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 java.io.File; 020 021 import org.apache.camel.Expression; 022 import org.apache.camel.component.file.FileExchange; 023 024 /** 025 * File renamed using {@link Expression} to dynamically compute the file name. 026 * <p/> 027 * If most cases the {@link org.apache.camel.language.simple.FileLanguage FileLanguage} is used to 028 * create the expressions. 029 */ 030 public class FileExpressionRenamer implements FileRenamer { 031 032 private static final boolean ON_WINDOWS = System.getProperty("os.name").startsWith("Windows"); 033 034 private Expression expression; 035 036 public File renameFile(FileExchange exchange, File file) { 037 if (expression == null) { 038 throw new IllegalArgumentException("Expression is not set"); 039 } 040 File parent = file.getParentFile(); 041 042 Object result = expression.evaluate(exchange); 043 String name = exchange.getContext().getTypeConverter().convertTo(String.class, result); 044 045 if (ON_WINDOWS && (name.indexOf(":") >= 0 || name.startsWith("//"))) { 046 return new File(name); 047 } 048 return new File(parent, name); 049 } 050 051 public Expression getExpression() { 052 return expression; 053 } 054 055 public void setExpression(Expression expression) { 056 this.expression = expression; 057 } 058 }