Package org.codehaus.plexus.interpolation.reflection

Class ReflectionValueExtractor

java.lang.Object

org.codehaus.plexus.interpolation.reflection.ReflectionValueExtractor

public class ReflectionValueExtractor
extends java.lang.Object

NOTE: This class was copied from plexus-utils, to allow this library to stand completely self-contained.

Using simple dotted expressions extract the values from a MavenProject instance, For example we might want to extract a value like: project.build.sourceDirectory

Author:

Jason van Zyl

Method Summary

Modifier and Type	Method	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

trimRootToken - trim the token or not.

Returns:

the object defined by the expression

Throws:

java.lang.Exception - if any