| /* |
| * 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. |
| */ |
| package org.apache.lucene.codecs.memory; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.lucene.codecs.FieldsConsumer; |
| import org.apache.lucene.codecs.FieldsProducer; |
| import org.apache.lucene.codecs.PostingsFormat; |
| import org.apache.lucene.codecs.lucene84.Lucene84PostingsFormat; |
| import org.apache.lucene.index.BaseTermsEnum; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.Fields; |
| import org.apache.lucene.index.ImpactsEnum; |
| import org.apache.lucene.index.IndexOptions; |
| import org.apache.lucene.index.OrdTermState; |
| import org.apache.lucene.index.PostingsEnum; |
| import org.apache.lucene.index.SegmentReadState; |
| import org.apache.lucene.index.SegmentWriteState; |
| import org.apache.lucene.index.SlowImpactsEnum; |
| import org.apache.lucene.index.TermState; |
| import org.apache.lucene.index.Terms; |
| import org.apache.lucene.index.TermsEnum; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.RAMOutputStream; |
| import org.apache.lucene.util.Accountable; |
| import org.apache.lucene.util.Accountables; |
| import org.apache.lucene.util.ArrayUtil; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.RamUsageEstimator; |
| import org.apache.lucene.util.automaton.CompiledAutomaton; |
| import org.apache.lucene.util.automaton.RunAutomaton; |
| import org.apache.lucene.util.automaton.Transition; |
| |
| // TODO: |
| // - build depth-N prefix hash? |
| // - or: longer dense skip lists than just next byte? |
| |
| /** Wraps {@link Lucene84PostingsFormat} format for on-disk |
| * storage, but then at read time loads and stores all |
| * terms and postings directly in RAM as byte[], int[]. |
| * |
| * <p><b>WARNING</b>: This is |
| * exceptionally RAM intensive: it makes no effort to |
| * compress the postings data, storing terms as separate |
| * byte[] and postings as separate int[], but as a result it |
| * gives substantial increase in search performance. |
| * |
| * <p>This postings format supports {@link TermsEnum#ord} |
| * and {@link TermsEnum#seekExact(long)}. |
| |
| * <p>Because this holds all term bytes as a single |
| * byte[], you cannot have more than 2.1GB worth of term |
| * bytes in a single segment. |
| * |
| * @lucene.experimental */ |
| |
| public final class DirectPostingsFormat extends PostingsFormat { |
| |
| private final int minSkipCount; |
| private final int lowFreqCutoff; |
| |
| private final static int DEFAULT_MIN_SKIP_COUNT = 8; |
| private final static int DEFAULT_LOW_FREQ_CUTOFF = 32; |
| |
| //private static final boolean DEBUG = true; |
| |
| // TODO: allow passing/wrapping arbitrary postings format? |
| |
| public DirectPostingsFormat() { |
| this(DEFAULT_MIN_SKIP_COUNT, DEFAULT_LOW_FREQ_CUTOFF); |
| } |
| |
| /** minSkipCount is how many terms in a row must have the |
| * same prefix before we put a skip pointer down. Terms |
| * with docFreq <= lowFreqCutoff will use a single int[] |
| * to hold all docs, freqs, position and offsets; terms |
| * with higher docFreq will use separate arrays. */ |
| public DirectPostingsFormat(int minSkipCount, int lowFreqCutoff) { |
| super("Direct"); |
| this.minSkipCount = minSkipCount; |
| this.lowFreqCutoff = lowFreqCutoff; |
| } |
| |
| @Override |
| public FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException { |
| return PostingsFormat.forName("Lucene84").fieldsConsumer(state); |
| } |
| |
| @Override |
| public FieldsProducer fieldsProducer(SegmentReadState state) throws IOException { |
| FieldsProducer postings = PostingsFormat.forName("Lucene84").fieldsProducer(state); |
| if (state.context.context != IOContext.Context.MERGE) { |
| FieldsProducer loadedPostings; |
| try { |
| postings.checkIntegrity(); |
| loadedPostings = new DirectFields(state, postings, minSkipCount, lowFreqCutoff); |
| } finally { |
| postings.close(); |
| } |
| return loadedPostings; |
| } else { |
| // Don't load postings for merge: |
| return postings; |
| } |
| } |
| |
| private static final class DirectFields extends FieldsProducer { |
| private final Map<String,DirectField> fields = new TreeMap<>(); |
| |
| public DirectFields(SegmentReadState state, Fields fields, int minSkipCount, int lowFreqCutoff) throws IOException { |
| for (String field : fields) { |
| this.fields.put(field, new DirectField(state, field, fields.terms(field), minSkipCount, lowFreqCutoff)); |
| } |
| } |
| |
| @Override |
| public Iterator<String> iterator() { |
| return Collections.unmodifiableSet(fields.keySet()).iterator(); |
| } |
| |
| @Override |
| public Terms terms(String field) { |
| return fields.get(field); |
| } |
| |
| @Override |
| public int size() { |
| return fields.size(); |
| } |
| |
| @Override |
| public void close() { |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| long sizeInBytes = 0; |
| for(Map.Entry<String,DirectField> entry: fields.entrySet()) { |
| sizeInBytes += entry.getKey().length() * Character.BYTES; |
| sizeInBytes += entry.getValue().ramBytesUsed(); |
| } |
| return sizeInBytes; |
| } |
| |
| @Override |
| public Collection<Accountable> getChildResources() { |
| return Accountables.namedAccountables("field", fields); |
| } |
| |
| @Override |
| public void checkIntegrity() throws IOException { |
| // if we read entirely into ram, we already validated. |
| // otherwise returned the raw postings reader |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "(fields=" + fields.size() + ")"; |
| } |
| } |
| |
| private final static class DirectField extends Terms implements Accountable { |
| |
| private static final long BASE_RAM_BYTES_USED = RamUsageEstimator.shallowSizeOfInstance(DirectField.class); |
| |
| private static abstract class TermAndSkip implements Accountable { |
| public int[] skips; |
| } |
| |
| private static final class LowFreqTerm extends TermAndSkip { |
| |
| private static final long BASE_RAM_BYTES_USED = RamUsageEstimator.shallowSizeOfInstance(HighFreqTerm.class); |
| |
| public final int[] postings; |
| public final byte[] payloads; |
| public final int docFreq; |
| public final int totalTermFreq; |
| |
| public LowFreqTerm(int[] postings, byte[] payloads, int docFreq, int totalTermFreq) { |
| this.postings = postings; |
| this.payloads = payloads; |
| this.docFreq = docFreq; |
| this.totalTermFreq = totalTermFreq; |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| return BASE_RAM_BYTES_USED + |
| ((postings!=null) ? RamUsageEstimator.sizeOf(postings) : 0) + |
| ((payloads!=null) ? RamUsageEstimator.sizeOf(payloads) : 0); |
| } |
| |
| } |
| |
| // TODO: maybe specialize into prx/no-prx/no-frq cases? |
| private static final class HighFreqTerm extends TermAndSkip { |
| |
| private static final long BASE_RAM_BYTES_USED = RamUsageEstimator.shallowSizeOfInstance(HighFreqTerm.class); |
| |
| public final long totalTermFreq; |
| public final int[] docIDs; |
| public final int[] freqs; |
| public final int[][] positions; |
| public final byte[][][] payloads; |
| |
| public HighFreqTerm(int[] docIDs, int[] freqs, int[][] positions, byte[][][] payloads, long totalTermFreq) { |
| this.docIDs = docIDs; |
| this.freqs = freqs; |
| this.positions = positions; |
| this.payloads = payloads; |
| this.totalTermFreq = totalTermFreq; |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| long sizeInBytes = BASE_RAM_BYTES_USED; |
| sizeInBytes += (docIDs!=null)? RamUsageEstimator.sizeOf(docIDs) : 0; |
| sizeInBytes += (freqs!=null)? RamUsageEstimator.sizeOf(freqs) : 0; |
| |
| if(positions != null) { |
| sizeInBytes += RamUsageEstimator.shallowSizeOf(positions); |
| for(int[] position : positions) { |
