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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one   *
3    * or more contributor license agreements.  See the NOTICE file *
4    * distributed with this work for additional information        *
5    * regarding copyright ownership.  The ASF licenses this file   *
6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
8    * with the License.  You may obtain a copy of the License at   *
9    *                                                              *
10   *   http://www.apache.org/licenses/LICENSE-2.0                 *
11   *                                                              *
12   * Unless required by applicable law or agreed to in writing,   *
13   * software distributed under the License is distributed on an  *
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15   * KIND, either express or implied.  See the License for the    *
16   * specific language governing permissions and limitations      *
17   * under the License.                                           *
18   */ 
19  package org.apache.rat.document.impl;
20  
21  import java.io.File;
22  import java.io.FileInputStream;
23  import java.io.IOException;
24  import java.io.InputStream;
25  import java.util.zip.ZipException;
26  import java.util.zip.ZipInputStream;
27  
28  import org.apache.commons.io.IOUtils;
29  
30  public class DocumentImplUtils {
31  
32      public final static String toName(File file) {
33          String path = file.getPath();
34          return path.replace('\\', '/');
35      }
36      
37      public static final boolean isZipStream(InputStream stream) {
38          ZipInputStream zip = new ZipInputStream(stream);
39          try {
40              zip.getNextEntry();
41              return true;
42          } catch (ZipException e) {
43              return false;
44          } catch (IOException e) {
45              return false;
46          } finally {
47              IOUtils.closeQuietly(zip);
48          }
49      }
50  
51      public static final boolean isZip(File file) {
52          try {
53              return isZipStream(new FileInputStream(file));
54          } catch (IOException e) {
55              return false;
56          }
57      }
58  
59  }