introduced dedicated Jsr330ScopeMetadataResolver

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2422 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.context/src/main/java/org/springframework/context/annotation/Jsr330ScopeMetadataResolver.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright 2002-2009 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;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
+import org.springframework.beans.factory.config.BeanDefinition;
+
+/**
+ * Simple {@link ScopeMetadataResolver} implementation that follows JSR-330 scoping rules:
+ * defaulting to prototype scope unless {@link javax.inject.Singleton} is present.
+ *
+ * <p>This scope resolver can be used with {@link ClassPathBeanDefinitionScanner} and
+ * {@link AnnotatedBeanDefinitionReader} for standard JSR-330 compliance. However,
+ * in practice, you will typically use Spring's rich default scoping instead - or extend
+ * this resolver with custom scoping annotations that point to extended Spring scopes.
+ *
+ * @author Juergen Hoeller
+ * @since 3.0
+ * @see #registerScope
+ * @see #resolveScopeName
+ * @see ClassPathBeanDefinitionScanner#setScopeMetadataResolver
+ * @see AnnotatedBeanDefinitionReader#setScopeMetadataResolver
+ */
+public class Jsr330ScopeMetadataResolver implements ScopeMetadataResolver {
+
+	private final Map<String, String> scopeMap = new HashMap<String, String>();
+
+
+	public Jsr330ScopeMetadataResolver() {
+		registerScope("javax.inject.Singleton", BeanDefinition.SCOPE_SINGLETON);
+	}
+
+
+	/**
+	 * Register an extended JSR-330 scope annotation, mapping it onto a
+	 * specific Spring scope by name.
+	 * @param annotationType the JSR-330 annotation type as a Class
+	 * @param scopeName the Spring scope name
+	 */
+	public final void registerScope(Class annotationType, String scopeName) {
+		this.scopeMap.put(annotationType.getName(), scopeName);
+	}
+
+	/**
+	 * Register an extended JSR-330 scope annotation, mapping it onto a
+	 * specific Spring scope by name.
+	 * @param annotationType the JSR-330 annotation type by name
+	 * @param scopeName the Spring scope name
+	 */
+	public final void registerScope(String annotationType, String scopeName) {
+		this.scopeMap.put(annotationType, scopeName);
+	}
+
+	/**
+	 * Resolve the given annotation type into a named Spring scope.
+	 * <p>The default implementation simply checks against registered scopes.
+	 * Can be overridden for custom mapping rules, e.g. naming conventions.
+	 * @param annotationType the JSR-330 annotation type
+	 * @return the Spring scope name
+	 */
+	protected String resolveScopeName(String annotationType) {
+		return this.scopeMap.get(annotationType);
+	}
+
+
+	public ScopeMetadata resolveScopeMetadata(BeanDefinition definition) {
+		ScopeMetadata metadata = new ScopeMetadata();
+		metadata.setScopeName(BeanDefinition.SCOPE_PROTOTYPE);
+		if (definition instanceof AnnotatedBeanDefinition) {
+			AnnotatedBeanDefinition annDef = (AnnotatedBeanDefinition) definition;
+			Set<String> annTypes = annDef.getMetadata().getAnnotationTypes();
+			String found = null;
+			for (String annType : annTypes) {
+				Set<String> metaAnns = annDef.getMetadata().getMetaAnnotationTypes(annType);
+				if (metaAnns.contains("javax.inject.Scope")) {
+					if (found != null) {
+						throw new IllegalStateException("Found ambiguous scope annotations on bean class [" +
+								definition.getBeanClassName() + "]: " + found + ", " + annType);
+					}
+					found = annType;
+					String scopeName = resolveScopeName(annType);
+					if (scopeName == null) {
+						throw new IllegalStateException(
+								"Unsupported scope annotation - not mapped onto Spring scope name: " + annType);
+					}
+					metadata.setScopeName(scopeName);
+				}
+			}
+		}
+		return metadata;
+	}
+
+}

org.springframework.context/src/test/java/org/springframework/context/annotation/jsr330/SpringAtInjectTck.java

@@ -29,12 +29,9 @@ import org.atinject.tck.auto.V8Engine;
 import org.atinject.tck.auto.accessories.Cupholder;
 import org.atinject.tck.auto.accessories.SpareTire;
 
-import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
-import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.context.annotation.AnnotatedBeanDefinitionReader;
+import org.springframework.context.annotation.Jsr330ScopeMetadataResolver;
 import org.springframework.context.annotation.Primary;
-import org.springframework.context.annotation.ScopeMetadata;
-import org.springframework.context.annotation.ScopeMetadataResolver;
 import org.springframework.context.support.GenericApplicationContext;
 
 /**
@@ -46,17 +43,7 @@ public class SpringAtInjectTck {
 	public static Test suite() {
 		GenericApplicationContext ac = new GenericApplicationContext();
 		AnnotatedBeanDefinitionReader bdr = new AnnotatedBeanDefinitionReader(ac);
-		bdr.setScopeMetadataResolver(new ScopeMetadataResolver() {
-			public ScopeMetadata resolveScopeMetadata(BeanDefinition definition) {
-				ScopeMetadata metadata = new ScopeMetadata();
-				if (definition instanceof AnnotatedBeanDefinition) {
-					AnnotatedBeanDefinition annDef = (AnnotatedBeanDefinition) definition;
-					metadata.setScopeName(annDef.getMetadata().hasAnnotation(javax.inject.Singleton.class.getName()) ?
-							BeanDefinition.SCOPE_SINGLETON : BeanDefinition.SCOPE_PROTOTYPE);
-				}
-				return metadata;
-			}
-		});
+		bdr.setScopeMetadataResolver(new Jsr330ScopeMetadataResolver());
 
 		bdr.registerBean(Convertible.class);
 		bdr.registerBean(DriversSeat.class, Drivers.class);