similaritydelegator.html
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SimilarityDelegator (Lucene 2.1.0 API)
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org.apache.lucene.search</FONT>
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Class SimilarityDelegator</H2>
<PRE>
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search">org.apache.lucene.search.Similarity</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.apache.lucene.search.SimilarityDelegator</B>
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<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DD>
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<DT>public class <B>SimilarityDelegator</B><DT>extends <A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search">Similarity</A></DL>
<P>
Expert: Delegating scoring implementation. Useful in <A HREF="../../../../org/apache/lucene/search/Query.html#getSimilarity(org.apache.lucene.search.Searcher)"><CODE>Query.getSimilarity(Searcher)</CODE></A> implementations, to override only certain methods of a Searcher's Similiarty implementation..
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<DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.apache.lucene.search.SimilarityDelegator">Serialized Form</A></DL>
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<B>Constructor Summary</B></FONT></TD>
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<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#SimilarityDelegator(org.apache.lucene.search.Similarity)">SimilarityDelegator</A></B>(<A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search">Similarity</A> delegee)</CODE>
<BR>
Construct a <A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search"><CODE>Similarity</CODE></A> that delegates all methods to another.</TD>
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<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#coord(int, int)">coord</A></B>(int overlap, int maxOverlap)</CODE>
<BR>
Computes a score factor based on the fraction of all query terms that a document contains.</TD>
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<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#idf(int, int)">idf</A></B>(int docFreq, int numDocs)</CODE>
<BR>
Computes a score factor based on a term's document frequency (the number of documents which contain the term).</TD>
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<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#lengthNorm(java.lang.String, int)">lengthNorm</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> fieldName, int numTerms)</CODE>
<BR>
Computes the normalization value for a field given the total number of terms contained in a field.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#queryNorm(float)">queryNorm</A></B>(float sumOfSquaredWeights)</CODE>
<BR>
Computes the normalization value for a query given the sum of the squared weights of each of the query terms.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#sloppyFreq(int)">sloppyFreq</A></B>(int distance)</CODE>
<BR>
Computes the amount of a sloppy phrase match, based on an edit distance.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/search/SimilarityDelegator.html#tf(float)">tf</A></B>(float freq)</CODE>
<BR>
Computes a score factor based on a term or phrase's frequency in a document.</TD>
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<TD><B>Methods inherited from class org.apache.lucene.search.<A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search">Similarity</A></B></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../org/apache/lucene/search/Similarity.html#decodeNorm(byte)">decodeNorm</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#encodeNorm(float)">encodeNorm</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#getDefault()">getDefault</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#getNormDecoder()">getNormDecoder</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#idf(java.util.Collection, org.apache.lucene.search.Searcher)">idf</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#idf(org.apache.lucene.index.Term, org.apache.lucene.search.Searcher)">idf</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#setDefault(org.apache.lucene.search.Similarity)">setDefault</A>, <A HREF="../../../../org/apache/lucene/search/Similarity.html#tf(int)">tf</A></CODE></TD>
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<TD><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD>
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<TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<B>Constructor Detail</B></FONT></TD>
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<A NAME="SimilarityDelegator(org.apache.lucene.search.Similarity)"><!-- --></A><H3>
SimilarityDelegator</H3>
<PRE>
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