MtasSpanMaximumExpandQuery.java.html 19.4 KB

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<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><link rel="stylesheet" href="../jacoco-resources/report.css" type="text/css"/><link rel="shortcut icon" href="../jacoco-resources/report.gif" type="image/gif"/><title>MtasSpanMaximumExpandQuery.java</title><link rel="stylesheet" href="../jacoco-resources/prettify.css" type="text/css"/><script type="text/javascript" src="../jacoco-resources/prettify.js"></script></head><body onload="window['PR_TAB_WIDTH']=4;prettyPrint()"><div class="breadcrumb" id="breadcrumb"><span class="info"><a href="../jacoco-sessions.html" class="el_session">Sessions</a></span><a href="../index.html" class="el_report">MTAS</a> &gt; <a href="index.source.html" class="el_package">mtas.search.spans.util</a> &gt; <span class="el_source">MtasSpanMaximumExpandQuery.java</span></div><h1>MtasSpanMaximumExpandQuery.java</h1><pre class="source lang-java linenums">package mtas.search.spans.util;

import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.Set;

import org.apache.lucene.codecs.FieldsProducer;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermContext;
import org.apache.lucene.index.Terms;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TwoPhaseIterator;
import org.apache.lucene.search.spans.SpanCollector;
import org.apache.lucene.search.spans.SpanWeight;
import org.apache.lucene.search.spans.Spans;

import mtas.codec.util.CodecInfo;
import mtas.codec.util.CodecInfo.IndexDoc;
import mtas.search.spans.MtasSpanMatchNoneSpans;

/**
 * The Class MtasSpanMaximumExpandQuery.
 */
public class MtasSpanMaximumExpandQuery extends MtasSpanQuery {

  /** The query. */
  MtasSpanQuery query;

  /** The minimum left. */
  int minimumLeft;

  /** The maximum left. */
  int maximumLeft;

  /** The minimum right. */
  int minimumRight;

  /** The maximum right. */
  int maximumRight;

  /**
   * Instantiates a new mtas span maximum expand query.
   *
   * @param query the query
   * @param minimumLeft the minimum left
   * @param maximumLeft the maximum left
   * @param minimumRight the minimum right
   * @param maximumRight the maximum right
   */
  public MtasSpanMaximumExpandQuery(MtasSpanQuery query, int minimumLeft,
      int maximumLeft, int minimumRight, int maximumRight) {
<span class="fc" id="L56">    super(null, null);</span>
<span class="fc" id="L57">    this.query = query;</span>
<span class="pc bpc" id="L58" title="4 of 8 branches missed.">    if (minimumLeft &gt; maximumLeft || minimumRight &gt; maximumRight</span>
        || minimumLeft &lt; 0 || minimumRight &lt; 0) {
<span class="nc" id="L60">      throw new IllegalArgumentException();</span>
    }
<span class="fc" id="L62">    this.minimumLeft = minimumLeft;</span>
<span class="fc" id="L63">    this.maximumLeft = maximumLeft;</span>
<span class="fc" id="L64">    this.minimumRight = minimumRight;</span>
<span class="fc" id="L65">    this.maximumRight = maximumRight;</span>
<span class="fc" id="L66">    Integer minimum = query.getMinimumWidth();</span>
<span class="fc" id="L67">    Integer maximum = query.getMaximumWidth();</span>
<span class="fc bfc" id="L68" title="All 2 branches covered.">    if (minimum != null) {</span>
<span class="fc" id="L69">      minimum += minimumLeft + minimumRight;</span>
    }
<span class="pc bpc" id="L71" title="1 of 2 branches missed.">    if (maximum != null) {</span>
<span class="nc" id="L72">      maximum += maximumLeft + maximumRight;</span>
    }
<span class="fc" id="L74">    setWidth(minimum, maximum);</span>
<span class="fc" id="L75">  }</span>