| sizeInBytes += (position!=null) ? RamUsageEstimator.sizeOf(position) : 0; |
| } |
| } |
| |
| if (payloads != null) { |
| sizeInBytes += RamUsageEstimator.shallowSizeOf(payloads); |
| for(byte[][] payload : payloads) { |
| if(payload != null) { |
| sizeInBytes += RamUsageEstimator.shallowSizeOf(payload); |
| for(byte[] pload : payload) { |
| sizeInBytes += (pload!=null) ? RamUsageEstimator.sizeOf(pload) : 0; |
| } |
| } |
| } |
| } |
| |
| return sizeInBytes; |
| } |
| |
| } |
| |
| private final byte[] termBytes; |
| private final int[] termOffsets; |
| |
| private final int[] skips; |
| private final int[] skipOffsets; |
| |
| private final TermAndSkip[] terms; |
| private final boolean hasFreq; |
| private final boolean hasPos; |
| private final boolean hasOffsets; |
| private final boolean hasPayloads; |
| private final long sumTotalTermFreq; |
| private final int docCount; |
| private final long sumDocFreq; |
| private int skipCount; |
| |
| // TODO: maybe make a separate builder? These are only |
| // used during load: |
| private int count; |
| private int[] sameCounts = new int[10]; |
| private final int minSkipCount; |
| |
| private final static class IntArrayWriter { |
| private int[] ints = new int[10]; |
| private int upto; |
| |
| public void add(int value) { |
| if (ints.length == upto) { |
| ints = ArrayUtil.grow(ints); |
| } |
| ints[upto++] = value; |
| } |
| |
| public int[] get() { |
| final int[] arr = new int[upto]; |
| System.arraycopy(ints, 0, arr, 0, upto); |
| upto = 0; |
| return arr; |
| } |
| } |
| |
| public DirectField(SegmentReadState state, String field, Terms termsIn, int minSkipCount, int lowFreqCutoff) throws IOException { |
| final FieldInfo fieldInfo = state.fieldInfos.fieldInfo(field); |
| |
| sumTotalTermFreq = termsIn.getSumTotalTermFreq(); |
| sumDocFreq = termsIn.getSumDocFreq(); |
| docCount = termsIn.getDocCount(); |
| |
| final int numTerms = (int) termsIn.size(); |
| if (numTerms == -1) { |
| throw new IllegalArgumentException("codec does not provide Terms.size()"); |
| } |
| terms = new TermAndSkip[numTerms]; |
| termOffsets = new int[1+numTerms]; |
| |
| byte[] termBytes = new byte[1024]; |
| |
| this.minSkipCount = minSkipCount; |
| |
| hasFreq = fieldInfo.getIndexOptions().compareTo(IndexOptions.DOCS) > 0; |
| hasPos = fieldInfo.getIndexOptions().compareTo(IndexOptions.DOCS_AND_FREQS) > 0; |
| hasOffsets = fieldInfo.getIndexOptions().compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) > 0; |
| hasPayloads = fieldInfo.hasPayloads(); |
| |
| BytesRef term; |
| PostingsEnum postingsEnum = null; |
| PostingsEnum docsAndPositionsEnum = null; |
| final TermsEnum termsEnum = termsIn.iterator(); |
| int termOffset = 0; |
| |
| final IntArrayWriter scratch = new IntArrayWriter(); |
| |
| // Used for payloads, if any: |
| final RAMOutputStream ros = new RAMOutputStream(); |
| |
| // if (DEBUG) { |
| // System.out.println("\nLOAD terms seg=" + state.segmentInfo.name + " field=" + field + " hasOffsets=" + hasOffsets + " hasFreq=" + hasFreq + " hasPos=" + hasPos + " hasPayloads=" + hasPayloads); |
| // } |
| |
| while ((term = termsEnum.next()) != null) { |
| final int docFreq = termsEnum.docFreq(); |
| final long totalTermFreq = termsEnum.totalTermFreq(); |
| |
| // if (DEBUG) { |
| // System.out.println(" term=" + term.utf8ToString()); |
| // } |
| |
| termOffsets[count] = termOffset; |
| |
| if (termBytes.length < (termOffset + term.length)) { |
| termBytes = ArrayUtil.grow(termBytes, termOffset + term.length); |
| } |
| System.arraycopy(term.bytes, term.offset, termBytes, termOffset, term.length); |
| termOffset += term.length; |
| termOffsets[count+1] = termOffset; |
| |
| if (hasPos) { |
| docsAndPositionsEnum = termsEnum.postings(docsAndPositionsEnum, PostingsEnum.ALL); |
| } else { |
| postingsEnum = termsEnum.postings(postingsEnum); |
| } |
| |
| final TermAndSkip ent; |
| |
| final PostingsEnum postingsEnum2; |
| if (hasPos) { |
| postingsEnum2 = docsAndPositionsEnum; |
| } else { |
| postingsEnum2 = postingsEnum; |
| } |
| |
| int docID; |
| |
| if (docFreq <= lowFreqCutoff) { |
| |
| ros.reset(); |
| |
| // Pack postings for low-freq terms into a single int[]: |
| while ((docID = postingsEnum2.nextDoc()) != PostingsEnum.NO_MORE_DOCS) { |
| scratch.add(docID); |
| if (hasFreq) { |
| final int freq = postingsEnum2.freq(); |
| scratch.add(freq); |
| if (hasPos) { |
| for(int pos=0;pos<freq;pos++) { |
| scratch.add(docsAndPositionsEnum.nextPosition()); |
| if (hasOffsets) { |
| scratch.add(docsAndPositionsEnum.startOffset()); |
| scratch.add(docsAndPositionsEnum.endOffset()); |
| } |
| if (hasPayloads) { |
| final BytesRef payload = docsAndPositionsEnum.getPayload(); |
| if (payload != null) { |
| scratch.add(payload.length); |
| ros.writeBytes(payload.bytes, payload.offset, payload.length); |
| } else { |
| scratch.add(0); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| final byte[] payloads; |
| if (hasPayloads) { |
| payloads = new byte[(int) ros.getFilePointer()]; |
| ros.writeTo(payloads, 0); |
| } else { |
| payloads = null; |
| } |
| |
| final int[] postings = scratch.get(); |
| |
| ent = new LowFreqTerm(postings, payloads, docFreq, (int) totalTermFreq); |
| } else { |
| final int[] docs = new int[docFreq]; |
| final int[] freqs; |
| final int[][] positions; |
| final byte[][][] payloads; |
| if (hasFreq) { |
| freqs = new int[docFreq]; |
| if (hasPos) { |
| positions = new int[docFreq][]; |
| if (hasPayloads) { |
| payloads = new byte[docFreq][][]; |
| } else { |
| payloads = null; |
| } |
| } else { |
| positions = null; |
| payloads = null; |
| } |
| } else { |
| freqs = null; |
| positions = null; |
| payloads = null; |
| } |
| |
| // Use separate int[] for the postings for high-freq |
| // terms: |
| int upto = 0; |
| while ((docID = postingsEnum2.nextDoc()) != PostingsEnum.NO_MORE_DOCS) { |
| docs[upto] = docID; |
| if (hasFreq) { |
| final int freq = postingsEnum2.freq(); |
| freqs[upto] = freq; |
| if (hasPos) { |
| final int mult; |
| if (hasOffsets) { |
| mult = 3; |
| } else { |
| mult = 1; |
| } |
| if (hasPayloads) { |
| payloads[upto] = new byte[freq][]; |
| } |
| positions[upto] = new int[mult*freq]; |
| int posUpto = 0; |
| for(int pos=0;pos<freq;pos++) { |
| positions[upto][posUpto] = docsAndPositionsEnum.nextPosition(); |
| if (hasPayloads) { |
| BytesRef payload = docsAndPositionsEnum.getPayload(); |
| if (payload != null) { |
| byte[] payloadBytes = new byte[payload.length]; |
| System.arraycopy(payload.bytes, payload.offset, payloadBytes, 0, payload.length); |
| payloads[upto][pos] = payloadBytes; |
| } |
| } |
| posUpto++; |
| if (hasOffsets) { |
| positions[upto][posUpto++] = docsAndPositionsEnum.startOffset(); |
| positions[upto][posUpto++] = docsAndPositionsEnum.endOffset(); |
| } |
| } |
| } |
| } |
| |
| upto++; |
| } |
| assert upto == docFreq; |
| ent = new HighFreqTerm(docs, freqs, positions, payloads, totalTermFreq); |
| } |
| |
| terms[count] = ent; |
| setSkips(count, termBytes); |
| count++; |
| } |
| |
| // End sentinel: |
| termOffsets[count] = termOffset; |
| |
| finishSkips(); |
| |
| //System.out.println(skipCount + " skips: " + field); |
| |
| this.termBytes = new byte[termOffset]; |
| System.arraycopy(termBytes, 0, this.termBytes, 0, termOffset); |
| |
| // Pack skips: |
| this.skips = new int[skipCount]; |
| this.skipOffsets = new int[1+numTerms]; |
| |
| int skipOffset = 0; |
| for(int i=0;i<numTerms;i++) { |
| final int[] termSkips = terms[i].skips; |
| skipOffsets[i] = skipOffset; |
| if (termSkips != null) { |
| System.arraycopy(termSkips, 0, skips, skipOffset, termSkips.length); |
