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 }