mirror of https://github.com/apache/lucene.git
LUCENE-5675: break out IntersectTermsEnumFrame
git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5675@1595027 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless
parent
13f3c95c62
commit
ee1c309e6f
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@ -19,13 +19,11 @@ package org.apache.lucene.codecs.blocktree;
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import java.io.IOException;
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import java.io.IOException;
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import org.apache.lucene.codecs.BlockTermState;
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import org.apache.lucene.index.DocsAndPositionsEnum;
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import org.apache.lucene.index.DocsAndPositionsEnum;
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import org.apache.lucene.index.DocsEnum;
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import org.apache.lucene.index.DocsEnum;
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import org.apache.lucene.index.FieldInfo.IndexOptions;
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import org.apache.lucene.index.FieldInfo.IndexOptions;
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import org.apache.lucene.index.TermState;
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import org.apache.lucene.index.TermState;
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import org.apache.lucene.index.TermsEnum;
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import org.apache.lucene.index.TermsEnum;
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import org.apache.lucene.store.ByteArrayDataInput;
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import org.apache.lucene.store.IndexInput;
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import org.apache.lucene.store.IndexInput;
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import org.apache.lucene.util.ArrayUtil;
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import org.apache.lucene.util.ArrayUtil;
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import org.apache.lucene.util.Bits;
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import org.apache.lucene.util.Bits;
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@ -34,288 +32,26 @@ import org.apache.lucene.util.RamUsageEstimator;
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import org.apache.lucene.util.StringHelper;
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import org.apache.lucene.util.StringHelper;
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import org.apache.lucene.util.automaton.CompiledAutomaton;
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import org.apache.lucene.util.automaton.CompiledAutomaton;
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import org.apache.lucene.util.automaton.RunAutomaton;
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import org.apache.lucene.util.automaton.RunAutomaton;
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import org.apache.lucene.util.automaton.Transition;
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import org.apache.lucene.util.fst.FST;
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import org.apache.lucene.util.fst.FST;
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// NOTE: cannot seek!
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// NOTE: cannot seek!
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final class IntersectTermsEnum extends TermsEnum {
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final class IntersectTermsEnum extends TermsEnum {
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private final IndexInput in;
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final IndexInput in;
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private Frame[] stack;
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private IntersectTermsEnumFrame[] stack;
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@SuppressWarnings({"rawtypes","unchecked"}) private FST.Arc<BytesRef>[] arcs = new FST.Arc[5];
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@SuppressWarnings({"rawtypes","unchecked"}) private FST.Arc<BytesRef>[] arcs = new FST.Arc[5];
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private final RunAutomaton runAutomaton;
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final RunAutomaton runAutomaton;
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private final CompiledAutomaton compiledAutomaton;
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final CompiledAutomaton compiledAutomaton;
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private Frame currentFrame;
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private IntersectTermsEnumFrame currentFrame;
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private final BytesRef term = new BytesRef();
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private final BytesRef term = new BytesRef();
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private final FST.BytesReader fstReader;
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private final FST.BytesReader fstReader;
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private final FieldReader fr;
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final FieldReader fr;
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// TODO: can we share this with the frame in STE?
