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 import org.apache.camel.StreamCache; 027 028 public class FileInputStreamCache extends InputStream implements StreamCache { 029 private FileInputStream inputStream; 030 private CachedOutputStream cachedOutputStream; 031 private File file; 032 033 public FileInputStreamCache(File file, CachedOutputStream cos) throws FileNotFoundException { 034 this.file = file; 035 cachedOutputStream = cos; 036 inputStream = new FileInputStream(file); 037 } 038 039 public void close() { 040 try { 041 inputStream.close(); 042 cachedOutputStream.close(); 043 } catch (Exception exception) { 044 throw new RuntimeCamelException(exception); 045 } 046 } 047 048 public void reset() { 049 try { 050 inputStream.close(); 051 inputStream = new FileInputStream(file); 052 } catch (Exception exception) { 053 throw new RuntimeCamelException(exception); 054 } 055 } 056 057 public int available() throws IOException { 058 return inputStream.available(); 059 } 060 061 @Override 062 public int read() throws IOException { 063 return inputStream.read(); 064 } 065 066 }