Examples of org.apache.lucene.misc.SweetSpotSimilarity

org.apache.lucene.misc.SweetSpotSimilarity

A similarity with a lengthNorm that provides for a "plateau" of equally good lengths, and tf helper functions.

For lengthNorm, A global min/max can be specified to define the plateau of lengths that should all have a norm of 1.0. Below the min, and above the max the lengthNorm drops off in a sqrt function.

A per field min/max can be specified if different fields have different sweet spots.

For tf, baselineTf and hyperbolicTf functions are provided, which subclasses can choose between.

    Object simClass = find(srchOpts, "simClass");
    Object ckSimCust = find(srchOpts, "ckSimCust");
    if (getBoolean(ckSimDef, "selected")) {
      return new DefaultSimilarity();
    } else if (getBoolean(ckSimSweet, "selected")) {
      return new SweetSpotSimilarity();
    } else if (getBoolean(ckSimOther, "selected")) {
      try {
        Class clazz = Class.forName(getString(simClass, "text"));
        if (Similarity.class.isAssignableFrom(clazz)) {
          Similarity sim = (Similarity)clazz.newInstance();

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of org.apache.lucene.misc.SweetSpotSimilarity

Related Classes of org.apache.lucene.misc.SweetSpotSimilarity