bsh.BSHArguments Maven / Gradle / Ivy
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* This file is part of the BeanShell Java Scripting distribution. *
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* Patrick Niemeyer ([email protected]) *
* Author of Learning Java, O'Reilly & Associates *
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package bsh;
class BSHArguments extends SimpleNode
{
BSHArguments(int id) { super(id); }
/**
This node holds a set of arguments for a method invocation or
constructor call.
Note: arguments are not currently allowed to be VOID.
*/
/*
Disallowing VOIDs here was an easy way to support the throwing of a
more descriptive error message on use of an undefined argument to a
method call (very common). If it ever turns out that we need to
support that for some reason we'll have to re-evaluate how we get
"meta-information" about the arguments in the various invoke() methods
that take Object []. We could either pass BSHArguments down to
overloaded forms of the methods or throw an exception subtype
including the argument position back up, where the error message would
be compounded.
*/
public Object[] getArguments( CallStack callstack, Interpreter interpreter)
throws EvalError
{
// evaluate each child
Object[] args = new Object[jjtGetNumChildren()];
for(int i = 0; i < args.length; i++)
{
args[i] = ((SimpleNode)jjtGetChild(i)).eval(callstack, interpreter);
if ( args[i] == Primitive.VOID )
throw new EvalError( "Undefined argument: " +
((SimpleNode)jjtGetChild(i)).getText(), this, callstack );
}
return args;
}
}