| /* |
| * Copyright 2009-2013 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.hivesterix.runtime.factory.comparator;
|
|
|
| import org.apache.hadoop.io.Text;
|
|
|
| import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
|
| import edu.uci.ics.hivesterix.serde.lazy.LazyUtils.VInt;
|
| import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
|
| import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
|
|
|
| public class HiveStringBinaryAscComparatorFactory implements IBinaryComparatorFactory {
|
| private static final long serialVersionUID = 1L;
|
|
|
| public static HiveStringBinaryAscComparatorFactory INSTANCE = new HiveStringBinaryAscComparatorFactory();
|
|
|
| private HiveStringBinaryAscComparatorFactory() {
|
| }
|
|
|
| @Override
|
| public IBinaryComparator createBinaryComparator() {
|
| return new IBinaryComparator() {
|
| private VInt leftLen = new VInt();
|
| private VInt rightLen = new VInt();
|
|
|
| @Override
|
| public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
|
| LazyUtils.readVInt(b1, s1, leftLen);
|
| LazyUtils.readVInt(b2, s2, rightLen);
|
|
|
| if (leftLen.value + leftLen.length != l1 || rightLen.value + rightLen.length != l2)
|
| throw new IllegalStateException("parse string: length mismatch, expected "
|
| + (leftLen.value + leftLen.length) + ", " + (rightLen.value + rightLen.length)
|
| + " but get " + l1 + ", " + l2);
|
|
|
| return Text.Comparator.compareBytes(b1, s1 + leftLen.length, l1 - leftLen.length, b2, s2
|
| + rightLen.length, l2 - rightLen.length);
|
| }
|
| };
|
| }
|
|
|
| }
|