| /* |
| * 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.tuples; |
| |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference; |
| |
| public class PermutingTupleReference implements ITupleReference { |
| |
| private final int[] fieldPermutation; |
| private ITupleReference sourceTuple; |
| |
| public PermutingTupleReference(int[] fieldPermutation) { |
| this.fieldPermutation = fieldPermutation; |
| } |
| |
| public void reset(ITupleReference sourceTuple) { |
| this.sourceTuple = sourceTuple; |
| } |
| |
| @Override |
| public int getFieldCount() { |
| return fieldPermutation.length; |
| } |
| |
| @Override |
| public byte[] getFieldData(int fIdx) { |
| return sourceTuple.getFieldData(fieldPermutation[fIdx]); |
| } |
| |
| @Override |
| public int getFieldStart(int fIdx) { |
| return sourceTuple.getFieldStart(fieldPermutation[fIdx]); |
| } |
| |
| @Override |
| public int getFieldLength(int fIdx) { |
| return sourceTuple.getFieldLength(fieldPermutation[fIdx]); |
| } |
| } |