content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.component.dataset;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.util.LinkedList;
  import java.util.List;
  
  import org.apache.camel.util.IOHelper;
  import org.apache.camel.util.Scanner;
  
  /**
   * A DataSet that reads payloads from a file that are used to create each message exchange along with using a pluggable
   * transformer to customize the messages. The file contents may optionally be split using a supplied token.
   */
  public class FileDataSet extends ListDataSet {
      private File sourceFile;
      private String delimiter;
  
      public FileDataSet(String sourceFileName) throws IOException {
          this(new File(sourceFileName));
      }
  
      public FileDataSet(File sourceFile) throws IOException {
          this(sourceFile, null);
      }
  
      public FileDataSet(String sourceFileName, String delimiter) throws IOException {
          this(new File(sourceFileName), delimiter);
      }
  
      public FileDataSet(File sourceFile, String delimiter) throws IOException {
          setSourceFile(sourceFile, delimiter);
      }
  
      // Properties
      //-------------------------------------------------------------------------
  
      public File getSourceFile() {
          return sourceFile;
      }
  
      public void setSourceFile(File sourceFile) throws IOException {
          this.sourceFile = sourceFile;
          readSourceFile();
      }
  
      public void setSourceFile(File sourceFile, String delimiter) throws IOException {
          this.sourceFile = sourceFile;
          this.delimiter = delimiter;
          readSourceFile();
      }
  
      public String getDelimiter() {
          return delimiter;
      }
  
      // Implementation methods
      //-------------------------------------------------------------------------
  
      private void readSourceFile() throws IOException {
          List<Object> bodies = new LinkedList<>();
          if (delimiter != null) {
              try (Scanner scanner = new Scanner(sourceFile, null, delimiter)) {
                  while (scanner.hasNext()) {
                      String nextPayload = scanner.next();
                      if (nextPayload != null && nextPayload.length() > 0) {
                          bodies.add(nextPayload);
                      }
                  }
              }
          } else {
              Object data = IOHelper.loadText(new FileInputStream(sourceFile));
              bodies.add(data);
          }
  
          setDefaultBodies(bodies);
      }
  }
  