sort on column header
Hi
I am new to JSF
I am reading the Core Java Server Faces book
I have a problem with column sorting program when I click the column header link it's not calling the sortBLast method ,could anybody help me please
here is the bean Name.java
publicclass Name{
private String first;
private String last;
privateboolean editable;
public Name(String first, String last){
this.first = first;
this.last = last;
}
publicvoid setFirst(String newValue){
first = newValue;
}
public String getFirst(){
return first;
}
publicvoid setLast(String newValue){
last = newValue;
}
public String getLast(){
return last;
}
publicboolean isEditable(){
return editable;
}
publicvoid setEditable(boolean newValue){
editable = newValue;
}
}
<--TableData.java -->
package com.corejsf;
import javax.faces.model.DataModel;
import javax.faces.model.ArrayDataModel;
publicclass TableData{
private DataModel filterModel =null;
privatestaticfinal Name[] names ={
new Name("Anna","Keeney"),
new Name("John","Wilson"),
new Name("Mariko","Randor"),
new Name("William","Dupont"),
};
public TableData(){
ArrayDataModel model =new ArrayDataModel(names);
filterModel =new SortFilterModel(model);
}
public DataModel getNames(){
return filterModel;
}
}
<-- here is theSortFilterModel.java -->
package com.corejsf;
import java.util.Arrays;
import java.util.Comparator;
import javax.faces.model.DataModel;
import javax.faces.model.DataModelListener;
publicclass SortFilterModelextends DataModel{
private DataModel model;
private Row[] rows;
privatestatic Comparator byLast =new
Comparator(){
publicint compare(Object o1, Object o2){
Row r1 = (Row) o1;
Row r2 = (Row) o2;
Name n1 = (Name) r1.getData();
Name n2 = (Name) r2.getData();
return n1.getLast().compareTo(n2.getLast());
}
};
privatestatic Comparator byFirst =new
Comparator(){
publicint compare(Object o1, Object o2){
Row r1 = (Row) o1;
Row r2 = (Row) o2;
Name n1 = (Name) r1.getData();
Name n2 = (Name) r2.getData();
return n1.getFirst().compareTo(n2.getFirst());
}
};
privateclass Row{
privateint row;
public Row(int row){
this.row = row;
}
public Object getData(){
int originalIndex = model.getRowIndex();
model.setRowIndex(row);
Object thisRowData = model.getRowData();
model.setRowIndex(originalIndex);
return thisRowData;
}
}
public SortFilterModel(DataModel model){
this.model = model;
int rowCnt = model.getRowCount();
if(rowCnt != -1){
rows =new Row[rowCnt];
for(int i=0; i < rowCnt; ++i){
rows[i] =new Row(i);
}
}
}
public String sortByLast(){
Arrays.sort(rows, byLast);
returnnull;
}
public String sortByFirst(){
Arrays.sort(rows, byFirst);
returnnull;
}
publicvoid setRowIndex(int rowIndex){
if(rowIndex == -1 || rowIndex >= model.getRowCount()){
model.setRowIndex(rowIndex);
}
else{
model.setRowIndex(rows[rowIndex].row);
}
}
// The following methods delegate directly to the
// decorated model
publicboolean isRowAvailable(){
return model.isRowAvailable();
}
publicint getRowCount(){
return model.getRowCount();
}
public Object getRowData(){
return model.getRowData();
}
publicint getRowIndex(){
return model.getRowIndex();
}
public Object getWrappedData(){
return model.getWrappedData();
}
publicvoid setWrappedData(Object data){
model.setWrappedData(data);
}
publicvoid addDataModelListener(DataModelListener listener){
model.addDataModelListener(listener);
}
public DataModelListener[] getDataModelListeners(){
return model.getDataModelListeners();
}
publicvoid removeDataModelListener(DataModelListener listener){
model.removeDataModelListener(listener);
}
}
here is the index.jsp page
<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<f:view>
<head>
<link href="styles.css" rel="stylesheet" type="text/css"/>
<f:loadBundle basename="com.messages" var="msgs"/>
<title>
<h:outputText value="#{msgs.windowTitle}"/>
</title>
</head>
<body>
<h:form>
<h:dataTable value="#{tableData.names}" var="name"
styleClass="names" headerClass="namesHeader"
columnClasses="last,first">
<h:column>
<f:facet name="header">
<h:commandLink action="#{tableData.names.sortByLast}" onkeypress="submit();" >
<h:outputText value="#{msgs.lastColumnHeader}"/>
</h:commandLink>
</f:facet>
<h:outputText value="#{name.last}"/>
<f:verbatim>,</f:verbatim>
</h:column>
<h:column>
<f:facet name="header">
<h:commandLink action="#{tableData.names.sortByFirst}">
<h:outputText value="#{msgs.firstColumnHeader}"/>
</h:commandLink>
</f:facet>
<h:outputText value="#{name.first}"/>
</h:column>
</h:dataTable>
</h:form>
</body>
</f:view>
</html>
here is the faces-config.xml bean configuration
<managed-bean>
<managed-bean-name>tableData</managed-bean-name>
<managed-bean-class>com.corejsf.TableData</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<-- messages.properties file -->
name=Hello World
windowTitle=Sorting Java Beans
pageTitle=An array of names:
firstColumnHeader=First Name
lastColumnHeader=Last Name
lastnameColumn=Last Name
firstnameColumn=First Name
