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mango is a dao framework.
There is a newer version: 1.06
/*
 * Copyright 2014 mango.concurrent.cc
 *
 * The Netty Project 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 cc.concurrent.mango.util.reflect;

import cc.concurrent.mango.util.concurrent.CacheLoader;
import cc.concurrent.mango.util.concurrent.DoubleCheckCache;
import cc.concurrent.mango.util.concurrent.LoadingCache;

import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.*;

/**
 * @author ash
 */
public class BeanInfoCache {

    public static Method getReadMethod(Class clazz, String propertyName) {
        return cache.getUnchecked(clazz).getReadMethod(propertyName);
    }

    public static Method getWriteMethod(Class clazz, String propertyName) {
        return cache.getUnchecked(clazz).getWriteMethod(propertyName);
    }

    public static List getPropertyDescriptors(Class clazz) {
        return cache.getUnchecked(clazz).getPropertyDescriptors();
    }

    private final static LoadingCache, BeanInfo> cache = new DoubleCheckCache, BeanInfo>(
            new CacheLoader, BeanInfo>() {
                public BeanInfo load(Class clazz) throws Exception {
                    return new BeanInfo(clazz);
                }
            });

    private static class BeanInfo {

        final List propertyDescriptors;
        final Map readMethodMap;
        final Map writeMethodMap;

        public BeanInfo(Class clazz) throws Exception {
            Map rmm = new HashMap();
            Map wmm = new HashMap();
            List pds = new ArrayList();

            java.beans.BeanInfo beanInfo = Introspector.getBeanInfo(clazz);
            for (PropertyDescriptor pd : beanInfo.getPropertyDescriptors()) {
                pds.add(pd);
                String name = pd.getName();
                Method readMethod = pd.getReadMethod();
                if (readMethod != null) {
                    rmm.put(name, readMethod);
                }
                Method writeMethod = pd.getWriteMethod();
                if (writeMethod != null) {
                    wmm.put(name, writeMethod);
                }
            }

            propertyDescriptors = Collections.unmodifiableList(pds);
            readMethodMap = Collections.unmodifiableMap(rmm);
            writeMethodMap = Collections.unmodifiableMap(wmm);
        }

        public Method getReadMethod(String propertyName) {
            return readMethodMap.get(propertyName);
        }

        public Method getWriteMethod(String propertyName) {
            return writeMethodMap.get(propertyName);
        }

        public List getPropertyDescriptors() {
            return propertyDescriptors;
        }

    }

}