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.functions.arrays; 020 021import lucee.runtime.PageContext; 022import lucee.runtime.exp.ExpressionException; 023import lucee.runtime.exp.FunctionException; 024import lucee.runtime.exp.PageException; 025import lucee.runtime.functions.BIF; 026import lucee.runtime.op.Caster; 027import lucee.runtime.type.Array; 028import lucee.runtime.type.ArrayImpl; 029 030public final class ArrayMid extends BIF { 031 032 private static final long serialVersionUID = 4996354700884413289L; 033 034 public static Array call(PageContext pc , Array arr, double start) throws ExpressionException { 035 return call(pc,arr,start,-1); 036 } 037 038 public static Array call(PageContext pc , Array arr, double start, double count) throws ExpressionException { 039 int s=(int) start; 040 int c=(int) count; 041 042 if(s<1) throw new FunctionException(pc, "ArrayMid", 2, "start", "Parameter which is now ["+s+"] must be a positive integer"); 043 if(c==-1) c=arr.size(); 044 else if(c<-1) throw new FunctionException(pc, "ArrayMid", 3, "count", "Parameter which is now ["+c+"] must be a non-negative integer or -1 (for string length)"); 045 c+=s-1; 046 if(s>arr.size()) return new ArrayImpl(); 047 048 ArrayImpl rtn = new ArrayImpl(); 049 int len = arr.size(); 050 Object value; 051 for(int i=s;i<=c && i<=len ;i++){ 052 value=arr.get(i, null); 053 rtn.appendEL(value); 054 } 055 return rtn; 056 } 057 058 @Override 059 public Object invoke(PageContext pc, Object[] args) throws PageException { 060 if(args.length==2)return call(pc,Caster.toArray(args[0]),Caster.toDoubleValue(args[1])); 061 return call(pc,Caster.toArray(args[0]),Caster.toDoubleValue(args[1]),Caster.toDoubleValue(args[2])); 062 } 063}