|
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JSF Application |
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return sObject;
}
catch (Exception exception) {
throw new
ConverterException(exception);
}
}
public String getAsString(FacesContext
facesContext,
UIComponent
uiComponent,
Object obj) {
try {
int total_seconds =
(int)((Integer)obj).intValue();
int hours=(total_seconds)/(60*60);
int rem=(total_seconds)%(60*60);
int minutes=rem/60;
int seconds=rem%60;
String str_hours=””+hours;
String str_minutes=””+minutes;
String str_seconds=””+seconds;
if(hours<10){
str_hours=”0"+hours;
}
if(minutes<10){
str_minutes=”0"+minutes;
}
if(seconds<10){
str_seconds=”0"+seconds;
}
return str_hours + “:” + str_minutes
+ “:” + str_seconds;
}
catch (Exception exception) {
throw new
ConverterException(exception);
}
}
} |
In this class “param” represents the string
provided by the user in the component. This
string is passed to the getAsObject() method.
Now we can use this according to our
requirement of manipulation and return the
appropriate object. “obj” parameter passed
in getAsString() method represents the |
|
converted object in the previous method. This
method is called while displaying in the page.
So return the appropriate String by
manipulating this object. If there is any problem
in this process we can handle it by try and catch
block. An error message is shown to the current
page if conversion is not successful.
Step2: Configure the configuration file
(faces-config.xml). Open this file and add
the following code.
<?xml version=”1.0"?>
<faces-config>
<converter>
<converter-id>TimeConverter</converterid>
<converter-class>TimeConverter</
converter-class>
</converter>
</faces-config> |
Here <converter-id> gives ID to the
converter that will be used in our page and <converter-class> specifies the
implementing class.
Step3: Now, we can code for the page “converter.jsp” where <f:converter> tag
is used to associate the converter to the
component using converter Id attribute.
Value of this attribute is matched with the ID
of the converter specified in the configuration
file.
converter.jsp:
<%@ taglib uri=”http://java.sun.com/jsf/
core” prefix=”f” %>
<%@ taglib uri=”http://java.sun.com/jsf/
html” prefix=”h” %>
<f:view>
<html>
<body>
<h:form>
<b>Please enter the time below :</b><br>
</br>
<h:inputText id=”time”>
|
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Dec
2007 | Java Jazz Up |63 |
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