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/*****************************************************************************
 *                                                                           *
 *  This file is part of the BeanShell Java Scripting distribution.          *
 *  Documentation and updates may be found at http://www.beanshell.org/      *
 *                                                                           *
 *  Sun Public License Notice:                                               *
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 *  Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright     *
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 *                                                                           *
 *  Patrick Niemeyer ([email protected])                                           *
 *  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);
        }
}