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.commons.io.res.util;
020
021import java.io.File;
022
023import lucee.commons.io.res.Resource;
024import lucee.commons.lang.StringUtil;
025import lucee.runtime.engine.ThreadLocalPageContext;
026import lucee.runtime.exp.ExpressionException;
027import lucee.runtime.exp.PageException;
028import lucee.runtime.exp.PageRuntimeException;
029import lucee.runtime.op.Caster;
030import lucee.runtime.type.UDF;
031
032public class UDFFilter extends UDFFilterSupport implements ResourceAndResourceNameFilter {
033
034        public UDFFilter(UDF udf) throws ExpressionException{
035                super(udf);
036        }
037        
038    public boolean accept(String path) {
039        args[0]=path;
040        try {
041                        return Caster.toBooleanValue(udf.call(ThreadLocalPageContext.get(), args, true));
042                        
043                } 
044        catch (PageException e) {
045                        throw new PageRuntimeException(e);
046                }
047    }
048    
049    
050    public boolean accept(Resource file) {
051        return accept(file.getAbsolutePath());
052    }
053
054        @Override
055        public boolean accept(Resource parent, String name) {
056                String path=parent.getAbsolutePath();
057                if(path.endsWith(File.separator)) path+=name;
058                else path+=File.separator+name;
059                return accept(path);
060        }
061        
062    @Override
063        public String toString() {
064                return "UDFFilter:"+udf;
065        }
066        
067        public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(Object filter) throws PageException     {
068           if(filter instanceof UDF)
069                   return createResourceAndResourceNameFilter((UDF)filter);
070           return createResourceAndResourceNameFilter(Caster.toString(filter));
071        }
072
073        
074        public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(UDF filter) throws PageException        {
075                return new UDFFilter(filter);
076        }
077
078        public static ResourceAndResourceNameFilter createResourceAndResourceNameFilter(String pattern) {
079
080                if( !StringUtil.isEmpty(pattern, true) )
081                return new WildcardPatternFilter( pattern, "|" );
082
083            return null;
084        }
085}