Class ReflectionValueExtractor

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

public class ReflectionValueExtractor extends 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.

Author:
Jason van Zyl , Vincent Siveton
See Also:
  • Method Details

    • evaluate

      public static Object evaluate(String expression, Object root) throws 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:
      Exception - if any
    • evaluate

      public static Object evaluate(String expression, Object root, boolean trimRootToken) throws 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 - root start
      Returns:
      the object defined by the expression
      Throws:
      Exception - if any