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private final class Frame {
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final int ord;
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long fp;
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long fpOrig;
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long fpEnd;
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long lastSubFP;
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// State in automaton
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int state;
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int metaDataUpto;
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byte[] suffixBytes = new byte[128];
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final ByteArrayDataInput suffixesReader = new ByteArrayDataInput();
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byte[] statBytes = new byte[64];
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final ByteArrayDataInput statsReader = new ByteArrayDataInput();
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byte[] floorData = new byte[32];
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final ByteArrayDataInput floorDataReader = new ByteArrayDataInput();
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// Length of prefix shared by all terms in this block
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int prefix;
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// Number of entries (term or sub-block) in this block
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int entCount;
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// Which term we will next read
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int nextEnt;
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// True if this block is either not a floor block,
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// or, it's the last sub-block of a floor block
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boolean isLastInFloor;
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// True if all entries are terms
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boolean isLeafBlock;
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int numFollowFloorBlocks;
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int nextFloorLabel;
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Transition[] transitions;
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int curTransitionMax;
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int transitionIndex;
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FST.Arc<BytesRef> arc;
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final BlockTermState termState;
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// metadata buffer, holding monotonic values
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public long[] longs;
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// metadata buffer, holding general values
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public byte[] bytes;
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ByteArrayDataInput bytesReader;
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// Cumulative output so far
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BytesRef outputPrefix;
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private int startBytePos;
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private int suffix;
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public Frame(int ord) throws IOException {
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this.ord = ord;
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this.termState = fr.parent.postingsReader.newTermState();
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this.termState.totalTermFreq = -1;
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this.longs = new long[fr.longsSize];
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}
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void loadNextFloorBlock() throws IOException {
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assert numFollowFloorBlocks > 0;
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//if (DEBUG) System.out.println(" loadNextFoorBlock trans=" + transitions[transitionIndex]);
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do {
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fp = fpOrig + (floorDataReader.readVLong() >>> 1);
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numFollowFloorBlocks--;
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// if (DEBUG) System.out.println(" skip floor block2! nextFloorLabel=" + (char) nextFloorLabel + " vs target=" + (char) transitions[transitionIndex].getMin() + " newFP=" + fp + " numFollowFloorBlocks=" + numFollowFloorBlocks);
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if (numFollowFloorBlocks != 0) {
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nextFloorLabel = floorDataReader.readByte() & 0xff;
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} else {
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nextFloorLabel = 256;
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}
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// if (DEBUG) System.out.println(" nextFloorLabel=" + (char) nextFloorLabel);
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} while (numFollowFloorBlocks != 0 && nextFloorLabel <= transitions[transitionIndex].getMin());
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load(null);
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}
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public void setState(int state) {
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this.state = state;
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transitionIndex = 0;
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transitions = compiledAutomaton.sortedTransitions[state];
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if (transitions.length != 0) {
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curTransitionMax = transitions[0].getMax();
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} else {
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curTransitionMax = -1;
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}
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}
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void load(BytesRef frameIndexData) throws IOException {
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// if (DEBUG) System.out.println(" load fp=" + fp + " fpOrig=" + fpOrig + " frameIndexData=" + frameIndexData + " trans=" + (transitions.length != 0 ? transitions[0] : "n/a" + " state=" + state));
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if (frameIndexData != null && transitions.length != 0) {
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// Floor frame
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if (floorData.length < frameIndexData.length) {
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this.floorData = new byte[ArrayUtil.oversize(frameIndexData.length, 1)];
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}
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System.arraycopy(frameIndexData.bytes, frameIndexData.offset, floorData, 0, frameIndexData.length);
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floorDataReader.reset(floorData, 0, frameIndexData.length);
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// Skip first long -- has redundant fp, hasTerms
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// flag, isFloor flag
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final long code = floorDataReader.readVLong();
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if ((code & BlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR) != 0) {
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numFollowFloorBlocks = floorDataReader.readVInt();
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nextFloorLabel = floorDataReader.readByte() & 0xff;
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// if (DEBUG) System.out.println(" numFollowFloorBlocks=" + numFollowFloorBlocks + " nextFloorLabel=" + nextFloorLabel);
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// If current state is accept, we must process
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// first block in case it has empty suffix:
