Package org.codehaus.plexus.interpolation.fixed

Class ObjectBasedValueSource

java.lang.Object

org.codehaus.plexus.interpolation.fixed.ObjectBasedValueSource

All Implemented Interfaces:

FixedValueSource

public class ObjectBasedValueSource
extends java.lang.Object
implements FixedValueSource

Wraps an object, providing reflective access to the object graph of which the supplied object is the root. Expressions like 'child.name' will translate into 'rootObject.getChild().getName()' for non-boolean properties, and 'rootObject.getChild().isName()' for boolean properties.

Constructor Summary

Constructors

Constructor	Description
ObjectBasedValueSource(java.lang.Object root)	Construct a new value source, using the supplied object as the root from which to start, and using expressions split at the dot ('.') to navigate the object graph beneath this root.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	getValue(java.lang.String expression, InterpolationState interpolationState)	Split the expression into parts, tokenized on the dot ('.') character.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectBasedValueSource

public ObjectBasedValueSource(java.lang.Object root)

Construct a new value source, using the supplied object as the root from which to start, and using expressions split at the dot ('.') to navigate the object graph beneath this root.

Parameters:

root - The root of the graph.

Method Detail

getValue

public java.lang.Object getValue(java.lang.String expression,
                                 InterpolationState interpolationState)

Split the expression into parts, tokenized on the dot ('.') character. Then, starting at the root object contained in this value source, apply each part to the object graph below this root, using either 'getXXX()' or 'isXXX()' accessor types to resolve the value for each successive expression part. Finally, return the result of the last expression part's resolution.

NOTE: The object-graph nagivation actually takes place via the ReflectionValueExtractor class.

Specified by:

getValue in interface FixedValueSource

Parameters:

expression - The expression.

interpolationState - InterpolationState.

Returns:

the value related to the expression, or null if not found (not available from this source)