org.faster.util.Beans.java Source code

Introduction

Here is the source code for org.faster.util.Beans.java

Source

/*
 * Copyright (c) 2013 @iSQWEN. All rights reserved.
 *
 * 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 org.faster.util;

import org.apache.commons.beanutils.WrapDynaBean;

import java.util.Map;

/**
 * @author sqwen
 */
public final class Beans {

    private Beans() {
    }

    public static <T> T newInstance(Class<T> clazz) {
        try {
            return clazz.newInstance();
        } catch (Exception e) {
            throw Exceptions.unchecked(e);
        }
    }

    public static void populate(Object bean, Map<String, ?> map) {
        try {
            org.apache.commons.beanutils.BeanUtils.populate(bean, map);
        } catch (Exception e) {
            throw Exceptions.unchecked(e);
        }
    }

    public static void slicePopulate(Object bean, Map<String, ?> map, String... slicePropertyNames) {
        Map<String, ?> sliceMap = Maps.slice(map, slicePropertyNames);
        populate(bean, sliceMap);
    }

    public static Object getProperty(Object bean, String propertyName) {
        return new WrapDynaBean(bean).get(propertyName);
    }

    public static void setProperty(Object bean, String propertyName, Object propertyValue) {
        try {
            org.apache.commons.beanutils.BeanUtils.setProperty(bean, propertyName, propertyValue);
        } catch (Exception e) {
            throw Exceptions.unchecked(e);
        }
    }

    public static void populate(Object dest, Object orig) {
        try {
            org.apache.commons.beanutils.BeanUtils.copyProperties(dest, orig);
        } catch (Exception e) {
            throw Exceptions.unchecked(e);
        }
    }

    /**
     * ??
     *
     * @param dest 
     * @param orig 
     * @param slicePropertyNames ??
     */
    public static void slicePopulate(Object dest, Object orig, String... slicePropertyNames) {
        slicePopulate(dest, orig, true, slicePropertyNames);
    }

    public static boolean isNullOrEmpty(Object value) {
        if (value == null) {
            return true;
        }

        if (value instanceof String) {
            if (((String) value).trim().isEmpty()) {
                return true;
            }
        }

        return false;
    }

    /**
     * ??
     *
     * @param dest 
     * @param orig 
     * @param ignoreNullValue ?
     * @param propertyNames ??
     */
    public static void slicePopulate(Object dest, Object orig, boolean ignoreNullValue, String... propertyNames) {
        WrapDynaBean destBean = new WrapDynaBean(dest);
        WrapDynaBean origBean = new WrapDynaBean(orig);
        for (String propertyName : propertyNames) {
            Object value = origBean.get(propertyName);
            if (ignoreNullValue && isNullOrEmpty(value)) {
                continue;
            }

            destBean.set(propertyName, value);
        }
    }

    public static <T> T slice(T orig, String... propertyNames) {
        return slice(orig, true, propertyNames);
    }

    @SuppressWarnings("unchecked")
    public static <T> T slice(T orig, boolean ignoreNullValue, String... propertyNames) {
        if (propertyNames == null || propertyNames.length == 0) {
            return orig;
        }

        T dest = (T) Beans.newInstance(orig.getClass());
        WrapDynaBean destBean = new WrapDynaBean(dest);
        WrapDynaBean origBean = new WrapDynaBean(orig);
        for (String propertyName : propertyNames) {
            Object value = origBean.get(propertyName);
            if (ignoreNullValue && Beans.isNullOrEmpty(value)) {
                continue;
            }

            destBean.set(propertyName, value);
        }
        return dest;
    }

}