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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          String normalisedPath = path.replace('\\', '/');
35          return normalisedPath;
36      }
37      
38      public static final boolean isZipStream(InputStream stream) {
39          ZipInputStream zip = new ZipInputStream(stream);
40          try {
41              zip.getNextEntry();
42              return true;
43          } catch (ZipException e) {
44              return false;
45          } catch (IOException e) {
46              return false;
47          } finally {
48              IOUtils.closeQuietly(zip);
49          }
50      }
51  
52      public static final boolean isZip(File file) {
53          try {
54              return isZipStream(new FileInputStream(file));
55          } catch (IOException e) {
56              return false;
57          }
58      }
59  
60  }