Examples of com.sleepycat.bdb.bind.tuple.MarshalledTupleKeyEntity

com.sleepycat.bdb.bind.tuple.MarshalledTupleKeyEntity
A marshalling interface implemented by entity classes that have tuple data keys. Since MarshalledTupleKeyEntity objects are instantiated by Java serialization, no particular contructor is required.
Note that a marshalled tuple key extractor is somewhat less efficient than a non-marshalled key tuple extractor because more conversions are needed. A marshalled key extractor must convert the data to an object in order to extract the key data, while an unmarshalled key extractor does not.
@author Mark Hayes @see TupleTupleMarshalledBinding @see TupleTupleMarshalledKeyExtractor @see com.sleepycat.bdb.bind.serial.TupleSerialMarshalledBinding @see com.sleepycat.bdb.bind.serial.TupleSerialMarshalledKeyExtractor

        throws IOException {


        // Creates the entity by combining the stored key and value.
        // This "tricky" binding returns the stored value 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;
    }

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


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

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    public void extractIndexKey(TupleInput primaryKeyInput,
                                Object valueInput,
                                TupleOutput indexKeyOutput)
        throws IOException {


        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity)
            binding.dataToObject(primaryKeyInput, valueInput);


        // the primary key is unmarshalled before marshalling the index key, to
        // account for cases where the index key includes data taken from the
        // primary key


        entity.marshalIndexKey(keyName, indexKeyOutput);
    }

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    // javadoc is inherited
    public void clearIndexKey(Object valueInput)
        throws IOException {


        MarshalledTupleKeyEntity entity = (MarshalledTupleKeyEntity)
            binding.dataToObject(null, valueInput);


        entity.clearIndexKey(keyName);
    }

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Related Classes of com.sleepycat.bdb.bind.tuple.MarshalledTupleKeyEntity

com.sleepycat.bdb.bind.serial.TupleSerialMarshalledBinding

com.sleepycat.bdb.bind.serial.TupleSerialMarshalledKeyExtractor

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