  /* (non-Javadoc)
   * @see mtas.search.spans.util.MtasSpanQuery#createWeight(org.apache.lucene.search.IndexSearcher, boolean)
   */
  @Override
  public SpanWeight createWeight(IndexSearcher searcher, boolean needsScores)
      throws IOException {
<span class="nc" id="L83">    SpanWeight subWeight = query.createWeight(searcher, needsScores);</span>
<span class="nc bnc" id="L84" title="All 4 branches missed.">    if (maximumLeft == 0 &amp;&amp; maximumRight == 0) {</span>
<span class="nc" id="L85">      return subWeight;</span>
    } else {
<span class="nc" id="L87">      return new MtasMaximumExpandWeight(subWeight, searcher, needsScores);</span>
    }
  }

  /* (non-Javadoc)
   * @see org.apache.lucene.search.spans.SpanQuery#getField()
   */
  @Override
  public String getField() {
<span class="fc" id="L96">    return query.getField();</span>
  }

  /* (non-Javadoc)
   * @see org.apache.lucene.search.Query#toString(java.lang.String)
   */
  @Override
  public String toString(String field) {
<span class="nc" id="L104">    StringBuilder buffer = new StringBuilder();</span>
<span class="nc" id="L105">    buffer.append(this.getClass().getSimpleName() + &quot;([&quot;);</span>
<span class="nc" id="L106">    buffer.append(query.toString(field) + &quot;][&quot;+minimumLeft+&quot;,&quot;+maximumLeft+&quot;][&quot;+minimumRight+&quot;,&quot;+maximumRight+&quot;])&quot;);</span>
<span class="nc" id="L107">    return buffer.toString();</span>
  }

  /* (non-Javadoc)
   * @see org.apache.lucene.search.Query#equals(java.lang.Object)
   */
  @Override
  public boolean equals(Object obj) {
<span class="pc bpc" id="L115" title="1 of 2 branches missed.">    if (this == obj)</span>
<span class="nc" id="L116">      return true;</span>
<span class="pc bpc" id="L117" title="1 of 2 branches missed.">    if (obj == null)</span>
<span class="nc" id="L118">      return false;</span>
<span class="pc bpc" id="L119" title="1 of 2 branches missed.">    if (getClass() != obj.getClass())</span>
<span class="nc" id="L120">      return false;</span>
<span class="fc" id="L121">    final MtasSpanMaximumExpandQuery that = (MtasSpanMaximumExpandQuery) obj;</span>
    boolean isEqual;
<span class="fc" id="L123">    isEqual = query.equals(that.query);</span>
<span class="pc bpc" id="L124" title="1 of 2 branches missed.">    isEqual &amp;= minimumLeft == that.minimumLeft;</span>
<span class="pc bpc" id="L125" title="1 of 2 branches missed.">    isEqual &amp;= maximumLeft == that.maximumLeft;</span>
<span class="pc bpc" id="L126" title="1 of 2 branches missed.">    isEqual &amp;= minimumRight == that.minimumRight;</span>
<span class="pc bpc" id="L127" title="1 of 2 branches missed.">    isEqual &amp;= maximumRight == that.maximumRight;</span>
<span class="fc" id="L128">    return isEqual;</span>
  }

  /* (non-Javadoc)
   * @see org.apache.lucene.search.Query#hashCode()
   */
  @Override
  public int hashCode() {
<span class="nc" id="L136">    int h = Integer.rotateLeft(classHash(), 1);</span>
<span class="nc" id="L137">    h ^= query.hashCode();</span>
<span class="nc" id="L138">    h = Integer.rotateLeft(h, minimumLeft) + minimumLeft;</span>
<span class="nc" id="L139">    h ^= 2;</span>
<span class="nc" id="L140">    h = Integer.rotateLeft(h, maximumLeft) + maximumLeft;</span>
<span class="nc" id="L141">    h ^= 3;</span>
<span class="nc" id="L142">    h = Integer.rotateLeft(h, minimumRight) + minimumRight;</span>
<span class="nc" id="L143">    h ^= 5;</span>
<span class="nc" id="L144">    h = Integer.rotateLeft(h, maximumRight) + maximumRight;</span>
<span class="nc" id="L145">    return h;</span>
  }

