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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/MethodInjector.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/MethodInjector.java b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/MethodInjector.java new file mode 100644 index 0000000000..cd43a60ab6 --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/MethodInjector.java @@ -0,0 +1,83 @@ +/* + * 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.java.injection; + +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.Type; +import java.security.AccessController; +import java.security.PrivilegedAction; + +import org.apache.tuscany.sca.core.factory.ObjectCreationException; +import org.apache.tuscany.sca.core.factory.ObjectFactory; + +/** + * Injects a value created by an {@link org.apache.tuscany.sca.core.factory.ObjectFactory} using a given method + * + * @version $Rev$ $Date$ + */ +public class MethodInjector<T> implements Injector<T> { + private final Method method; + private final ObjectFactory<?> objectFactory; + + public MethodInjector(Method aMethod, ObjectFactory<?> objectFactory) { + assert aMethod != null; + assert objectFactory != null; + this.method = aMethod; + // Allow privileged access to set accessibility. Requires ReflectPermission in security + // policy. + AccessController.doPrivileged(new PrivilegedAction<Object>() { + public Object run() { + method.setAccessible(true); + return null; + } + }); + this.objectFactory = objectFactory; + } + + public void inject(T instance) throws ObjectCreationException { + inject(instance, objectFactory.getInstance()); + } + + private void inject(T instance, Object value) { + try { + method.invoke(instance, value); + } catch (IllegalAccessException e) { + throw new ObjectCreationException("Method is not accessible [" + method + "]", e); + } catch (IllegalArgumentException e) { + throw new ObjectCreationException("Exception thrown by setter: " + method.getName(), e); + } catch (InvocationTargetException e) { + throw new ObjectCreationException("Exception thrown by setter: " + method.getName(), e); + } + } + + public Class<?> getType() { + return method.getParameterTypes()[0]; + } + + public Type getGenericType() { + return method.getGenericParameterTypes()[0]; + } + + public void injectNull(T instance) throws ObjectCreationException { + inject(instance, null); + } + + +} |