dariah / mtas

MtasSpanSequenceQuery.java.html 21.6 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>MtasSpanSequenceQuery.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</a> &gt; <span class="el_source">MtasSpanSequenceQuery.java</span></div><h1>MtasSpanSequenceQuery.java</h1><pre class="source lang-java linenums">package mtas.search.spans;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.lucene.index.IndexReader;
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.spans.SpanWeight;
import org.apache.lucene.search.spans.Spans;

import mtas.search.spans.util.MtasIgnoreItem;
import mtas.search.spans.util.MtasSpanQuery;
import mtas.search.spans.util.MtasSpanWeight;
import mtas.search.spans.util.MtasSpans;

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

  /** The items. */
  private List&lt;MtasSpanSequenceItem&gt; items;

  /** The ignore query. */
  private MtasSpanQuery ignoreQuery;

  /** The maximum ignore length. */
  private Integer maximumIgnoreLength;

  /** The field. */
  private String field;

  /**
   * Instantiates a new mtas span sequence query.
   *
   * @param items the items
   * @param ignoreQuery the ignore query
   * @param maximumIgnoreLength the maximum ignore length
   */
  public MtasSpanSequenceQuery(List&lt;MtasSpanSequenceItem&gt; items,
      MtasSpanQuery ignoreQuery, Integer maximumIgnoreLength) {
<span class="fc" id="L50">    super(null, null);</span>
<span class="fc" id="L51">    Integer minimum = 0;</span>
<span class="fc" id="L52">    Integer maximum = 0;</span>
<span class="fc" id="L53">    this.items = items;</span>
    // get field and do checks
<span class="fc bfc" id="L55" title="All 2 branches covered.">    for (MtasSpanSequenceItem item : items) {</span>
<span class="fc bfc" id="L56" title="All 2 branches covered.">      if (field == null) {</span>
<span class="fc" id="L57">        field = item.getQuery().getField();</span>
<span class="pc bpc" id="L58" title="1 of 2 branches missed.">      } else if (item.getQuery().getField() != null</span>
<span class="pc bpc" id="L59" title="1 of 2 branches missed.">          &amp;&amp; !item.getQuery().getField().equals(field)) {</span>
<span class="nc" id="L60">        throw new IllegalArgumentException(&quot;Clauses must have same field.&quot;);</span>
      }
<span class="fc bfc" id="L62" title="All 4 branches covered.">      if (minimum != null &amp;&amp; !item.isOptional()) {</span>
<span class="fc bfc" id="L63" title="All 2 branches covered.">        minimum = item.getQuery().getMinimumWidth() != null</span>
<span class="fc" id="L64">            ? minimum + item.getQuery().getMinimumWidth() : null;</span>
      }
<span class="fc bfc" id="L66" title="All 2 branches covered.">      if (maximum != null) {</span>
<span class="fc bfc" id="L67" title="All 2 branches covered.">        maximum = item.getQuery().getMaximumWidth() != null</span>
<span class="fc" id="L68">            ? maximum + item.getQuery().getMaximumWidth() : null;</span>
      }
<span class="fc" id="L70">    }</span>
    // check ignore
<span class="pc bpc" id="L72" title="1 of 4 branches missed.">    if (field != null &amp;&amp; ignoreQuery != null) {</span>
<span class="pc bpc" id="L73" title="1 of 2 branches missed.">      if (ignoreQuery.getField() == null</span>
<span class="pc bpc" id="L74" title="1 of 2 branches missed.">          || field.equals(ignoreQuery.getField())) {</span>
<span class="fc" id="L75">        this.ignoreQuery = ignoreQuery;</span>
<span class="pc bpc" id="L76" title="1 of 2 branches missed.">        if (maximumIgnoreLength == null) {</span>
<span class="nc" id="L77">          this.maximumIgnoreLength = MtasIgnoreItem.DEFAULT_MAXIMUM_IGNORE_LENGTH;</span>
        } else {
<span class="fc" id="L79">          this.maximumIgnoreLength = maximumIgnoreLength;</span>
        }
      } else {
<span class="nc" id="L82">        throw new IllegalArgumentException(</span>
            &quot;ignore must have same field as clauses&quot;);
      }
<span class="pc bpc" id="L85" title="2 of 4 branches missed.">      if (maximum != null &amp;&amp; items.size() &gt; 1) {</span>
<span class="pc bpc" id="L86" title="1 of 2 branches missed.">        if (this.ignoreQuery.getMaximumWidth() != null) {</span>
<span class="fc" id="L87">          maximum += (items.size() - 1) * this.maximumIgnoreLength</span>
<span class="fc" id="L88">              * this.ignoreQuery.getMaximumWidth();</span>
        } else {
<span class="nc" id="L90">          maximum = null;</span>
        }
      }
    } else {
<span class="fc" id="L94">      this.ignoreQuery = null;</span>
<span class="fc" id="L95">      this.maximumIgnoreLength = null;</span>
    }
<span class="fc" id="L97">    setWidth(minimum, maximum);</span>
<span class="fc" id="L98">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.SpanQuery#getField()
   */
  @Override
  public String getField() {
<span class="fc" id="L107">    return field;</span>
  }