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if (!runAutomaton.isAccept(state)) {
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// Maybe skip floor blocks:
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while (numFollowFloorBlocks != 0 && nextFloorLabel <= transitions[0].getMin()) {
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fp = fpOrig + (floorDataReader.readVLong() >>> 1);
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numFollowFloorBlocks--;
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// if (DEBUG) System.out.println(" skip floor block! nextFloorLabel=" + (char) nextFloorLabel + " vs target=" + (char) transitions[0].getMin() + " newFP=" + fp + " numFollowFloorBlocks=" + numFollowFloorBlocks);
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if (numFollowFloorBlocks != 0) {
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nextFloorLabel = floorDataReader.readByte() & 0xff;
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} else {
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nextFloorLabel = 256;
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}
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}
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}
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}
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}
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in.seek(fp);
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int code = in.readVInt();
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entCount = code >>> 1;
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assert entCount > 0;
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isLastInFloor = (code & 1) != 0;
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// term suffixes:
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code = in.readVInt();
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isLeafBlock = (code & 1) != 0;
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int numBytes = code >>> 1;
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// if (DEBUG) System.out.println(" entCount=" + entCount + " lastInFloor?=" + isLastInFloor + " leafBlock?=" + isLeafBlock + " numSuffixBytes=" + numBytes);
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if (suffixBytes.length < numBytes) {
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suffixBytes = new byte[ArrayUtil.oversize(numBytes, 1)];
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}
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in.readBytes(suffixBytes, 0, numBytes);
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suffixesReader.reset(suffixBytes, 0, numBytes);
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// stats
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numBytes = in.readVInt();
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if (statBytes.length < numBytes) {
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statBytes = new byte[ArrayUtil.oversize(numBytes, 1)];
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}
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in.readBytes(statBytes, 0, numBytes);
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statsReader.reset(statBytes, 0, numBytes);
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metaDataUpto = 0;
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termState.termBlockOrd = 0;
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nextEnt = 0;
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// metadata
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numBytes = in.readVInt();
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if (bytes == null) {
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bytes = new byte[ArrayUtil.oversize(numBytes, 1)];
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bytesReader = new ByteArrayDataInput();
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} else if (bytes.length < numBytes) {
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bytes = new byte[ArrayUtil.oversize(numBytes, 1)];
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}
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in.readBytes(bytes, 0, numBytes);
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bytesReader.reset(bytes, 0, numBytes);
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if (!isLastInFloor) {
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// Sub-blocks of a single floor block are always
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// written one after another -- tail recurse:
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fpEnd = in.getFilePointer();
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}
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}
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// TODO: maybe add scanToLabel; should give perf boost
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public boolean next() {
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return isLeafBlock ? nextLeaf() : nextNonLeaf();
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}
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// Decodes next entry; returns true if it's a sub-block
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public boolean nextLeaf() {
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//if (DEBUG) System.out.println(" frame.next ord=" + ord + " nextEnt=" + nextEnt + " entCount=" + entCount);
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assert nextEnt != -1 && nextEnt < entCount: "nextEnt=" + nextEnt + " entCount=" + entCount + " fp=" + fp;
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nextEnt++;
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suffix = suffixesReader.readVInt();
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startBytePos = suffixesReader.getPosition();
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suffixesReader.skipBytes(suffix);
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return false;
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}
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public boolean nextNonLeaf() {
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//if (DEBUG) System.out.println(" frame.next ord=" + ord + " nextEnt=" + nextEnt + " entCount=" + entCount);
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assert nextEnt != -1 && nextEnt < entCount: "nextEnt=" + nextEnt + " entCount=" + entCount + " fp=" + fp;
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nextEnt++;
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final int code = suffixesReader.readVInt();
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suffix = code >>> 1;
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startBytePos = suffixesReader.getPosition();
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suffixesReader.skipBytes(suffix);
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if ((code & 1) == 0) {
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// A normal term
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termState.termBlockOrd++;
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return false;
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} else {
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// A sub-block; make sub-FP absolute:
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lastSubFP = fp - suffixesReader.readVLong();
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return true;
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}
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}
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public int getTermBlockOrd() {
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return isLeafBlock ? nextEnt : termState.termBlockOrd;
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}
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public void decodeMetaData() throws IOException {
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// lazily catch up on metadata decode:
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final int limit = getTermBlockOrd();
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boolean absolute = metaDataUpto == 0;
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assert limit > 0;
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// TODO: better API would be "jump straight to term=N"???
