resultsetdatamodel.html

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<A NAME="isRowAvailable()"><!-- --></A><H3>
isRowAvailable</H3>
<PRE>
public boolean <B>isRowAvailable</B>()</PRE>
<DL>
<DD><p>Return <code>true</code> if there is <code>wrappedData</code>
 available, and the result of calling <code>absolute()</code> on the
 underlying <code>ResultSet</code>, passing the current value of
 <code>rowIndex</code> plus one (to account for the fact that
 <code>ResultSet</code> uses one-relative indexing), returns
 <code>true</code>.  Otherwise, return <code>false</code>.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#isRowAvailable()">isRowAvailable</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javax/faces/FacesException.html" title="class in javax.faces">FacesException</A></CODE> - if an error occurs getting the row availability</DL>
</DD>
</DL>
<HR>

<A NAME="getRowCount()"><!-- --></A><H3>
getRowCount</H3>
<PRE>
public int <B>getRowCount</B>()</PRE>
<DL>
<DD><p>Return -1, since <code>ResultSet</code> does not provide a
 standard way to determine the number of available rows without
 scrolling through the entire <code>ResultSet</code>, and this can
 be very expensive if the number of rows is large.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#getRowCount()">getRowCount</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javax/faces/FacesException.html" title="class in javax.faces">FacesException</A></CODE> - if an error occurs getting the row count</DL>
</DD>
</DL>
<HR>

<A NAME="getRowData()"><!-- --></A><H3>
getRowData</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>getRowData</B>()</PRE>
<DL>
<DD><p>If row data is available, return a <code>Map</code> representing
 the values of the columns for the row specified by <code>rowIndex</code>,
 keyed by the corresponding column names.  If no wrapped data is
 available, return <code>null</code>.</p>

 <p>If a non-<code>null</code> <code>Map</code> is returned, its behavior
 must correspond to the contract for a mutable <code>Map</code> as
 described in the JavaDocs for <code>AbstractMap</code>, with the
 following exceptions and specialized behavior:</p>
 <ul>

 <li>The <code>Map</code>, and any supporting objects it returns,
     must perform all column name comparisons in a
     case-insensitive manner.  This case-insensitivity must be
     implemented using a case-insensitive <code>Comparator</code>,
     such as
     <code>String.CASE_INSENSITIVE_ORDER</code>.</li>

 <li>The following methods must throw
     <code>UnsupportedOperationException</code>:  <code>clear()</code>,
     <code>remove()</code>.</li>
 <li>The <code>entrySet()</code> method must return a <code>Set</code>
     that has the following behavior:
     <ul>
     <li>Throw <code>UnsupportedOperationException</code> for any attempt
         to add or remove entries from the <code>Set</code>, either
         directly or indirectly through an <code>Iterator</code>
         returned by the <code>Set</code>.</li>
     <li>Updates to the <code>value</code> of an entry in this
         <code>set</code> must write through to the corresponding
         column value in the underlying <code>ResultSet</code>.</li>
     </ul></li>
 <li>The <code>keySet()</code> method must return a <code>Set</code>
     that throws <code>UnsupportedOperationException</code> on any
     attempt to add or remove keys, either directly or through an
     <code>Iterator</code> returned by the <code>Set</code>.</li>
 <li>The <code>put()</code> method must throw
     <code>IllegalArgumentException</code> if a key value for which
     <code>containsKey()</code> returns <code>false</code> is
     specified.  However, if a key already present in the <code>Map</code>
     is specified, the specified value must write through to the
     corresponding column value in the underlying <code>ResultSet</code>.
     </li>
 <li>The <code>values()</code> method must return a
     <code>Collection</code> that throws
     <code>UnsupportedOperationException</code> on any attempt to add
     or remove values, either directly or through an <code>Iterator</code>
     returned by the <code>Collection</code>.</li>
 </ul>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#getRowData()">getRowData</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javax/faces/FacesException.html" title="class in javax.faces">FacesException</A></CODE> - if an error occurs getting the row data
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if now row data is available
  at the currently specified row index</DL>
</DD>
</DL>
<HR>

