query.html

来自「 Lucene是apache软件基金会[4] jakarta项目组的一个子项目」· HTML 代码 · 共 600 行 · 第 1/2 页

setBoost</H3>
<PRE>
public void <B>setBoost</B>(float&nbsp;b)</PRE>
<DL>
<DD>Sets the boost for this query clause to <code>b</code>.  Documents
 matching this clause will (in addition to the normal weightings) have
 their score multiplied by <code>b</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getBoost()"><!-- --></A><H3>
getBoost</H3>
<PRE>
public float <B>getBoost</B>()</PRE>
<DL>
<DD>Gets the boost for this clause.  Documents matching
 this clause will (in addition to the normal weightings) have their score
 multiplied by <code>b</code>.   The boost is 1.0 by default.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toString(java.lang.String)"><!-- --></A><H3>
toString</H3>
<PRE>
public abstract <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>toString</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>&nbsp;field)</PRE>
<DL>
<DD>Prints a query to a string, with <code>field</code> assumed to be the 
 default field and omitted.
 <p>The representation used is one that is supposed to be readable
 by <A HREF="../../../../org/apache/lucene/queryParser/QueryParser.html" title="class in org.apache.lucene.queryParser"><CODE>QueryParser</CODE></A>. However,
 there are the following limitations:
 <ul>
  <li>If the query was created by the parser, the printed
  representation may not be exactly what was parsed. For example,
  characters that need to be escaped will be represented without
  the required backslash.</li>
 <li>Some of the more complicated queries (e.g. span queries)
  don't have a representation that can be parsed by QueryParser.</li>
 </ul>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Prints a query to a string.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="createWeight(org.apache.lucene.search.Searcher)"><!-- --></A><H3>
createWeight</H3>
<PRE>
protected <A HREF="../../../../org/apache/lucene/search/Weight.html" title="interface in org.apache.lucene.search">Weight</A> <B>createWeight</B>(<A HREF="../../../../org/apache/lucene/search/Searcher.html" title="class in org.apache.lucene.search">Searcher</A>&nbsp;searcher)
                       throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Expert: Constructs an appropriate Weight implementation for this query.

 <p>Only implemented by primitive queries, which re-write to themselves.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="weight(org.apache.lucene.search.Searcher)"><!-- --></A><H3>
weight</H3>
<PRE>
public <A HREF="../../../../org/apache/lucene/search/Weight.html" title="interface in org.apache.lucene.search">Weight</A> <B>weight</B>(<A HREF="../../../../org/apache/lucene/search/Searcher.html" title="class in org.apache.lucene.search">Searcher</A>&nbsp;searcher)
              throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Expert: Constructs and initializes a Weight for a top-level query.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="rewrite(org.apache.lucene.index.IndexReader)"><!-- --></A><H3>
rewrite</H3>
<PRE>
public <A HREF="../../../../org/apache/lucene/search/Query.html" title="class in org.apache.lucene.search">Query</A> <B>rewrite</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader)
              throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Expert: called to re-write queries into primitive queries. For example,
 a PrefixQuery will be rewritten into a BooleanQuery that consists
 of TermQuerys.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="combine(org.apache.lucene.search.Query[])"><!-- --></A><H3>
combine</H3>
<PRE>
public <A HREF="../../../../org/apache/lucene/search/Query.html" title="class in org.apache.lucene.search">Query</A> <B>combine</B>(<A HREF="../../../../org/apache/lucene/search/Query.html" title="class in org.apache.lucene.search">Query</A>[]&nbsp;queries)</PRE>
<DL>
<DD>Expert: called when re-writing queries under MultiSearcher.

 Create a single query suitable for use by all subsearchers (in 1-1
 correspondence with queries). This is an optimization of the OR of
 all queries. We handle the common optimization cases of equal
 queries and overlapping clauses of boolean OR queries (as generated
 by MultiTermQuery.rewrite() and RangeQuery.rewrite()).
 Be careful overriding this method as queries[0] determines which
 method will be called and is not necessarily of the same type as
 the other queries.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="extractTerms(java.util.Set)"><!-- --></A><H3>
extractTerms</H3>
<PRE>
public void <B>extractTerms</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util">Set</A>&nbsp;terms)</PRE>
<DL>
<DD>Expert: adds all terms occuring in this query to the terms set. Only
 works if this query is in its <A HREF="../../../../org/apache/lucene/search/Query.html#rewrite(org.apache.lucene.index.IndexReader)"><CODE>rewritten</CODE></A> form.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>UnsupportedOperationException</CODE> - if this query is not yet rewritten</DL>
</DD>
</DL>
<HR>

<A NAME="mergeBooleanQueries(org.apache.lucene.search.Query[])"><!-- --></A><H3>
mergeBooleanQueries</H3>
<PRE>
public static <A HREF="../../../../org/apache/lucene/search/Query.html" title="class in org.apache.lucene.search">Query</A> <B>mergeBooleanQueries</B>(<A HREF="../../../../org/apache/lucene/search/Query.html" title="class in org.apache.lucene.search">Query</A>[]&nbsp;queries)</PRE>
<DL>
<DD>Expert: merges the clauses of a set of BooleanQuery's into a single
 BooleanQuery.

<p>A utility for use by <A HREF="../../../../org/apache/lucene/search/Query.html#combine(org.apache.lucene.search.Query[])"><CODE>combine(Query[])</CODE></A> implementations.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getSimilarity(org.apache.lucene.search.Searcher)"><!-- --></A><H3>
getSimilarity</H3>
<PRE>
public <A HREF="../../../../org/apache/lucene/search/Similarity.html" title="class in org.apache.lucene.search">Similarity</A> <B>getSimilarity</B>(<A HREF="../../../../org/apache/lucene/search/Searcher.html" title="class in org.apache.lucene.search">Searcher</A>&nbsp;searcher)</PRE>
<DL>
<DD>Expert: Returns the Similarity implementation to be used for this query.
 Subclasses may override this method to specify their own Similarity
 implementation, perhaps one that delegates through that of the Searcher.
 By default the Searcher's Similarity implementation is returned.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public <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>clone</B>()</PRE>
<DL>
<DD>Returns a clone of this query.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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