javax.faces.model.ArrayDataModel Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of javax.faces Show documentation
Show all versions of javax.faces Show documentation
This is the master POM file for Oracle's Implementation of the JSF 2.1 Specification.
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. 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_1_1.html
* or packager/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 packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [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;
/**
* ArrayDataModel is a convenience implementation of
* {@link DataModel} that wraps an array of Java objects.
*/
public class ArrayDataModel extends DataModel {
// ------------------------------------------------------------ Constructors
/**
* Construct a new {@link ArrayDataModel} with no specified
* wrapped data.
*/
public ArrayDataModel() {
this(null);
}
/**
* Construct a new {@link ArrayDataModel} wrapping the specified
* array.
*
* @param array Array to be wrapped (if any)
*/
public ArrayDataModel(E[] array) {
super();
setWrappedData(array);
}
// ------------------------------------------------------ Instance Variables
// The array we are wrapping
private Object array[];
// The current row index (zero relative)
private int index = -1;
// -------------------------------------------------------------- Properties
/**
* Return true
if there is wrappedData
* available, and the current value of rowIndex
is greater
* than or equal to zero, and less than the length of the array. Otherwise,
* return false
.
*
* @throws javax.faces.FacesException if an error occurs getting the row availability
*/
public boolean isRowAvailable() {
if (array == null) {
return (false);
} else if ((index >= 0) && (index < array.length)) {
return (true);
} else {
return (false);
}
}
/**
* If there is wrappedData
available, return the
* length of the array. If no wrappedData
is available,
* return -1.
*
* @throws javax.faces.FacesException if an error occurs getting the row count
*/
public int getRowCount() {
if (array == null) {
return (-1);
}
return (array.length);
}
/**
* If row data is available, return the array element at the index
* specified by rowIndex
. If no wrapped data is available,
* return null
.
*
* @throws javax.faces.FacesException if an error occurs getting the row data
* @throws IllegalArgumentException if now row data is available
* at the currently specified row index
*/
@SuppressWarnings({"unchecked"})
public E getRowData() {
if (array == null) {
return (null);
} else if (!isRowAvailable()) {
throw new NoRowAvailableException();
} else {
return ((E) array[index]);
}
}
/**
* @throws javax.faces.FacesException {@inheritDoc}
*/
public int getRowIndex() {
return (index);
}
/**
* @throws javax.faces.FacesException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
*/
public void setRowIndex(int rowIndex) {
if (rowIndex < -1) {
throw new IllegalArgumentException();
}
int old = index;
index = rowIndex;
if (array == 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.array);
}
/**
* @throws ClassCastException if data
is
* non-null
and is not an array of Java objects.
*/
public void setWrappedData(Object data) {
if (data == null) {
array = null;
setRowIndex(-1);
} else {
array = (Object[]) data;
index = -1;
setRowIndex(0);
}
}
}