dariah / mtas

MtasSpanFullyAlignedWithSpans.java.html 14.5 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>MtasSpanFullyAlignedWithSpans.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">MtasSpanFullyAlignedWithSpans.java</span></div><h1>MtasSpanFullyAlignedWithSpans.java</h1><pre class="source lang-java linenums">package mtas.search.spans;

import java.io.IOException;
import java.util.HashSet;
import org.apache.lucene.search.spans.SpanCollector;
import org.apache.lucene.search.spans.Spans;

import mtas.search.spans.MtasSpanFullyAlignedWithQuery.MtasSpanFullyAlignedWithQuerySpans;
import mtas.search.spans.util.MtasSpans;

/**
 * The Class MtasSpanFullyAlignedWithSpans.
 */
public class MtasSpanFullyAlignedWithSpans extends Spans implements MtasSpans {

  /** The spans 1. */
  private MtasSpanFullyAlignedWithQuerySpans spans1;
  
  /** The spans 2. */
  private MtasSpanFullyAlignedWithQuerySpans spans2;

  /** The last spans 2 start position. */
  private int lastSpans2StartPosition;
  
  /** The last spans 2 end position. */
  private int lastSpans2EndPosition;
  
  /** The previous spans 2 start position. */
  private int previousSpans2StartPosition;
  
  /** The previous spans 2 end positions. */
  private HashSet&lt;Integer&gt; previousSpans2EndPositions;

  /** The called next start position. */
  private boolean calledNextStartPosition;
  
  /** The no more positions. */
  private boolean noMorePositions;

  /** The doc id. */
  private int docId;