| skipOffset += termSkips.length; |
| terms[i].skips = null; |
| } |
| } |
| this.skipOffsets[numTerms] = skipOffset; |
| assert skipOffset == skipCount; |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| long sizeInBytes = BASE_RAM_BYTES_USED; |
| sizeInBytes += ((termBytes!=null) ? RamUsageEstimator.sizeOf(termBytes) : 0); |
| sizeInBytes += ((termOffsets!=null) ? RamUsageEstimator.sizeOf(termOffsets) : 0); |
| sizeInBytes += ((skips!=null) ? RamUsageEstimator.sizeOf(skips) : 0); |
| sizeInBytes += ((skipOffsets!=null) ? RamUsageEstimator.sizeOf(skipOffsets) : 0); |
| sizeInBytes += ((sameCounts!=null) ? RamUsageEstimator.sizeOf(sameCounts) : 0); |
| |
| if(terms!=null) { |
| sizeInBytes += RamUsageEstimator.shallowSizeOf(terms); |
| for(TermAndSkip termAndSkip : terms) { |
| sizeInBytes += (termAndSkip!=null) ? termAndSkip.ramBytesUsed() : 0; |
| } |
| } |
| |
| return sizeInBytes; |
| } |
| |
| @Override |
| public String toString() { |
| return "DirectTerms(terms=" + terms.length + ",postings=" + sumDocFreq + ",positions=" + sumTotalTermFreq + ",docs=" + docCount + ")"; |
| } |
| |
| // Compares in unicode (UTF8) order: |
| int compare(int ord, BytesRef other) { |
| final byte[] otherBytes = other.bytes; |
| |
| int upto = termOffsets[ord]; |
| final int termLen = termOffsets[1+ord] - upto; |
| int otherUpto = other.offset; |
| |
| final int stop = upto + Math.min(termLen, other.length); |
| while (upto < stop) { |
| int diff = (termBytes[upto++] & 0xFF) - (otherBytes[otherUpto++] & 0xFF); |
| if (diff != 0) { |
| return diff; |
| } |
| } |
| |
| // One is a prefix of the other, or, they are equal: |
| return termLen - other.length; |
| } |
| |
| private void setSkips(int termOrd, byte[] termBytes) { |
| |
| final int termLength = termOffsets[termOrd+1] - termOffsets[termOrd]; |
| |
| if (sameCounts.length < termLength) { |
| sameCounts = ArrayUtil.grow(sameCounts, termLength); |
| } |
| |
| // Update skip pointers: |
| if (termOrd > 0) { |
| final int lastTermLength = termOffsets[termOrd] - termOffsets[termOrd-1]; |
| final int limit = Math.min(termLength, lastTermLength); |
| |
| int lastTermOffset = termOffsets[termOrd-1]; |
| int termOffset = termOffsets[termOrd]; |
| |
| int i = 0; |
| for(;i<limit;i++) { |
| if (termBytes[lastTermOffset++] == termBytes[termOffset++]) { |
| sameCounts[i]++; |
| } else { |
| for(;i<limit;i++) { |
| if (sameCounts[i] >= minSkipCount) { |
| // Go back and add a skip pointer: |
| saveSkip(termOrd, sameCounts[i]); |
| } |
| sameCounts[i] = 1; |
| } |
| break; |
| } |
| } |
| |
| for(;i<lastTermLength;i++) { |
| if (sameCounts[i] >= minSkipCount) { |
| // Go back and add a skip pointer: |
| saveSkip(termOrd, sameCounts[i]); |
| } |
| sameCounts[i] = 0; |
| } |
| for(int j=limit;j<termLength;j++) { |
| sameCounts[j] = 1; |
| } |
| } else { |
| for(int i=0;i<termLength;i++) { |
| sameCounts[i]++; |
| } |
| } |
| } |
| |
| private void finishSkips() { |
| assert count == terms.length; |
| int lastTermOffset = termOffsets[count-1]; |
| int lastTermLength = termOffsets[count] - lastTermOffset; |
| |
| for(int i=0;i<lastTermLength;i++) { |
| if (sameCounts[i] >= minSkipCount) { |
| // Go back and add a skip pointer: |
| saveSkip(count, sameCounts[i]); |
| } |
| } |
| |
| // Reverse the skip pointers so they are "nested": |
| for(int termID=0;termID<terms.length;termID++) { |
| TermAndSkip term = terms[termID]; |
| if (term.skips != null && term.skips.length > 1) { |
| for(int pos=0;pos<term.skips.length/2;pos++) { |
| final int otherPos = term.skips.length-pos-1; |
| |
| final int temp = term.skips[pos]; |
| term.skips[pos] = term.skips[otherPos]; |
| term.skips[otherPos] = temp; |
| } |
| } |
| } |
| } |
| |
| private void saveSkip(int ord, int backCount) { |
| final TermAndSkip term = terms[ord - backCount]; |
| skipCount++; |
| if (term.skips == null) { |
| term.skips = new int[] {ord}; |
| } else { |
| // Normally we'd grow at a slight exponential... but |
| // given that the skips themselves are already log(N) |
| // we can grow by only 1 and still have amortized |
| // linear time: |
| final int[] newSkips = new int[term.skips.length+1]; |
| System.arraycopy(term.skips, 0, newSkips, 0, term.skips.length); |
| term.skips = newSkips; |
| term.skips[term.skips.length-1] = ord; |
| } |
| } |
| |
| @Override |
| public TermsEnum iterator() { |
| return new DirectTermsEnum(); |
| } |
| |
| @Override |
| public TermsEnum intersect(CompiledAutomaton compiled, final BytesRef startTerm) { |
| if (compiled.type != CompiledAutomaton.AUTOMATON_TYPE.NORMAL) { |
| throw new IllegalArgumentException("please use CompiledAutomaton.getTermsEnum instead"); |
| } |
| return new DirectIntersectTermsEnum(compiled, startTerm); |
| } |
| |
| @Override |
| public long size() { |
| return terms.length; |
| } |
| |
| @Override |
| public long getSumTotalTermFreq() { |
| return sumTotalTermFreq; |
| } |
| |
| @Override |
| public long getSumDocFreq() { |
| return sumDocFreq; |
| } |
| |
| @Override |
| public int getDocCount() { |
| return docCount; |
| } |
| |
| @Override |
| public boolean hasFreqs() { |
| return hasFreq; |
| } |
| |
| @Override |
| public boolean hasOffsets() { |
| return hasOffsets; |
| } |
| |
| @Override |
| public boolean hasPositions() { |
| return hasPos; |
| } |
| |
| @Override |
| public boolean hasPayloads() { |
| return hasPayloads; |
| } |
| |
| private final class DirectTermsEnum extends BaseTermsEnum { |
| |
| private final BytesRef scratch = new BytesRef(); |
| private int termOrd; |
| |
| private DirectTermsEnum() { |
| termOrd = -1; |
| } |
| |
| private BytesRef setTerm() { |
| scratch.bytes = termBytes; |
| scratch.offset = termOffsets[termOrd]; |
| scratch.length = termOffsets[termOrd+1] - termOffsets[termOrd]; |
| return scratch; |
| } |
| |
| @Override |
| public BytesRef next() { |
| termOrd++; |
| if (termOrd < terms.length) { |
| return setTerm(); |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public TermState termState() { |
| OrdTermState state = new OrdTermState(); |
| state.ord = termOrd; |
| return state; |
| } |
| |
| // If non-negative, exact match; else, -ord-1, where ord |
| // is where you would insert the term. |
| private int findTerm(BytesRef term) { |
| |
| // Just do binary search: should be (constant factor) |
| // faster than using the skip list: |
| int low = 0; |
| int high = terms.length-1; |
| |
| while (low <= high) { |
| int mid = (low + high) >>> 1; |
| int cmp = compare(mid, term); |
| if (cmp < 0) { |
| low = mid + 1; |
| } else if (cmp > 0) { |
| high = mid - 1; |
| } else { |
| return mid; // key found |
| } |
| } |
| |
| return -(low + 1); // key not found. |
| } |
| |
| @Override |
| public SeekStatus seekCeil(BytesRef term) { |
| // TODO: we should use the skip pointers; should be |
| // faster than bin search; we should also hold |
| // & reuse current state so seeking forwards is |
| // faster |
| final int ord = findTerm(term); |
| // if (DEBUG) { |
| // System.out.println(" find term=" + term.utf8ToString() + " ord=" + ord); |
| // } |
| if (ord >= 0) { |
| termOrd = ord; |
| setTerm(); |
| return SeekStatus.FOUND; |
| } else if (ord == -terms.length-1) { |
| return SeekStatus.END; |
| } else { |
| termOrd = -ord - 1; |
| setTerm(); |
| return SeekStatus.NOT_FOUND; |
| } |
| } |
| |
| @Override |
| public boolean seekExact(BytesRef term) { |
| // TODO: we should use the skip pointers; should be |
| // faster than bin search; we should also hold |
| // & reuse current state so seeking forwards is |
| // faster |
| final int ord = findTerm(term); |
| if (ord >= 0) { |
