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.util.Map;
020    
021    import org.apache.camel.Expression;
022    import org.apache.camel.component.file.FileProcessStrategy;
023    
024    /**
025     * Factory to provide the {@link org.apache.camel.component.file.FileProcessStrategy} to use.
026     */
027    public final class FileProcessStrategyFactory {
028    
029        private FileProcessStrategyFactory() {
030            // Factory class
031        }
032    
033        /**
034         * A strategy method to lazily create the file strategy to use.
035         */
036        public static FileProcessStrategy createFileProcessStrategy(Map<String, Object> params) {
037    
038            // We assume a value is present only if its value not null for String and 'true' for boolean
039            boolean isDelete = params.get("delete") != null;
040            boolean isLock = params.get("lock") != null;
041            String moveNamePrefix = (String) params.get("moveNamePrefix");
042            String moveNamePostfix = (String) params.get("moveNamePostfix");
043            Expression expression = (Expression) params.get("expression");
044    
045            if (params.containsKey("noop")) {
046                return new NoOpFileProcessStrategy(isLock);
047            } else if (moveNamePostfix != null || moveNamePrefix != null) {
048                if (isDelete) {
049                    throw new IllegalArgumentException("You cannot set the deleteFiles property "
050                        + "and a moveFilenamePostfix or moveFilenamePrefix");
051                }
052                return new RenameFileProcessStrategy(isLock, moveNamePrefix, moveNamePostfix);
053            } else if (expression != null) {
054                FileExpressionRenamer renamer = new FileExpressionRenamer();
055                renamer.setExpression(expression);
056    
057                RenameFileProcessStrategy strategy = new RenameFileProcessStrategy(isLock);
058                strategy.setRenamer(renamer);
059                return strategy;
060            } else if (isDelete) {
061                return new DeleteFileProcessStrategy(isLock);
062            } else {
063                return new RenameFileProcessStrategy(isLock);
064            }
065        }
066    }