| /* |
| * 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.lsm.invertedindex.dataflow; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.data.std.util.GrowableArray; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender; |
| import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable; |
| import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IBinaryTokenizer; |
| import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.tokenizers.IToken; |
| |
| public class BinaryTokenizerOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable { |
| |
| private final IHyracksTaskContext ctx; |
| private final IBinaryTokenizer tokenizer; |
| private final int docField; |
| private final int[] keyFields; |
| private final boolean addNumTokensKey; |
| private final RecordDescriptor inputRecDesc; |
| private final RecordDescriptor outputRecDesc; |
| |
| private FrameTupleAccessor accessor; |
| private ArrayTupleBuilder builder; |
| private GrowableArray builderData; |
| private FrameTupleAppender appender; |
| private ByteBuffer writeBuffer; |
| |
| public BinaryTokenizerOperatorNodePushable(IHyracksTaskContext ctx, RecordDescriptor inputRecDesc, |
| RecordDescriptor outputRecDesc, IBinaryTokenizer tokenizer, int docField, int[] keyFields, |
| boolean addNumTokensKey) { |
| this.ctx = ctx; |
| this.tokenizer = tokenizer; |
| this.docField = docField; |
| this.keyFields = keyFields; |
| this.addNumTokensKey = addNumTokensKey; |
| this.inputRecDesc = inputRecDesc; |
| this.outputRecDesc = outputRecDesc; |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| accessor = new FrameTupleAccessor(ctx.getFrameSize(), inputRecDesc); |
| writeBuffer = ctx.allocateFrame(); |
| builder = new ArrayTupleBuilder(outputRecDesc.getFieldCount()); |
| builderData = builder.getFieldData(); |
| appender = new FrameTupleAppender(ctx.getFrameSize()); |
| appender.reset(writeBuffer, true); |
| writer.open(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| accessor.reset(buffer); |
| int tupleCount = accessor.getTupleCount(); |
| for (int i = 0; i < tupleCount; i++) { |
| short numTokens = 0; |
| if (addNumTokensKey) { |
| // Run through the tokens to get the total number of tokens. |
| tokenizer.reset( |
| accessor.getBuffer().array(), |
| accessor.getTupleStartOffset(i) + accessor.getFieldSlotsLength() |
| + accessor.getFieldStartOffset(i, docField), accessor.getFieldLength(i, docField)); |
| while (tokenizer.hasNext()) { |
| tokenizer.next(); |
| numTokens++; |
| } |
| } |
| |
| tokenizer.reset( |
| accessor.getBuffer().array(), |
| accessor.getTupleStartOffset(i) + accessor.getFieldSlotsLength() |
| + accessor.getFieldStartOffset(i, docField), accessor.getFieldLength(i, docField)); |
| while (tokenizer.hasNext()) { |
| tokenizer.next(); |
| |
| builder.reset(); |
| try { |
| IToken token = tokenizer.getToken(); |
| token.serializeToken(builderData); |
| builder.addFieldEndOffset(); |
| // Add number of tokens if requested. |
| if (addNumTokensKey) { |
| builder.getDataOutput().writeShort(numTokens); |
| builder.addFieldEndOffset(); |
| } |
| } catch (IOException e) { |
| throw new HyracksDataException(e.getMessage()); |
| } |
| |
| for (int k = 0; k < keyFields.length; k++) { |
| builder.addField(accessor, i, keyFields[k]); |
| } |
| |
| if (!appender.append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) { |
| FrameUtils.flushFrame(writeBuffer, writer); |
| appender.reset(writeBuffer, true); |
| if (!appender.append(builder.getFieldEndOffsets(), builder.getByteArray(), 0, builder.getSize())) { |
| throw new IllegalStateException(); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| if (appender.getTupleCount() > 0) { |
| FrameUtils.flushFrame(writeBuffer, writer); |
| } |
| writer.close(); |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| writer.fail(); |
| } |
| } |