MtasPrefixTokenFilterFactory.java.html 5.42 KB
<?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>MtasPrefixTokenFilterFactory.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.analysis.util</a> &gt; <span class="el_source">MtasPrefixTokenFilterFactory.java</span></div><h1>MtasPrefixTokenFilterFactory.java</h1><pre class="source lang-java linenums">package mtas.analysis.util;

import java.io.IOException;
import java.util.Map;
import mtas.analysis.token.MtasToken;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.util.TokenFilterFactory;

/**
 * A factory for creating MtasPrefixTokenFilter objects.
 */
public class MtasPrefixTokenFilterFactory extends TokenFilterFactory {

  /** The prefix. */
  private String prefix;

  /**
   * Instantiates a new mtas prefix token filter factory.
   *
   * @param args the args
   */
  public MtasPrefixTokenFilterFactory(Map&lt;String, String&gt; args) {
<span class="fc" id="L25">    super(args);</span>
<span class="fc" id="L26">    prefix = get(args, &quot;prefix&quot;);</span>
<span class="fc" id="L27">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see
   * org.apache.lucene.analysis.util.TokenFilterFactory#create(org.apache.lucene
   * .analysis.TokenStream)
   */
  @Override
  public TokenStream create(TokenStream input) {
<span class="nc" id="L38">    return new MtasPrefixTokenFilter(input, prefix);</span>
  }

  /**
   * The Class MtasPrefixTokenFilter.
   */
  private static class MtasPrefixTokenFilter extends TokenFilter {

    /** The prefix. */
    private String prefix;

    /** The term att. */
<span class="nc" id="L50">    private final CharTermAttribute termAtt = addAttribute(</span>
        CharTermAttribute.class);

    /**
     * Instantiates a new mtas prefix token filter.
     *
     * @param input the input
     * @param prefix the prefix
     */
    protected MtasPrefixTokenFilter(TokenStream input, String prefix) {
<span class="nc" id="L60">      super(input);</span>
<span class="nc" id="L61">      this.prefix = prefix + MtasToken.DELIMITER;</span>
<span class="nc" id="L62">    }</span>

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.lucene.analysis.TokenStream#incrementToken()
     */
    @Override
    public final boolean incrementToken() throws IOException {
<span class="nc bnc" id="L71" title="All 2 branches missed.">      if (input.incrementToken()) {</span>
<span class="nc" id="L72">        int oldLen = termAtt.length();</span>
<span class="nc" id="L73">        char[] buffer = termAtt.resizeBuffer(oldLen + prefix.length());</span>

<span class="nc bnc" id="L75" title="All 2 branches missed.">        for (int i = 0; i &lt; oldLen; i++) {</span>
<span class="nc" id="L76">          buffer[(oldLen + prefix.length() - 1 - i)] = buffer[(oldLen - 1 - i)];</span>
        }
<span class="nc bnc" id="L78" title="All 2 branches missed.">        for (int i = 0; i &lt; prefix.length(); i++) {</span>
<span class="nc" id="L79">          buffer[i] = prefix.charAt(i);</span>
        }
<span class="nc" id="L81">        termAtt.copyBuffer(buffer, 0, oldLen + prefix.length());</span>
<span class="nc" id="L82">        return true;</span>
      } else {
<span class="nc" id="L84">        return false;</span>
      }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.lucene.util.AttributeSource#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
<span class="nc bnc" id="L95" title="All 2 branches missed.">      if (this == obj)</span>
<span class="nc" id="L96">        return true;</span>
<span class="nc bnc" id="L97" title="All 2 branches missed.">      if (obj == null)</span>
<span class="nc" id="L98">        return false;</span>
<span class="nc bnc" id="L99" title="All 2 branches missed.">      if (getClass() != obj.getClass())</span>
<span class="nc" id="L100">        return false;</span>
<span class="nc" id="L101">      final MtasPrefixTokenFilter that = (MtasPrefixTokenFilter) obj;</span>
<span class="nc bnc" id="L102" title="All 4 branches missed.">      return prefix.equals(that.prefix) &amp;&amp; super.equals(that);</span>
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.lucene.util.AttributeSource#hashCode()
     */
    @Override
    public int hashCode() {
<span class="nc" id="L112">      int h = this.getClass().getSimpleName().hashCode();</span>
<span class="nc" id="L113">      h = (h * 7) ^ prefix.hashCode();</span>
<span class="nc" id="L114">      return h;</span>
    }

  }

}
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