utilobject.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

/*
 * $Id: UtilObject.java 5462 2005-08-05 18:35:48Z jonesde $
 *
 *  Copyright (c) 2004 The Open For Business Project - www.ofbiz.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"),
 *  to deal in the Software without restriction, including without limitation
 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *  and/or sell copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included
 *  in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 *  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.ofbiz.base.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

/**
 * UtilObject
 *
 * @author     <a href="mailto:[e-mail]">Andy Zeneski</a>
 * @version    $Rev: 5462 $
 * @since      3.1
 */
public class UtilObject {

    public static final String module = UtilObject.class.getName();

    /** Serialize an object to a byte array */
    public static byte[] getBytes(Object obj) {
        ByteArrayOutputStream bos = null;
        ObjectOutputStream oos = null;
        byte[] data = null;
        try {
            bos = new ByteArrayOutputStream();
            oos = new ObjectOutputStream(bos);
            oos.writeObject(obj);
            data = bos.toByteArray();
        } catch (IOException e) {
            Debug.logError(e, module);
        } finally {
            try {
                if (oos != null) {
                    oos.flush();
                    oos.close();
                }
                if (bos != null) {
                    bos.close();
                }
            } catch (IOException e) {
                Debug.logError(e, module);
            }
        }

        return data;
    }
    
    public static long getByteCount(Object obj) {
        OutputStreamByteCount osbc = null;
        ObjectOutputStream oos = null;        
        try {
            osbc = new OutputStreamByteCount();
            oos = new ObjectOutputStream(osbc);
            oos.writeObject(obj);
        } catch (IOException e) {
            Debug.logError(e, module);
        } finally {
            try {
                if (oos != null) {
                    oos.flush();
                    oos.close();
                }
                if (osbc != null) {
                    osbc.close();
                }
            } catch (IOException e) {
                Debug.logError(e, module);
            }
        }
        if (osbc != null) {
            return osbc.getByteCount();
        } else {
            return 0;
        }
    }
    
    /** Deserialize a byte array back to an object */
    public static Object getObject(byte[] bytes) {
        ByteArrayInputStream bis = null;
        ObjectInputStream ois = null;
        Object obj = null;

        try {
            bis = new ByteArrayInputStream(bytes);
            ois = new ObjectInputStream(bis, Thread.currentThread().getContextClassLoader());
            obj = ois.readObject();
        } catch (ClassNotFoundException e) {
            Debug.logError(e, module);
        } catch (IOException e) {
            Debug.logError(e, module);
        } finally {
            try {
                if (ois != null) {
                    ois.close();
                }
                if (bis != null) {
                    bis.close();
                }
            } catch (IOException e) {
                Debug.logError(e, module);
            }
        }

        return obj;
    }

    public static boolean equalsHelper(Object o1, Object o2) {
        if (o1 == o2) {
            // handles same-reference, or null
            return true;
        } else if (o1 == null || o2 == null) {
            // either o1 or o2 is null, but not both
            return false;
        } else {
            return o1.equals(o2);
        }
    }

    public static int compareToHelper(Comparable o1, Object o2) {
        if (o1 == o2) {
            // handles same-reference, or null
            return 0;
        } else if (o1 == null) {
            return -1;
        } else if (o2 == null) {
            // either o1 or o2 is null, but not both
            return 1;
        } else {
            return o1.compareTo(o2);
        }
    }

    public static int doHashCode(Object o1) {
        if (o1 == null) return 0;
        return o1.hashCode();
    }
}