WordCountServiceProviderpublic final class WordCountServiceProvider extends Object implements BeanContextServiceProvider| This class is the factory that delivers a word counting service.
The 3 methods defined in this class are the concrete implementations
of the BeanContextServiceProvider interface. For this demonstration, the primary
method of interest is getService(). The getService() methods returns a new
WordCount instance. It is called by the bean context when a nested
JavaBean requests the service. |
| Methods Summary |
|---|
| public java.util.Iterator | getCurrentServiceSelectors(java.beans.beancontext.BeanContextServices bcs, java.lang.Class serviceClass)
return null; // do nothing
| | public java.lang.Object | getService(java.beans.beancontext.BeanContextServices bcs, java.lang.Object requestor, java.lang.Class serviceClass, java.lang.Object serviceSelector)
// For this demo, we know that the cast from serviceSelector
// to File will always work.
final File document = (File)serviceSelector;
/* Return an instance of the service. The service itself is
* the WordCount interface, which is implemented here using
* an anonymous inner class.
*/
return new WordCount() {
public void countWords() {
try {
// Create a Reader to the DocumentBean's File
BufferedReader br = new BufferedReader(new FileReader(document));
String line = null;
int wordCount = 0;
while ((line = br.readLine()) != null) {
StringTokenizer st = new StringTokenizer(line);
while (st.hasMoreTokens()) {
System.out.println("Word " + (++wordCount)
+ " is: " + st.nextToken());
}
}
System.out.println("Total number of words in the document: "
+ wordCount);
System.out.println("[WordCount service brought to you by WordCountServiceProvider]");
br.close();
} catch(Exception e) { }
}
};
| | public void | releaseService(java.beans.beancontext.BeanContextServices bcs, java.lang.Object requestor, java.lang.Object service)
// do nothing
|
|