  /* (non-Javadoc)
   * @see mtas.search.spans.util.MtasSpanQuery#rewrite(org.apache.lucene.index.IndexReader)
   */
  @Override
  public MtasSpanQuery rewrite(IndexReader reader) throws IOException {
<span class="fc" id="L153">    MtasSpanQuery newQuery = query.rewrite(reader);</span>
<span class="pc bpc" id="L154" title="2 of 4 branches missed.">    if (maximumLeft == 0 &amp;&amp; maximumRight == 0) {</span>
<span class="fc" id="L155">      return newQuery;</span>
<span class="nc bnc" id="L156" title="All 2 branches missed.">    } else if (!query.equals(newQuery)) {</span>
<span class="nc" id="L157">      return new MtasSpanMaximumExpandQuery(newQuery, minimumLeft, maximumLeft,</span>
          minimumRight, maximumRight);
    } else {
<span class="nc" id="L160">      return super.rewrite(reader);</span>
    }
  }

  /**
   * The Class MtasMaximumExpandWeight.
   */
  private class MtasMaximumExpandWeight extends SpanWeight {

    /** The sub weight. */
    SpanWeight subWeight;

    /**
     * Instantiates a new mtas maximum expand weight.
     *
     * @param subWeight the sub weight
     * @param searcher the searcher
     * @param needsScores the needs scores
     * @throws IOException Signals that an I/O exception has occurred.
     */
    public MtasMaximumExpandWeight(SpanWeight subWeight, IndexSearcher searcher,
<span class="nc" id="L181">        boolean needsScores) throws IOException {</span>
<span class="nc bnc" id="L182" title="All 2 branches missed.">      super(MtasSpanMaximumExpandQuery.this, searcher,</span>
<span class="nc" id="L183">          needsScores ? getTermContexts(subWeight) : null);</span>
<span class="nc" id="L184">      this.subWeight = subWeight;</span>
<span class="nc" id="L185">    }</span>

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.SpanWeight#extractTermContexts(java.util.Map)
     */
    @Override
    public void extractTermContexts(Map&lt;Term, TermContext&gt; contexts) {
<span class="nc" id="L192">      subWeight.extractTermContexts(contexts);</span>
<span class="nc" id="L193">    }</span>

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.SpanWeight#getSpans(org.apache.lucene.index.LeafReaderContext, org.apache.lucene.search.spans.SpanWeight.Postings)
     */
    @Override
    public Spans getSpans(LeafReaderContext ctx, Postings requiredPostings)
        throws IOException {
<span class="nc" id="L201">      Spans spans = subWeight.getSpans(ctx, requiredPostings);</span>
<span class="nc bnc" id="L202" title="All 4 branches missed.">      if (maximumLeft == 0 &amp;&amp; maximumRight == 0) {</span>
<span class="nc" id="L203">        return spans;</span>
      } else {
        try {
          // get leafreader
<span class="nc" id="L207">          LeafReader r = ctx.reader();</span>
          // get delegate
<span class="nc" id="L209">          Boolean hasMethod = true;</span>
<span class="nc bnc" id="L210" title="All 2 branches missed.">          while (hasMethod) {</span>
<span class="nc" id="L211">            hasMethod = false;</span>
<span class="nc" id="L212">            Method[] methods = r.getClass().getMethods();</span>
<span class="nc bnc" id="L213" title="All 2 branches missed.">            for (Method m : methods) {</span>
<span class="nc bnc" id="L214" title="All 2 branches missed.">              if (m.getName().equals(&quot;getDelegate&quot;)) {</span>
<span class="nc" id="L215">                hasMethod = true;</span>
<span class="nc" id="L216">                r = (LeafReader) m.invoke(r, (Object[]) null);</span>
<span class="nc" id="L217">                break;</span>
              }
            }
<span class="nc" id="L220">          } // get fieldsproducer</span>
<span class="nc" id="L221">          Method fpm = r.getClass().getMethod(&quot;getPostingsReader&quot;,</span>
              (Class&lt;?&gt;[]) null);
<span class="nc" id="L223">          FieldsProducer fp = (FieldsProducer) fpm.invoke(r, (Object[]) null);</span>
          // get MtasFieldsProducer using terms
<span class="nc" id="L225">          Terms t = fp.terms(field);</span>
<span class="nc bnc" id="L226" title="All 2 branches missed.">          if (t == null) {</span>
<span class="nc" id="L227">            return new MtasSpanMatchNoneSpans(field);</span>
          } else {
<span class="nc" id="L229">            CodecInfo mtasCodecInfo = CodecInfo.getCodecInfoFromTerms(t);</span>
<span class="nc" id="L230">            return new MtasMaximumExpandSpans(mtasCodecInfo, query.getField(),</span>
                spans);
          }
<span class="nc" id="L233">        } catch (Exception e) {</span>
<span class="nc" id="L234">          throw new IOException(&quot;Can't get reader&quot;, e);</span>
        }

