAnnotations);
    }

    @SafeVarargs
    public static boolean isParentAnnotated(Element elem,
            Class<? extends Annotation>... expectedAnnotations) {
        if (elem == null) {
            return false;
        }
        Element parent = elem.getEnclosingElement();
        return isAnnotated(parent, expectedAnnotations);
    }

    @SafeVarargs
    public static boolean isAncestorAnnotated(Element elem,
            Class<? extends Annotation>... expectedAnnotations) {
        Element curr = elem;
        while (curr != null) {
            if (isAnnotated(curr, expectedAnnotations)) {
                return true;
            }
            curr = curr.getEnclosingElement();
        }
        return false;
    }

    @SafeVarargs
    public static boolean isAnnotated(Element elem,
            Class<? extends Annotation>... expectedAnnotations) {
        if (elem == null) {
            return false;
        }

        for (Class<? extends Annotation> annotationType : expectedAnnotations) {
            if (elem.getAnnotation(annotationType) != null) {
                return true;
            }
        }
        return false;
    }
}

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