  /**
   * Gets the items.
   *
   * @return the items
   */
  public List&lt;MtasSpanSequenceItem&gt; getItems() {
<span class="fc" id="L116">    return items;</span>
  }

  /**
   * Gets the ignore query.
   *
   * @return the ignore query
   */
  public MtasSpanQuery getIgnoreQuery() {
<span class="fc" id="L125">    return ignoreQuery;</span>
  }

  /**
   * Gets the maximum ignore length.
   *
   * @return the maximum ignore length
   */
  public Integer getMaximumIgnoreLength() {
<span class="nc" id="L134">    return maximumIgnoreLength;</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * org.apache.lucene.search.Query#rewrite(org.apache.lucene.index.IndexReader)
   */
  @Override
  public MtasSpanQuery rewrite(IndexReader reader) throws IOException {
<span class="fc bfc" id="L145" title="All 2 branches covered.">    if (items.size() == 1) {</span>
<span class="fc" id="L146">      return items.get(0).getQuery().rewrite(reader);</span>
    } else {
      MtasSpanSequenceItem newItem;
<span class="fc" id="L149">      MtasSpanSequenceItem previousNewItem = null;</span>
<span class="fc" id="L150">      ArrayList&lt;MtasSpanSequenceItem&gt; newItems = new ArrayList&lt;&gt;(items.size());</span>
<span class="fc bfc" id="L151" title="All 2 branches covered.">      MtasSpanQuery newIgnoreClause = ignoreQuery != null</span>
<span class="fc" id="L152">          ? ignoreQuery.rewrite(reader) : null;</span>
<span class="fc bfc" id="L153" title="All 2 branches covered.">      boolean actuallyRewritten = ignoreQuery != null</span>
<span class="fc bfc" id="L154" title="All 2 branches covered.">          ? !newIgnoreClause.equals(ignoreQuery) : false;</span>
<span class="fc bfc" id="L155" title="All 2 branches covered.">      for (int i = 0; i &lt; items.size(); i++) {</span>
<span class="fc" id="L156">        newItem = items.get(i).rewrite(reader);</span>
<span class="pc bpc" id="L157" title="1 of 2 branches missed.">        if (newItem.getQuery() instanceof MtasSpanMatchNoneQuery) {</span>
<span class="nc bnc" id="L158" title="All 2 branches missed.">          if (!newItem.isOptional()) {</span>
<span class="nc" id="L159">            return new MtasSpanMatchNoneQuery(field);</span>
          } else {
<span class="nc" id="L161">            actuallyRewritten = true;</span>
          }
        } else {
<span class="fc bfc" id="L164" title="All 2 branches covered.">          actuallyRewritten |= !items.get(i).equals(newItem);</span>
<span class="fc" id="L165">          MtasSpanSequenceItem previousMergedItem = MtasSpanSequenceItem.merge(</span>
              previousNewItem, newItem, ignoreQuery, maximumIgnoreLength);
<span class="pc bpc" id="L167" title="1 of 2 branches missed.">          if (previousMergedItem != null) {</span>
<span class="nc" id="L168">            newItems.set((newItems.size() - 1), previousMergedItem);</span>
<span class="nc" id="L169">            actuallyRewritten = true;</span>
          } else {
<span class="fc" id="L171">            newItems.add(newItem);</span>
          }
<span class="fc" id="L173">          previousNewItem = newItem;</span>
        }
      }
<span class="fc bfc" id="L176" title="All 2 branches covered.">      if (!actuallyRewritten) {</span>
<span class="fc" id="L177">        return super.rewrite(reader);</span>
      } else {
<span class="pc bpc" id="L179" title="1 of 2 branches missed.">        if (!newItems.isEmpty()) {</span>
<span class="fc" id="L180">          return new MtasSpanSequenceQuery(newItems, newIgnoreClause,</span>
<span class="fc" id="L181">              maximumIgnoreLength).rewrite(reader);</span>
        } else {
<span class="nc" id="L183">          return new MtasSpanMatchNoneQuery(field);</span>
        }
      }
    }
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.Query#toString(java.lang.String)
   */
  @Override
  public String toString(String field) {
<span class="nc" id="L196">    StringBuilder buffer = new StringBuilder();</span>
<span class="nc" id="L197">    buffer.append(this.getClass().getSimpleName() + &quot;([&quot;);</span>
<span class="nc" id="L198">    Iterator&lt;MtasSpanSequenceItem&gt; i = items.iterator();</span>