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while (metaDataUpto < limit) {
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// TODO: we could make "tiers" of metadata, ie,
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// decode docFreq/totalTF but don't decode postings
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// metadata; this way caller could get
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// docFreq/totalTF w/o paying decode cost for
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// postings
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// TODO: if docFreq were bulk decoded we could
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// just skipN here:
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// stats
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termState.docFreq = statsReader.readVInt();
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//if (DEBUG) System.out.println(" dF=" + state.docFreq);
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if (fr.fieldInfo.getIndexOptions() != IndexOptions.DOCS_ONLY) {
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termState.totalTermFreq = termState.docFreq + statsReader.readVLong();
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//if (DEBUG) System.out.println(" totTF=" + state.totalTermFreq);
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}
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// metadata
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for (int i = 0; i < fr.longsSize; i++) {
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longs[i] = bytesReader.readVLong();
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}
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fr.parent.postingsReader.decodeTerm(longs, bytesReader, fr.fieldInfo, termState, absolute);
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metaDataUpto++;
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absolute = false;
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}
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termState.termBlockOrd = metaDataUpto;
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}
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}
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private BytesRef savedStartTerm;
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private BytesRef savedStartTerm;
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@ -329,9 +65,9 @@ final class IntersectTermsEnum extends TermsEnum {
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runAutomaton = compiled.runAutomaton;
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runAutomaton = compiled.runAutomaton;
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compiledAutomaton = compiled;
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compiledAutomaton = compiled;
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in = fr.parent.in.clone();
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in = fr.parent.in.clone();
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stack = new Frame[5];
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stack = new IntersectTermsEnumFrame[5];
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for(int idx=0;idx<stack.length;idx++) {
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for(int idx=0;idx<stack.length;idx++) {
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stack[idx] = new Frame(idx);
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stack[idx] = new IntersectTermsEnumFrame(this, idx);
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}
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}
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for(int arcIdx=0;arcIdx<arcs.length;arcIdx++) {
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for(int arcIdx=0;arcIdx<arcs.length;arcIdx++) {
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arcs[arcIdx] = new FST.Arc<>();
