Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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.
 */

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Field;
import java.security.AccessController;
import java.security.PrivilegedAction;

import javax.xml.bind.annotation.XmlEnumValue;

public class Main {
    /**
     * @param clazz
     * @return namespace of root element qname or null if this is not object does not represent a root element
     */
    public static String getEnumValue(Enum<?> myEnum) {
        Field f;
        String value;
        try {
            f = myEnum.getClass().getField(myEnum.name());

            f.setAccessible(true);

            XmlEnumValue xev = (XmlEnumValue) getAnnotation(f, XmlEnumValue.class);
            if (xev == null) {
                value = f.getName();
            } else {
                value = xev.value();
            }
        } catch (SecurityException e) {
            value = null;
        } catch (NoSuchFieldException e) {
            value = null;
        }

        return value;
    }

    /**
     * Get an annotation.  This is wrappered to avoid a Java2Security violation.
     * @param cls Class that contains annotation 
     * @param annotation Class of requrested Annotation
     * @return annotation or null
     */
    private static <T extends Annotation> T getAnnotation(final AnnotatedElement element,
            final Class<T> annotation) {
        return AccessController.doPrivileged(new PrivilegedAction<T>() {
            public T run() {
                return element.getAnnotation(annotation);
            }
        });
    }
}