<span class="nc bnc" id="L199" title="All 2 branches missed.">    while (i.hasNext()) {</span>
<span class="nc" id="L200">      MtasSpanSequenceItem item = i.next();</span>
<span class="nc" id="L201">      MtasSpanQuery clause = item.getQuery();</span>
<span class="nc" id="L202">      buffer.append(clause.toString(field));</span>
<span class="nc bnc" id="L203" title="All 2 branches missed.">      if (item.isOptional()) {</span>
<span class="nc" id="L204">        buffer.append(&quot;{OPTIONAL}&quot;);</span>
      }
<span class="nc bnc" id="L206" title="All 2 branches missed.">      if (i.hasNext()) {</span>
<span class="nc" id="L207">        buffer.append(&quot;, &quot;);</span>
      }
<span class="nc" id="L209">    }</span>
<span class="nc" id="L210">    buffer.append(&quot;]&quot;);</span>
<span class="nc" id="L211">    buffer.append(&quot;, &quot;);</span>
<span class="nc" id="L212">    buffer.append(ignoreQuery);</span>
<span class="nc" id="L213">    buffer.append(&quot;)&quot;);</span>
<span class="nc" id="L214">    return buffer.toString();</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.Query#equals(java.lang.Object)
   */
  @Override
  public boolean equals(Object obj) {
<span class="fc bfc" id="L224" title="All 2 branches covered.">    if (this == obj)</span>
<span class="fc" id="L225">      return true;</span>
<span class="pc bpc" id="L226" title="1 of 2 branches missed.">    if (obj == null)</span>
<span class="nc" id="L227">      return false;</span>
<span class="fc bfc" id="L228" title="All 2 branches covered.">    if (getClass() != obj.getClass())</span>
<span class="fc" id="L229">      return false;</span>
<span class="fc" id="L230">    MtasSpanSequenceQuery other = (MtasSpanSequenceQuery) obj;</span>
<span class="pc bpc" id="L231" title="7 of 12 branches missed.">    return field.equals(other.field) &amp;&amp; items.equals(other.items)</span>
        &amp;&amp; ((ignoreQuery == null &amp;&amp; other.ignoreQuery == null)
            || ignoreQuery != null &amp;&amp; other.ignoreQuery != null
<span class="pc bnc" id="L234" title="All 2 branches missed.">                &amp;&amp; ignoreQuery.equals(other.ignoreQuery));</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.Query#hashCode()
   */
  @Override
  public int hashCode() {
<span class="fc" id="L244">    int h = this.getClass().getSimpleName().hashCode();</span>
<span class="fc" id="L245">    h = (h * 3) ^ field.hashCode();</span>
<span class="fc" id="L246">    h = (h * 5) ^ items.hashCode();</span>
<span class="pc bpc" id="L247" title="1 of 2 branches missed.">    if (ignoreQuery != null) {</span>
<span class="nc" id="L248">      h = (h * 7) ^ ignoreQuery.hashCode();</span>
<span class="nc" id="L249">      h = (h * 11) ^ maximumIgnoreLength.hashCode();</span>
    }
<span class="fc" id="L251">    return h;</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * org.apache.lucene.search.spans.SpanQuery#createWeight(org.apache.lucene.
   * search.IndexSearcher, boolean)
   */
  @Override
  public MtasSpanWeight createWeight(IndexSearcher searcher,
      boolean needsScores) throws IOException {
<span class="fc" id="L264">    List&lt;MtasSpanSequenceQueryWeight&gt; subWeights = new ArrayList&lt;&gt;();</span>
<span class="fc" id="L265">    SpanWeight ignoreWeight = null;</span>
<span class="fc bfc" id="L266" title="All 2 branches covered.">    for (MtasSpanSequenceItem item : items) {</span>
<span class="fc" id="L267">      subWeights.add(new MtasSpanSequenceQueryWeight(</span>
<span class="fc" id="L268">          item.getQuery().createWeight(searcher, false), item.isOptional()));</span>
<span class="fc" id="L269">    }</span>
<span class="fc bfc" id="L270" title="All 2 branches covered.">    if (ignoreQuery != null) {</span>
<span class="fc" id="L271">      ignoreWeight = ignoreQuery.createWeight(searcher, false);</span>
    }
<span class="pc bpc" id="L273" title="1 of 2 branches missed.">    return new SpanSequenceWeight(subWeights, ignoreWeight, maximumIgnoreLength,</span>
<span class="pc" id="L274">        searcher, needsScores ? getTermContexts(subWeights) : null);</span>
  }

