/*
 * Copyright 2009-2010 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.tests.am.btree;

import java.io.DataOutput;

import org.junit.Before;
import org.junit.Test;

import edu.uci.ics.hyracks.api.constraints.PartitionConstraintHelper;
import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
import edu.uci.ics.hyracks.api.job.JobSpecification;
import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;
import edu.uci.ics.hyracks.dataflow.common.data.marshalling.UTF8StringSerializerDeserializer;
import edu.uci.ics.hyracks.dataflow.std.connectors.OneToOneConnectorDescriptor;
import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
import edu.uci.ics.hyracks.dataflow.std.file.PlainFileWriterOperatorDescriptor;
import edu.uci.ics.hyracks.dataflow.std.misc.ConstantTupleSourceOperatorDescriptor;
import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexDataflowHelperFactory;
import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallbackFactory;

public class BTreePrimaryIndexSearchOperatorTest extends AbstractBTreeOperatorTest {

    @Before
    public void setup() throws Exception {
        super.setup();
        createPrimaryIndex();
        loadPrimaryIndex();
    }

    @Test
    public void searchPrimaryIndexTest() throws Exception {
        JobSpecification spec = new JobSpecification();

        // build tuple containing low and high search key
        // high key and low key
        ArrayTupleBuilder tb = new ArrayTupleBuilder(primaryKeyFieldCount * 2);
        DataOutput dos = tb.getDataOutput();

        tb.reset();
        // low key
        UTF8StringSerializerDeserializer.INSTANCE.serialize("100", dos);
        tb.addFieldEndOffset();
        // high key
        UTF8StringSerializerDeserializer.INSTANCE.serialize("200", dos);
        tb.addFieldEndOffset();

        ISerializerDeserializer[] keyRecDescSers = { UTF8StringSerializerDeserializer.INSTANCE,
                UTF8StringSerializerDeserializer.INSTANCE };
        RecordDescriptor keyRecDesc = new RecordDescriptor(keyRecDescSers);

        ConstantTupleSourceOperatorDescriptor keyProviderOp = new ConstantTupleSourceOperatorDescriptor(spec,
                keyRecDesc, tb.getFieldEndOffsets(), tb.getByteArray(), tb.getSize());
        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, keyProviderOp, NC1_ID);

        int[] lowKeyFields = { 0 };
        int[] highKeyFields = { 1 };

        BTreeSearchOperatorDescriptor primaryBtreeSearchOp = new BTreeSearchOperatorDescriptor(spec, primaryRecDesc,
                storageManager, lcManagerProvider, primarySplitProvider, primaryTypeTraits, primaryComparatorFactories,
                lowKeyFields, highKeyFields, true, true, dataflowHelperFactory, false,
                NoOpOperationCallbackFactory.INSTANCE);
        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, primaryBtreeSearchOp, NC1_ID);

        IFileSplitProvider outSplits = new ConstantFileSplitProvider(new FileSplit[] { new FileSplit(NC1_ID,
                createTempFile().getAbsolutePath()) });
        IOperatorDescriptor printer = new PlainFileWriterOperatorDescriptor(spec, outSplits, ",");
        PartitionConstraintHelper.addAbsoluteLocationConstraint(spec, printer, NC1_ID);

        spec.connect(new OneToOneConnectorDescriptor(spec), keyProviderOp, 0, primaryBtreeSearchOp, 0);
        spec.connect(new OneToOneConnectorDescriptor(spec), primaryBtreeSearchOp, 0, printer, 0);

        spec.addRoot(printer);
        runTest(spec);
    }

    @Override
    protected IIndexDataflowHelperFactory createDataFlowHelperFactory() {
        return ((BTreeOperatorTestHelper) testHelper).createDataFlowHelperFactory();
    }

    @Override
    public void cleanup() throws Exception {
        destroyPrimaryIndex();
    }
}