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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.tika.parser;
18  
19  import java.io.IOException;
20  import java.io.InputStream;
21  import java.util.Collections;
22  import java.util.Set;
23  
24  import org.apache.tika.exception.TikaException;
25  import org.apache.tika.metadata.Metadata;
26  import org.apache.tika.mime.MediaType;
27  import org.xml.sax.ContentHandler;
28  import org.xml.sax.SAXException;
29  
30  /**
31   * Dummy parser that always throws a {@link TikaException} without even
32   * attempting to parse the given document stream. Useful as a sentinel parser
33   * for unknown document types.
34   */
35  public class ErrorParser implements Parser {
36  
37      /**
38       * Singleton instance of this class.
39       */
40      public static final ErrorParser INSTANCE = new ErrorParser();
41  
42      public Set<MediaType> getSupportedTypes(ParseContext context) {
43          return Collections.emptySet();
44      }
45  
46      public void parse(
47              InputStream stream, ContentHandler handler,
48              Metadata metadata, ParseContext context)
49              throws TikaException {
50          throw new TikaException("Parse error");
51      }
52  
53      /**
54       * @deprecated This method will be removed in Apache Tika 1.0.
55       */
56      public void parse(
57              InputStream stream, ContentHandler handler, Metadata metadata)
58              throws IOException, SAXException, TikaException {
59          parse(stream, handler, metadata, new ParseContext());
60      }
61  
62  }