/jEdit/tags/jedit-4-2-pre14/bsh/BSHCastExpression.java
Java | 70 lines | 19 code | 8 blank | 43 comment | 0 complexity | b559bf3f9e589cfc2313b7c525822430 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*****************************************************************************
- * *
- * 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: *
- * *
- * 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 *
- * the License. A copy of the License is available at http://www.sun.com *
- * *
- * 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. *
- * *
- * GNU Public License Notice: *
- * *
- * Alternatively, the contents of this file may be used under the terms of *
- * the GNU Lesser General Public License (the "LGPL"), in which case the *
- * provisions of LGPL are applicable instead of those above. If you wish to *
- * allow use of your version of this file only under the terms of the LGPL *
- * and not to allow others to use your version of this file under the SPL, *
- * indicate your decision by deleting the provisions above and replace *
- * them with the notice and other provisions required by the LGPL. If you *
- * do not delete the provisions above, a recipient may use your version of *
- * this file under either the SPL or the LGPL. *
- * *
- * Patrick Niemeyer (pat@pat.net) *
- * Author of Learning Java, O'Reilly & Associates *
- * http://www.pat.net/~pat/ *
- * *
- *****************************************************************************/
- package bsh;
- /**
- Implement casts.
- I think it should be possible to simplify some of the code here by
- using the Types.getAssignableForm() method, but I haven't looked
- into it.
- */
- class BSHCastExpression extends SimpleNode {
- public BSHCastExpression(int id) { super(id); }
- /**
- @return the result of the cast.
- */
- public Object eval(
- CallStack callstack, Interpreter interpreter ) throws EvalError
- {
- NameSpace namespace = callstack.top();
- Class toType = ((BSHType)jjtGetChild(0)).getType(
- callstack, interpreter );
- SimpleNode expression = (SimpleNode)jjtGetChild(1);
- // evaluate the expression
- Object fromValue = expression.eval(callstack, interpreter);
- Class fromType = fromValue.getClass();
- try {
- return Types.castObject( fromValue, toType, Types.CAST );
- } catch ( UtilEvalError e ) {
- throw e.toEvalError( this, callstack );
- }
- }
- }