1 files changed, 105 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/InvocationChainImpl.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/InvocationChainImpl.java
new file mode 100644
index 0000000000..921b4e37fa
--- /dev/null
+++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/InvocationChainImpl.java
@@ -0,0 +1,105 @@
+/*
+ * 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.core.wire;
+
+import org.apache.tuscany.spi.model.Operation;
+import org.apache.tuscany.spi.model.physical.PhysicalOperationDefinition;
+import org.apache.tuscany.spi.wire.Interceptor;
+import org.apache.tuscany.spi.wire.InvocationChain;
+import org.apache.tuscany.spi.wire.TargetInvoker;
+
+/**
+ * Default implementation of an invocation chain
+ *
+ * @version $Rev$ $Date$
+ */
+public class InvocationChainImpl implements InvocationChain {
+    protected Operation operation;
+    protected PhysicalOperationDefinition physicalOperation;
+    protected TargetInvoker targetInvoker;
+    protected Interceptor interceptorChainHead;
+    protected Interceptor interceptorChainTail;
+
+    public InvocationChainImpl(PhysicalOperationDefinition operation) {
+        this.physicalOperation = operation;
+    }
+
+    public InvocationChainImpl(Operation operation) {
+        assert operation != null;
+        this.operation = operation;
+    }
+
+    public Operation getOperation() {
+        return operation;
+    }
+
+    public PhysicalOperationDefinition getPhysicalOperation() {
+        return physicalOperation;
+    }
+
+    public void setTargetInvoker(TargetInvoker invoker) {
+        this.targetInvoker = invoker;
+    }
+
+    public TargetInvoker getTargetInvoker() {
+        return targetInvoker;
+    }
+
+    public void addInterceptor(Interceptor interceptor) {
+        if (interceptorChainHead == null) {
+            interceptorChainHead = interceptor;
+        } else {
+            interceptorChainTail.setNext(interceptor);
+        }
+        interceptorChainTail = interceptor;
+    }
+
+    public void addInterceptor(int index, Interceptor interceptor) {
+        int i = 0;
+        Interceptor next = interceptorChainHead;
+        Interceptor prev = null;
+        while (next != null && i < index) {
+            prev = next;
+            next = next.getNext();
+            i++;
+        }
+        if (i == index) {
+            if (prev != null) {
+                prev.setNext(interceptor);
+            } else {
+                interceptorChainHead = interceptor;
+            }
+            interceptor.setNext(next);
+            if (next == null) {
+                interceptorChainTail = interceptor;
+            }
+        } else {
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
+    }
+
+    public Interceptor getHeadInterceptor() {
+        return interceptorChainHead;
+    }
+
+    public Interceptor getTailInterceptor() {
+        return interceptorChainTail;
+    }
+
+}