| /* |
| * 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.tuples; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits; |
| import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference; |
| import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleWriter; |
| |
| public class RTreeTypeAwareTupleWriter extends TypeAwareTupleWriter { |
| |
| public RTreeTypeAwareTupleWriter(ITypeTraits[] typeTraits) { |
| super(typeTraits); |
| } |
| |
| public int writeTupleFields(ITreeIndexTupleReference[] refs, int startField, ByteBuffer targetBuf, int targetOff) { |
| int runner = targetOff; |
| int nullFlagsBytes = getNullFlagsBytes(refs.length); |
| // write null indicator bits |
| for (int i = 0; i < nullFlagsBytes; i++) { |
| targetBuf.put(runner++, (byte) 0); |
| } |
| |
| // write field slots for variable length fields |
| // since the r-tree has fixed length keys, we don't actually need this? |
| encDec.reset(targetBuf.array(), runner); |
| for (int i = startField; i < startField + refs.length; i++) { |
| if (!typeTraits[i].isFixedLength()) { |
| encDec.encode(refs[i].getFieldLength(i)); |
| } |
| } |
| runner = encDec.getPos(); |
| |
| // write data |
| for (int i = 0; i < refs.length; i++) { |
| System.arraycopy(refs[i].getFieldData(i), refs[i].getFieldStart(i), targetBuf.array(), runner, |
| refs[i].getFieldLength(i)); |
| runner += refs[i].getFieldLength(i); |
| } |
| return runner - targetOff; |
| |
| } |
| } |