<A NAME="getRowIndex()"><!-- --></A><H3>
getRowIndex</H3>
<PRE>
public int <B>getRowIndex</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../javax/faces/model/DataModel.html#getRowIndex()">DataModel</A></CODE></B></DD>
<DD><p>Return the zero-relative index of the currently selected row.  If
 we are not currently positioned on a row, or no <code>wrappedData</code>
 is available, return -1.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#getRowIndex()">getRowIndex</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javax/faces/FacesException.html" title="class in javax.faces">FacesException</A></CODE> - if an error occurs getting the row index</DL>
</DD>
</DL>
<HR>

<A NAME="setRowIndex(int)"><!-- --></A><H3>
setRowIndex</H3>
<PRE>
public void <B>setRowIndex</B>(int&nbsp;rowIndex)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../javax/faces/model/DataModel.html#setRowIndex(int)">DataModel</A></CODE></B></DD>
<DD><p>Set the zero-relative index of the currently selected row, or -1
 to indicate that we are not positioned on a row.  It is
 possible to set the row index at a value for which the underlying data
 collection does not contain any row data.  Therefore, callers may
 use the <code>isRowAvailable()</code> method to detect whether row data
 will be available for use by the <code>getRowData()</code> method.</p>

 <p>If there is no <code>wrappedData</code> available when this method
 is called, the specified <code>rowIndex</code> is stored (and may be
 retrieved by a subsequent call to <code>getRowData()</code>), but no
 event is sent.  Otherwise, if the currently selected row index is
 changed by this call, a <A HREF="../../../javax/faces/model/DataModelEvent.html" title="class in javax.faces.model"><CODE>DataModelEvent</CODE></A> will be sent to the
 <code>rowSelected()</code> method of all registered
 <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A>s.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#setRowIndex(int)">setRowIndex</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rowIndex</CODE> - The new zero-relative index (must be non-negative)
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../javax/faces/FacesException.html" title="class in javax.faces">FacesException</A></CODE> - if an error occurs setting the row index
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>rowIndex</code>
  is less than -1</DL>
</DD>
</DL>
<HR>

<A NAME="getWrappedData()"><!-- --></A><H3>
getWrappedData</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>getWrappedData</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../javax/faces/model/DataModel.html#getWrappedData()">DataModel</A></CODE></B></DD>
<DD><p>Return the object representing the data wrapped by this
 <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>, if any.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#getWrappedData()">getWrappedData</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setWrappedData(java.lang.Object)"><!-- --></A><H3>
setWrappedData</H3>
<PRE>
public void <B>setWrappedData</B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;data)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../javax/faces/model/DataModel.html#setWrappedData(java.lang.Object)">DataModel</A></CODE></B></DD>
<DD><p>Set the object representing the data collection wrapped by this
 <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>.  If the specified <code>data</code> is
 <code>null</code>, detach this <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A> from any previously
 wrapped data collection instead.</p>

 <p>If <code>data</code> is non-<code>null</code>, the currently selected
 row index must be set to zero, and a <A HREF="../../../javax/faces/model/DataModelEvent.html" title="class in javax.faces.model"><CODE>DataModelEvent</CODE></A> must be sent
 to the <code>rowSelected()</code> method of all registered
 <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A>s indicating that this row is now selected.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../javax/faces/model/DataModel.html#setWrappedData(java.lang.Object)">setWrappedData</A></CODE> in class <CODE><A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model">DataModel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - Data collection to be wrapped, or <code>null</code> to
  detach from any previous data collection
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/ClassCastException.html" title="class or interface in java.lang">ClassCastException</A></CODE> - if <code>data</code> is not of the
  appropriate type for this <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A> implementation</DL>
</DD>
</DL>
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