| package org.apache.lucene.codecs.simpletext; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 at |
| * |
| * 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. |
| */ |
| |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.codecs.FieldsConsumer; |
| import org.apache.lucene.codecs.PostingsConsumer; |
| import org.apache.lucene.codecs.TermStats; |
| import org.apache.lucene.codecs.TermsConsumer; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.FieldInfo.IndexOptions; |
| import org.apache.lucene.index.SegmentWriteState; |
| import org.apache.lucene.search.similarities.Similarity; |
| import org.apache.lucene.store.IndexOutput; |
| |
| import java.io.IOException; |
| import java.util.Comparator; |
| |
| class SimpleTextFieldsWriter extends FieldsConsumer { |
| |
| private final IndexOutput out; |
| private final BytesRef scratch = new BytesRef(10); |
| |
| final static BytesRef END = new BytesRef("END"); |
| final static BytesRef FIELD = new BytesRef("field "); |
| final static BytesRef TERM = new BytesRef(" term "); |
| final static BytesRef DOC = new BytesRef(" doc "); |
| final static BytesRef FREQ = new BytesRef(" freq "); |
| final static BytesRef POS = new BytesRef(" pos "); |
| final static BytesRef START_OFFSET = new BytesRef(" startOffset "); |
| final static BytesRef END_OFFSET = new BytesRef(" endOffset "); |
| final static BytesRef PAYLOAD = new BytesRef(" payload "); |
| |
| public SimpleTextFieldsWriter(SegmentWriteState state) throws IOException { |
| final String fileName = SimpleTextPostingsFormat.getPostingsFileName(state.segmentInfo.name, state.segmentSuffix); |
| out = state.directory.createOutput(fileName, state.context); |
| } |
| |
| private void write(String s) throws IOException { |
| SimpleTextUtil.write(out, s, scratch); |
| } |
| |
| private void write(BytesRef b) throws IOException { |
| SimpleTextUtil.write(out, b); |
| } |
| |
| private void newline() throws IOException { |
| SimpleTextUtil.writeNewline(out); |
| } |
| |
| @Override |
| public TermsConsumer addField(FieldInfo field, Similarity sim) throws IOException { |
| write(FIELD); |
| write(field.name); |
| newline(); |
| return new SimpleTextTermsWriter(field); |
| } |
| |
| private class SimpleTextTermsWriter extends TermsConsumer { |
| private final SimpleTextPostingsWriter postingsWriter; |
| |
| public SimpleTextTermsWriter(FieldInfo field) { |
| postingsWriter = new SimpleTextPostingsWriter(field); |
| } |
| |
| @Override |
| public PostingsConsumer startTerm(BytesRef term) throws IOException { |
| return postingsWriter.reset(term); |
| } |
| |
| @Override |
| public void finishTerm(BytesRef term, TermStats stats) throws IOException { |
| } |
| |
| @Override |
| public void finish(long sumTotalTermFreq, long sumDocFreq, int docCount) throws IOException { |
| } |
| |
| @Override |
| public Comparator<BytesRef> getComparator() { |
| return BytesRef.getUTF8SortedAsUnicodeComparator(); |
| } |
| } |
| |
| private class SimpleTextPostingsWriter extends PostingsConsumer { |
| private BytesRef term; |
| private boolean wroteTerm; |
| private final IndexOptions indexOptions; |
| private final boolean writePositions; |
| private final boolean writeOffsets; |
| |
| // for assert: |
| private int lastStartOffset = 0; |
| |
| public SimpleTextPostingsWriter(FieldInfo field) { |
| this.indexOptions = field.getIndexOptions(); |
| writePositions = indexOptions.compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0; |
| writeOffsets = indexOptions.compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS) >= 0; |
| //System.out.println("writeOffsets=" + writeOffsets); |
| //System.out.println("writePos=" + writePositions); |
| } |
| |
| @Override |
| public void startDoc(int docID, int termDocFreq) throws IOException { |
| if (!wroteTerm) { |
| // we lazily do this, in case the term had zero docs |
| write(TERM); |
| write(term); |
| newline(); |
| wroteTerm = true; |
| } |
| |
| write(DOC); |
| write(Integer.toString(docID)); |
| newline(); |
| if (indexOptions != IndexOptions.DOCS_ONLY) { |
| write(FREQ); |
| write(Integer.toString(termDocFreq)); |
| newline(); |
| } |
| |
| lastStartOffset = 0; |
| } |
| |
| public PostingsConsumer reset(BytesRef term) { |
| this.term = term; |
| wroteTerm = false; |
| return this; |
| } |
| |
| @Override |
| public void addPosition(int position, BytesRef payload, int startOffset, int endOffset) throws IOException { |
| if (writePositions) { |
| write(POS); |
| write(Integer.toString(position)); |
| newline(); |
| } |
| |
| if (writeOffsets) { |
| assert endOffset >= startOffset; |
| assert startOffset >= lastStartOffset: "startOffset=" + startOffset + " lastStartOffset=" + lastStartOffset; |
| lastStartOffset = startOffset; |
| write(START_OFFSET); |
| write(Integer.toString(startOffset)); |
| newline(); |
| write(END_OFFSET); |
| write(Integer.toString(endOffset)); |
| newline(); |
| } |
| |
| if (payload != null && payload.length > 0) { |
| assert payload.length != 0; |
| write(PAYLOAD); |
| write(payload); |
| newline(); |
| } |
| } |
| |
| @Override |
| public void finishDoc() { |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| write(END); |
| newline(); |
| } finally { |
| out.close(); |
| } |
| } |
| } |