/*
 * 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 java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

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

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

/**
 *<B>Title:</B> Query is Serializable
 *<BR>
 *<B>Keywords:</B> query
 *<BR>
 *<B>Assertion ID:</B> A14.3-7 A14.6-1.
 *<BR>
 *<B>Assertion Description: </B> The class implementing the <code>Query</code>
 *interface must be serializable.  The serialized fields include the candidate
 *class, the filter, parameter declarations, variable declarations, imports,
 *and ordering specification.
 */

public class QueryIsSerializable extends QueryTest {

    /** */
    private static final String ASSERTION_FAILED = 
        "Assertion A14.3-7 A14.6-1 (QueryIsSerializable) 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(QueryIsSerializable.class);
    }

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

        initDatabase(pm, PCPoint.class);
        runTestQueryIsSerializable01(pm);
        runTestQueryIsSerializable02(pm);
        runTestQueryIsSerializable03(pm);
        
        pm.close();
        pm = null;
    }

    /** */
    void runTestQueryIsSerializable01(PersistenceManager pm) {
        if (debug) logger.debug("\nExecuting test QueryIsSerializable01() ...");

        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();

            Query query = pm.newQuery();
            if (query instanceof Serializable) { 
                if (debug) {
                    logger.debug("Query extends serializable interface.");
                }
            } 
            else {
                fail(ASSERTION_FAILED,
                     "Query does not extends serializable interface.");
            }

            tx.rollback();
            tx = null;
        }
        finally {
            if ((tx != null) && tx.isActive())
                tx.rollback();
        }
    }

    /** */
    void runTestQueryIsSerializable02(PersistenceManager pm) throws Exception {
        if (debug) logger.debug("\nExecuting test QueryIsSerializable02() ...");

        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();

            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.flush();} catch(Exception ex) {}
                    try { oos.close();} catch(Exception ex) {}
                }
            }

            tx.commit();
            tx = null;
        }
        finally {
            if ((tx != null) && tx.isActive())
                tx.rollback();
        }
    }

    /** */
    void runTestQueryIsSerializable03(PersistenceManager pm) throws Exception {
        if (debug) logger.debug("\nExecuting test QueryIsSerializable03() ...");
        Object restoredQuery = null;
        ObjectInputStream ois = null;

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

        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();

            Query query = pm.newQuery(restoredQuery);
            query.setCandidates(pm.getExtent(PCPoint.class, false));
            query.compile();
            Object results = query.execute();

            // check query result
            List expected = new ArrayList();
            Object p4 = new PCPoint(3, 3);
            expected.add(p4);
            expected = getFromInserted(expected);
            printOutput(results, expected);
            checkQueryResultWithoutOrder(ASSERTION_FAILED, results, expected);
            if (debug) logger.debug("Test QueryIsSerializable03(): Passed");
            
            tx.commit();
            tx = null;
        }
        finally {
            if ((tx != null) && tx.isActive())
                tx.rollback();
        }
    }
}