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arcs[arcIdx] = new FST.Arc<>();
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@ -355,7 +91,7 @@ final class IntersectTermsEnum extends TermsEnum {
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assert arc.isFinal();
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assert arc.isFinal();
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// Special pushFrame since it's the first one:
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// Special pushFrame since it's the first one:
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final Frame f = stack[0];
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final IntersectTermsEnumFrame f = stack[0];
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f.fp = f.fpOrig = fr.rootBlockFP;
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f.fp = f.fpOrig = fr.rootBlockFP;
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f.prefix = 0;
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f.prefix = 0;
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f.setState(runAutomaton.getInitialState());
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f.setState(runAutomaton.getInitialState());
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@ -384,12 +120,12 @@ final class IntersectTermsEnum extends TermsEnum {
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return currentFrame.termState.clone();
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return currentFrame.termState.clone();
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}
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}
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private Frame getFrame(int ord) throws IOException {
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private IntersectTermsEnumFrame getFrame(int ord) throws IOException {
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if (ord >= stack.length) {
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if (ord >= stack.length) {
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final Frame[] next = new Frame[ArrayUtil.oversize(1+ord, RamUsageEstimator.NUM_BYTES_OBJECT_REF)];
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final IntersectTermsEnumFrame[] next = new IntersectTermsEnumFrame[ArrayUtil.oversize(1+ord, RamUsageEstimator.NUM_BYTES_OBJECT_REF)];
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System.arraycopy(stack, 0, next, 0, stack.length);
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System.arraycopy(stack, 0, next, 0, stack.length);
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for(int stackOrd=stack.length;stackOrd<next.length;stackOrd++) {
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for(int stackOrd=stack.length;stackOrd<next.length;stackOrd++) {
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next[stackOrd] = new Frame(stackOrd);
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next[stackOrd] = new IntersectTermsEnumFrame(this, stackOrd);
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}
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}
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stack = next;
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stack = next;
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}
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}
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@ -410,8 +146,8 @@ final class IntersectTermsEnum extends TermsEnum {
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return arcs[ord];
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return arcs[ord];
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}
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}
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|
||||||
private Frame pushFrame(int state) throws IOException {
|
private IntersectTermsEnumFrame pushFrame(int state) throws IOException {
|
||||||
