001/*
002 * Copyright 2012-2013 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.springframework.batch.core.configuration.annotation;
017
018import org.springframework.context.annotation.ImportSelector;
019import org.springframework.core.annotation.AnnotationAttributes;
020import org.springframework.core.type.AnnotationMetadata;
021import org.springframework.util.Assert;
022
023/**
024 * Base {@code Configuration} class providing common structure for enabling and using Spring Batch. Customization is
025 * available by implementing the {@link BatchConfigurer} interface.
026 * 
027 * @author Dave Syer
028 * @since 2.2
029 * @see EnableBatchProcessing
030 */
031public class BatchConfigurationSelector implements ImportSelector {
032
033        @Override
034        public String[] selectImports(AnnotationMetadata importingClassMetadata) {
035                Class<?> annotationType = EnableBatchProcessing.class;
036                AnnotationAttributes attributes = AnnotationAttributes.fromMap(importingClassMetadata.getAnnotationAttributes(
037                                annotationType.getName(), false));
038                Assert.notNull(attributes, String.format("@%s is not present on importing class '%s' as expected",
039                                annotationType.getSimpleName(), importingClassMetadata.getClassName()));
040
041                String[] imports;
042                if (attributes.containsKey("modular") && attributes.getBoolean("modular")) {
043                        imports = new String[] { ModularBatchConfiguration.class.getName() };
044                }
045                else {
046                        imports = new String[] { SimpleBatchConfiguration.class.getName() };
047                }
048
049                return imports;
050        }
051
052}