001/** 002 * 003 * Copyright 2017 Florian Schmaus, 2018 Paul Schaub. 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * 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 */ 017package org.jivesoftware.smackx.ox.util; 018 019import java.io.File; 020import java.io.FileInputStream; 021import java.io.FileNotFoundException; 022import java.io.FileOutputStream; 023import java.io.IOException; 024 025public class FileUtils { 026 027 public static FileOutputStream prepareFileOutputStream(File file) throws IOException { 028 if (!file.exists()) { 029 030 // Create parent directory 031 File parent = file.getParentFile(); 032 if (!parent.exists() && !parent.mkdirs()) { 033 throw new IOException("Cannot create directory " + parent.getAbsolutePath()); 034 } 035 036 // Create file 037 if (!file.createNewFile()) { 038 throw new IOException("Cannot create file " + file.getAbsolutePath()); 039 } 040 } 041 042 if (file.isDirectory()) { 043 throw new AssertionError("File " + file.getAbsolutePath() + " is not a file!"); 044 } 045 046 return new FileOutputStream(file); 047 } 048 049 public static FileInputStream prepareFileInputStream(File file) throws IOException { 050 if (file.exists()) { 051 if (file.isFile()) { 052 return new FileInputStream(file); 053 } else { 054 throw new IOException("File " + file.getAbsolutePath() + " is not a file!"); 055 } 056 } else { 057 throw new FileNotFoundException("File " + file.getAbsolutePath() + " not found."); 058 } 059 } 060}