final Frame f = getFrame(currentFrame == null ? 0 : 1+currentFrame.ord);
|
final IntersectTermsEnumFrame f = getFrame(currentFrame == null ? 0 : 1+currentFrame.ord);
|
||||||
|
|
||||||
f.fp = f.fpOrig = currentFrame.lastSubFP;
|
f.fp = f.fpOrig = currentFrame.lastSubFP;
|
||||||
f.prefix = currentFrame.prefix + currentFrame.suffix;
|
f.prefix = currentFrame.prefix + currentFrame.suffix;
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,292 @@
|
||||||
|
package org.apache.lucene.codecs.blocktree;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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 java.io.IOException;
|
||||||
|
|
||||||
|
import org.apache.lucene.codecs.BlockTermState;
|
||||||
|
import org.apache.lucene.index.FieldInfo.IndexOptions;
|
||||||
|
import org.apache.lucene.store.ByteArrayDataInput;
|
||||||
|
import org.apache.lucene.util.ArrayUtil;
|
||||||
|
import org.apache.lucene.util.BytesRef;
|
||||||
|
import org.apache.lucene.util.automaton.Transition;
|
||||||
|
import org.apache.lucene.util.fst.FST;
|
||||||
|
|
||||||
|
// TODO: can we share this with the frame in STE?
|
||||||
|
final class IntersectTermsEnumFrame {
|
||||||
|
final int ord;
|
||||||
|
long fp;
|
||||||
|
long fpOrig;
|
||||||
|
long fpEnd;
|
||||||
|
long lastSubFP;
|
||||||
|
|
||||||
|
// State in automaton
|
||||||
|
int state;
|
||||||
|
|
||||||
|
int metaDataUpto;
|
||||||
|
|
||||||
|
byte[] suffixBytes = new byte[128];
|
||||||
|
final ByteArrayDataInput suffixesReader = new ByteArrayDataInput();
|
||||||
|
|
||||||
|
byte[] statBytes = new byte[64];
|
||||||
|
final ByteArrayDataInput statsReader = new ByteArrayDataInput();
|
||||||
|
|
||||||
|
byte[] floorData = new byte[32];
|
||||||
|
final ByteArrayDataInput floorDataReader = new ByteArrayDataInput();
|
||||||
|
|
||||||
|
// Length of prefix shared by all terms in this block
|
||||||
|
int prefix;
|
||||||
|
|
||||||
|
// Number of entries (term or sub-block) in this block
|
||||||
|
int entCount;
|
||||||
|
|
||||||
|
// Which term we will next read
|
||||||
|
int nextEnt;
|
||||||
|
|
||||||
|
// True if this block is either not a floor block,
|
||||||
|
// or, it's the last sub-block of a floor block
|
||||||
|
boolean isLastInFloor;
|
||||||
|
|
||||||
|
// True if all entries are terms
|
||||||
|
boolean isLeafBlock;
|
||||||
|
|
||||||
|
int numFollowFloorBlocks;
|
||||||
|
int nextFloorLabel;
|
||||||
|
|
||||||
|
Transition[] transitions;
|
||||||
|
int curTransitionMax;
|
||||||
|
int transitionIndex;
|
||||||
|
|
||||||
|
FST.Arc<BytesRef> arc;
|
||||||
|
|
||||||
|
final BlockTermState termState;
|
||||||
|
|
||||||
|
// metadata buffer, holding monotonic values
|
||||||
|
public long[] longs;
|
||||||
|
// metadata buffer, holding general values
|
||||||
|
public byte[] bytes;
|
||||||
|
ByteArrayDataInput bytesReader;
|
||||||
|
|
||||||
|
// Cumulative output so far
|
||||||
|
BytesRef outputPrefix;
|
||||||
|
|
||||||
|
int startBytePos;
|
||||||
|
int suffix;
|
||||||
|
|
||||||
|
private final IntersectTermsEnum ite;
|
||||||
|
|
||||||
|
public IntersectTermsEnumFrame(IntersectTermsEnum ite, int ord) throws IOException {
|
||||||
|
this.ite = ite;
|
||||||
|
this.ord = ord;
|
||||||
|
this.termState = ite.fr.parent.postingsReader.newTermState();
|
||||||
|
this.termState.totalTermFreq = -1;
|
||||||
|
this.longs = new long[ite.fr.longsSize];
|
||||||
|
}
|
||||||
|
|
||||||
|
void loadNextFloorBlock() throws IOException {
|
||||||
|
assert numFollowFloorBlocks > 0;
|
||||||
|
//if (DEBUG) System.out.println(" loadNextFoorBlock trans=" + transitions[transitionIndex]);
|
||||||
|
|
||||||
|
do {
|
||||||
|
fp = fpOrig + (floorDataReader.readVLong() >>> 1);
|
||||||
|
numFollowFloorBlocks--;
|
||||||
|
// if (DEBUG) System.out.println(" skip floor block2! nextFloorLabel=" + (char) nextFloorLabel + " vs target=" + (char) transitions[transitionIndex].getMin() + " newFP=" + fp + " numFollowFloorBlocks=" + numFollowFloorBlocks);