  /**
   * Instantiates a new mtas span fully aligned with spans.
   *
   * @param mtasSpanFullyAlignedWithQuery the mtas span fully aligned with query
   * @param spans1 the spans 1
   * @param spans2 the spans 2
   */
  public MtasSpanFullyAlignedWithSpans(
      MtasSpanFullyAlignedWithQuery mtasSpanFullyAlignedWithQuery,
      MtasSpanFullyAlignedWithQuerySpans spans1,
      MtasSpanFullyAlignedWithQuerySpans spans2) {
<span class="nc" id="L54">    super();</span>
<span class="nc" id="L55">    docId = -1;</span>
<span class="nc" id="L56">    this.spans1 = spans1;</span>
<span class="nc" id="L57">    this.spans2 = spans2;</span>
<span class="nc" id="L58">    previousSpans2EndPositions = new HashSet&lt;Integer&gt;();</span>
<span class="nc" id="L59">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.Spans#nextStartPosition()
   */
  @Override
  public int nextStartPosition() throws IOException {
    // no document
<span class="nc bnc" id="L69" title="All 4 branches missed.">    if (docId == -1 || docId == NO_MORE_DOCS) {</span>
<span class="nc" id="L70">      throw new IOException(&quot;no document&quot;);</span>
      // finished
<span class="nc bnc" id="L72" title="All 2 branches missed.">    } else if (noMorePositions) {</span>
<span class="nc" id="L73">      return NO_MORE_POSITIONS;</span>
      // littleSpans already at start match, because of check for matching
      // document
<span class="nc bnc" id="L76" title="All 2 branches missed.">    } else if (!calledNextStartPosition) {</span>
<span class="nc" id="L77">      calledNextStartPosition = true;</span>
<span class="nc" id="L78">      return spans1.spans.startPosition();</span>
      // compute next match
    } else {
<span class="nc bnc" id="L81" title="All 2 branches missed.">      if (goToNextStartPosition()) {</span>
        // match found
<span class="nc" id="L83">        return spans1.spans.startPosition();</span>
      } else {
        // no more matches: document finished
<span class="nc" id="L86">        return NO_MORE_POSITIONS;</span>
      }
    }
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.Spans#startPosition()
   */
  @Override
  public int startPosition() {
<span class="nc bnc" id="L98" title="All 4 branches missed.">    return calledNextStartPosition</span>
<span class="nc" id="L99">        ? (noMorePositions ? NO_MORE_POSITIONS : spans1.spans.startPosition())</span>
        : -1;
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.Spans#endPosition()
   */
  @Override
  public int endPosition() {
<span class="nc bnc" id="L110" title="All 4 branches missed.">    return calledNextStartPosition</span>
<span class="nc" id="L111">        ? (noMorePositions ? NO_MORE_POSITIONS : spans1.spans.endPosition())</span>
        : -1;
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.Spans#width()
   */
  @Override
  public int width() {
<span class="nc bnc" id="L122" title="All 4 branches missed.">    return calledNextStartPosition ? (noMorePositions ? 0</span>
<span class="nc" id="L123">        : spans1.spans.endPosition() - spans1.spans.startPosition()) : 0;</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="L135">    spans1.spans.collect(collector);</span>
<span class="nc" id="L136">    spans2.spans.collect(collector);</span>
<span class="nc" id="L137">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.spans.Spans#positionsCost()
   */
  @Override
  public float positionsCost() {
<span class="nc" id="L146">    return 0;</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.DocIdSetIterator#docID()
   */
  @Override
  public int docID() {
<span class="nc" id="L156">    return docId;</span>
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.DocIdSetIterator#nextDoc()
   */
  @Override
  public int nextDoc() throws IOException {
<span class="nc" id="L166">    reset();</span>
<span class="nc bnc" id="L167" title="All 2 branches missed.">    while (!goToNextDoc())</span>
<span class="nc" id="L168">      ;</span>
<span class="nc" id="L169">    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="L179">    reset();</span>
<span class="nc bnc" id="L180" title="All 2 branches missed.">    if (docId == NO_MORE_DOCS) {</span>
<span class="nc" id="L181">      return docId;</span>
<span class="nc bnc" id="L182" title="All 2 branches missed.">    } else if (target &lt; docId) {</span>
      // should not happen
<span class="nc" id="L184">      docId = NO_MORE_DOCS;</span>
<span class="nc" id="L185">      return docId;</span>
    } else {
      // advance 1
<span class="nc" id="L188">      int spans1DocId = spans1.spans.docID();</span>
<span class="nc bnc" id="L189" title="All 2 branches missed.">      if (spans1DocId &lt; target) {</span>
<span class="nc" id="L190">        spans1DocId = spans1.spans.advance(target);</span>
<span class="nc bnc" id="L191" title="All 2 branches missed.">        if (spans1DocId == NO_MORE_DOCS) {</span>
<span class="nc" id="L192">          docId = NO_MORE_DOCS;</span>
<span class="nc" id="L193">          return docId;</span>
        }
<span class="nc" id="L195">        target = Math.max(target, spans1DocId);</span>
      }
<span class="nc" id="L197">      int spans2DocId = spans2.spans.docID();</span>
      // advance 2
<span class="nc bnc" id="L199" title="All 2 branches missed.">      if (spans2DocId &lt; target) {</span>
<span class="nc" id="L200">        spans2DocId = spans2.spans.advance(target);</span>
<span class="nc bnc" id="L201" title="All 2 branches missed.">        if (spans2DocId == NO_MORE_DOCS) {</span>
<span class="nc" id="L202">          docId = NO_MORE_DOCS;</span>
<span class="nc" id="L203">          return docId;</span>
        }
      }
      // check equal docId, otherwise next
<span class="nc bnc" id="L207" title="All 2 branches missed.">      if (spans1DocId == spans2DocId) {</span>
<span class="nc" id="L208">        docId = spans1DocId;</span>
        // check match
<span class="nc bnc" id="L210" title="All 2 branches missed.">        if (goToNextStartPosition()) {</span>
<span class="nc" id="L211">          return docId;</span>
        } else {
<span class="nc" id="L213">          return nextDoc();</span>
        }
      } else {
<span class="nc" id="L216">        return nextDoc();</span>
      }
    }
  }

  /**
   * Go to next doc.
   *
   * @return true, if successful
   * @throws IOException Signals that an I/O exception has occurred.
   */
  private boolean goToNextDoc() throws IOException {
<span class="nc bnc" id="L228" title="All 2 branches missed.">    if (docId == NO_MORE_DOCS) {</span>
<span class="nc" id="L229">      return true;</span>
    } else {
<span class="nc" id="L231">      int spans1DocId = spans1.spans.nextDoc();</span>
<span class="nc" id="L232">      int spans2DocId = spans2.spans.docID();</span>
<span class="nc" id="L233">      docId = Math.max(spans1DocId, spans2DocId);</span>
<span class="nc bnc" id="L234" title="All 4 branches missed.">      while (spans1DocId != spans2DocId &amp;&amp; docId != NO_MORE_DOCS) {</span>
<span class="nc bnc" id="L235" title="All 2 branches missed.">        if (spans1DocId &lt; spans2DocId) {</span>
<span class="nc" id="L236">          spans1DocId = spans1.spans.advance(spans2DocId);</span>
<span class="nc" id="L237">          docId = spans1DocId;</span>
        } else {
<span class="nc" id="L239">          spans2DocId = spans2.spans.advance(spans1DocId);</span>
<span class="nc" id="L240">          docId = spans2DocId;</span>
        }
      }
<span class="nc bnc" id="L243" title="All 2 branches missed.">      if (docId != NO_MORE_DOCS) {</span>
<span class="nc bnc" id="L244" title="All 2 branches missed.">        if (!goToNextStartPosition()) {</span>
<span class="nc" id="L245">          reset();</span>
<span class="nc" id="L246">          return false;</span>
        }
      }
<span class="nc" id="L249">      return true;</span>
    }
  }

