hyracks/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMInteriorFrameFactory.java

/*
 * 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.storage.am.rtree.frames;

import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexFrameFactory;
import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleWriterFactory;
import edu.uci.ics.hyracks.storage.am.rtree.api.IRTreeInteriorFrame;

public class RTreeNSMInteriorFrameFactory implements ITreeIndexFrameFactory {

    private static final long serialVersionUID = 1L;
    private final ITreeIndexTupleWriterFactory tupleWriterFactory;
    private final IPrimitiveValueProviderFactory[] keyValueProviderFactories;
    private final RTreePolicyType rtreePolicyType;

    public RTreeNSMInteriorFrameFactory(ITreeIndexTupleWriterFactory tupleWriterFactory,
            IPrimitiveValueProviderFactory[] keyValueProviderFactories, RTreePolicyType rtreePolicyType) {
        this.tupleWriterFactory = tupleWriterFactory;
        if (keyValueProviderFactories.length % 2 != 0) {
            throw new IllegalArgumentException("The key has different number of dimensions.");
        }
        this.keyValueProviderFactories = keyValueProviderFactories;
        this.rtreePolicyType = rtreePolicyType;
    }

    @Override
    public IRTreeInteriorFrame createFrame() {
        IPrimitiveValueProvider[] keyValueProviders = new IPrimitiveValueProvider[keyValueProviderFactories.length];
        for (int i = 0; i < keyValueProviders.length; i++) {
            keyValueProviders[i] = keyValueProviderFactories[i].createPrimitiveValueProvider();
        }
        return new RTreeNSMInteriorFrame(tupleWriterFactory.createTupleWriter(), keyValueProviders, rtreePolicyType);
    }

    @Override
    public ITreeIndexTupleWriterFactory getTupleWriterFactory() {
        return tupleWriterFactory;
    }
}