diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java b/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java new file mode 100644 index 0000000000..33fa9238b6 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-final/java/sca/containers/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java @@ -0,0 +1,93 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * 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.apache.tuscany.container.java.invocation; + +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.util.Set; + +import org.apache.tuscany.core.config.JavaIntrospectionHelper; +import org.apache.tuscany.core.context.TargetException; +import org.apache.tuscany.core.wire.Interceptor; +import org.apache.tuscany.core.wire.InvocationRuntimeException; +import org.apache.tuscany.core.wire.TargetInvoker; +import org.apache.tuscany.core.message.Message; + +/** + * Base class for dispatching to a Java based component implementation. Subclasses implement a strategy for resolving + * implementation instances. + * + * @version $Rev$ $Date$ + */ +public abstract class AbstractJavaComponentInvoker implements TargetInvoker { + + protected Method operation; + + public AbstractJavaComponentInvoker(Method operation) { + assert (operation != null) : "Operation method cannot be null"; + this.operation = operation; + } + + public Object invokeTarget(Object payload) throws InvocationTargetException { + try { + Object instance = getInstance(); + if (!operation.getDeclaringClass().isInstance(instance)) { + Set<Method> methods = JavaIntrospectionHelper.getAllUniqueMethods(instance.getClass()); + Method newOperation = JavaIntrospectionHelper.findClosestMatchingMethod(operation.getName(), operation + .getParameterTypes(), methods); + if (newOperation != null) + operation = newOperation; + } + if (payload != null && !payload.getClass().isArray()) { + return operation.invoke(instance, payload); + } else { + return operation.invoke(instance, (Object[]) payload); + } + } catch (IllegalAccessException e) { + throw new InvocationRuntimeException(e); + } + } + + public Message invoke(Message msg) { + try { + Object resp = invokeTarget(msg.getBody()); + msg.setBody(resp); + } catch (InvocationTargetException e) { + msg.setBody(e.getCause()); + } catch (Throwable e) { + msg.setBody(e); + } + return msg; + } + + protected abstract Object getInstance() throws TargetException; + + public void setNext(Interceptor next) { + throw new IllegalStateException("This interceptor must be the last interceptor in an interceptor chain"); + } + + @Override + public Object clone() throws CloneNotSupportedException { + try { + AbstractJavaComponentInvoker clone = (AbstractJavaComponentInvoker) super.clone(); + clone.operation = this.operation; + return clone; + } catch (CloneNotSupportedException e) { + return null; // will not happen + } + } +} |