| /* |
| * Copyright 2009-2013 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.dataflow.common.comm.util; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor; |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| |
| public class FrameUtils { |
| public static void copy(ByteBuffer srcFrame, ByteBuffer destFrame) { |
| makeReadable(srcFrame); |
| destFrame.clear(); |
| destFrame.put(srcFrame); |
| } |
| |
| public static void makeReadable(ByteBuffer frame) { |
| frame.position(0); |
| frame.limit(frame.capacity()); |
| } |
| |
| public static void flushFrame(ByteBuffer buffer, IFrameWriter writer) throws HyracksDataException { |
| buffer.position(0); |
| buffer.limit(buffer.capacity()); |
| writer.nextFrame(buffer); |
| buffer.position(0); |
| buffer.limit(buffer.capacity()); |
| } |
| |
| public static int getAbsoluteFieldStartOffset(IFrameTupleAccessor accessor, int tuple, int field) { |
| return accessor.getTupleStartOffset(tuple) + accessor.getFieldSlotsLength() |
| + accessor.getFieldStartOffset(tuple, field); |
| } |
| } |