Expression (GNU Classpath 0.94-pre Documentation)

Class Expression

public class Expression extends Statement

An Expression captures the execution of an object method that returns a value.

It stores an object, the method to call, and the arguments to pass to the method.

While this class can generally be used to describe method calls it is part of the XML serialization API.

Since: 1.4

Constructor Summary
	Expression(Object value, Object target, String methodName, Object[] arguments) Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...); However, it will never be executed.
	Expression(Object target, String methodName, Object[] arguments) Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...);

Expression(Object value, Object target, String methodName, Object[] arguments)

Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...); However, it will never be executed.

Expression(Object target, String methodName, Object[] arguments)

Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...);

Method Summary
Object	getValue() Return the result of executing the method.
void	setValue(Object value) Set the cached value to be returned by getValue()
String	toString() Return a string representation of this expression.

Method Summary

Object

getValue()

Return the result of executing the method.

void

setValue(Object value)

Set the cached value to be returned by getValue()

String

toString()

Return a string representation of this expression.

Constructor Detail

Expression

Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...); However, it will never be executed. Instead, value will always be returned.

Parameters: value The value to return. target The object to invoke the method on. methodName The object method to invoke. arguments An array of arguments to pass to the method.

Expression

Constructor Constructs an Expression representing the invocation of object.methodName(arg[0], arg[1], ...);

Parameters: target The object to invoke the method on. methodName The object method to invoke. arguments An array of arguments to pass to the method.

Method Detail

getValue

Return the result of executing the method. If the cached value has not yet been set, the method is executed in the same way as Statement.execute(), except that the value is cached, and then returned. If the value has been set, it is returned without executing the method again.

Returns: the result of executing the method.

Throws: Exception if an error occurs

setValue

Set the cached value to be returned by getValue()

Parameters: value the value to cache and return.