TupleSerialMarshalledBinding.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: TupleSerialMarshalledBinding.java,v 12.1 2005/01/31 19:27:30 mark Exp $
 */

package com.sleepycat.bind.serial;

import com.sleepycat.bind.tuple.MarshalledTupleKeyEntity;
import com.sleepycat.bind.tuple.TupleInput;
import com.sleepycat.bind.tuple.TupleOutput;

public class TupleSerialMarshalledBinding extends TupleSerialBinding {

    public TupleSerialMarshalledBinding(ClassCatalog classCatalog,
                                        Class baseClass) {

        this(new SerialBinding(classCatalog, baseClass));
    }

    public TupleSerialMarshalledBinding(SerialBinding dataBinding) {

        super(dataBinding);
    }

    // javadoc is inherited
    public Object entryToObject(TupleInput tupleInput, Object javaInput) {

        /* Creates the entity by combining the stored key and data.
         * This "tricky" binding returns the stored data as the entity, but
         * first it sets the transient key fields from the stored key.
         */
        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity) javaInput;

        if (tupleInput != null) { // may be null if not used by key extractor
            entity.unmarshalPrimaryKey(tupleInput);
        }
        return entity;
    }

    // javadoc is inherited
    public void objectToKey(Object object, TupleOutput output) {

        /* Creates the stored key from the entity.
         */
        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity) object;
        entity.marshalPrimaryKey(output);
    }

    // javadoc is inherited
    public Object objectToData(Object object) {

        /* Returns the entity as the stored data.  There is nothing to do here
         * since the entity's key fields are transient.
         */
        return object;
    }
}

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