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.converter.stream;
018
019 import java.io.File;
020 import java.io.FileInputStream;
021 import java.io.FileNotFoundException;
022 import java.io.IOException;
023 import java.io.InputStream;
024
025 import org.apache.camel.RuntimeCamelException;
026
027 public class FileInputStreamCache extends InputStream implements StreamCache {
028 private FileInputStream inputStream;
029 private CachedOutputStream cachedOutputStream;
030 private File file;
031
032 public FileInputStreamCache(File file, CachedOutputStream cos) throws FileNotFoundException {
033 this.file = file;
034 cachedOutputStream = cos;
035 inputStream = new FileInputStream(file);
036 }
037
038 public void close() {
039 try {
040 inputStream.close();
041 cachedOutputStream.close();
042 } catch (Exception exception) {
043 throw new RuntimeCamelException(exception);
044 }
045 }
046
047 public void reset() {
048 try {
049 inputStream.close();
050 inputStream = new FileInputStream(file);
051 } catch (Exception exception) {
052 throw new RuntimeCamelException(exception);
053 }
054 }
055
056 public int available() throws IOException {
057 return inputStream.available();
058 }
059
060 @Override
061 public int read() throws IOException {
062 return inputStream.read();
063 }
064
065 }