Process all meta and local @Import declarations

Includes the introduction of AnnotationUtils#findAllAnnotationAttributes
to support iterating through all annotations declared on a given type
and interrogating each for the presence of a meta-annotation. See tests
for details.

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/ImportAnnotationDetectionTests.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright 2002-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.context.annotation.configuration;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.junit.Test;
+import org.springframework.beans.TestBean;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+/**
+ * Tests that @Import may be used both as a locally declared and meta-declared
+ * annotation, that all declarations are processed, and that any local declaration
+ * is processed last.
+ *
+ * @author Chris Beams
+ * @since 3.1
+ */
+public class ImportAnnotationDetectionTests {
+
+	@Test
+	public void multipleMetaImportsAreProcessed() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(MultiMetaImportConfig.class);
+		ctx.refresh();
+		assertThat(ctx.containsBean("testBean1"), is(true));
+		assertThat(ctx.containsBean("testBean2"), is(true));
+	}
+
+	@Test
+	public void localAndMetaImportsAreProcessed() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(MultiMetaImportConfigWithLocalImport.class);
+		ctx.refresh();
+		assertThat(ctx.containsBean("testBean1"), is(true));
+		assertThat(ctx.containsBean("testBean2"), is(true));
+		assertThat(ctx.containsBean("testBean3"), is(true));
+	}
+
+	@Test
+	public void localImportIsProcessedLast() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(MultiMetaImportConfigWithLocalImportWithBeanOverride.class);
+		ctx.refresh();
+		assertThat(ctx.containsBean("testBean1"), is(true));
+		assertThat(ctx.containsBean("testBean2"), is(true));
+		assertThat(ctx.getBean("testBean2", TestBean.class).getName(), is("2a"));
+	}
+
+	@Configuration
+	@MetaImport1
+	@MetaImport2
+	static class MultiMetaImportConfig {
+	}
+
+	@Configuration
+	@MetaImport1
+	@MetaImport2
+	@Import(Config3.class)
+	static class MultiMetaImportConfigWithLocalImport {
+	}
+
+	@Configuration
+	@MetaImport1
+	@MetaImport2
+	@Import(Config2a.class)
+	static class MultiMetaImportConfigWithLocalImportWithBeanOverride {
+	}
+
+
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Import(Config1.class)
+	@interface MetaImport1 {
+	}
+
+
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Import(Config2.class)
+	@interface MetaImport2 {
+	}
+
+
+	@Configuration
+	static class Config1 {
+		@Bean
+		TestBean testBean1() {
+			return new TestBean("1");
+		}
+	}
+
+	@Configuration
+	static class Config2 {
+		@Bean
+		TestBean testBean2() {
+			return new TestBean("2");
+		}
+	}
+
+	@Configuration
+	static class Config2a {
+		@Bean
+		TestBean testBean2() {
+			return new TestBean("2a");
+		}
+	}
+
+	@Configuration
+	static class Config3 {
+		@Bean
+		TestBean testBean3() {
+			return new TestBean("3");
+		}
+	}
+}