| /* |
| * Copyright 2009-2012 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.common.ophelpers; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference; |
| |
| /** |
| * MultiComparator optimized for the special case where there is only a single comparator. |
| * Further speeds up comparisons by always passing 0 as the field's length. |
| */ |
| public class FieldLengthIgnoringSingleComparator extends MultiComparator { |
| private final IBinaryComparator cmp; |
| |
| protected FieldLengthIgnoringSingleComparator(IBinaryComparator[] cmps) { |
| super(cmps); |
| this.cmp = cmps[0]; |
| } |
| |
| public int compare(ITupleReference tupleA, ITupleReference tupleB) { |
| return cmp.compare(tupleA.getFieldData(0), tupleA.getFieldStart(0), 0, tupleB.getFieldData(0), |
| tupleB.getFieldStart(0), 0); |
| } |
| } |