      }
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.Weight#extractTerms(java.util.Set)
     */
    @Override
    public void extractTerms(Set&lt;Term&gt; terms) {
<span class="nc" id="L245">      subWeight.extractTerms(terms);</span>
<span class="nc" id="L246">    }</span>

  }

  /**
   * The Class MtasMaximumExpandSpans.
   */
  private class MtasMaximumExpandSpans extends Spans {

    /** The sub spans. */
    Spans subSpans;

    /** The min position. */
    int minPosition;

    /** The max position. */
    int maxPosition;

    /** The field. */
    String field;

    /** The mtas codec info. */
    CodecInfo mtasCodecInfo;

    /** The start position. */
    int startPosition;

    /** The end position. */
    int endPosition;

    /**
     * Instantiates a new mtas maximum expand spans.
     *
     * @param mtasCodecInfo the mtas codec info
     * @param field the field
     * @param subSpans the sub spans
     */
    public MtasMaximumExpandSpans(CodecInfo mtasCodecInfo, String field,
<span class="nc" id="L284">        Spans subSpans) {</span>
<span class="nc" id="L285">      super();</span>
<span class="nc" id="L286">      this.subSpans = subSpans;</span>
<span class="nc" id="L287">      this.field = field;</span>
<span class="nc" id="L288">      this.mtasCodecInfo = mtasCodecInfo;</span>
<span class="nc" id="L289">      this.minPosition = 0;</span>
<span class="nc" id="L290">      this.maxPosition = 0;</span>
<span class="nc" id="L291">      this.startPosition = -1;</span>
<span class="nc" id="L292">      this.endPosition = -1;</span>
<span class="nc" id="L293">    }</span>

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#nextStartPosition()
     */
    @Override
    public int nextStartPosition() throws IOException {
      int basicStartPosition;
      int basicEndPosition;
<span class="nc" id="L302">      while ((basicStartPosition = subSpans</span>
<span class="nc bnc" id="L303" title="All 2 branches missed.">          .nextStartPosition()) != NO_MORE_POSITIONS) {</span>
<span class="nc" id="L304">        basicEndPosition = subSpans.endPosition();</span>
<span class="nc" id="L305">        startPosition = Math.max(minPosition,</span>
            (basicStartPosition - maximumLeft));
<span class="nc" id="L307">        endPosition = Math.min(maxPosition + 1,</span>
            (basicEndPosition + maximumRight));
<span class="nc bnc" id="L309" title="All 4 branches missed.">        if (startPosition &lt;= (basicStartPosition - minimumLeft)</span>
            &amp;&amp; endPosition &gt;= (basicEndPosition + minimumRight)) {
<span class="nc" id="L311">          return this.startPosition;</span>
        }
      }
<span class="nc" id="L314">      startPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L315">      endPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L316">      return NO_MORE_POSITIONS;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#startPosition()
     */
    @Override
    public int startPosition() {
<span class="nc" id="L324">      return startPosition;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#endPosition()
     */
    @Override
    public int endPosition() {
<span class="nc" id="L332">      return endPosition;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#width()
     */
    @Override
    public int width() {
<span class="nc" id="L340">      return endPosition-startPosition;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#collect(org.apache.lucene.search.spans.SpanCollector)
     */
    @Override
    public void collect(SpanCollector collector) throws IOException {
<span class="nc" id="L348">      subSpans.collect(collector);</span>
<span class="nc" id="L349">    }</span>