| termOrd = ord; |
| setTerm(); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public void seekExact(long ord) { |
| termOrd = (int) ord; |
| setTerm(); |
| } |
| |
| @Override |
| public void seekExact(BytesRef term, TermState state) throws IOException { |
| termOrd = (int) ((OrdTermState) state).ord; |
| setTerm(); |
| assert term.equals(scratch); |
| } |
| |
| @Override |
| public BytesRef term() { |
| return scratch; |
| } |
| |
| @Override |
| public long ord() { |
| return termOrd; |
| } |
| |
| @Override |
| public int docFreq() { |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| return ((LowFreqTerm) terms[termOrd]).docFreq; |
| } else { |
| return ((HighFreqTerm) terms[termOrd]).docIDs.length; |
| } |
| } |
| |
| @Override |
| public long totalTermFreq() { |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| return ((LowFreqTerm) terms[termOrd]).totalTermFreq; |
| } else { |
| return ((HighFreqTerm) terms[termOrd]).totalTermFreq; |
| } |
| } |
| |
| @Override |
| public PostingsEnum postings(PostingsEnum reuse, int flags) throws IOException { |
| // TODO: implement reuse |
| // it's hairy! |
| |
| // TODO: the logic of which enum impl to choose should be refactored to be simpler... |
| if (PostingsEnum.featureRequested(flags, PostingsEnum.POSITIONS)) { |
| |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| final LowFreqTerm term = ((LowFreqTerm) terms[termOrd]); |
| final int[] postings = term.postings; |
| if (hasFreq == false) { |
| LowFreqDocsEnumNoTF docsEnum; |
| if (reuse instanceof LowFreqDocsEnumNoTF) { |
| docsEnum = (LowFreqDocsEnumNoTF) reuse; |
| } else { |
| docsEnum = new LowFreqDocsEnumNoTF(); |
| } |
| |
| return docsEnum.reset(postings); |
| |
| } else if (hasPos == false) { |
| LowFreqDocsEnumNoPos docsEnum; |
| if (reuse instanceof LowFreqDocsEnumNoPos) { |
| docsEnum = (LowFreqDocsEnumNoPos) reuse; |
| } else { |
| docsEnum = new LowFreqDocsEnumNoPos(); |
| } |
| |
| return docsEnum.reset(postings); |
| } |
| final byte[] payloads = term.payloads; |
| return new LowFreqPostingsEnum(hasOffsets, hasPayloads).reset(postings, payloads); |
| } else { |
| final HighFreqTerm term = (HighFreqTerm) terms[termOrd]; |
| if (hasPos == false) { |
| return new HighFreqDocsEnum().reset(term.docIDs, term.freqs); |
| } else { |
| return new HighFreqPostingsEnum(hasOffsets).reset(term.docIDs, term.freqs, term.positions, term.payloads); |
| } |
| } |
| } |
| |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| final int[] postings = ((LowFreqTerm) terms[termOrd]).postings; |
| if (hasFreq) { |
| if (hasPos) { |
| int posLen; |
| if (hasOffsets) { |
| posLen = 3; |
| } else { |
| posLen = 1; |
| } |
| if (hasPayloads) { |
| posLen++; |
| } |
| LowFreqDocsEnum docsEnum; |
| if (reuse instanceof LowFreqDocsEnum) { |
| docsEnum = (LowFreqDocsEnum) reuse; |
| if (!docsEnum.canReuse(posLen)) { |
| docsEnum = new LowFreqDocsEnum(posLen); |
| } |
| } else { |
| docsEnum = new LowFreqDocsEnum(posLen); |
| } |
| |
| return docsEnum.reset(postings); |
| } else { |
| LowFreqDocsEnumNoPos docsEnum; |
| if (reuse instanceof LowFreqDocsEnumNoPos) { |
| docsEnum = (LowFreqDocsEnumNoPos) reuse; |
| } else { |
| docsEnum = new LowFreqDocsEnumNoPos(); |
| } |
| |
| return docsEnum.reset(postings); |
| } |
| } else { |
| LowFreqDocsEnumNoTF docsEnum; |
| if (reuse instanceof LowFreqDocsEnumNoTF) { |
| docsEnum = (LowFreqDocsEnumNoTF) reuse; |
| } else { |
| docsEnum = new LowFreqDocsEnumNoTF(); |
| } |
| |
| return docsEnum.reset(postings); |
| } |
| } else { |
| final HighFreqTerm term = (HighFreqTerm) terms[termOrd]; |
| |
| HighFreqDocsEnum docsEnum; |
| if (reuse instanceof HighFreqDocsEnum) { |
| docsEnum = (HighFreqDocsEnum) reuse; |
| } else { |
| docsEnum = new HighFreqDocsEnum(); |
| } |
| |
| //System.out.println(" DE for term=" + new BytesRef(terms[termOrd].term).utf8ToString() + ": " + term.docIDs.length + " docs"); |
| return docsEnum.reset(term.docIDs, term.freqs); |
| } |
| } |
| |
| @Override |
| public ImpactsEnum impacts(int flags) throws IOException { |
| return new SlowImpactsEnum(postings(null, flags)); |
| } |
| } |
| |
| private final class DirectIntersectTermsEnum extends BaseTermsEnum { |
| private final RunAutomaton runAutomaton; |
| private final CompiledAutomaton compiledAutomaton; |
| private int termOrd; |
| private final BytesRef scratch = new BytesRef(); |
| |
| private final class State { |
| int changeOrd; |
| int state; |
| int transitionUpto; |
| int transitionCount; |
| int transitionMax; |
| int transitionMin; |
| final Transition transition = new Transition(); |
| } |
| |
| private State[] states; |
| private int stateUpto; |
| |
| public DirectIntersectTermsEnum(CompiledAutomaton compiled, BytesRef startTerm) { |
| runAutomaton = compiled.runAutomaton; |
| compiledAutomaton = compiled; |
| termOrd = -1; |
| states = new State[1]; |
| states[0] = new State(); |
| states[0].changeOrd = terms.length; |
| states[0].state = 0; |
| states[0].transitionCount = compiledAutomaton.automaton.getNumTransitions(states[0].state); |
| compiledAutomaton.automaton.initTransition(states[0].state, states[0].transition); |
| states[0].transitionUpto = -1; |
| states[0].transitionMax = -1; |
| |
| //System.out.println("IE.init startTerm=" + startTerm); |
| |
| if (startTerm != null) { |
| int skipUpto = 0; |
| if (startTerm.length == 0) { |
| if (terms.length > 0 && termOffsets[1] == 0) { |
| termOrd = 0; |
| } |
| } else { |
| termOrd++; |
| |
| nextLabel: |
| for(int i=0;i<startTerm.length;i++) { |
| final int label = startTerm.bytes[startTerm.offset+i] & 0xFF; |
| |
| while (label > states[i].transitionMax) { |
| states[i].transitionUpto++; |
| assert states[i].transitionUpto < states[i].transitionCount; |
| compiledAutomaton.automaton.getNextTransition(states[i].transition); |
| states[i].transitionMin = states[i].transition.min; |
| states[i].transitionMax = states[i].transition.max; |
| assert states[i].transitionMin >= 0; |
| assert states[i].transitionMin <= 255; |
| assert states[i].transitionMax >= 0; |
| assert states[i].transitionMax <= 255; |
| } |
| |
| // Skip forwards until we find a term matching |
| // the label at this position: |
| while (termOrd < terms.length) { |
| final int skipOffset = skipOffsets[termOrd]; |
| final int numSkips = skipOffsets[termOrd+1] - skipOffset; |
| final int termOffset = termOffsets[termOrd]; |
| final int termLength = termOffsets[1+termOrd] - termOffset; |
| |
| // if (DEBUG) { |
| // System.out.println(" check termOrd=" + termOrd + " term=" + new BytesRef(termBytes, termOffset, termLength).utf8ToString() + " skips=" + Arrays.toString(skips) + " i=" + i); |
| // } |
| |
| if (termOrd == states[stateUpto].changeOrd) { |
| // if (DEBUG) { |
| // System.out.println(" end push return"); |
| // } |
| stateUpto--; |
| termOrd--; |
| return; |
| } |
| |
| if (termLength == i) { |
| termOrd++; |
| skipUpto = 0; |
| // if (DEBUG) { |
| // System.out.println(" term too short; next term"); |
| // } |
| } else if (label < (termBytes[termOffset+i] & 0xFF)) { |
| termOrd--; |
| // if (DEBUG) { |
| // System.out.println(" no match; already beyond; return termOrd=" + termOrd); |
| // } |
| stateUpto -= skipUpto; |
| assert stateUpto >= 0; |
| return; |
| } else if (label == (termBytes[termOffset+i] & 0xFF)) { |
| // if (DEBUG) { |
| // System.out.println(" label[" + i + "] matches"); |
| // } |
| if (skipUpto < numSkips) { |
| grow(); |
| |
| final int nextState = runAutomaton.step(states[stateUpto].state, label); |
| |
| // Automaton is required to accept startTerm: |
| assert nextState != -1; |
| |
| stateUpto++; |
