org.apache.turbine.modules
Class PageLoader

java.lang.Object
  |
  +--java.util.Dictionary
        |
        +--java.util.Hashtable
              |
              +--org.apache.turbine.modules.GenericLoader
                    |
                    +--org.apache.turbine.modules.PageLoader
All Implemented Interfaces:
java.lang.Cloneable, java.util.Map, java.io.Serializable

public class PageLoader
extends GenericLoader

The purpose of this class is to allow one to load and execute Page modules.

Version:
$Id$
Author:
Dave Bryson
See Also:
Serialized Form

Inner classes inherited from class java.util.Map
java.util.Map.Entry
 
Field Summary
private static PageLoader instance
          The single instance of this class.
 
Fields inherited from class org.apache.turbine.modules.GenericLoader
CACHE, reload, TURBINE_PACKAGE
 
Fields inherited from class java.util.Hashtable
count, emptyEnumerator, emptyIterator, ENTRIES, entrySet, KEYS, keySet, loadFactor, modCount, serialVersionUID, table, threshold, values, VALUES
 
Constructor Summary
private PageLoader()
          These ctor's are private to force clients to use getInstance() to access this class.
private PageLoader(int i)
          These ctor's are private to force clients to use getInstance() to access this class.
 
Method Summary
private  void addInstance(java.lang.String name, Page page)
          Adds an instance of an object into the hashtable.
 void exec(RunData data, java.lang.String name)
          Attempts to load and execute the external page.
static PageLoader getInstance()
          The method through which this class is accessed.
 Page getInstance(java.lang.String name)
          Pulls out an instance of the object by name.
 
Methods inherited from class org.apache.turbine.modules.GenericLoader
cache, getBasePackage, reload, setReload
 
Methods inherited from class java.util.Hashtable
, clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, getEnumeration, getIterator, hashCode, isEmpty, keys, keySet, put, putAll, readObject, rehash, remove, size, toString, values, writeObject
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, registerNatives, wait, wait, wait
 

Field Detail

instance

private static PageLoader instance
The single instance of this class.
Constructor Detail

PageLoader

private PageLoader()
These ctor's are private to force clients to use getInstance() to access this class.

PageLoader

private PageLoader(int i)
These ctor's are private to force clients to use getInstance() to access this class.
Method Detail

addInstance

private void addInstance(java.lang.String name,
                         Page page)
Adds an instance of an object into the hashtable.
Parameters:
name - Name of object.
page - Page to be associated with name.

exec

public void exec(RunData data,
                 java.lang.String name)
          throws java.lang.Exception
Attempts to load and execute the external page.
Overrides:
exec in class GenericLoader
Parameters:
data - Turbine information.
name - Name of object that will execute the page.
Throws:
java.lang.Exception - a generic exception.

getInstance

public Page getInstance(java.lang.String name)
                 throws java.lang.Exception
Pulls out an instance of the object by name. Name is just the single name of the object.
Parameters:
name - Name of object instance.
Returns:
A Page with the specified name, or null.
Throws:
java.lang.Exception - a generic exception.

getInstance

public static PageLoader getInstance()
The method through which this class is accessed.
Returns:
The single instance of this class.


Copyright © 1999-2001 Apache Software Foundation. All Rights Reserved.