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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.99/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/CallbackInterfaceInterceptor.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.99/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/CallbackInterfaceInterceptor.java | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.99/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/CallbackInterfaceInterceptor.java b/sca-java-1.x/branches/sca-java-0.99/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/CallbackInterfaceInterceptor.java new file mode 100644 index 0000000000..219dc55536 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.99/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/CallbackInterfaceInterceptor.java @@ -0,0 +1,57 @@ +/* + * 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.core.invocation; + +import org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.osoa.sca.NoRegisteredCallbackException; + +/** + * An interceptor applied to the forward direction of a wire that ensures the callback target implements the required + * service contract. This is required as callback targets may be set dynamically by service implementations. + * + * @version $Rev$ $Date$ + */ +public class CallbackInterfaceInterceptor implements Interceptor { + private boolean invokingServiceImplements; + private Invoker next; + + public CallbackInterfaceInterceptor(boolean invokingServiceImplements) { + this.invokingServiceImplements = invokingServiceImplements; + } + + public Message invoke(Message msg) { + // TODO check in the context if a callback object is set, if so invoke next since the setCallback will + // perform the check + if (!invokingServiceImplements) { + throw new NoRegisteredCallbackException("Callback target does not implement the callback interface"); + } + return next.invoke(msg); + } + + public void setNext(Invoker next) { + this.next = next; + } + + public Invoker getNext() { + return next; + } + +} |