Gets an instance of ClassDescriptor for the specified class. - Java Reflection

Java examples for Reflection:Class

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Description

Gets an instance of ClassDescriptor for the specified class.

Demo Code

/*/*ww w  . ja  v  a  2s. c om*/
 *  Copyright 2004 Clinton Begin
 *
 *  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.
 */
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.WeakHashMap;

public class Main{
    public static void main(String[] argv) throws Exception{
        Class clazz = String.class;
        System.out.println(getClassDescriptor(clazz));
    }
    private static Map<Class<?>, ClassDescriptor> cache = Collections
            .synchronizedMap(new WeakHashMap<Class<?>, ClassDescriptor>());
    /**
     * Gets an instance of ClassDescriptor for the specified class.
     * 
     * @param clazz The class for which to lookup the ClassDescriptor cache.
     * @return The ClassDescriptor cache for the class
     */
    public static ClassDescriptor getClassDescriptor(Class<?> clazz) {
        synchronized (clazz) {
            ClassDescriptor descriptor = cache.get(clazz);

            if (descriptor == null) {
                descriptor = new ClassDescriptor(clazz);
                cache.put(clazz, descriptor);
            }

            return descriptor;
        }
    }
}

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