xmlserializer.java

国外的一套开源CRM

/*
 * $Id: XmlSerializer.java,v 1.3 2004/01/20 15:55:18 ajzeneski Exp $
 *
 *  Copyright (c) 2001, 2002 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.entity.serialize;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.Stack;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.Vector;
import java.util.WeakHashMap;

import javax.xml.parsers.ParserConfigurationException;

import org.ofbiz.base.util.UtilMisc;
import org.ofbiz.base.util.UtilXml;
import org.ofbiz.base.util.Debug;
import org.ofbiz.entity.GenericDelegator;
import org.ofbiz.entity.GenericPK;
import org.ofbiz.entity.GenericValue;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

/**
 * <p><b>Title:</b> XmlSerializer
 * <p><b>Description:</b> Simple XML serialization/deserialization routines with embedded type information
 *
 * @author     <a href="mailto:[e-mail]">David E. Jones</a> 
 * @version    $Revision: 1.3 $
 * @since      2.0
 */
public class XmlSerializer {
    public static final String module = XmlSerializer.class.getName();

    private static WeakReference simpleDateFormatter;

    public static String serialize(Object object) throws SerializeException, FileNotFoundException, IOException {
        Document document = UtilXml.makeEmptyXmlDocument("ofbiz-ser");
        Element rootElement = document.getDocumentElement();

        rootElement.appendChild(serializeSingle(object, document));
        return UtilXml.writeXmlDocument(document);
    }

    public static Object deserialize(String content, GenericDelegator delegator)
        throws SerializeException, SAXException, ParserConfigurationException, IOException {
        // readXmlDocument with false second parameter to disable validation
        Document document = UtilXml.readXmlDocument(content, false);
        if (document != null) {
            Element rootElement = document.getDocumentElement();
            // find the first element below the root element, that should be the object
            Node curChild = rootElement.getFirstChild();

            while (curChild != null && curChild.getNodeType() != Node.ELEMENT_NODE) {
                curChild = curChild.getNextSibling();
            }
            if (curChild == null) return null;
            Element element = (Element) curChild;

            return deserializeSingle(element, delegator);
        } else {
            Debug.logWarning("Serialized document came back null", module);
            return null;
        }
    }

    public static Element serializeSingle(Object object, Document document) throws SerializeException {
        if (document == null) return null;

        if (object == null) return document.createElement("null");

        // - Standard Objects -
        if (object instanceof String) {
            return makeElement("std-String", object, document);
        } else if (object instanceof Integer) {
            return makeElement("std-Integer", object, document);
        } else if (object instanceof Long) {
            return makeElement("std-Long", object, document);
        } else if (object instanceof Float) {
            return makeElement("std-Float", object, document);
        } else if (object instanceof Double) {
            return makeElement("std-Double", object, document);
        } else if (object instanceof Boolean) {
            return makeElement("std-Boolean", object, document);
        } else if (object instanceof Locale) {
            return makeElement("std-Locale", object, document);
            // - SQL Objects -
        } else if (object instanceof java.sql.Timestamp) {
            return makeElement("sql-Timestamp", object, document);
        } else if (object instanceof java.sql.Date) {
            return makeElement("sql-Date", object, document);
        } else if (object instanceof java.sql.Time) {
            return makeElement("sql-Time", object, document);
        } else if (object instanceof java.util.Date) {
            // NOTE: make sure this is AFTER the java.sql date/time objects since they inherit from java.util.Date
            DateFormat formatter = getDateFormat();
            String stringValue = null;

            synchronized (formatter) {
                stringValue = formatter.format((java.util.Date) object);
            }
            return makeElement("std-Date", stringValue, document);
            // return makeElement("std-Date", object, document);
        } else if (object instanceof Collection) {
            // - Collections -
            String elementName = null;

            // these ARE order sensitive; for instance Stack extends Vector, so if Vector were first we would lose the stack part
            if (object instanceof ArrayList) {
                elementName = "col-ArrayList";
            } else if (object instanceof LinkedList) {
                elementName = "col-LinkedList";
            } else if (object instanceof Stack) {
                elementName = "col-Stack";
            } else if (object instanceof Vector) {
                elementName = "col-Vector";
            } else if (object instanceof TreeSet) {
                elementName = "col-TreeSet";
            } else if (object instanceof HashSet) {
                elementName = "col-HashSet";
            } else {
                // no specific type found, do general Collection, will deserialize as LinkedList
                elementName = "col-Collection";
            }

            // if (elementName == null) return serializeCustom(object, document);

            Collection value = (Collection) object;
            Element element = document.createElement(elementName);
            Iterator iter = value.iterator();

            while (iter.hasNext()) {
                element.appendChild(serializeSingle(iter.next(), document));
            }
            return element;
        } else if (object instanceof GenericPK) {
            // Do GenericEntity objects as a special case, use std XML import/export routines
            GenericPK value = (GenericPK) object;

            return value.makeXmlElement(document, "eepk-");
        } else if (object instanceof GenericValue) {
            GenericValue value = (GenericValue) object;

            return value.makeXmlElement(document, "eeval-");
        } else if (object instanceof Map) {
            // - Maps -
            String elementName = null;

            // these ARE order sensitive; for instance Properties extends Hashtable, so if Hashtable were first we would lose the Properties part
            if (object instanceof HashMap) {
                elementName = "map-HashMap";
            } else if (object instanceof Properties) {
                elementName = "map-Properties";
            } else if (object instanceof Hashtable) {
                elementName = "map-Hashtable";
            } else if (object instanceof WeakHashMap) {
                elementName = "map-WeakHashMap";
            } else if (object instanceof TreeMap) {
                elementName = "map-TreeMap";
            } else {
                // serialize as a simple Map implementation if nothing else applies, these will deserialize as a HashMap
                elementName = "map-Map";
            }

            Element element = document.createElement(elementName);
            Map value = (Map) object;
            Iterator iter = value.entrySet().iterator();

            while (iter.hasNext()) {
                Map.Entry entry = (Map.Entry) iter.next();

                Element entryElement = document.createElement("map-Entry");

                element.appendChild(entryElement);