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 */
017package org.apache.camel.component.file.strategy;
018
019import org.apache.camel.Exchange;
020import org.apache.camel.Expression;
021import org.apache.camel.component.file.GenericFile;
022import org.apache.camel.util.ObjectHelper;
023
024public 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}