  /**
   * Gets the term contexts.
   *
   * @param items the items
   * @return the term contexts
   */
  protected Map&lt;Term, TermContext&gt; getTermContexts(
      List&lt;MtasSpanSequenceQueryWeight&gt; items) {
<span class="nc" id="L285">    List&lt;SpanWeight&gt; weights = new ArrayList&lt;&gt;();</span>
<span class="nc bnc" id="L286" title="All 2 branches missed.">    for (MtasSpanSequenceQueryWeight item : items) {</span>
<span class="nc" id="L287">      weights.add(item.spanWeight);</span>
<span class="nc" id="L288">    }</span>
<span class="nc" id="L289">    return getTermContexts(weights);</span>
  }

  /**
   * The Class SpanSequenceWeight.
   */
  protected class SpanSequenceWeight extends MtasSpanWeight {

    /** The sub weights. */
    final List&lt;MtasSpanSequenceQueryWeight&gt; subWeights;

    /** The ignore weight. */
    final SpanWeight ignoreWeight;

    /** The maximum ignore length. */
    final Integer maximumIgnoreLength;

    /**
     * Instantiates a new span sequence weight.
     *
     * @param subWeights the sub weights
     * @param ignoreWeight the ignore weight
     * @param maximumIgnoreLength the maximum ignore length
     * @param searcher the searcher
     * @param terms the terms
     * @throws IOException Signals that an I/O exception has occurred.
     */
    public SpanSequenceWeight(List&lt;MtasSpanSequenceQueryWeight&gt; subWeights,
        SpanWeight ignoreWeight, Integer maximumIgnoreLength,
        IndexSearcher searcher, Map&lt;Term, TermContext&gt; terms)
<span class="fc" id="L319">        throws IOException {</span>
<span class="fc" id="L320">      super(MtasSpanSequenceQuery.this, searcher, terms);</span>
<span class="fc" id="L321">      this.subWeights = subWeights;</span>
<span class="fc" id="L322">      this.ignoreWeight = ignoreWeight;</span>
<span class="fc" id="L323">      this.maximumIgnoreLength = maximumIgnoreLength;</span>
<span class="fc" id="L324">    }</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="fc bfc" id="L335" title="All 2 branches covered.">      for (MtasSpanSequenceQueryWeight w : subWeights) {</span>
<span class="fc" id="L336">        w.spanWeight.extractTermContexts(contexts);</span>
<span class="fc" id="L337">      }</span>
<span class="pc bpc" id="L338" title="1 of 2 branches missed.">      if (ignoreWeight != null) {</span>
<span class="nc" id="L339">        ignoreWeight.extractTermContexts(contexts);</span>
      }
<span class="fc" id="L341">    }</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 MtasSpans getSpans(LeafReaderContext context,
        Postings requiredPostings) throws IOException {
<span class="pc bpc" id="L354" title="1 of 2 branches missed.">      if (field == null) {</span>
<span class="nc" id="L355">        return null;</span>
      } else {
<span class="fc" id="L357">        Terms terms = context.reader().terms(field);</span>
<span class="pc bpc" id="L358" title="1 of 2 branches missed.">        if (terms == null) {</span>
<span class="nc" id="L359">          return null; // field does not exist</span>
        }
<span class="fc" id="L361">        List&lt;MtasSpanSequenceQuerySpans&gt; setSequenceSpans = new ArrayList&lt;&gt;(</span>
<span class="fc" id="L362">            items.size());</span>
<span class="fc" id="L363">        Spans ignoreSpans = null;</span>
<span class="fc" id="L364">        boolean allSpansEmpty = true;</span>
<span class="fc bfc" id="L365" title="All 2 branches covered.">        for (MtasSpanSequenceQueryWeight w : subWeights) {</span>
