/*
 * Copyright 2005 The Apache Software Foundation.
 * 
 * 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.apache.jdo.tck.query;


import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import javax.jdo.PersistenceManager;
import javax.jdo.Query;

import org.apache.jdo.tck.pc.mylib.PCPoint;
import org.apache.jdo.tck.util.BatchTestRunner;

/**
 *<B>Title:</B> Get PersistenceManager From Restored Serialized Query
 *<BR>
 *<B>Keywords:</B> query
 *<BR>
 *<B>Assertion ID:</B> A14.6-3.
 *<BR>
 *<B>Assertion Description: </B> If a <code>Query</code> instance has been restored from a serialized form, <code>Query.getPersistenceManager()</code> returns <code>null</code>.
 */

public class GetPersistenceManagerFromRestoredSerializedQuery
    extends QueryTest {

    /** */
    private static final String ASSERTION_FAILED = 
        "Assertion A14.6-3 (GetPersistenceManagerFromRestoredSerializedQuery) failed: ";

    /**
     * The <code>main</code> is called when the class
     * is directly executed from the command line.
     * @param args The arguments passed to the program.
     */
    public static void main(String[] args) {
        BatchTestRunner.run(GetPersistenceManagerFromRestoredSerializedQuery.class);
    }


    /** */
    public void test() throws Exception {
        pm = getPM();

        // initDatabase(pm, PCPoint.class);
        runTestGetPersistenceManagerFromRestoredSerializedQuery(pm);

        pm.close();
        pm = null;
    }

    /** */
    void serializeQuery(PersistenceManager pm) throws Exception {
        Query query = pm.newQuery();
        query.setClass(PCPoint.class);
        query.setCandidates(pm.getExtent(PCPoint.class, false));
        query.setFilter("x == 3");
        query.compile();
        
        ObjectOutputStream oos = null;
        try {
            if (debug) logger.debug("Attempting to serialize Query object.");
            oos = new ObjectOutputStream(new FileOutputStream(SERIALZED_QUERY));
            oos.writeObject(query);
            if (debug) logger.debug("Query object serialized.");
        } 
        finally {
            if (oos != null) {
                try { oos.close();} catch(Exception ex) {}
            }
        }
    }

    /** */
    void runTestGetPersistenceManagerFromRestoredSerializedQuery(
        PersistenceManager pm) throws Exception {
        if (debug) 
            logger.debug("\nExecuting test GetPersistenceManagerFromRestoredSerializedQuery() ...");
                    
        Query restoredQuery = null;
        ObjectInputStream ois = null;
        PersistenceManager pm1 = null;

        serializeQuery(pm);

        try {
            if (debug) logger.debug("Attempting to de-serialize Query object.");
            ois = new ObjectInputStream(new FileInputStream(SERIALZED_QUERY));
            restoredQuery = (Query)ois.readObject();
            if (restoredQuery == null) {
                fail(ASSERTION_FAILED,
                     "Deserialzed query is null");
            }
            if (debug) logger.debug("Query object restored.");
        } 
        finally {
            if (ois != null) {
                try { ois.close(); } catch(Exception ex) {}
            }
        }

        pm1 = restoredQuery.getPersistenceManager();
        if (pm1 == null) {
            if (debug) 
                logger.debug("Test GetPersistenceManagerFromRestoredSerializedQuery(): Passed");
        } 
        else {  
            fail(ASSERTION_FAILED, 
                 "Deserialzed query instance should not have a pm associated");
        }
    }
}