org.jabsorb.ng.serializer.impl.DateSerializer.java Source code

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Here is the source code for org.jabsorb.ng.serializer.impl.DateSerializer.java

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/*
 * jabsorb - a Java to JavaScript Advanced Object Request Broker
 * http://www.jabsorb.org
 *
 * Copyright 2007-2009 The jabsorb team
 *
 * based on original code from
 * JSON-RPC-Java - a JSON-RPC to Java Bridge with dynamic invocation
 *
 * Copyright Metaparadigm Pte. Ltd. 2004.
 * Michael Clark <michael@metaparadigm.com>
 *
 * 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.jabsorb.ng.serializer.impl;

import java.sql.Time;
import java.sql.Timestamp;
import java.util.Date;

import org.jabsorb.ng.serializer.AbstractSerializer;
import org.jabsorb.ng.serializer.MarshallException;
import org.jabsorb.ng.serializer.ObjectMatch;
import org.jabsorb.ng.serializer.SerializerState;
import org.jabsorb.ng.serializer.UnmarshallException;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * Serialises date and time values
 */
public class DateSerializer extends AbstractSerializer {

    /**
     * Classes that this can serialise to.
     */
    private static Class<?>[] _JSONClasses = new Class<?>[] { JSONObject.class };

    /**
     * Classes that this can serialise.
     */
    private static Class<?>[] _serializableClasses = new Class<?>[] { Date.class, Timestamp.class,
            java.sql.Date.class, Time.class };

    /**
     * Unique serialisation id.
     */
    private static final long serialVersionUID = 2;

    @Override
    public Class<?>[] getJSONClasses() {

        return _JSONClasses;
    }

    @Override
    public Class<?>[] getSerializableClasses() {

        return _serializableClasses;
    }

    @Override
    public Object marshall(final SerializerState state, final Object p, final Object o) throws MarshallException {

        long time;
        if (o instanceof Date) {
            time = ((Date) o).getTime();
        } else {
            throw new MarshallException("cannot marshall date using class " + o.getClass());
        }
        final JSONObject obj = new JSONObject();
        try {
            if (ser.getMarshallClassHints()) {
                obj.put("javaClass", o.getClass().getName());
            }
            obj.put("time", time);
        } catch (final JSONException e) {
            throw new MarshallException(e.getMessage(), e);
        }
        return obj;
    }

    @Override
    public ObjectMatch tryUnmarshall(final SerializerState state, final Class<?> clazz, final Object o)
            throws UnmarshallException {

        final JSONObject jso = (JSONObject) o;
        String java_class;
        try {
            java_class = jso.getString("javaClass");
        } catch (final JSONException e) {
            throw new UnmarshallException("no type hint", e);
        }
        if (java_class == null) {
            throw new UnmarshallException("no type hint");
        }
        if (!(java_class.equals("java.util.Date")) && !(java_class.equals("java.sql.Timestamp"))
                && !(java_class.equals("java.sql.Time")) && !(java_class.equals("java.sql.Date"))) {
            throw new UnmarshallException("not a Date");
        }
        state.setSerialized(o, ObjectMatch.OKAY);
        return ObjectMatch.OKAY;
    }

    @Override
    public Object unmarshall(final SerializerState state, Class<?> clazz, final Object o)
            throws UnmarshallException {

        final JSONObject jso = (JSONObject) o;
        long time;
        try {
            time = jso.getLong("time");
        } catch (final JSONException e) {
            throw new UnmarshallException("Could not get the time in date serialiser", e);
        }
        if (jso.has("javaClass")) {
            try {
                clazz = Class.forName(jso.getString("javaClass"));
            } catch (final ClassNotFoundException e) {
                throw new UnmarshallException(e.getMessage(), e);
            } catch (final JSONException e) {
                throw new UnmarshallException("Could not find javaClass", e);
            }
        }
        Object returnValue = null;
        if (Date.class.equals(clazz)) {
            returnValue = new Date(time);
        } else if (Timestamp.class.equals(clazz)) {
            returnValue = new Timestamp(time);
        } else if (java.sql.Date.class.equals(clazz)) {
            returnValue = new java.sql.Date(time);
        } else if (java.sql.Time.class.equals(clazz)) {
            returnValue = new Time(time);
        }
        if (returnValue == null) {
            throw new UnmarshallException("invalid class " + clazz);
        }
        state.setSerialized(o, returnValue);
        return returnValue;
    }

}