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
18 package org.apache.log4j.xml;
19
20 import org.xml.sax.EntityResolver;
21 import org.xml.sax.InputSource;
22
23 import java.io.ByteArrayInputStream;
24
25
26 /**
27 * An {@link EntityResolver} specifically designed to return
28 * an empty InputSource for logger.dtd.
29 */
30 public final class UtilLoggingEntityResolver implements EntityResolver {
31
32 /**
33 * Create new instance.
34 */
35 public UtilLoggingEntityResolver() {
36 super();
37 }
38
39
40 /**
41 * {@inheritDoc}
42 */
43 public InputSource resolveEntity(final String publicId,
44 final String systemId) {
45 if (systemId.endsWith("logger.dtd")) {
46 return new InputSource(new ByteArrayInputStream(new byte[0]));
47 } else {
48 return null;
49 }
50 }
51 }