| states[stateUpto].changeOrd = skips[skipOffset + skipUpto++]; |
| states[stateUpto].state = nextState; |
| states[stateUpto].transitionCount = compiledAutomaton.automaton.getNumTransitions(nextState); |
| compiledAutomaton.automaton.initTransition(states[stateUpto].state, states[stateUpto].transition); |
| states[stateUpto].transitionUpto = -1; |
| states[stateUpto].transitionMax = -1; |
| //System.out.println(" push " + states[stateUpto].transitions.length + " trans"); |
| |
| // if (DEBUG) { |
| // System.out.println(" push skip; changeOrd=" + states[stateUpto].changeOrd); |
| // } |
| |
| // Match next label at this same term: |
| continue nextLabel; |
| } else { |
| // if (DEBUG) { |
| // System.out.println(" linear scan"); |
| // } |
| // Index exhausted: just scan now (the |
| // number of scans required will be less |
| // than the minSkipCount): |
| final int startTermOrd = termOrd; |
| while (termOrd < terms.length && compare(termOrd, startTerm) <= 0) { |
| assert termOrd == startTermOrd || skipOffsets[termOrd] == skipOffsets[termOrd+1]; |
| termOrd++; |
| } |
| assert termOrd - startTermOrd < minSkipCount; |
| termOrd--; |
| stateUpto -= skipUpto; |
| // if (DEBUG) { |
| // System.out.println(" end termOrd=" + termOrd); |
| // } |
| return; |
| } |
| } else { |
| if (skipUpto < numSkips) { |
| termOrd = skips[skipOffset + skipUpto]; |
| // if (DEBUG) { |
| // System.out.println(" no match; skip to termOrd=" + termOrd); |
| // } |
| } else { |
| // if (DEBUG) { |
| // System.out.println(" no match; next term"); |
| // } |
| termOrd++; |
| } |
| skipUpto = 0; |
| } |
| } |
| |
| // startTerm is >= last term so enum will not |
| // return any terms: |
| termOrd--; |
| // if (DEBUG) { |
| // System.out.println(" beyond end; no terms will match"); |
| // } |
| return; |
| } |
| } |
| |
| final int termOffset = termOffsets[termOrd]; |
| final int termLen = termOffsets[1+termOrd] - termOffset; |
| |
| if (termOrd >= 0 && !startTerm.equals(new BytesRef(termBytes, termOffset, termLen))) { |
| stateUpto -= skipUpto; |
| termOrd--; |
| } |
| // if (DEBUG) { |
| // System.out.println(" loop end; return termOrd=" + termOrd + " stateUpto=" + stateUpto); |
| // } |
| } |
| } |
| |
| private void grow() { |
| if (states.length == 1+stateUpto) { |
| final State[] newStates = new State[states.length+1]; |
| System.arraycopy(states, 0, newStates, 0, states.length); |
| newStates[states.length] = new State(); |
| states = newStates; |
| } |
| } |
| |
| @Override |
| public BytesRef next() { |
| // if (DEBUG) { |
| // System.out.println("\nIE.next"); |
| // } |
| |
| termOrd++; |
| int skipUpto = 0; |
| |
| if (termOrd == 0 && termOffsets[1] == 0) { |
| // Special-case empty string: |
| assert stateUpto == 0; |
| // if (DEBUG) { |
| // System.out.println(" visit empty string"); |
| // } |
| if (runAutomaton.isAccept(states[0].state)) { |
| scratch.bytes = termBytes; |
| scratch.offset = 0; |
| scratch.length = 0; |
| return scratch; |
| } |
| termOrd++; |
| } |
| |
| nextTerm: |
| |
| while (true) { |
| // if (DEBUG) { |
| // System.out.println(" cycle termOrd=" + termOrd + " stateUpto=" + stateUpto + " skipUpto=" + skipUpto); |
| // } |
| if (termOrd == terms.length) { |
| // if (DEBUG) { |
| // System.out.println(" return END"); |
| // } |
| return null; |
| } |
| |
| final State state = states[stateUpto]; |
| if (termOrd == state.changeOrd) { |
| // Pop: |
| // if (DEBUG) { |
| // System.out.println(" pop stateUpto=" + stateUpto); |
| // } |
| stateUpto--; |
| /* |
| if (DEBUG) { |
| try { |
| //System.out.println(" prefix pop " + new BytesRef(terms[termOrd].term, 0, Math.min(stateUpto, terms[termOrd].term.length)).utf8ToString()); |
| System.out.println(" prefix pop " + new BytesRef(terms[termOrd].term, 0, Math.min(stateUpto, terms[termOrd].term.length))); |
| } catch (ArrayIndexOutOfBoundsException aioobe) { |
| System.out.println(" prefix pop " + new BytesRef(terms[termOrd].term, 0, Math.min(stateUpto, terms[termOrd].term.length))); |
| } |
| } |
| */ |
| |
| continue; |
| } |
| |
| final int termOffset = termOffsets[termOrd]; |
| final int termLength = termOffsets[termOrd+1] - termOffset; |
| final int skipOffset = skipOffsets[termOrd]; |
| final int numSkips = skipOffsets[termOrd+1] - skipOffset; |
| |
| // if (DEBUG) { |
| // System.out.println(" term=" + new BytesRef(termBytes, termOffset, termLength).utf8ToString() + " skips=" + Arrays.toString(skips)); |
| // } |
| |
| assert termOrd < state.changeOrd; |
| |
| assert stateUpto <= termLength: "term.length=" + termLength + "; stateUpto=" + stateUpto; |
| final int label = termBytes[termOffset+stateUpto] & 0xFF; |
| |
| while (label > state.transitionMax) { |
| //System.out.println(" label=" + label + " vs max=" + state.transitionMax + " transUpto=" + state.transitionUpto + " vs " + state.transitions.length); |
| state.transitionUpto++; |
| if (state.transitionUpto == state.transitionCount) { |
| // We've exhausted transitions leaving this |
| // state; force pop+next/skip now: |
| //System.out.println("forcepop: stateUpto=" + stateUpto); |
| if (stateUpto == 0) { |
| termOrd = terms.length; |
| return null; |
| } else { |
| assert state.changeOrd > termOrd; |
| // if (DEBUG) { |
| // System.out.println(" jumpend " + (state.changeOrd - termOrd)); |
| // } |
| //System.out.println(" jump to termOrd=" + states[stateUpto].changeOrd + " vs " + termOrd); |
| termOrd = states[stateUpto].changeOrd; |
| skipUpto = 0; |
| stateUpto--; |
| } |
| continue nextTerm; |
| } |
| compiledAutomaton.automaton.getNextTransition(state.transition); |
| assert state.transitionUpto < state.transitionCount: " state.transitionUpto=" + state.transitionUpto + " vs " + state.transitionCount; |
| state.transitionMin = state.transition.min; |
| state.transitionMax = state.transition.max; |
| assert state.transitionMin >= 0; |
| assert state.transitionMin <= 255; |
| assert state.transitionMax >= 0; |
| assert state.transitionMax <= 255; |
| } |
| |
| /* |
| if (DEBUG) { |
| System.out.println(" check ord=" + termOrd + " term[" + stateUpto + "]=" + (char) label + "(" + label + ") term=" + new BytesRef(terms[termOrd].term).utf8ToString() + " trans " + |
| (char) state.transitionMin + "(" + state.transitionMin + ")" + "-" + (char) state.transitionMax + "(" + state.transitionMax + ") nextChange=+" + (state.changeOrd - termOrd) + " skips=" + (skips == null ? "null" : Arrays.toString(skips))); |
| System.out.println(" check ord=" + termOrd + " term[" + stateUpto + "]=" + Integer.toHexString(label) + "(" + label + ") term=" + new BytesRef(termBytes, termOffset, termLength) + " trans " + |
| Integer.toHexString(state.transitionMin) + "(" + state.transitionMin + ")" + "-" + Integer.toHexString(state.transitionMax) + "(" + state.transitionMax + ") nextChange=+" + (state.changeOrd - termOrd) + " skips=" + (skips == null ? "null" : Arrays.toString(skips))); |
| } |
| */ |
| |
| final int targetLabel = state.transitionMin; |
| |
| if ((termBytes[termOffset+stateUpto] & 0xFF) < targetLabel) { |
| // if (DEBUG) { |
| // System.out.println(" do bin search"); |
| // } |
| //int startTermOrd = termOrd; |
| int low = termOrd+1; |
| int high = state.changeOrd-1; |
| while (true) { |
| if (low > high) { |
| // Label not found |
| termOrd = low; |
| // if (DEBUG) { |
| // System.out.println(" advanced by " + (termOrd - startTermOrd)); |
| // } |
| //System.out.println(" jump " + (termOrd - startTermOrd)); |
| skipUpto = 0; |
| continue nextTerm; |
| } |
| int mid = (low + high) >>> 1; |
| int cmp = (termBytes[termOffsets[mid] + stateUpto] & 0xFF) - targetLabel; |
| // if (DEBUG) { |