  /**
   * Go to next start position.
   *
   * @return true, if successful
   * @throws IOException Signals that an I/O exception has occurred.
   */
  private boolean goToNextStartPosition() throws IOException {
    int nextSpans1StartPosition, nextSpans1EndPosition;
    int nextSpans2StartPosition, nextSpans2EndPosition;
<span class="nc" id="L262">    while ((nextSpans1StartPosition = spans1.spans</span>
<span class="nc bnc" id="L263" title="All 2 branches missed.">        .nextStartPosition()) != NO_MORE_POSITIONS) {</span>
<span class="nc" id="L264">      nextSpans1EndPosition = spans1.spans.endPosition();</span>
<span class="nc bnc" id="L265" title="All 2 branches missed.">      if (nextSpans1StartPosition == previousSpans2StartPosition) {</span>
<span class="nc bnc" id="L266" title="All 2 branches missed.">        if (previousSpans2EndPositions.contains(nextSpans1EndPosition)) {</span>
<span class="nc" id="L267">          return true;</span>
        }
<span class="nc bnc" id="L269" title="All 2 branches missed.">      } else if (nextSpans1StartPosition == lastSpans2StartPosition) {</span>
<span class="nc bnc" id="L270" title="All 2 branches missed.">        if (nextSpans1EndPosition == lastSpans2EndPosition) {</span>
<span class="nc" id="L271">          return true;</span>
        }
      } else {
<span class="nc bnc" id="L274" title="All 2 branches missed.">        while (lastSpans2StartPosition &lt;= nextSpans1StartPosition) {</span>
<span class="nc" id="L275">          nextSpans2StartPosition = spans2.spans.nextStartPosition();</span>
<span class="nc bnc" id="L276" title="All 2 branches missed.">          if (nextSpans2StartPosition == NO_MORE_POSITIONS) {</span>
<span class="nc" id="L277">            noMorePositions = true;</span>
<span class="nc" id="L278">            return false;</span>
          } else {
<span class="nc" id="L280">            nextSpans2EndPosition = spans2.spans.endPosition();</span>
<span class="nc bnc" id="L281" title="All 4 branches missed.">            if (lastSpans2StartPosition == nextSpans2StartPosition</span>
                &amp;&amp; nextSpans1StartPosition == nextSpans2StartPosition) {
<span class="nc bnc" id="L283" title="All 2 branches missed.">              if (previousSpans2StartPosition != lastSpans2StartPosition) {</span>
<span class="nc" id="L284">                previousSpans2StartPosition = lastSpans2StartPosition;</span>
<span class="nc" id="L285">                previousSpans2EndPositions.clear();</span>
              }
<span class="nc" id="L287">              previousSpans2EndPositions.add(lastSpans2EndPosition);</span>
            }
<span class="nc" id="L289">            lastSpans2StartPosition = nextSpans2StartPosition;</span>
<span class="nc" id="L290">            lastSpans2EndPosition = nextSpans2EndPosition;</span>
<span class="nc bnc" id="L291" title="All 4 branches missed.">            if (nextSpans1StartPosition == nextSpans2StartPosition</span>
                &amp;&amp; nextSpans1EndPosition == nextSpans2EndPosition) {
<span class="nc" id="L293">              return true;</span>
            }
          }
        }

      }
    }
<span class="nc" id="L300">    noMorePositions = true;</span>
<span class="nc" id="L301">    return false;</span>
  }

  /**
   * Reset.
   */
  private void reset() {
<span class="nc" id="L308">    calledNextStartPosition = false;</span>
<span class="nc" id="L309">    noMorePositions = false;</span>
<span class="nc" id="L310">    lastSpans2StartPosition = -1;</span>
<span class="nc" id="L311">    lastSpans2EndPosition = -1;</span>
<span class="nc" id="L312">    previousSpans2StartPosition = -1;</span>
<span class="nc" id="L313">    previousSpans2EndPositions.clear();</span>
<span class="nc" id="L314">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.lucene.search.DocIdSetIterator#cost()
   */
  @Override
  public long cost() {
<span class="nc" id="L323">    return 0;</span>
  }

}
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