resultsethelper.html

weka是机器学习和数据挖掘领域最有影响力的开源项目之一

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<B>Constructor Detail</B></FONT></TH>
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<A NAME="ResultSetHelper(java.sql.ResultSet)"><!-- --></A><H3>
ResultSetHelper</H3>
<PRE>
public <B>ResultSetHelper</B>(java.sql.ResultSet&nbsp;rs)</PRE>
<DL>
<DD>initializes the helper, with unlimited number of rows
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>rs</CODE> - the resultset to work on</DL>
</DL>
<HR>

<A NAME="ResultSetHelper(java.sql.ResultSet, int)"><!-- --></A><H3>
ResultSetHelper</H3>
<PRE>
public <B>ResultSetHelper</B>(java.sql.ResultSet&nbsp;rs,
                       int&nbsp;max)</PRE>
<DL>
<DD>initializes the helper, with the given maximum number of rows (less than
 1 means unlimited)
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>rs</CODE> - the resultset to work on<DD><CODE>max</CODE> - the maximum number of rows to retrieve</DL>
</DL>

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<A NAME="getResultSet()"><!-- --></A><H3>
getResultSet</H3>
<PRE>
public java.sql.ResultSet <B>getResultSet</B>()</PRE>
<DL>
<DD>the underlying resultset
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getColumnCount()"><!-- --></A><H3>
getColumnCount</H3>
<PRE>
public int <B>getColumnCount</B>()</PRE>
<DL>
<DD>returns the number of columns in the resultset
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getRowCount()"><!-- --></A><H3>
getRowCount</H3>
<PRE>
public int <B>getRowCount</B>()</PRE>
<DL>
<DD>returns the number of rows in the resultset
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getColumnNames()"><!-- --></A><H3>
getColumnNames</H3>
<PRE>
public java.lang.String[] <B>getColumnNames</B>()</PRE>
<DL>
<DD>returns an array with the names of the columns in the resultset
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getNumericColumns()"><!-- --></A><H3>
getNumericColumns</H3>
<PRE>
public boolean[] <B>getNumericColumns</B>()</PRE>
<DL>
<DD>returns an array that indicates whether a column is numeric or nor
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getColumnClasses()"><!-- --></A><H3>
getColumnClasses</H3>
<PRE>
public java.lang.Class[] <B>getColumnClasses</B>()</PRE>
<DL>
<DD>returns the classes for the columns
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hasMaxRows()"><!-- --></A><H3>
hasMaxRows</H3>
<PRE>
public boolean <B>hasMaxRows</B>()</PRE>
<DL>
<DD>whether a limit on the rows to retrieve was set
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getMaxRows()"><!-- --></A><H3>
getMaxRows</H3>
<PRE>
public int <B>getMaxRows</B>()</PRE>
<DL>
<DD>the maximum number of rows to retrieve, less than 1 means unlimited
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getCells()"><!-- --></A><H3>
getCells</H3>
<PRE>
public java.lang.Object[][] <B>getCells</B>()</PRE>
<DL>
<DD>returns an 2-dimensional array with the content of the resultset, the first
 dimension is the row, the second the column (i.e., getCells()[y][x]).
 Note: the data is not cached! It is always retrieved anew.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="typeToClass(int)"><!-- --></A><H3>
typeToClass</H3>
<PRE>
public static java.lang.Class <B>typeToClass</B>(int&nbsp;type)</PRE>
<DL>
<DD>Returns the class associated with a SQL type.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - the SQL type
<DT><B>Returns:</B><DD>the Java class corresponding with the type</DL>
</DD>
</DL>
<HR>

<A NAME="typeIsNumeric(int)"><!-- --></A><H3>
typeIsNumeric</H3>
<PRE>
public static boolean <B>typeIsNumeric</B>(int&nbsp;type)</PRE>
<DL>
<DD>returns whether the SQL type is numeric (and therefore the justification
 should be right)
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - the SQL type
<DT><B>Returns:</B><DD>whether the given type is numeric</DL>
</DD>
</DL>
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