| // System.out.println(" bin: check label=" + (char) (termBytes[termOffsets[low] + stateUpto] & 0xFF) + " ord=" + mid); |
| // } |
| if (cmp < 0) { |
| low = mid+1; |
| } else if (cmp > 0) { |
| high = mid - 1; |
| } else { |
| // Label found; walk backwards to first |
| // occurrence: |
| while (mid > termOrd && (termBytes[termOffsets[mid-1] + stateUpto] & 0xFF) == targetLabel) { |
| mid--; |
| } |
| termOrd = mid; |
| // if (DEBUG) { |
| // System.out.println(" advanced by " + (termOrd - startTermOrd)); |
| // } |
| //System.out.println(" jump " + (termOrd - startTermOrd)); |
| skipUpto = 0; |
| continue nextTerm; |
| } |
| } |
| } |
| |
| int nextState = runAutomaton.step(states[stateUpto].state, label); |
| |
| if (nextState == -1) { |
| // Skip |
| // if (DEBUG) { |
| // System.out.println(" automaton doesn't accept; skip"); |
| // } |
| if (skipUpto < numSkips) { |
| // if (DEBUG) { |
| // System.out.println(" jump " + (skips[skipOffset+skipUpto]-1 - termOrd)); |
| // } |
| termOrd = skips[skipOffset+skipUpto]; |
| } else { |
| termOrd++; |
| } |
| skipUpto = 0; |
| } else if (skipUpto < numSkips) { |
| // Push: |
| // if (DEBUG) { |
| // System.out.println(" push"); |
| // } |
| /* |
| if (DEBUG) { |
| try { |
| //System.out.println(" prefix push " + new BytesRef(term, 0, stateUpto+1).utf8ToString()); |
| System.out.println(" prefix push " + new BytesRef(term, 0, stateUpto+1)); |
| } catch (ArrayIndexOutOfBoundsException aioobe) { |
| System.out.println(" prefix push " + new BytesRef(term, 0, stateUpto+1)); |
| } |
| } |
| */ |
| |
| grow(); |
| stateUpto++; |
| states[stateUpto].state = nextState; |
| states[stateUpto].changeOrd = skips[skipOffset + skipUpto++]; |
| states[stateUpto].transitionCount = compiledAutomaton.automaton.getNumTransitions(nextState); |
| compiledAutomaton.automaton.initTransition(nextState, states[stateUpto].transition); |
| states[stateUpto].transitionUpto = -1; |
| states[stateUpto].transitionMax = -1; |
| |
| if (stateUpto == termLength) { |
| // if (DEBUG) { |
| // System.out.println(" term ends after push"); |
| // } |
| if (runAutomaton.isAccept(nextState)) { |
| // if (DEBUG) { |
| // System.out.println(" automaton accepts: return"); |
| // } |
| scratch.bytes = termBytes; |
| scratch.offset = termOffsets[termOrd]; |
| scratch.length = termOffsets[1+termOrd] - scratch.offset; |
| // if (DEBUG) { |
| // System.out.println(" ret " + scratch.utf8ToString()); |
| // } |
| return scratch; |
| } else { |
| // if (DEBUG) { |
| // System.out.println(" automaton rejects: nextTerm"); |
| // } |
| termOrd++; |
| skipUpto = 0; |
| } |
| } |
| } else { |
| // Run the non-indexed tail of this term: |
| |
| // TODO: add assert that we don't inc too many times |
| |
| if (compiledAutomaton.commonSuffixRef != null) { |
| //System.out.println("suffix " + compiledAutomaton.commonSuffixRef.utf8ToString()); |
| assert compiledAutomaton.commonSuffixRef.offset == 0; |
| if (termLength < compiledAutomaton.commonSuffixRef.length) { |
| termOrd++; |
| skipUpto = 0; |
| continue nextTerm; |
| } |
| int offset = termOffset + termLength - compiledAutomaton.commonSuffixRef.length; |
| for(int suffix=0;suffix<compiledAutomaton.commonSuffixRef.length;suffix++) { |
| if (termBytes[offset + suffix] != compiledAutomaton.commonSuffixRef.bytes[suffix]) { |
| termOrd++; |
| skipUpto = 0; |
| continue nextTerm; |
| } |
| } |
| } |
| |
| int upto = stateUpto+1; |
| while (upto < termLength) { |
| nextState = runAutomaton.step(nextState, termBytes[termOffset+upto] & 0xFF); |
| if (nextState == -1) { |
| termOrd++; |
| skipUpto = 0; |
| // if (DEBUG) { |
| // System.out.println(" nomatch tail; next term"); |
| // } |
| continue nextTerm; |
| } |
| upto++; |
| } |
| |
| if (runAutomaton.isAccept(nextState)) { |
| scratch.bytes = termBytes; |
| scratch.offset = termOffsets[termOrd]; |
| scratch.length = termOffsets[1+termOrd] - scratch.offset; |
| // if (DEBUG) { |
| // System.out.println(" match tail; return " + scratch.utf8ToString()); |
| // System.out.println(" ret2 " + scratch.utf8ToString()); |
| // } |
| return scratch; |
| } else { |
| termOrd++; |
| skipUpto = 0; |
| // if (DEBUG) { |
| // System.out.println(" nomatch tail; next term"); |
| // } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public TermState termState() { |
| OrdTermState state = new OrdTermState(); |
| state.ord = termOrd; |
| return state; |
| } |
| |
| @Override |
| public BytesRef term() { |
| return scratch; |
| } |
| |
| @Override |
| public long ord() { |
| return termOrd; |
| } |
| |
| @Override |
| public int docFreq() { |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| return ((LowFreqTerm) terms[termOrd]).docFreq; |
| } else { |
| return ((HighFreqTerm) terms[termOrd]).docIDs.length; |
| } |
| } |
| |
| @Override |
| public long totalTermFreq() { |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| return ((LowFreqTerm) terms[termOrd]).totalTermFreq; |
| } else { |
| return ((HighFreqTerm) terms[termOrd]).totalTermFreq; |
| } |
| } |
| |
| @Override |
| public PostingsEnum postings(PostingsEnum reuse, int flags) { |
| // TODO: implement reuse |
| // it's hairy! |
| |
| // TODO: the logic of which enum impl to choose should be refactored to be simpler... |
| if (hasPos && PostingsEnum.featureRequested(flags, PostingsEnum.POSITIONS)) { |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| final LowFreqTerm term = ((LowFreqTerm) terms[termOrd]); |
| final int[] postings = term.postings; |
| final byte[] payloads = term.payloads; |
| return new LowFreqPostingsEnum(hasOffsets, hasPayloads).reset(postings, payloads); |
| } else { |
| final HighFreqTerm term = (HighFreqTerm) terms[termOrd]; |
| return new HighFreqPostingsEnum(hasOffsets).reset(term.docIDs, term.freqs, term.positions, term.payloads); |
| } |
| } |
| |
| if (terms[termOrd] instanceof LowFreqTerm) { |
| final int[] postings = ((LowFreqTerm) terms[termOrd]).postings; |
| if (hasFreq) { |
| if (hasPos) { |
| int posLen; |
| if (hasOffsets) { |
| posLen = 3; |
| } else { |
| posLen = 1; |
| } |
| if (hasPayloads) { |
| posLen++; |
| } |
| return new LowFreqDocsEnum(posLen).reset(postings); |
| } else { |
| return new LowFreqDocsEnumNoPos().reset(postings); |
| } |
| } else { |
| return new LowFreqDocsEnumNoTF().reset(postings); |
| } |
| } else { |
| final HighFreqTerm term = (HighFreqTerm) terms[termOrd]; |
| // System.out.println("DE for term=" + new BytesRef(terms[termOrd].term).utf8ToString() + ": " + term.docIDs.length + " docs"); |
| return new HighFreqDocsEnum().reset(term.docIDs, term.freqs); |
| } |
| } |
| |
| @Override |
| public ImpactsEnum impacts(int flags) throws IOException { |
| return new SlowImpactsEnum(postings(null, flags)); |
| } |
| |
| @Override |
| public SeekStatus seekCeil(BytesRef term) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void seekExact(long ord) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| } |
| } |
| |
| // Docs only: |
| private final static class LowFreqDocsEnumNoTF extends PostingsEnum { |
| private int[] postings; |
| private int upto; |
| |
| public PostingsEnum reset(int[] postings) { |
| this.postings = postings; |
| upto = -1; |
| return this; |
| } |
| |
| // TODO: can do this w/o setting members? |
| |
| @Override |
| public int nextDoc() { |
| upto++; |
| if (upto < postings.length) { |
| return postings[upto]; |
| } |
| return NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int docID() { |
| if (upto < 0) { |
| return -1; |
| } else if (upto < postings.length) { |
| return postings[upto]; |
| } else { |
| return NO_MORE_DOCS; |
| } |
| } |
| |
| @Override |
