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/jEdit/tags/jedit-4-3-pre5/bsh/BSHTypedVariableDeclaration.java

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Java | 106 lines | 56 code | 12 blank | 38 comment | 2 complexity | 3b57d0cc829feb109f5088f33becc1b5 MD5 | raw file
  1/*****************************************************************************
  2 *                                                                           *
  3 *  This file is part of the BeanShell Java Scripting distribution.          *
  4 *  Documentation and updates may be found at http://www.beanshell.org/      *
  5 *                                                                           *
  6 *  Sun Public License Notice:                                               *
  7 *                                                                           *
  8 *  The contents of this file are subject to the Sun Public License Version  *
  9 *  1.0 (the "License"); you may not use this file except in compliance with *
 10 *  the License. A copy of the License is available at http://www.sun.com    * 
 11 *                                                                           *
 12 *  The Original Code is BeanShell. The Initial Developer of the Original    *
 13 *  Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright     *
 14 *  (C) 2000.  All Rights Reserved.                                          *
 15 *                                                                           *
 16 *  GNU Public License Notice:                                               *
 17 *                                                                           *
 18 *  Alternatively, the contents of this file may be used under the terms of  *
 19 *  the GNU Lesser General Public License (the "LGPL"), in which case the    *
 20 *  provisions of LGPL are applicable instead of those above. If you wish to *
 21 *  allow use of your version of this file only under the  terms of the LGPL *
 22 *  and not to allow others to use your version of this file under the SPL,  *
 23 *  indicate your decision by deleting the provisions above and replace      *
 24 *  them with the notice and other provisions required by the LGPL.  If you  *
 25 *  do not delete the provisions above, a recipient may use your version of  *
 26 *  this file under either the SPL or the LGPL.                              *
 27 *                                                                           *
 28 *  Patrick Niemeyer (pat@pat.net)                                           *
 29 *  Author of Learning Java, O'Reilly & Associates                           *
 30 *  http://www.pat.net/~pat/                                                 *
 31 *                                                                           *
 32 *****************************************************************************/
 33
 34package bsh;
 35
 36class BSHTypedVariableDeclaration extends SimpleNode
 37{
 38	public Modifiers modifiers;
 39	
 40    BSHTypedVariableDeclaration(int id) { super(id); }
 41
 42	private BSHType getTypeNode() {
 43		return ((BSHType)jjtGetChild(0));
 44	}
 45
 46	Class evalType( CallStack callstack, Interpreter interpreter )
 47		throws EvalError
 48	{
 49		BSHType typeNode = getTypeNode();
 50		return typeNode.getType( callstack, interpreter );
 51	}
 52
 53	BSHVariableDeclarator [] getDeclarators() 
 54	{
 55		int n = jjtGetNumChildren();
 56		int start=1;
 57		BSHVariableDeclarator [] bvda = new BSHVariableDeclarator[ n-start ];
 58		for (int i = start; i < n; i++)
 59		{
 60			bvda[i-start] = (BSHVariableDeclarator)jjtGetChild(i);
 61		}
 62		return bvda;
 63	}
 64
 65	/**
 66		evaluate the type and one or more variable declarators, e.g.:
 67			int a, b=5, c;
 68	*/
 69    public Object eval( CallStack callstack, Interpreter interpreter)  
 70		throws EvalError
 71    {
 72		try {
 73			NameSpace namespace = callstack.top();
 74			BSHType typeNode = getTypeNode();
 75			Class type = typeNode.getType( callstack, interpreter );
 76
 77			BSHVariableDeclarator [] bvda = getDeclarators();
 78			for (int i = 0; i < bvda.length; i++)
 79			{
 80				BSHVariableDeclarator dec = bvda[i];
 81
 82				// Type node is passed down the chain for array initializers
 83				// which need it under some circumstances
 84				Object value = dec.eval( typeNode, callstack, interpreter);
 85
 86				try {
 87					namespace.setTypedVariable( 
 88						dec.name, type, value, modifiers );
 89				} catch ( UtilEvalError e ) { 
 90					throw e.toEvalError( this, callstack ); 
 91				}
 92			}
 93		} catch ( EvalError e ) {
 94			e.reThrow( "Typed variable declaration" );
 95		}
 96
 97        return Primitive.VOID;
 98    }
 99
100	public String getTypeDescriptor( 
101		CallStack callstack, Interpreter interpreter, String defaultPackage ) 
102	{ 
103		return getTypeNode().getTypeDescriptor( 
104			callstack, interpreter, defaultPackage );
105	}
106}