Class ObjectBasedValueSource
- java.lang.Object
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- org.codehaus.plexus.interpolation.AbstractValueSource
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- org.codehaus.plexus.interpolation.ObjectBasedValueSource
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- All Implemented Interfaces:
ValueSource
public class ObjectBasedValueSource extends AbstractValueSource
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.
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Field Summary
Fields Modifier and Type Field Description private java.lang.Object
root
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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.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
getValue(java.lang.String expression)
Split the expression into parts, tokenized on the dot ('.') character.-
Methods inherited from class org.codehaus.plexus.interpolation.AbstractValueSource
addFeedback, addFeedback, clearFeedback, getFeedback
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Constructor Detail
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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.
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Method Detail
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getValue
public java.lang.Object getValue(java.lang.String expression)
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.- Parameters:
expression
- The string expression.- Returns:
- the value related to the expression, or null if not found.
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