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 **/ 019 package lucee.runtime.type; 020 021import lucee.runtime.exp.ExpressionException; 022import lucee.runtime.exp.PageException; 023import lucee.runtime.exp.PageRuntimeException; 024 025/** 026 * a read only Struct if flag is set to readonly 027 */ 028public class ReadOnlyStruct extends StructImpl { 029 030 031 private boolean isReadOnly=false; 032 033 /** 034 * sets if scope is readonly or not 035 * @param isReadOnly 036 */ 037 public void setReadOnly(boolean isReadOnly) { 038 this.isReadOnly=isReadOnly; 039 } 040 041 @Override 042 public Object remove(Collection.Key key) throws PageException { 043 if(isReadOnly)throw new ExpressionException("can't remove key ["+key.getString()+"] from struct, struct is readonly"); 044 return super.remove (key); 045 } 046 047 @Override 048 public Object removeEL(Collection.Key key) { 049 if(isReadOnly)return null; 050 return super.removeEL (key); 051 } 052 053 public void removeAll() { 054 if(!isReadOnly)super.clear(); 055 } 056 057 @Override 058 public Object set(Collection.Key key, Object value) throws PageException { 059 if(isReadOnly)throw new ExpressionException("can't set key ["+key.getString()+"] to struct, struct is readonly"); 060 return super.set (key,value); 061 } 062 063 @Override 064 public Object setEL(Collection.Key key, Object value) { 065 if(!isReadOnly)super.setEL (key,value); 066 return value; 067 } 068 069 070 @Override 071 public Collection duplicate(boolean deepCopy) { 072 ReadOnlyStruct trg=new ReadOnlyStruct(); 073 trg.isReadOnly=isReadOnly; 074 copy(this, trg, deepCopy); 075 return trg; 076 } 077 078 079 @Override 080 public void clear() { 081 if(isReadOnly)throw new PageRuntimeException(new ExpressionException("can't clear struct, struct is readonly")); 082 super.clear(); 083 } 084}