ReflectionValueExtractor (plexus-utils API)

java.lang.Object
- org.codehaus.plexus.util.introspection.ReflectionValueExtractor

```
public class ReflectionValueExtractor
extends java.lang.Object
```
Using simple dotted expressions to extract the values from an Object instance, For example we might want to extract a value like: project.build.sourceDirectory

The implementation supports indexed, nested and mapped properties similar to the JSP way.

Version:

$Id: ReflectionValueExtractor.java 8010 2009-01-07 12:59:50Z vsiveton $

Author:

Jason van Zyl , Vincent Siveton

See Also:

http://struts.apache.org/1.x/struts-taglib/indexedprops.html

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static java.lang.Object`	`evaluate(java.lang.String expression, java.lang.Object root)` The implementation supports indexed, nested and mapped properties.
`static java.lang.Object`	`evaluate(java.lang.String expression, java.lang.Object root, boolean trimRootToken)` The implementation supports indexed, nested and mapped properties.

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

- Method Detail
  - evaluate
```
public static java.lang.Object evaluate(java.lang.String expression,
                                        java.lang.Object root)
                                 throws java.lang.Exception
```
    The implementation supports indexed, nested and mapped properties.
    - nested properties should be defined by a dot, i.e. "user.address.street"
    - indexed properties (java.util.List or array instance) should be contains (\\w+)\\[(\\d+)\\] pattern, i.e. "user.addresses[1].street"
    - mapped properties should be contains (\\w+)\$(.+)\$ pattern, i.e. "user.addresses(myAddress).street"
    Parameters:
    
    expression - not null expression
    
    root - not null object
    
    Returns:
    
    the object defined by the expression
    
    Throws:
    
    java.lang.Exception - if any
  - evaluate
```
public static java.lang.Object evaluate(java.lang.String expression,
                                        java.lang.Object root,
                                        boolean trimRootToken)
                                 throws java.lang.Exception
```
    The implementation supports indexed, nested and mapped properties.
    - nested properties should be defined by a dot, i.e. "user.address.street"
    - indexed properties (java.util.List or array instance) should be contains (\\w+)\\[(\\d+)\\] pattern, i.e. "user.addresses[1].street"
    - mapped properties should be contains (\\w+)\$(.+)\$ pattern, i.e. "user.addresses(myAddress).street"
    Parameters:
    
    expression - not null expression
    
    root - not null object
    
    Returns:
    
    the object defined by the expression
    
    Throws:
    
    java.lang.Exception - if any

Class ReflectionValueExtractor

Method Summary

Methods inherited from class java.lang.Object

Method Detail

evaluate

evaluate