|
||||||
|
if (numFollowFloorBlocks != 0) {
|
||||||
|
nextFloorLabel = floorDataReader.readByte() & 0xff;
|
||||||
|
} else {
|
||||||
|
nextFloorLabel = 256;
|
||||||
|
}
|
||||||
|
// if (DEBUG) System.out.println(" nextFloorLabel=" + (char) nextFloorLabel);
|
||||||
|
} while (numFollowFloorBlocks != 0 && nextFloorLabel <= transitions[transitionIndex].getMin());
|
||||||
|
|
||||||
|
load(null);
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setState(int state) {
|
||||||
|
this.state = state;
|
||||||
|
transitionIndex = 0;
|
||||||
|
transitions = ite.compiledAutomaton.sortedTransitions[state];
|
||||||
|
if (transitions.length != 0) {
|
||||||
|
curTransitionMax = transitions[0].getMax();
|
||||||
|
} else {
|
||||||
|
curTransitionMax = -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void load(BytesRef frameIndexData) throws IOException {
|
||||||
|
|
||||||
|
// if (DEBUG) System.out.println(" load fp=" + fp + " fpOrig=" + fpOrig + " frameIndexData=" + frameIndexData + " trans=" + (transitions.length != 0 ? transitions[0] : "n/a" + " state=" + state));
|
||||||
|
|
||||||
|
if (frameIndexData != null && transitions.length != 0) {
|
||||||
|
// Floor frame
|
||||||
|
if (floorData.length < frameIndexData.length) {
|
||||||
|
this.floorData = new byte[ArrayUtil.oversize(frameIndexData.length, 1)];
|
||||||
|
}
|
||||||
|
System.arraycopy(frameIndexData.bytes, frameIndexData.offset, floorData, 0, frameIndexData.length);
|
||||||
|
floorDataReader.reset(floorData, 0, frameIndexData.length);
|
||||||
|
// Skip first long -- has redundant fp, hasTerms
|
||||||
|
// flag, isFloor flag
|
||||||
|
final long code = floorDataReader.readVLong();
|
||||||
|
if ((code & BlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR) != 0) {
|
||||||
|
numFollowFloorBlocks = floorDataReader.readVInt();
|
||||||
|
nextFloorLabel = floorDataReader.readByte() & 0xff;
|
||||||
|
// if (DEBUG) System.out.println(" numFollowFloorBlocks=" + numFollowFloorBlocks + " nextFloorLabel=" + nextFloorLabel);
|
||||||
|
|
||||||
|
// If current state is accept, we must process
|
||||||
|
// first block in case it has empty suffix:
|
||||||
|
if (!ite.runAutomaton.isAccept(state)) {
|
||||||
|
// Maybe skip floor blocks:
|
||||||
|
while (numFollowFloorBlocks != 0 && nextFloorLabel <= transitions[0].getMin()) {
|
||||||
|
fp = fpOrig + (floorDataReader.readVLong() >>> 1);
|
||||||
|
numFollowFloorBlocks--;
|
||||||
|
// if (DEBUG) System.out.println(" skip floor block! nextFloorLabel=" + (char) nextFloorLabel + " vs target=" + (char) transitions[0].getMin() + " newFP=" + fp + " numFollowFloorBlocks=" + numFollowFloorBlocks);
|
||||||
|
if (numFollowFloorBlocks != 0) {
|
||||||
|
nextFloorLabel = floorDataReader.readByte() & 0xff;
|
||||||
|
} else {
|
||||||
|
nextFloorLabel = 256;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
ite.in.seek(fp);
|
||||||
|
int code = ite.in.readVInt();
|
||||||
|
entCount = code >>> 1;
|
||||||
|
assert entCount > 0;
|
||||||
|
isLastInFloor = (code & 1) != 0;
|
||||||
|
|
||||||
|
// term suffixes:
|
||||||
|
code = ite.in.readVInt();
|
||||||
|
isLeafBlock = (code & 1) != 0;
|
||||||
|
int numBytes = code >>> 1;
|
||||||
|
// if (DEBUG) System.out.println(" entCount=" + entCount + " lastInFloor?=" + isLastInFloor + " leafBlock?=" + isLeafBlock + " numSuffixBytes=" + numBytes);
|
||||||
|
if (suffixBytes.length < numBytes) {
|
||||||
|
suffixBytes = new byte[ArrayUtil.oversize(numBytes, 1)];
|
||||||
|
}
|
||||||
|
ite.in.readBytes(suffixBytes, 0, numBytes);
|
||||||
|
suffixesReader.reset(suffixBytes, 0, numBytes);
|
||||||
|
|
||||||
|
// stats
|
||||||
|
numBytes = ite.in.readVInt();
|
||||||
|
if (statBytes.length < numBytes) {
|
||||||
|
statBytes = new byte[ArrayUtil.oversize(numBytes, 1)];
|
||||||
|
}
|
||||||
|
ite.in.readBytes(statBytes, 0, numBytes);
|
||||||
|
statsReader.reset(statBytes, 0, numBytes);
|
||||||
|
metaDataUpto = 0;
|
||||||
|
|
||||||
|