<span class="fc" id="L366">          Spans sequenceSpans = w.spanWeight.getSpans(context,</span>
              requiredPostings);
<span class="pc bpc" id="L368" title="1 of 2 branches missed.">          if (sequenceSpans != null) {</span>
<span class="fc" id="L369">            setSequenceSpans</span>
<span class="fc" id="L370">                .add(new MtasSpanSequenceQuerySpans(sequenceSpans, w.optional));</span>
<span class="fc" id="L371">            allSpansEmpty = false;</span>
          } else {
<span class="nc bnc" id="L373" title="All 2 branches missed.">            if (w.optional) {</span>
<span class="nc" id="L374">              setSequenceSpans</span>
<span class="nc" id="L375">                  .add(new MtasSpanSequenceQuerySpans(null, w.optional));</span>
            } else {
<span class="nc" id="L377">              return null;</span>
            }
          }
<span class="fc" id="L380">        }</span>
<span class="pc bpc" id="L381" title="1 of 2 branches missed.">        if (allSpansEmpty) {</span>
<span class="nc" id="L382">          return null; // at least one required</span>
<span class="fc bfc" id="L383" title="All 2 branches covered.">        } else if (ignoreWeight != null) {</span>
<span class="fc" id="L384">          ignoreSpans = ignoreWeight.getSpans(context, requiredPostings);</span>
        }
<span class="fc" id="L386">        return new MtasSpanSequenceSpans(setSequenceSpans, ignoreSpans,</span>
            maximumIgnoreLength);
      }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.lucene.search.Weight#extractTerms(java.util.Set)
     */
    @Override
    public void extractTerms(Set&lt;Term&gt; terms) {
<span class="nc bnc" id="L398" title="All 2 branches missed.">      for (MtasSpanSequenceQueryWeight w : subWeights) {</span>
<span class="nc" id="L399">        w.spanWeight.extractTerms(terms);</span>
<span class="nc" id="L400">      }</span>
<span class="nc bnc" id="L401" title="All 2 branches missed.">      if (ignoreWeight != null) {</span>
<span class="nc" id="L402">        ignoreWeight.extractTerms(terms);</span>
      }
<span class="nc" id="L404">    }</span>

  }

  /**
   * The Class MtasSpanSequenceQuerySpans.
   */
  protected static class MtasSpanSequenceQuerySpans {

    /** The spans. */
    public Spans spans;

    /** The optional. */
    public boolean optional;

    /**
     * Instantiates a new mtas span sequence query spans.
     *
     * @param spans the spans
     * @param optional the optional
     */
<span class="fc" id="L425">    public MtasSpanSequenceQuerySpans(Spans spans, boolean optional) {</span>
<span class="pc bpc" id="L426" title="1 of 2 branches missed.">      this.spans = spans != null ? spans : new MtasSpanMatchNoneSpans();</span>
<span class="fc" id="L427">      this.optional = optional;</span>
<span class="fc" id="L428">    }</span>
  }

  /**
   * The Class MtasSpanSequenceQueryWeight.
   */
  private static class MtasSpanSequenceQueryWeight {

    /** The span weight. */
    public SpanWeight spanWeight;

    /** The optional. */
    public boolean optional;

    /**
     * Instantiates a new mtas span sequence query weight.
     *
     * @param spanWeight the span weight
     * @param optional the optional
     */
    public MtasSpanSequenceQueryWeight(SpanWeight spanWeight,
<span class="fc" id="L449">        boolean optional) {</span>
<span class="fc" id="L450">      this.spanWeight = spanWeight;</span>
<span class="fc" id="L451">      this.optional = optional;</span>
<span class="fc" id="L452">    }</span>
  }

}
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