| public int freq() { |
| return 1; |
| } |
| |
| @Override |
| public int nextPosition() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int startOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int endOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public BytesRef getPayload() throws IOException { |
| return null; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| // Linear scan, but this is low-freq term so it won't |
| // be costly: |
| return slowAdvance(target); |
| } |
| |
| @Override |
| public long cost() { |
| return postings.length; |
| } |
| } |
| |
| // Docs + freqs: |
| private final static class LowFreqDocsEnumNoPos extends PostingsEnum { |
| private int[] postings; |
| private int upto; |
| |
| public LowFreqDocsEnumNoPos() {} |
| |
| public PostingsEnum reset(int[] postings) { |
| this.postings = postings; |
| upto = -2; |
| return this; |
| } |
| |
| // TODO: can do this w/o setting members? |
| @Override |
| public int nextDoc() { |
| upto += 2; |
| if (upto < postings.length) { |
| return postings[upto]; |
| } |
| return NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int docID() { |
| if (upto < 0) { |
| return -1; |
| } else if (upto < postings.length) { |
| return postings[upto]; |
| } else { |
| return NO_MORE_DOCS; |
| } |
| } |
| |
| @Override |
| public int freq() { |
| return postings[upto+1]; |
| } |
| |
| @Override |
| public int nextPosition() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int startOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int endOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public BytesRef getPayload() throws IOException { |
| return null; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| // Linear scan, but this is low-freq term so it won't |
| // be costly: |
| return slowAdvance(target); |
| } |
| |
| @Override |
| public long cost() { |
| return postings.length / 2; |
| } |
| } |
| |
| // Docs + freqs + positions/offsets: |
| private final static class LowFreqDocsEnum extends PostingsEnum { |
| private int[] postings; |
| private final int posMult; |
| private int upto; |
| private int freq; |
| |
| public LowFreqDocsEnum(int posMult) { |
| this.posMult = posMult; |
| // if (DEBUG) { |
| // System.out.println("LowFreqDE: posMult=" + posMult); |
| // } |
| } |
| |
| public boolean canReuse(int posMult) { |
| return this.posMult == posMult; |
| } |
| |
| public PostingsEnum reset(int[] postings) { |
| this.postings = postings; |
| upto = -2; |
| freq = 0; |
| return this; |
| } |
| |
| // TODO: can do this w/o setting members? |
| @Override |
| public int nextDoc() { |
| upto += 2 + freq*posMult; |
| // if (DEBUG) { |
| // System.out.println(" nextDoc freq=" + freq + " upto=" + upto + " vs " + postings.length); |
| // } |
| if (upto < postings.length) { |
| freq = postings[upto+1]; |
| assert freq > 0; |
| return postings[upto]; |
| } |
| return NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int docID() { |
| // TODO: store docID member? |
| if (upto < 0) { |
| return -1; |
| } else if (upto < postings.length) { |
| return postings[upto]; |
| } else { |
| return NO_MORE_DOCS; |
| } |
| } |
| |
| @Override |
| public int freq() { |
| // TODO: can I do postings[upto+1]? |
| return freq; |
| } |
| |
| @Override |
| public int nextPosition() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int startOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int endOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public BytesRef getPayload() throws IOException { |
| return null; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| // Linear scan, but this is low-freq term so it won't |
| // be costly: |
| return slowAdvance(target); |
| } |
| |
| @Override |
| public long cost() { |
| // TODO: could do a better estimate |
| return postings.length / 2; |
| } |
| } |
| |
| private final static class LowFreqPostingsEnum extends PostingsEnum { |
| private int[] postings; |
| private final int posMult; |
| private final boolean hasOffsets; |
| private final boolean hasPayloads; |
| private final BytesRef payload = new BytesRef(); |
| private int upto; |
| private int docID; |
| private int freq; |
| private int skipPositions; |
| private int pos; |
| private int startOffset; |
| private int endOffset; |
| private int lastPayloadOffset; |
| private int payloadOffset; |
| private int payloadLength; |
| private byte[] payloadBytes; |
| |
| public LowFreqPostingsEnum(boolean hasOffsets, boolean hasPayloads) { |
| this.hasOffsets = hasOffsets; |
| this.hasPayloads = hasPayloads; |
| if (hasOffsets) { |
| if (hasPayloads) { |
| posMult = 4; |
| } else { |
| posMult = 3; |
| } |
| } else if (hasPayloads) { |
| posMult = 2; |
| } else { |
| posMult = 1; |
| } |
| } |
| |
| public PostingsEnum reset(int[] postings, byte[] payloadBytes) { |
| this.postings = postings; |
| upto = 0; |
| skipPositions = 0; |
| pos = -1; |
| startOffset = -1; |
| endOffset = -1; |
| docID = -1; |
| payloadLength = 0; |
| this.payloadBytes = payloadBytes; |
| return this; |
| } |
| |
| @Override |
| public int nextDoc() { |
| pos = -1; |
| if (hasPayloads) { |
| for(int i=0;i<skipPositions;i++) { |
| upto++; |
| if (hasOffsets) { |
| upto += 2; |
| } |
| payloadOffset += postings[upto++]; |
| } |
| } else { |
| upto += posMult * skipPositions; |
| } |
| |
| if (upto < postings.length) { |
| docID = postings[upto++]; |
| freq = postings[upto++]; |
| skipPositions = freq; |
| return docID; |
| } |
| |
| return docID = NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int docID() { |
| return docID; |
| } |
| |
| @Override |
| public int freq() { |
| return freq; |
| } |
| |
| @Override |
| public int nextPosition() { |
| assert skipPositions > 0; |
| skipPositions--; |
| pos = postings[upto++]; |
| if (hasOffsets) { |
| startOffset = postings[upto++]; |
| endOffset = postings[upto++]; |
| } |
| if (hasPayloads) { |
| payloadLength = postings[upto++]; |
| lastPayloadOffset = payloadOffset; |
| payloadOffset += payloadLength; |
| } |
| return pos; |
| } |
| |
| @Override |
| public int startOffset() { |
| return startOffset; |
| } |
| |
| @Override |
| public int endOffset() { |
| return endOffset; |
| } |
| |
| @Override |
| public int advance(int target) throws IOException { |
| return slowAdvance(target); |
| } |
| |
| @Override |
| public BytesRef getPayload() { |
| if (payloadLength > 0) { |
| payload.bytes = payloadBytes; |
| payload.offset = lastPayloadOffset; |
| payload.length = payloadLength; |
| return payload; |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public long cost() { |
| // TODO: could do a better estimate |
| return postings.length / 2; |
| } |
| } |
| |
| // Docs + freqs: |
| private final static class HighFreqDocsEnum extends PostingsEnum { |
| private int[] docIDs; |
| private int[] freqs; |
| private int upto; |
| private int docID = -1; |
| |
| public HighFreqDocsEnum() {} |
| |
| public int[] getDocIDs() { |
| return docIDs; |
| } |
| |
| public int[] getFreqs() { |
| return freqs; |
| } |
| |
| public PostingsEnum reset(int[] docIDs, int[] freqs) { |
| this.docIDs = docIDs; |
| this.freqs = freqs; |
| docID = upto = -1; |
| return this; |
| } |
| |
| @Override |
| public int nextDoc() { |
| upto++; |
| try { |
| return docID = docIDs[upto]; |
| } catch (ArrayIndexOutOfBoundsException e) { |
| } |
| return docID = NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int docID() { |
| return docID; |
| } |
| |
| @Override |
| public int freq() { |
| if (freqs == null) { |
| return 1; |
| } else { |
| return freqs[upto]; |
| } |
| } |
| |
| @Override |
| public int advance(int target) { |
