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author | rfeng <rfeng@13f79535-47bb-0310-9956-ffa450edef68> | 2010-08-17 22:54:09 +0000 |
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committer | rfeng <rfeng@13f79535-47bb-0310-9956-ffa450edef68> | 2010-08-17 22:54:09 +0000 |
commit | 480f588a577948e1a7045cc73ef56c92e09df3a6 (patch) | |
tree | ee776e90a523d1b735f3e3563f4f11b0087f156f /sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java | |
parent | 55b366b52798daae7baae5b2b118b95e188054d0 (diff) |
Implementation spring modules supporting the same classloader between Tuscany and Spring
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@986516 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java')
-rw-r--r-- | sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java b/sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java new file mode 100644 index 0000000000..750956b60a --- /dev/null +++ b/sca-java-2.x/trunk/contrib/modules/implementation-spring-runtime/src/main/java/org/apache/tuscany/sca/implementation/spring/processor/ReferenceAnnotationProcessor.java @@ -0,0 +1,168 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.tuscany.sca.implementation.spring.processor; + +import java.beans.PropertyDescriptor; +import java.lang.annotation.Annotation; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; + +import org.apache.tuscany.sca.implementation.spring.invocation.ComponentWrapper; +import org.oasisopen.sca.annotation.Reference; +import org.springframework.beans.BeanUtils; +import org.springframework.beans.BeansException; +import org.springframework.beans.FatalBeanException; +import org.springframework.beans.factory.config.BeanPostProcessor; +import org.springframework.util.Assert; +import org.springframework.util.ReflectionUtils; + +public class ReferenceAnnotationProcessor implements BeanPostProcessor { + + private Class<? extends Annotation> referenceAnnotationType = Reference.class; + private ComponentWrapper component; + + public ReferenceAnnotationProcessor(ComponentWrapper component) { + this.component = component; + } + + /** + * Gets referece annotation type. + */ + protected Class<? extends Annotation> getReferenceAnnotationType() { + return this.referenceAnnotationType; + } + + /** + * Sets referece annotation type. + */ + public void setReferenceAnnotationType(Class<? extends Annotation> referenceAnnotationType) { + Assert.notNull(referenceAnnotationType, "'referenceAnnotationType' type must not be null."); + this.referenceAnnotationType = referenceAnnotationType; + } + + /** + * This method is used to execute before a bean's initialization callback. + * + * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String) + */ + public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { + processAnnotation(bean); + return bean; + } + + /** + * This method is used to execute after a bean's initialization callback. + * + * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String) + */ + public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { + return bean; + } + + /** + * <p>Processes a beans fields for injection if it has a {@link Reference} annotation.</p> + */ + protected void processAnnotation(final Object bean) { + + final Class<?> clazz = bean.getClass(); + + ReflectionUtils.doWithMethods(clazz, new ReflectionUtils.MethodCallback() { + public void doWith(Method method) { + + Reference annotation = (Reference)method.getAnnotation(getReferenceAnnotationType()); + + if (annotation != null) { + if (Modifier.isStatic(method.getModifiers())) { + throw new IllegalStateException("Reference annotation is not supported on static methods"); + } + + /* + if (Modifier.isPrivate(method.getModifiers())) { + throw new IllegalStateException("Reference annotation is not supported on private methods"); + } + */ + + if (method.getParameterTypes().length == 0) { + throw new IllegalStateException( + "Reference annotation requires at least one argument: " + method); + } + + PropertyDescriptor pd = BeanUtils.findPropertyForMethod(method); + if (pd != null) { + String refName = annotation.name(); + if ("".equals(refName)) { + injectReference(bean, pd, pd.getName()); + } else { + injectReference(bean, pd, refName); + } + } + } + } + }); + + ReflectionUtils.doWithFields(clazz, new ReflectionUtils.FieldCallback() { + public void doWith(Field field) { + + Reference annotation = (Reference)field.getAnnotation(getReferenceAnnotationType()); + + if (annotation != null) { + if (Modifier.isStatic(field.getModifiers())) { + throw new IllegalStateException("Reference annotation is not supported on static fields"); + } + + /* + if (Modifier.isPrivate(field.getModifiers())) { + throw new IllegalStateException("Reference annotation is not supported on private fields"); + } + */ + + ReflectionUtils.makeAccessible(field); + + Object referenceObj = null; + String refName = annotation.name(); + if ("".equals(refName)) { + referenceObj = component.getService(field.getType(), field.getName()); + } else { + referenceObj = component.getService(field.getType(), refName); + } + + if (referenceObj != null) + ReflectionUtils.setField(field, bean, referenceObj); + } + } + }); + } + + /** + * Processes a property descriptor to inject a service. + */ + public void injectReference(Object bean, PropertyDescriptor pd, String name) { + + Object referenceObj = component.getService(pd.getPropertyType(), name); + + if (referenceObj != null) { + try { + pd.getWriteMethod().invoke(bean, new Object[] {referenceObj}); + } catch (Throwable e) { + throw new FatalBeanException("Problem injecting reference: " + e.getMessage(), e); + } + } + } +} |