001/* $Id: BookFactory.java 1102425 2011-05-12 19:03:34Z simonetripodi $ 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.commons.digester3.annotations.catalog; 019 020import org.apache.commons.digester3.AbstractObjectCreationFactory; 021import org.xml.sax.Attributes; 022 023/** 024 * @since 2.1 025 */ 026public final class BookFactory 027 extends AbstractObjectCreationFactory<Book> 028{ 029 030 private final static String ISBN = "isbn"; 031 032 @Override 033 public Book createObject( Attributes attributes ) 034 throws Exception 035 { 036 String isbn = attributes.getValue( ISBN ); 037 038 if ( isbn == null ) 039 { 040 throw new Exception( "Mandatory isbn attribute not present on book tag." ); 041 } 042 043 return new Book( isbn ); 044 } 045 046}