| /* |
| * 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.impls; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.storage.am.common.api.ISplitKey; |
| import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference; |
| |
| public class RTreeSplitKey implements ISplitKey { |
| public byte[] leftPageData = null; |
| public ByteBuffer leftPageBuf = null; |
| public ITreeIndexTupleReference leftTuple; |
| |
| public byte[] rightPageData = null; |
| public ByteBuffer rightPageBuf = null; |
| public ITreeIndexTupleReference rightTuple; |
| |
| public int keySize = 0; |
| |
| public RTreeSplitKey(ITreeIndexTupleReference leftTuple, |
| ITreeIndexTupleReference rightTuple) { |
| this.leftTuple = leftTuple; |
| this.rightTuple = rightTuple; |
| } |
| |
| public void initData(int keySize) { |
| // try to reuse existing memory from a lower-level split if possible |
| this.keySize = keySize; |
| if (leftPageData != null) { |
| if (leftPageData.length < keySize + 4) { |
| leftPageData = new byte[keySize + 4]; // add 4 for the page |
| leftPageBuf = ByteBuffer.wrap(leftPageData); |
| } |
| } else { |
| leftPageData = new byte[keySize + 4]; // add 4 for the page |
| leftPageBuf = ByteBuffer.wrap(leftPageData); |
| } |
| if (rightPageData != null) { |
| if (rightPageData.length < keySize + 4) { |
| rightPageData = new byte[keySize + 4]; // add 4 for the page |
| rightPageBuf = ByteBuffer.wrap(rightPageData); |
| } |
| } else { |
| rightPageData = new byte[keySize + 4]; // add 4 for the page |
| rightPageBuf = ByteBuffer.wrap(rightPageData); |
| } |
| |
| leftTuple.resetByTupleOffset(leftPageBuf, 0); |
| rightTuple.resetByTupleOffset(rightPageBuf, 0); |
| } |
| |
| public void resetLeftPage() { |
| leftPageData = null; |
| leftPageBuf = null; |
| } |
| |
| public void resetRightPage() { |
| rightPageData = null; |
| rightPageBuf = null; |
| } |
| |
| public ByteBuffer getLeftPageBuffer() { |
| return leftPageBuf; |
| } |
| |
| public ByteBuffer getRightPageBuffer() { |
| return rightPageBuf; |
| } |
| |
| public ITreeIndexTupleReference getLeftTuple() { |
| return leftTuple; |
| } |
| |
| public ITreeIndexTupleReference getRightTuple() { |
| return rightTuple; |
| } |
| |
| public int getLeftPage() { |
| return leftPageBuf.getInt(keySize); |
| } |
| |
| public int getRightPage() { |
| return rightPageBuf.getInt(keySize); |
| } |
| |
| public void setLeftPage(int page) { |
| leftPageBuf.putInt(keySize, page); |
| } |
| |
| public void setRightPage(int page) { |
| rightPageBuf.putInt(keySize, page); |
| } |
| |
| public ISplitKey duplicate(ITreeIndexTupleReference copyLeftTuple, |
| ITreeIndexTupleReference copyRightTuple) { |
| RTreeSplitKey copy = new RTreeSplitKey(copyLeftTuple, copyRightTuple); |
| copy.leftPageData = leftPageData.clone(); |
| copy.leftPageBuf = ByteBuffer.wrap(copy.leftPageData); |
| copy.leftTuple.setFieldCount(leftTuple.getFieldCount()); |
| copy.leftTuple.resetByTupleOffset(copy.leftPageBuf, 0); |
| |
| copy.rightPageData = rightPageData.clone(); |
| copy.rightPageBuf = ByteBuffer.wrap(copy.rightPageData); |
| copy.rightTuple.setFieldCount(rightTuple.getFieldCount()); |
| copy.rightTuple.resetByTupleOffset(copy.rightPageBuf, 0); |
| return copy; |
| } |
| |
| @Override |
| public void reset() { |
| leftPageData = null; |
| leftPageBuf = null; |
| rightPageData = null; |
| rightPageBuf = null; |
| } |
| |
| @Override |
| public ByteBuffer getBuffer() { |
| // TODO Auto-generated method stub |
| return null; |
| } |
| |
| @Override |
| public ITreeIndexTupleReference getTuple() { |
| // TODO Auto-generated method stub |
| return null; |
| } |
| |
| @Override |
| public void setPages(int leftPage, int rightPage) { |
| leftPageBuf.putInt(keySize, leftPage); |
| rightPageBuf.putInt(keySize, rightPage); |
| } |
| |
| @Override |
| public ISplitKey duplicate(ITreeIndexTupleReference copyTuple) { |
| // TODO Auto-generated method stub |
| return null; |
| } |
| } |