| /* |
| upto++; |
| if (upto == docIDs.length) { |
| return docID = NO_MORE_DOCS; |
| } |
| final int index = Arrays.binarySearch(docIDs, upto, docIDs.length, target); |
| if (index < 0) { |
| upto = -index - 1; |
| } else { |
| upto = index; |
| } |
| if (liveDocs != null) { |
| while (upto < docIDs.length) { |
| if (liveDocs.get(docIDs[upto])) { |
| break; |
| } |
| upto++; |
| } |
| } |
| if (upto == docIDs.length) { |
| return NO_MORE_DOCS; |
| } else { |
| return docID = docIDs[upto]; |
| } |
| */ |
| |
| //System.out.println(" advance target=" + target + " cur=" + docID() + " upto=" + upto + " of " + docIDs.length); |
| // if (DEBUG) { |
| // System.out.println("advance target=" + target + " len=" + docIDs.length); |
| // } |
| upto++; |
| if (upto == docIDs.length) { |
| return docID = NO_MORE_DOCS; |
| } |
| |
| // First "grow" outwards, since most advances are to |
| // nearby docs: |
| int inc = 10; |
| int nextUpto = upto+10; |
| int low; |
| int high; |
| while (true) { |
| //System.out.println(" grow nextUpto=" + nextUpto + " inc=" + inc); |
| if (nextUpto >= docIDs.length) { |
| low = nextUpto-inc; |
| high = docIDs.length-1; |
| break; |
| } |
| //System.out.println(" docID=" + docIDs[nextUpto]); |
| |
| if (target <= docIDs[nextUpto]) { |
| low = nextUpto-inc; |
| high = nextUpto; |
| break; |
| } |
| inc *= 2; |
| nextUpto += inc; |
| } |
| |
| // Now do normal binary search |
| //System.out.println(" after fwd: low=" + low + " high=" + high); |
| |
| while (true) { |
| |
| if (low > high) { |
| // Not exactly found |
| //System.out.println(" break: no match"); |
| upto = low; |
| break; |
| } |
| |
| int mid = (low + high) >>> 1; |
| int cmp = docIDs[mid] - target; |
| //System.out.println(" bsearch low=" + low + " high=" + high+ ": docIDs[" + mid + "]=" + docIDs[mid]); |
| |
| if (cmp < 0) { |
| low = mid + 1; |
| } else if (cmp > 0) { |
| high = mid - 1; |
| } else { |
| // Found target |
| upto = mid; |
| //System.out.println(" break: match"); |
| break; |
| } |
| } |
| |
| //System.out.println(" end upto=" + upto + " docID=" + (upto >= docIDs.length ? NO_MORE_DOCS : docIDs[upto])); |
| |
| if (upto == docIDs.length) { |
| //System.out.println(" return END"); |
| return docID = NO_MORE_DOCS; |
| } else { |
| //System.out.println(" return docID=" + docIDs[upto] + " upto=" + upto); |
| return docID = docIDs[upto]; |
| } |
| } |
| |
| @Override |
| public long cost() { |
| return docIDs.length; |
| } |
| |
| @Override |
| public int nextPosition() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int startOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public int endOffset() throws IOException { |
| return -1; |
| } |
| |
| @Override |
| public BytesRef getPayload() throws IOException { |
| return null; |
| } |
| } |
| |
| // TODO: specialize offsets and not |
| private final static class HighFreqPostingsEnum extends PostingsEnum { |
| private int[] docIDs; |
| private int[] freqs; |
| private int[][] positions; |
| private byte[][][] payloads; |
| private final boolean hasOffsets; |
| private final int posJump; |
| private int upto; |
| private int docID = -1; |
| private int posUpto; |
| private int[] curPositions; |
| |
| public HighFreqPostingsEnum(boolean hasOffsets) { |
| this.hasOffsets = hasOffsets; |
| posJump = hasOffsets ? 3 : 1; |
| } |
| |
| public int[] getDocIDs() { |
| return docIDs; |
| } |
| |
| public int[][] getPositions() { |
| return positions; |
| } |
| |
| public int getPosJump() { |
| return posJump; |
| } |
| |
| public PostingsEnum reset(int[] docIDs, int[] freqs, int[][] positions, byte[][][] payloads) { |
| this.docIDs = docIDs; |
| this.freqs = freqs; |
| this.positions = positions; |
| this.payloads = payloads; |
| upto = -1; |
| return this; |
| } |
| |
| @Override |
| public int nextDoc() { |
| upto++; |
| if (upto < docIDs.length) { |
| posUpto = -posJump; |
| curPositions = positions[upto]; |
| return docID = docIDs[upto]; |
| } |
| |
| return docID = NO_MORE_DOCS; |
| } |
| |
| @Override |
| public int freq() { |
| return freqs[upto]; |
| } |
| |
| @Override |
| public int docID() { |
| return docID; |
| } |
| |
| @Override |
| public int nextPosition() { |
| posUpto += posJump; |
| assert posUpto < curPositions.length; |
| return curPositions[posUpto]; |
| } |
| |
| @Override |
| public int startOffset() { |
| if (hasOffsets) { |
| return curPositions[posUpto+1]; |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public int endOffset() { |
| if (hasOffsets) { |
| return curPositions[posUpto+2]; |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public int advance(int target) { |
| |
| /* |
| upto++; |
| if (upto == docIDs.length) { |
| return NO_MORE_DOCS; |
| } |
| final int index = Arrays.binarySearch(docIDs, upto, docIDs.length, target); |
| if (index < 0) { |
| upto = -index - 1; |
| } else { |
| upto = index; |
| } |
| if (liveDocs != null) { |
| while (upto < docIDs.length) { |
| if (liveDocs.get(docIDs[upto])) { |
| break; |
| } |
| upto++; |
| } |
| } |
| posUpto = hasOffsets ? -3 : -1; |
| if (upto == docIDs.length) { |
| return NO_MORE_DOCS; |
| } else { |
| return docID(); |
| } |
| */ |
| |
| //System.out.println(" advance target=" + target + " cur=" + docID() + " upto=" + upto + " of " + docIDs.length); |
| // if (DEBUG) { |
| // System.out.println("advance target=" + target + " len=" + docIDs.length); |
| // } |
| upto++; |
| if (upto == docIDs.length) { |
| return docID = NO_MORE_DOCS; |
| } |
| |
| // First "grow" outwards, since most advances are to |
| // nearby docs: |
| int inc = 10; |
| int nextUpto = upto+10; |
| int low; |
| int high; |
| while (true) { |
| //System.out.println(" grow nextUpto=" + nextUpto + " inc=" + inc); |
| if (nextUpto >= docIDs.length) { |
| low = nextUpto-inc; |
| high = docIDs.length-1; |
| break; |
| } |
| //System.out.println(" docID=" + docIDs[nextUpto]); |
| |
| if (target <= docIDs[nextUpto]) { |
| low = nextUpto-inc; |
| high = nextUpto; |
| break; |
| } |
| inc *= 2; |
| nextUpto += inc; |
| } |
| |
| // Now do normal binary search |
| //System.out.println(" after fwd: low=" + low + " high=" + high); |
| |
| while (true) { |
| |
| if (low > high) { |
| // Not exactly found |
| //System.out.println(" break: no match"); |
| upto = low; |
| break; |
| } |
| |
| int mid = (low + high) >>> 1; |
| int cmp = docIDs[mid] - target; |
| //System.out.println(" bsearch low=" + low + " high=" + high+ ": docIDs[" + mid + "]=" + docIDs[mid]); |
| |
| if (cmp < 0) { |
| low = mid + 1; |
| } else if (cmp > 0) { |
| high = mid - 1; |
| } else { |
| // Found target |
| upto = mid; |
| //System.out.println(" break: match"); |
| break; |
| } |
| } |
| |
| //System.out.println(" end upto=" + upto + " docID=" + (upto >= docIDs.length ? NO_MORE_DOCS : docIDs[upto])); |
| |
| if (upto == docIDs.length) { |
| //System.out.println(" return END"); |
| return docID = NO_MORE_DOCS; |
| } else { |
| //System.out.println(" return docID=" + docIDs[upto] + " upto=" + upto); |
| posUpto = -posJump; |
| curPositions = positions[upto]; |
| return docID = docIDs[upto]; |
| } |
| } |
| |
| private final BytesRef payload = new BytesRef(); |
| |
| @Override |
| public BytesRef getPayload() { |
| if (payloads == null) { |
| return null; |
| } else { |
| final byte[] payloadBytes = payloads[upto][posUpto/(hasOffsets ? 3:1)]; |
| if (payloadBytes == null) { |
| return null; |
| } |
| payload.bytes = payloadBytes; |
| payload.length = payloadBytes.length; |
| payload.offset = 0; |
| return payload; |
| } |
| } |
| |
| @Override |
| public long cost() { |
| return docIDs.length; |
| } |
| } |
| } |