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#asTwoPhaseIterator()
     */
    @Override
    public final TwoPhaseIterator asTwoPhaseIterator() {
      // return subSpans.asTwoPhaseIterator();
<span class="nc" id="L357">      return null;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.spans.Spans#positionsCost()
     */
    @Override
    public float positionsCost() {
      //return subSpans.positionsCost();
<span class="nc" id="L366">      return 0;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.DocIdSetIterator#docID()
     */
    @Override
    public int docID() {
<span class="nc" id="L374">      return subSpans.docID();</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.DocIdSetIterator#nextDoc()
     */
    @Override
    public int nextDoc() throws IOException {
<span class="nc" id="L382">      int docId = subSpans.nextDoc();</span>
<span class="nc" id="L383">      startPosition = -1;</span>
<span class="nc" id="L384">      endPosition = -1;</span>
<span class="nc bnc" id="L385" title="All 2 branches missed.">      if (docId != NO_MORE_DOCS) {</span>
<span class="nc" id="L386">        IndexDoc doc = mtasCodecInfo.getDoc(field, docId);</span>
<span class="nc bnc" id="L387" title="All 2 branches missed.">        if (doc != null) {</span>
<span class="nc" id="L388">          minPosition = doc.minPosition;</span>
<span class="nc" id="L389">          maxPosition = doc.maxPosition;</span>
        } else {
<span class="nc" id="L391">          minPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L392">          maxPosition = NO_MORE_POSITIONS;</span>
        }
<span class="nc" id="L394">      } else {</span>
<span class="nc" id="L395">        minPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L396">        maxPosition = NO_MORE_POSITIONS;</span>
      }
<span class="nc" id="L398">      return docId;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.DocIdSetIterator#advance(int)
     */
    @Override
    public int advance(int target) throws IOException {
<span class="nc" id="L406">      int docId = subSpans.advance(target);</span>
<span class="nc" id="L407">      startPosition = -1;</span>
<span class="nc" id="L408">      endPosition = -1;</span>
<span class="nc bnc" id="L409" title="All 2 branches missed.">      if (docId != NO_MORE_DOCS) {</span>
<span class="nc" id="L410">        IndexDoc doc = mtasCodecInfo.getDoc(field, docId);</span>
<span class="nc bnc" id="L411" title="All 2 branches missed.">        if (doc != null) {</span>
<span class="nc" id="L412">          minPosition = doc.minPosition;</span>
<span class="nc" id="L413">          maxPosition = doc.maxPosition;</span>
        } else {
<span class="nc" id="L415">          minPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L416">          maxPosition = NO_MORE_POSITIONS;</span>
        }
<span class="nc" id="L418">      } else {</span>
<span class="nc" id="L419">        minPosition = NO_MORE_POSITIONS;</span>
<span class="nc" id="L420">        maxPosition = NO_MORE_POSITIONS;</span>
      }
<span class="nc" id="L422">      return docId;</span>
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.search.DocIdSetIterator#cost()
     */
    @Override
    public long cost() {
<span class="nc bnc" id="L430" title="All 2 branches missed.">      return subSpans!=null?subSpans.cost():0;</span>
    }
  }

}
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