001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.runtime.interpreter.ref.op; 020 021import lucee.runtime.PageContext; 022import lucee.runtime.exp.PageException; 023import lucee.runtime.interpreter.ref.Ref; 024import lucee.runtime.interpreter.ref.RefSupport; 025import lucee.runtime.interpreter.ref.literal.LFunctionValue; 026import lucee.runtime.interpreter.ref.var.Variable; 027 028public class Elvis extends RefSupport implements Ref{ 029 030 private Ref left; 031 private Ref right; 032 033 public Elvis(Ref left, Ref right) { 034 this.left=left; 035 this.right=right; 036 } 037 038 039 @Override 040 public Object getValue(PageContext pc) throws PageException { 041 if(left instanceof Variable) { 042 Variable var = (Variable)left; 043 String[] arr = LFunctionValue.toStringArray(pc, var); 044 return lucee.runtime.op.Elvis.operate(pc, arr)?left.getValue(pc):right.getValue(pc); 045 } 046 047 Object val = left.getValue(pc); 048 if(val!=null) return val; 049 return right.getValue(pc); 050 051 } 052 053 @Override 054 public String getTypeName() { 055 return "operation"; 056 } 057}