001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.component.file.strategy;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.Expression;
021    import org.apache.camel.component.file.GenericFile;
022    import org.apache.camel.util.ObjectHelper;
023    
024    public class GenericFileExpressionRenamer<T> implements GenericFileRenamer<T> {
025        private Expression expression;
026    
027        public GenericFileExpressionRenamer() {
028        }
029    
030        public GenericFileExpressionRenamer(Expression expression) {
031            this.expression = expression;
032        }
033    
034        public GenericFile<T> renameFile(Exchange exchange, GenericFile<T> file) {
035            ObjectHelper.notNull(expression, "expression");
036    
037            String newName = expression.evaluate(exchange, String.class);
038    
039            // make a copy as result and change its file name
040            GenericFile<T> result = file.copyFrom(file);
041            result.changeFileName(newName);
042            return result;
043        }
044    
045        public Expression getExpression() {
046            return expression;
047        }
048    
049        public void setExpression(Expression expression) {
050            this.expression = expression;
051        }    
052    }