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

Version:

$Id$

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.Class<?>[]	CLASS_ARGS
private static java.util.Map<java.lang.Class<?>,java.lang.ref.WeakReference<ClassMap>>	classMaps Use a WeakHashMap here, so the keys (Class objects) can be garbage collected.
private static java.lang.Object[]	OBJECT_ARGS

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ReflectionValueExtractor()

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	evaluate(java.lang.String expression, java.lang.Object root)
static java.lang.Object	evaluate(java.lang.String expression, java.lang.Object root, boolean trimRootToken)
private static ClassMap	getClassMap(java.lang.Class<?> clazz)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CLASS_ARGS

private static final java.lang.Class<?>[] CLASS_ARGS

OBJECT_ARGS

private static final java.lang.Object[] OBJECT_ARGS

classMaps

private static final java.util.Map<java.lang.Class<?>,java.lang.ref.WeakReference<ClassMap>> classMaps

Use a WeakHashMap here, so the keys (Class objects) can be garbage collected. This approach prevents permgen space overflows due to retention of discarded classloaders.

Constructor Detail

ReflectionValueExtractor

private ReflectionValueExtractor()

Method Detail

evaluate

public static java.lang.Object evaluate(java.lang.String expression,
                                        java.lang.Object root)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

evaluate

public static java.lang.Object evaluate(java.lang.String expression,
                                        java.lang.Object root,
                                        boolean trimRootToken)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

getClassMap

private static ClassMap getClassMap(java.lang.Class<?> clazz)