datamodel.html

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<A NAME="DataModel()"><!-- --></A><H3>
DataModel</H3>
<PRE>
public <B>DataModel</B>()</PRE>
<DL>
</DL>

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<A NAME="isRowAvailable()"><!-- --></A><H3>
isRowAvailable</H3>
<PRE>
public abstract boolean <B>isRowAvailable</B>()</PRE>
<DL>
<DD><p>Return a flag indicating whether there is <code>rowData</code>
 available at the current <code>rowIndex</code>.  If no
 <code>wrappedData</code> is available, return <code>false</code>.</p>
<P>
<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 abstract int <B>getRowCount</B>()</PRE>
<DL>
<DD><p>Return the number of rows of data objects represented by this
 <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>.  If the number of rows is unknown, or no
 <code>wrappedData</code> is available, return -1.</p>
<P>
<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 abstract <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>Return an object representing the data for the currenty selected
 row index.  If no <code>wrappedData</code> is available, return
 <code>null</code>.</p>
<P>
<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 abstract int <B>getRowIndex</B>()</PRE>
<DL>
<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>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 abstract void <B>setRowIndex</B>(int&nbsp;rowIndex)</PRE>
<DL>
<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>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 abstract <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><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>
</DL>
</DD>
</DL>
<HR>

<A NAME="setWrappedData(java.lang.Object)"><!-- --></A><H3>
setWrappedData</H3>
<PRE>
public abstract 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><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>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>
<HR>

<A NAME="addDataModelListener(javax.faces.model.DataModelListener)"><!-- --></A><H3>
addDataModelListener</H3>
<PRE>
public void <B>addDataModelListener</B>(<A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model">DataModelListener</A>&nbsp;listener)</PRE>
<DL>
<DD><p>Add a new <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A> to the set interested in
 notifications from this <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>.</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - The new <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A> to be registered
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/NullPointerException.html" title="class or interface in java.lang">NullPointerException</A></CODE> - if <code>listener</code>
  is <code>null</code></DL>
</DD>
</DL>
<HR>

<A NAME="getDataModelListeners()"><!-- --></A><H3>
getDataModelListeners</H3>
<PRE>
public <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model">DataModelListener</A>[] <B>getDataModelListeners</B>()</PRE>
<DL>
<DD><p>Return the set of <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A>s interested in
 notifications from this <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>.  If there are no such
 listeners, an empty array is returned.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="removeDataModelListener(javax.faces.model.DataModelListener)"><!-- --></A><H3>
removeDataModelListener</H3>
<PRE>
public void <B>removeDataModelListener</B>(<A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model">DataModelListener</A>&nbsp;listener)</PRE>
<DL>
<DD><p>Remove an existing <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A> from the set
 interested in notifications from this <A HREF="../../../javax/faces/model/DataModel.html" title="class in javax.faces.model"><CODE>DataModel</CODE></A>.</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - The old <A HREF="../../../javax/faces/model/DataModelListener.html" title="interface in javax.faces.model"><CODE>DataModelListener</CODE></A> to be deregistered
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/NullPointerException.html" title="class or interface in java.lang">NullPointerException</A></CODE> - if <code>listener</code>
  is <code>null</code></DL>
</DD>
</DL>
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