databaseresultlistener.html

< 数据挖掘--实用机器学习技术及java实现> 一书结合数据挖掘和机器学习的知识,作者陈述了自动挖掘模式的基础理论,并且以java语言实现了具有代表性的各类数据挖掘方法.例如:class

<PRE>
public void <B>postProcess</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp)
                 throws java.lang.Exception</PRE>
<DL>
<DD>Perform any postprocessing. When this method is called, it indicates
 that no more results will be sent that need to be grouped together
 in any way.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../weka/experiment/ResultListener.html#postProcess(weka.experiment.ResultProducer)">postProcess</A></CODE> in interface <CODE><A HREF="../../weka/experiment/ResultListener.html">ResultListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer that generated the results<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="determineColumnConstraints(weka.experiment.ResultProducer)"><!-- --></A><H3>
determineColumnConstraints</H3>
<PRE>
public java.lang.String[] <B>determineColumnConstraints</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp)
                                              throws java.lang.Exception</PRE>
<DL>
<DD>Determines if there are any constraints (imposed by the
 destination) on any additional measures produced by
 resultProducers. Null should be returned if there are NO
 constraints, otherwise a list of column names should be
 returned as an array of Strings. In the case of
 DatabaseResultListener, the structure of an existing database
 will impose constraints.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../weka/experiment/ResultListener.html#determineColumnConstraints(weka.experiment.ResultProducer)">determineColumnConstraints</A></CODE> in interface <CODE><A HREF="../../weka/experiment/ResultListener.html">ResultListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer to which the constraints will apply<DT><B>Returns:</B><DD>an array of column names to which resutltProducer's
 results will be restricted.<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if an error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="acceptResult(weka.experiment.ResultProducer, java.lang.Object[], java.lang.Object[])"><!-- --></A><H3>
acceptResult</H3>
<PRE>
public void <B>acceptResult</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp,
                         java.lang.Object[]&nbsp;key,
                         java.lang.Object[]&nbsp;result)
                  throws java.lang.Exception</PRE>
<DL>
<DD>Submit the result to the appropriate table of the database<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../weka/experiment/ResultListener.html#acceptResult(weka.experiment.ResultProducer, java.lang.Object[], java.lang.Object[])">acceptResult</A></CODE> in interface <CODE><A HREF="../../weka/experiment/ResultListener.html">ResultListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer that generated the result<DD><CODE>key</CODE> - The key for the results.<DD><CODE>result</CODE> - The actual results.<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the result couldn't be sent to the database</DL>
</DD>
</DL>
<HR>

<A NAME="isResultRequired(weka.experiment.ResultProducer, java.lang.Object[])"><!-- --></A><H3>
isResultRequired</H3>
<PRE>
public boolean <B>isResultRequired</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp,
                                java.lang.Object[]&nbsp;key)
                         throws java.lang.Exception</PRE>
<DL>
<DD>Always says a result is required. If this is the first call,
 prints out the header for the Database output.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../weka/experiment/ResultListener.html#isResultRequired(weka.experiment.ResultProducer, java.lang.Object[])">isResultRequired</A></CODE> in interface <CODE><A HREF="../../weka/experiment/ResultListener.html">ResultListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer wanting to generate the result<DD><CODE>key</CODE> - The key for which a result may be needed.<DT><B>Returns:</B><DD>true if the result should be calculated.<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the database couldn't be queried</DL>
</DD>
</DL>
<HR>

<A NAME="updateResultsTableName(weka.experiment.ResultProducer)"><!-- --></A><H3>
updateResultsTableName</H3>
<PRE>
protected void <B>updateResultsTableName</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp)
                               throws java.lang.Exception</PRE>
<DL>
<DD>Determines the table name that results will be inserted into. If
 required: a connection will be opened, an experiment index table created,
 and the results table created.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="cacheKeyNameTipText()"><!-- --></A><H3>
cacheKeyNameTipText</H3>
<PRE>
public java.lang.String <B>cacheKeyNameTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>tip text for this property suitable for
 displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="getCacheKeyName()"><!-- --></A><H3>
getCacheKeyName</H3>
<PRE>
public java.lang.String <B>getCacheKeyName</B>()</PRE>
<DL>
<DD>Get the value of CacheKeyName.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>Value of CacheKeyName.</DL>
</DD>
</DL>
<HR>

<A NAME="setCacheKeyName(java.lang.String)"><!-- --></A><H3>
setCacheKeyName</H3>
<PRE>
public void <B>setCacheKeyName</B>(java.lang.String&nbsp;newCacheKeyName)</PRE>
<DL>
<DD>Set the value of CacheKeyName.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>newCacheKeyName</CODE> - Value to assign to CacheKeyName.</DL>
</DD>
</DL>
<HR>

<A NAME="isCacheValid(java.lang.Object[])"><!-- --></A><H3>
isCacheValid</H3>
<PRE>
protected boolean <B>isCacheValid</B>(java.lang.Object[]&nbsp;key)</PRE>
<DL>
<DD>Checks whether the current cache contents are valid for the supplied
 key.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the results key<DT><B>Returns:</B><DD>true if the cache contents are valid for the key given</DL>
</DD>
</DL>
<HR>

<A NAME="isKeyInCache(weka.experiment.ResultProducer, java.lang.Object[])"><!-- --></A><H3>
isKeyInCache</H3>
<PRE>
protected boolean <B>isKeyInCache</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp,
                               java.lang.Object[]&nbsp;key)
                        throws java.lang.Exception</PRE>
<DL>
<DD>Returns true if the supplied key is in the key cache (and thus
 we do not need to execute a database query).<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer the key belongs to.<DD><CODE>key</CODE> - the result key<DT><B>Returns:</B><DD>true if the key is in the key cache<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="loadCache(weka.experiment.ResultProducer, java.lang.Object[])"><!-- --></A><H3>
loadCache</H3>
<PRE>
protected void <B>loadCache</B>(<A HREF="../../weka/experiment/ResultProducer.html">ResultProducer</A>&nbsp;rp,
                         java.lang.Object[]&nbsp;key)
                  throws java.lang.Exception</PRE>
<DL>
<DD>Executes a database query to fill the key cache<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rp</CODE> - the ResultProducer the key belongs to<DD><CODE>key</CODE> - the key<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
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