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This is the master POM file for Sun's Implementation of
the JSF 1.2 Specification.
/*
* $Id: ScalarDataModel.java,v 1.20.4.1 2008/04/20 20:48:30 rlubke Exp $
*/
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.faces.model;
import javax.faces.FacesException;
/**
* ScalarDataModel is a convenience implementation of
* {@link DataModel} that wraps an individual Java object.
*/
public class ScalarDataModel extends DataModel {
// ------------------------------------------------------------ Constructors
/**
* Construct a new {@link ScalarDataModel} with no specified
* wrapped data.
*/
public ScalarDataModel() {
this(null);
}
/**
* Construct a new {@link ScalarDataModel} wrapping the specified
* scalar object.
*
* @param scalar Scalar to be wrapped (if any)
*/
public ScalarDataModel(Object scalar) {
super();
setWrappedData(scalar);
}
// ------------------------------------------------------ Instance Variables
// The currently selected row index (zero-relative)
private int index;
// The scalar we are wrapping
private Object scalar;
// -------------------------------------------------------------- Properties
/**
* Return true if there is wrappedData
* available, and the current value of rowIndex is zero.
* Otherwise, return false.
*
* @throws FacesException if an error occurs getting the row availability
*/
public boolean isRowAvailable() {
if (scalar == null) {
return (false);
} else if (index == 0) {
return (true);
} else {
return (false);
}
}
/**
* If there is wrappedData available, return 1.
* If no wrappedData is available, return -1.
*
* @throws FacesException if an error occurs getting the row count
*/
public int getRowCount() {
if (scalar == null) {
return (-1);
}
return (1);
}
/**
* If wrapped data is available, return the wrapped data instance.
* Otherwise, return null.
*
* @throws FacesException if an error occurs getting the row data
* @throws IllegalArgumentException if now row data is available
* at the currently specified row index
*/
public Object getRowData() {
if (scalar == null) {
return (null);
} else if (!isRowAvailable()) {
throw new NoRowAvailableException();
} else {
return (scalar);
}
}
/**
* @throws FacesException {@inheritDoc}
*/
public int getRowIndex() {
return (index);
}
/**
* @throws FacesException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
*/
public void setRowIndex(int rowIndex) {
if (rowIndex < -1) {
throw new IllegalArgumentException();
}
int old = index;
index = rowIndex;
if (scalar == null) {
return;
}
DataModelListener [] listeners = getDataModelListeners();
if ((old != index) && (listeners != null)) {
Object rowData = null;
if (isRowAvailable()) {
rowData = getRowData();
}
DataModelEvent event =
new DataModelEvent(this, index, rowData);
int n = listeners.length;
for (int i = 0; i < n; i++) {
if (null != listeners[i]) {
listeners[i].rowSelected(event);
}
}
}
}
public Object getWrappedData() {
return (this.scalar);
}
/**
* @throws ClassCastException {@inheritDoc}
*/
public void setWrappedData(Object data) {
if (data == null) {
scalar = null;
setRowIndex(-1);
} else {
scalar = data;
index = -1;
setRowIndex(0);
}
}
}