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 }