TupleTupleMarshalledKeyCreator.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: TupleTupleMarshalledKeyCreator.java,v 12.1 2005/01/31 19:27:32 mark Exp $
 */

package com.sleepycat.bind.tuple;

public class TupleTupleMarshalledKeyCreator extends TupleTupleKeyCreator {

    private String keyName;
    private TupleTupleMarshalledBinding binding;

    public TupleTupleMarshalledKeyCreator(TupleTupleMarshalledBinding binding,
                                          String keyName) {

        this.binding = binding;
        this.keyName = keyName;
    }

    // javadoc is inherited
    public boolean createSecondaryKey(TupleInput primaryKeyInput,
                                      TupleInput dataInput,
                                      TupleOutput indexKeyOutput) {

        /* The primary key is unmarshalled before marshalling the index key, to
         * account for cases where the index key includes fields taken from the
         * primary key.
         */
        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity)
            binding.entryToObject(primaryKeyInput, dataInput);

        return entity.marshalSecondaryKey(keyName, indexKeyOutput);
    }

    // javadoc is inherited
    public boolean nullifyForeignKey(TupleInput dataInput,
                                     TupleOutput dataOutput) {

        // XXX null primary key input below may be unexpected by the binding
        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity)
            binding.entryToObject(null, dataInput);
        if (entity.nullifyForeignKey(keyName)) {
            binding.objectToData(entity, dataOutput);
            return true;
        } else {
            return false;
        }
    }
}

---