/*****************************************************************************
* Licensed to the Apache Software Foundation (ASF) under one *
* or more contributor license agreements. See the NOTICE file *
* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you under the Apache License, Version 2.0 (the *
* "License"); you may not use this file except in compliance *
* with the License. You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, *
* software distributed under the License is distributed on an *
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
* KIND, either express or implied. See the License for the *
* specific language governing permissions and limitations *
* under the License. *
* *
* *
* This file is part of the BeanShell Java Scripting distribution. *
* Documentation and updates may be found at http://www.beanshell.org/ *
* Patrick Niemeyer (pat@pat.net) *
* Author of Learning Java, O'Reilly & Associates *
* *
*****************************************************************************/
package bsh;
public class
DelayedEvalBshMethod extends
BshMethod
{
String returnTypeDescriptor;
BSHReturnType returnTypeNode;
String []
paramTypeDescriptors;
BSHFormalParameters paramTypesNode;
// used for the delayed evaluation...
transient
CallStack callstack;
transient
Interpreter interpreter;
/**
This constructor is used in class generation. It supplies String type
descriptors for return and parameter class types and allows delay of
the evaluation of those types until they are requested. It does this
by holding BSHType nodes, as well as an evaluation callstack, and
interpreter which are called when the class types are requested.
*/
/*
Note: technically I think we could get by passing in only the
current namespace or perhaps BshClassManager here instead of
CallStack and Interpreter. However let's just play it safe in case
of future changes - anywhere you eval a node you need these.
*/
DelayedEvalBshMethod(
String name,
String returnTypeDescriptor,
BSHReturnType returnTypeNode,
String []
paramNames,
String []
paramTypeDescriptors,
BSHFormalParameters paramTypesNode,
BSHBlock methodBody,
NameSpace declaringNameSpace,
Modifiers modifiers,
CallStack callstack,
Interpreter interpreter
) {
super(
name, null/*returnType*/,
paramNames, null/*paramTypes*/,
methodBody,
declaringNameSpace,
modifiers );
this.
returnTypeDescriptor =
returnTypeDescriptor;
this.
returnTypeNode =
returnTypeNode;
this.
paramTypeDescriptors =
paramTypeDescriptors;
this.
paramTypesNode =
paramTypesNode;
this.
callstack =
callstack;
this.
interpreter =
interpreter;
}
public
String getReturnTypeDescriptor() { return
returnTypeDescriptor; }
public
Class getReturnType()
{
if (
returnTypeNode == null )
return null;
// BSHType will cache the type for us
try {
return
returnTypeNode.
evalReturnType(
callstack,
interpreter );
} catch (
EvalError e ) {
throw new
InterpreterError("can't eval return type: "+
e);
}
}
public
String []
getParamTypeDescriptors() { return
paramTypeDescriptors; }
public
Class []
getParameterTypes()
{
// BSHFormalParameters will cache the type for us
try {
return (
Class [])
paramTypesNode.
eval(
callstack,
interpreter );
} catch (
EvalError e ) {
throw new
InterpreterError("can't eval param types: "+
e);
}
}
}