org.apache.tools.ant.util

Class ReflectUtil

public class ReflectUtil extends Object

Utility class to handle reflection on java objects. The class contains static methods to call reflection methods, catch any exceptions, converting them to BuildExceptions.
Method Summary
static ObjectgetField(Object obj, String fieldName)
Get the value of a field in an object.
static Objectinvoke(Object obj, String methodName)
Call a method on the object with no parameters.
static Objectinvoke(Object obj, String methodName, Class argType, Object arg)
Call a method on the object with one argument.
static Objectinvoke(Object obj, String methodName, Class argType1, Object arg1, Class argType2, Object arg2)
Call a method on the object with two argument.
static voidthrowBuildException(Exception t)
A method to convert an invocationTargetException to a buildexception and throw it.

Method Detail

getField

public static Object getField(Object obj, String fieldName)
Get the value of a field in an object.

Parameters: obj the object to look at. fieldName the name of the field in the object.

Returns: the value of the field.

Throws: BuildException if there is an error.

invoke

public static Object invoke(Object obj, String methodName)
Call a method on the object with no parameters.

Parameters: obj the object to invoke the method on. methodName the name of the method to call

Returns: the object returned by the method

invoke

public static Object invoke(Object obj, String methodName, Class argType, Object arg)
Call a method on the object with one argument.

Parameters: obj the object to invoke the method on. methodName the name of the method to call argType the type of argument. arg the value of the argument.

Returns: the object returned by the method

invoke

public static Object invoke(Object obj, String methodName, Class argType1, Object arg1, Class argType2, Object arg2)
Call a method on the object with two argument.

Parameters: obj the object to invoke the method on. methodName the name of the method to call argType1 the type of the first argument. arg1 the value of the first argument. argType2 the type of the second argument. arg2 the value of the second argument.

Returns: the object returned by the method

throwBuildException

public static void throwBuildException(Exception t)
A method to convert an invocationTargetException to a buildexception and throw it.

Parameters: t the invocation target exception.

Throws: BuildException the converted exception.