com.nec.strudel.entity.EntityUtil.java Source code

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Here is the source code for com.nec.strudel.entity.EntityUtil.java

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/*******************************************************************************
 * Copyright 2015 Junichi Tatemura
 *
 * 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.nec.strudel.entity;

import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.PropertyUtils;

public final class EntityUtil {

    private EntityUtil() {
        // not instantiated
    }

    public static Object getProperty(Object entity, String name) {
        try {
            return PropertyUtils.getProperty(entity, name);
        } catch (IllegalAccessException ex) {
            throw new RuntimeException(ex); // TODO refactor
        } catch (InvocationTargetException ex) {
            throw new RuntimeException(ex); // TODO refactor
        } catch (NoSuchMethodException ex) {
            throw new RuntimeException(ex); // TODO refactor
        }
    }

    public static void setProperty(Object entity, String name, Object value) {
        try {
            BeanUtils.setProperty(entity, name, value);
        } catch (IllegalAccessException ex) {
            throw new RuntimeException(ex); // TODO refactor
        } catch (InvocationTargetException ex) {
            throw new RuntimeException(ex); // TODO refactor
        }
    }

    public static String toString(Object entity) {
        return describe(entity).toString();
    }

    public static boolean equals(Object entity1, Object entity2) {
        if (entity1 == entity2) {
            return true;
        }
        if (entity1 == null || entity2 == null) {
            return false;
        }
        if (entity1.getClass().equals(entity2.getClass())) {
            return describe(entity1).equals(describe(entity2));
        }
        return false;
    }

    private static final int HASH_BASE = 31;

    public static int hashCode(Object entity) {
        int hashCode = entity.getClass().hashCode();
        hashCode = hashCode * HASH_BASE + describe(entity).hashCode();
        return hashCode;
    }

    public static Map<String, String> describe(Object entity) {
        try {
            return BeanUtils.describe(entity);
        } catch (IllegalAccessException ex) {
            throw new RuntimeException(ex); // TODO refactor
        } catch (InvocationTargetException ex) {
            throw new RuntimeException(ex); // TODO refactor
        } catch (NoSuchMethodException ex) {
            throw new RuntimeException(ex); // TODO refactor
        }
    }

}