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 }