termState.termBlockOrd = 0;
|
||||||
|
nextEnt = 0;
|
||||||
|
|
||||||
|
// metadata
|
||||||
|
numBytes = ite.in.readVInt();
|
||||||
|
if (bytes == null) {
|
||||||
|
bytes = new byte[ArrayUtil.oversize(numBytes, 1)];
|
||||||
|
bytesReader = new ByteArrayDataInput();
|
||||||
|
} else if (bytes.length < numBytes) {
|
||||||
|
bytes = new byte[ArrayUtil.oversize(numBytes, 1)];
|
||||||
|
}
|
||||||
|
ite.in.readBytes(bytes, 0, numBytes);
|
||||||
|
bytesReader.reset(bytes, 0, numBytes);
|
||||||
|
|
||||||
|
if (!isLastInFloor) {
|
||||||
|
// Sub-blocks of a single floor block are always
|
||||||
|
// written one after another -- tail recurse:
|
||||||
|
fpEnd = ite.in.getFilePointer();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// TODO: maybe add scanToLabel; should give perf boost
|
||||||
|
|
||||||
|
public boolean next() {
|
||||||
|
return isLeafBlock ? nextLeaf() : nextNonLeaf();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Decodes next entry; returns true if it's a sub-block
|
||||||
|
public boolean nextLeaf() {
|
||||||
|
//if (DEBUG) System.out.println(" frame.next ord=" + ord + " nextEnt=" + nextEnt + " entCount=" + entCount);
|
||||||
|
assert nextEnt != -1 && nextEnt < entCount: "nextEnt=" + nextEnt + " entCount=" + entCount + " fp=" + fp;
|
||||||
|
nextEnt++;
|
||||||
|
suffix = suffixesReader.readVInt();
|
||||||
|
startBytePos = suffixesReader.getPosition();
|
||||||
|
suffixesReader.skipBytes(suffix);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
public boolean nextNonLeaf() {
|
||||||
|
//if (DEBUG) System.out.println(" frame.next ord=" + ord + " nextEnt=" + nextEnt + " entCount=" + entCount);
|
||||||
|
assert nextEnt != -1 && nextEnt < entCount: "nextEnt=" + nextEnt + " entCount=" + entCount + " fp=" + fp;
|
||||||
|
nextEnt++;
|
||||||
|
final int code = suffixesReader.readVInt();
|
||||||
|
suffix = code >>> 1;
|
||||||
|
startBytePos = suffixesReader.getPosition();
|
||||||
|
suffixesReader.skipBytes(suffix);
|
||||||
|
if ((code & 1) == 0) {
|
||||||
|
// A normal term
|
||||||
|
termState.termBlockOrd++;
|
||||||
|
return false;
|
||||||
|
} else {
|
||||||
|
// A sub-block; make sub-FP absolute:
|
||||||
|
lastSubFP = fp - suffixesReader.readVLong();
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getTermBlockOrd() {
|
||||||
|
return isLeafBlock ? nextEnt : termState.termBlockOrd;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void decodeMetaData() throws IOException {
|
||||||
|
|
||||||
|
// lazily catch up on metadata decode:
|
||||||
|
final int limit = getTermBlockOrd();
|
||||||
|
boolean absolute = metaDataUpto == 0;
|
||||||
|
assert limit > 0;
|
||||||
|
|
||||||
|
// TODO: better API would be "jump straight to term=N"???
|
||||||
|
while (metaDataUpto < limit) {
|
||||||
|
|
||||||
|
// TODO: we could make "tiers" of metadata, ie,
|
||||||
|
// decode docFreq/totalTF but don't decode postings
|
||||||
|
// metadata; this way caller could get
|
||||||
|
// docFreq/totalTF w/o paying decode cost for
|
||||||
|
// postings
|
||||||
|
|
||||||
|
// TODO: if docFreq were bulk decoded we could
|
||||||
|
// just skipN here:
|
||||||
|
|
||||||
|
// stats
|
||||||
|
termState.docFreq = statsReader.readVInt();
|
||||||
|
//if (DEBUG) System.out.println(" dF=" + state.docFreq);
|
||||||
|
if (ite.fr.fieldInfo.getIndexOptions() != IndexOptions.DOCS_ONLY) {
|
||||||
|
termState.totalTermFreq = termState.docFreq + statsReader.readVLong();
|
||||||
|
//if (DEBUG) System.out.println(" totTF=" + state.totalTermFreq);
|
||||||
|
}
|
||||||
|
// metadata
|
||||||
|
for (int i = 0; i < ite.fr.longsSize; i++) {
|
||||||
|
longs[i] = bytesReader.readVLong();
|
||||||
|
}
|
||||||
|
ite.fr.parent.postingsReader.decodeTerm(longs, bytesReader, ite.fr.fieldInfo, termState, absolute);
|
||||||
|
|
||||||
|
metaDataUpto++;
|
||||||
|
absolute = false;
|
||||||
|
}
|
||||||
|
termState.termBlockOrd = metaDataUpto;
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue