fieldcache.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 564 行 · 第 1/3 页

                  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>Checks the internal cache for an appropriate entry, and if
 none is found, reads the terms in <code>field</code> as floats and returns an array
 of size <code>reader.maxDoc()</code> of the value each document
 has in the given field.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the floats.
<DT><B>Returns:</B><DD>The values in the given field for each document.
<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> - If any error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getFloats(org.apache.lucene.index.IndexReader, java.lang.String, org.apache.lucene.search.FieldCache.FloatParser)"><!-- --></A><H3>
getFloats</H3>
<PRE>
public float[] <B>getFloats</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader,
                         <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,
                         <A HREF="../../../../org/apache/lucene/search/FieldCache.FloatParser.html" title="interface in org.apache.lucene.search">FieldCache.FloatParser</A>&nbsp;parser)
                  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>Checks the internal cache for an appropriate entry, and if
 none is found, reads the terms in <code>field</code> as floats and returns an array
 of size <code>reader.maxDoc()</code> of the value each document
 has in the given field.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the floats.<DD><CODE>parser</CODE> - Computes float for string values.
<DT><B>Returns:</B><DD>The values in the given field for each document.
<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> - If any error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getStrings(org.apache.lucene.index.IndexReader, java.lang.String)"><!-- --></A><H3>
getStrings</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>getStrings</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader,
                           <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)
                    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>Checks the internal cache for an appropriate entry, and if none
 is found, reads the term values in <code>field</code> and returns an array
 of size <code>reader.maxDoc()</code> containing the value each document
 has in the given field.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the strings.
<DT><B>Returns:</B><DD>The values in the given field for each document.
<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> - If any error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getStringIndex(org.apache.lucene.index.IndexReader, java.lang.String)"><!-- --></A><H3>
getStringIndex</H3>
<PRE>
public <A HREF="../../../../org/apache/lucene/search/FieldCache.StringIndex.html" title="class in org.apache.lucene.search">FieldCache.StringIndex</A> <B>getStringIndex</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader,
                                             <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)
                                      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>Checks the internal cache for an appropriate entry, and if none
 is found reads the term values in <code>field</code> and returns
 an array of them in natural order, along with an array telling
 which element in the term array each document uses.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the strings.
<DT><B>Returns:</B><DD>Array of terms and index into the array for each document.
<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> - If any error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getAuto(org.apache.lucene.index.IndexReader, java.lang.String)"><!-- --></A><H3>
getAuto</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>getAuto</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader,
                      <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)
               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>Checks the internal cache for an appropriate entry, and if
 none is found reads <code>field</code> to see if it contains integers, floats
 or strings, and then calls one of the other methods in this class to get the
 values.  For string values, a StringIndex is returned.  After
 calling this method, there is an entry in the cache for both
 type <code>AUTO</code> and the actual found type.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the values.
<DT><B>Returns:</B><DD>int[], float[] or StringIndex.
<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> - If any error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getCustom(org.apache.lucene.index.IndexReader, java.lang.String, org.apache.lucene.search.SortComparator)"><!-- --></A><H3>
getCustom</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Comparable.html" title="class or interface in java.lang">Comparable</A>[] <B>getCustom</B>(<A HREF="../../../../org/apache/lucene/index/IndexReader.html" title="class in org.apache.lucene.index">IndexReader</A>&nbsp;reader,
                              <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,
                              <A HREF="../../../../org/apache/lucene/search/SortComparator.html" title="class in org.apache.lucene.search">SortComparator</A>&nbsp;comparator)
                       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>Checks the internal cache for an appropriate entry, and if none
 is found reads the terms out of <code>field</code> and calls the given SortComparator
 to get the sort values.  A hit in the cache will happen if <code>reader</code>,
 <code>field</code>, and <code>comparator</code> are the same (using <code>equals()</code>)
 as a previous call to this method.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - Used to get field values.<DD><CODE>field</CODE> - Which field contains the values.<DD><CODE>comparator</CODE> - Used to convert terms into something to sort by.
<DT><B>Returns:</B><DD>Array of sort objects, one for each document.
<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> - If any error occurs.</DL>
</DD>
</DL>
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