java.beans
Class Expression
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.
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], ...);
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
Expression
public 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.
Instead, value will always be returned.
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
public Expression(Object target,
String methodName,
Object[] arguments) Constructor Constructs an Expression representing the invocation of
object.methodName(arg[0], arg[1], ...);
target - The object to invoke the method on.methodName - The object method to invoke.arguments - An array of arguments to pass to the method.
getValue
public Object getValue()
throws Exception 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.
- the result of executing the method.
setValue
public void setValue(Object value)
Set the cached value to be returned by getValue()
value - the value to cache and return.
java.beans.Expression
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