| /* ==================================================================== |
| 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.poi.util; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Random; |
| |
| /** |
| * Interface for creating temporary files. Collects them all into one directory. |
| * |
| * @author Glen Stampoultzis |
| */ |
| public class TempFile |
| { |
| static File dir; |
| static Random rnd = new Random(); |
| |
| /** |
| * Creates a temporary file. Files are collected into one directory and by default are |
| * deleted on exit from the VM. Files can be kept by defining the system property |
| * <code>poi.keep.tmp.files</code>. |
| * <p> |
| * Dont forget to close all files or it might not be possible to delete them. |
| */ |
| public static File createTempFile(String prefix, String suffix) throws IOException |
| { |
| if (dir == null) |
| { |
| dir = new File(System.getProperty("java.io.tmpdir"), "poifiles"); |
| dir.mkdir(); |
| if (System.getProperty("poi.keep.tmp.files") == null) |
| dir.deleteOnExit(); |
| } |
| |
| File newFile = new File(dir, prefix + rnd.nextInt() + suffix); |
| if (System.getProperty("poi.keep.tmp.files") == null) |
| newFile.deleteOnExit(); |
| return newFile; |
| } |
| |
| |
| |
| } |