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

com.sleepycat.bdb.bind.tuple.TupleTupleMarshalledKeyExtractor

A concrete key extractor that works in conjunction with a {@link TupleTupleMarshalledBinding}. This key extractor works by calling the methods of the {@link MarshalledTupleKeyEntity} interface to extract andclear the index key data.

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


        TupleTupleMarshalledBinding binding =
            new TupleTupleMarshalledBinding(keyFormat, format,
                                            MarshalledObject.class);
        KeyExtractor extractor =
            new TupleTupleMarshalledKeyExtractor(binding, indexKeyFormat, "1",
                                                 false, true);
        assertSame(format, extractor.getValueFormat());
        assertNull(extractor.getPrimaryKeyFormat());
        assertSame(indexKeyFormat, extractor.getIndexKeyFormat());


        MarshalledObject val = new MarshalledObject("abc", "primary",
                                                    "index1", "index2");
        binding.objectToValue(val, buffer);
        binding.objectToKey(val, keyBuffer);


        extractor.extractIndexKey(keyBuffer, buffer, indexKeyBuffer);
        TupleInput in = indexKeyFormat.dataToInput(indexKeyBuffer);
        assertEquals("index1", in.readString());


        extractor.clearIndexKey(buffer);
        extractor.extractIndexKey(keyBuffer, buffer, indexKeyBuffer);
        assertEquals(0, indexKeyBuffer.getDataLength());
    }

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

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