/jEdit/tags/jedit-4-2-pre14/bsh/BSHTypedVariableDeclaration.java

/*****************************************************************************
 *                                                                           *
 *  This file is part of the BeanShell Java Scripting distribution.          *
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 *  Sun Public License Notice:                                               *
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 *  The contents of this file are subject to the Sun Public License Version  *
 *  1.0 (the "License"); you may not use this file except in compliance with *
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 *  The Original Code is BeanShell. The Initial Developer of the Original    *
 *  Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright     *
 *  (C) 2000.  All Rights Reserved.                                          *
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 *                                                                           *
 *  Patrick Niemeyer (pat@pat.net)                                           *
 *  Author of Learning Java, O'Reilly & Associates                           *
 *  http://www.pat.net/~pat/                                                 *
 *                                                                           *
 *****************************************************************************/

package bsh;

class BSHTypedVariableDeclaration extends SimpleNode
{
	public Modifiers modifiers;
	
    BSHTypedVariableDeclaration(int id) { super(id); }

	private BSHType getTypeNode() {
		return ((BSHType)jjtGetChild(0));
	}

	Class evalType( CallStack callstack, Interpreter interpreter )
		throws EvalError
	{
		BSHType typeNode = getTypeNode();
		return typeNode.getType( callstack, interpreter );
	}

	BSHVariableDeclarator [] getDeclarators() 
	{
		int n = jjtGetNumChildren();
		int start=1;
		BSHVariableDeclarator [] bvda = new BSHVariableDeclarator[ n-start ];
		for (int i = start; i < n; i++)
		{
			bvda[i-start] = (BSHVariableDeclarator)jjtGetChild(i);
		}
		return bvda;
	}

	/**
		evaluate the type and one or more variable declarators, e.g.:
			int a, b=5, c;
	*/
    public Object eval( CallStack callstack, Interpreter interpreter)  
		throws EvalError
    {
		try {
			NameSpace namespace = callstack.top();
			BSHType typeNode = getTypeNode();
			Class type = typeNode.getType( callstack, interpreter );

			BSHVariableDeclarator [] bvda = getDeclarators();
			for (int i = 0; i < bvda.length; i++)
			{
				BSHVariableDeclarator dec = bvda[i];

				// Type node is passed down the chain for array initializers
				// which need it under some circumstances
				Object value = dec.eval( typeNode, callstack, interpreter);

				try {
					namespace.setTypedVariable( 
						dec.name, type, value, modifiers );
				} catch ( UtilEvalError e ) { 
					throw e.toEvalError( this, callstack ); 
				}
			}
		} catch ( EvalError e ) {
			e.reThrow( "Typed variable declaration" );
		}

        return Primitive.VOID;
    }

	public String getTypeDescriptor( 
		CallStack callstack, Interpreter interpreter, String defaultPackage ) 
	{ 
		return getTypeNode().getTypeDescriptor( 
			callstack, interpreter, defaultPackage );
	}
}