1 /* $Id: BookFactory.java 1102425 2011-05-12 19:03:34Z simonetripodi $
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one or more
4 * contributor license agreements. See the NOTICE file distributed with
5 * this work for additional information regarding copyright ownership.
6 * The ASF licenses this file to You under the Apache License, Version 2.0
7 * (the "License"); you may not use this file except in compliance with
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.commons.digester3.annotations.catalog;
19
20 import org.apache.commons.digester3.AbstractObjectCreationFactory;
21 import org.xml.sax.Attributes;
22
23 /**
24 * @since 2.1
25 */
26 public final class BookFactory
27 extends AbstractObjectCreationFactory<Book>
28 {
29
30 private final static String ISBN = "isbn";
31
32 @Override
33 public Book createObject( Attributes attributes )
34 throws Exception
35 {
36 String isbn = attributes.getValue( ISBN );
37
38 if ( isbn == null )
39 {
40 throw new Exception( "Mandatory isbn attribute not present on book tag." );
41 }
42
43 return new Book( isbn );
44 }
45
46 }