DynamicVisitor

java.lang.Object
- org.onemind.commons.java.pattern.DynamicVisitor

```
public abstract class DynamicVisitor
extends java.lang.Object
```
An abstract implementation of visitor that is extensible for handling different kind of object nodes by simple adding more methods. The subclass need to set up for handlers of node type in the constructor.

Version:

$Id: DynamicVisitor.java,v 1.2 2004/10/31 16:02:08 thlee Exp $ $Name: $

Author:

TiongHiang Lee (thlee@onemindsoft.org)

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`DynamicVisitor.MethodNodeHandler` A handler use reflection to invoke given method for visiting
`static interface`	`DynamicVisitor.NodeHandler` The handler

Field Summary

Fields
Modifier and Type	Field and Description
`private InheritableValueMap`	`_handlers` contains the handlers for different kind of nodese
`private static java.lang.Class`	`OBJECT_ARRAY_CLASS` the object array class

Constructor Summary

Constructors
Constructor and Description

DynamicVisitor()
Constructor

Constructors
Constructor and Description
`DynamicVisitor()` Constructor

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`addMethodNodeHandler(java.lang.Class type, java.lang.String methodName)` Add MethodNodeHandler using the given method name throws RuntimeException if the method cannot be found.
`protected void`	`addNodeHandler(java.lang.Class type, DynamicVisitor.NodeHandler handler)` Add node handler
`protected abstract void`	`initNodeHandlers()` Initialize the node handlers
`java.lang.Object`	`visit(java.lang.Object obj, java.lang.Object[] args)` The object

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- OBJECT_ARRAY_CLASS
```
private static java.lang.Class OBJECT_ARRAY_CLASS
```
  the object array class
- _handlers
```
private final InheritableValueMap _handlers
```
  contains the handlers for different kind of nodese

Constructor Detail
- DynamicVisitor
```
public DynamicVisitor()
```
  Constructor

Method Detail

initNodeHandlers

protected abstract void initNodeHandlers()

Initialize the node handlers

addNodeHandler

protected void addNodeHandler(java.lang.Class type,
                              DynamicVisitor.NodeHandler handler)

Add node handler

Parameters:: type - the type; handler - the handler

addMethodNodeHandler
```
protected void addMethodNodeHandler(java.lang.Class type,
                                    java.lang.String methodName)
```
Add MethodNodeHandler using the given method name throws RuntimeException if the method cannot be found.

Parameters:

type - the type

methodName - the method name

visit

public java.lang.Object visit(java.lang.Object obj,
                              java.lang.Object[] args)
                       throws java.lang.Exception

The object

Parameters:: obj - the object; args - the arguments
Throws:: java.lang.Exception

Class DynamicVisitor

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

OBJECT_ARRAY_CLASS

_handlers

Constructor Detail

DynamicVisitor

Method Detail

initNodeHandlers

addNodeHandler

addMethodNodeHandler

visit