| /* |
| * 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.invertedindex.impls; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ITupleReference; |
| |
| public class FixedSizeTupleReference implements ITupleReference { |
| |
| private final ITypeTraits[] typeTraits; |
| private final int[] fieldStartOffsets; |
| private byte[] data; |
| private int startOff; |
| |
| public FixedSizeTupleReference(ITypeTraits[] typeTraits) { |
| this.typeTraits = typeTraits; |
| this.fieldStartOffsets = new int[typeTraits.length]; |
| this.fieldStartOffsets[0] = 0; |
| for (int i = 1; i < typeTraits.length; i++) { |
| fieldStartOffsets[i] = fieldStartOffsets[i - 1] + typeTraits[i - 1].getFixedLength(); |
| } |
| } |
| |
| public void reset(byte[] data, int startOff) { |
| this.data = data; |
| this.startOff = startOff; |
| } |
| |
| @Override |
| public int getFieldCount() { |
| return typeTraits.length; |
| } |
| |
| @Override |
| public byte[] getFieldData(int fIdx) { |
| return data; |
| } |
| |
| @Override |
| public int getFieldLength(int fIdx) { |
| return typeTraits[fIdx].getFixedLength(); |
| } |
| |
| @Override |
| public int getFieldStart(int fIdx) { |
| return startOff + fieldStartOffsets[fIdx]; |
| } |
| } |