/jEdit/tags/jedit-4-0-pre5/bsh/BSHIfStatement.java
Java | 76 lines | 36 code | 8 blank | 32 comment | 8 complexity | aa2d2b334909649fa9c9d2e6704f396a 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;
- class BSHIfStatement extends SimpleNode
- {
- BSHIfStatement(int id) { super(id); }
- public Object eval(CallStack callstack, Interpreter interpreter)
- throws EvalError
- {
- Object ret = null;
- if( evaluateCondition(
- (SimpleNode)jjtGetChild(0), callstack, interpreter ) )
- ret = ((SimpleNode)jjtGetChild(1)).eval(callstack, interpreter);
- else
- if(jjtGetNumChildren() > 2)
- ret = ((SimpleNode)jjtGetChild(2)).eval(callstack, interpreter);
- if(ret instanceof ReturnControl)
- return ret;
- else
- return Primitive.VOID;
- }
- public static boolean evaluateCondition(
- SimpleNode condExp, CallStack callstack, Interpreter interpreter)
- throws EvalError
- {
- Object obj = condExp.eval(callstack, interpreter);
- if(obj instanceof Primitive) {
- if ( obj == Primitive.VOID )
- throw new EvalError("Condition evaluates to void type", condExp );
- obj = ((Primitive)obj).getValue();
- }
- if(obj instanceof Boolean)
- return ((Boolean)obj).booleanValue();
- else
- throw new EvalError(
- "Condition must evaluate to a Boolean or boolean.", condExp );
- }
- }