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Java > Open Source Codes > bsh > BSHMethodInvocation


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3  * This file is part of the BeanShell Java Scripting distribution. *
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12  * The Original Code is BeanShell. The Initial Developer of the Original *
13  * Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
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28  * Patrick Niemeyer (pat@pat.net) *
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32  *****************************************************************************/
33
34
35 package bsh;
36
37 import java.lang.reflect.InvocationTargetException JavaDoc;
38
39 class BSHMethodInvocation extends SimpleNode
40 {
41     BSHMethodInvocation (int id) { super(id); }
42
43     BSHAmbiguousName getNameNode() {
44         return (BSHAmbiguousName)jjtGetChild(0);
45     }
46
47     BSHArguments getArgsNode() {
48         return (BSHArguments)jjtGetChild(1);
49     }
50
51     /**
52         Evaluate the method invocation with the specified callstack and
53         interpreter
54     */
55     public Object JavaDoc eval( CallStack callstack, Interpreter interpreter )
56         throws EvalError
57     {
58         NameSpace namespace = callstack.top();
59         BSHAmbiguousName nameNode = getNameNode();
60
61         // Do not evaluate methods this() or super() in class instance space
62 // (i.e. inside a constructor)
63 if ( namespace.getParent() != null && namespace.getParent().isClass
64             && ( nameNode.text.equals("super") || nameNode.text.equals("this") )
65         )
66             return Primitive.VOID;
67  
68         Name name = nameNode.getName(namespace);
69         Object JavaDoc[] args = getArgsNode().getArguments(callstack, interpreter);
70
71 // This try/catch block is replicated is BSHPrimarySuffix... need to
72 // factor out common functionality...
73 // Move to Reflect?
74 try {
75             return name.invokeMethod( interpreter, args, callstack, this);
76         } catch ( ReflectError e ) {
77             throw new EvalError(
78                 "Error in method invocation: " + e.getMessage(),
79                 this, callstack );
80         } catch ( InvocationTargetException JavaDoc e )
81         {
82             String JavaDoc msg = "Method Invocation "+name;
83             Throwable JavaDoc te = e.getTargetException();
84
85             /*
86                 Try to squeltch the native code stack trace if the exception
87                 was caused by a reflective call back into the bsh interpreter
88                 (e.g. eval() or source()
89             */
90             boolean isNative = true;
91             if ( te instanceof EvalError )
92                 if ( te instanceof TargetError )
93                     isNative = ((TargetError)te).inNativeCode();
94                 else
95                     isNative = false;
96             
97             throw new TargetError( msg, te, this, callstack, isNative );
98         } catch ( UtilEvalError e ) {
99             throw e.toEvalError( this, callstack );
100         }
101     }
102 }
103
104
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