1 files changed, 130 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.0.1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InvocationChainImpl.java b/sca-java-1.x/tags/1.0.1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InvocationChainImpl.java
new file mode 100644
index 0000000000..72ce0f87fb
--- /dev/null
+++ b/sca-java-1.x/tags/1.0.1/modules/core/src/main/java/org/apache/tuscany/sca/core/invocation/InvocationChainImpl.java
@@ -0,0 +1,130 @@
+/*
+ * 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.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Invoker;
+
+/**
+ * Default implementation of an invocation chain
+ * 
+ * @version $Rev$ $Date$
+ */
+public class InvocationChainImpl implements InvocationChain {
+    private Operation sourceOperation;
+    private Operation targetOperation;
+    private Invoker invokerChainHead;
+    private Invoker invokerChainTail;
+
+    public InvocationChainImpl(Operation operation) {
+        assert operation != null;
+        this.targetOperation = operation;
+        this.sourceOperation = operation;
+    }
+
+    public InvocationChainImpl(Operation sourceOperation, Operation targetOperation) {
+        assert sourceOperation != null;
+        assert targetOperation != null;
+        this.targetOperation = targetOperation;
+        this.sourceOperation = sourceOperation;
+    }
+
+    public Operation getTargetOperation() {
+        return targetOperation;
+    }
+
+    public void setTargetOperation(Operation operation) {
+        this.targetOperation = operation;
+    }
+
+    public void addInterceptor(Interceptor interceptor) {
+        if (invokerChainHead == null) {
+            invokerChainHead = interceptor;
+        } else {
+            if (invokerChainHead instanceof Interceptor) {
+                ((Interceptor)invokerChainTail).setNext(interceptor);
+            }
+        }
+        invokerChainTail = interceptor;
+    }
+
+    public void addInvoker(Invoker invoker) {
+        if (invokerChainHead == null) {
+            invokerChainHead = invoker;
+        } else {
+            if (invokerChainTail instanceof Interceptor) {
+                ((Interceptor)invokerChainTail).setNext(invoker);
+            }
+        }
+        invokerChainTail = invoker;
+    }
+
+    public Invoker getHeadInvoker() {
+        return invokerChainHead;
+    }
+
+    public Invoker getTailInvoker() {
+        return invokerChainTail;
+    }
+    
+    /**
+     * @return the sourceOperation
+     */
+    public Operation getSourceOperation() {
+        return sourceOperation;
+    }
+
+    /**
+     * @param sourceOperation the sourceOperation to set
+     */
+    public void setSourceOperation(Operation sourceOperation) {
+        this.sourceOperation = sourceOperation;
+    }
+
+    public void addInterceptor(int index, Interceptor interceptor) {
+        int i = 0;
+        Invoker next = invokerChainHead;
+        Invoker prev = null;
+        while (next != null && i < index) {
+            prev = next;
+            if (next instanceof Interceptor) {
+                next = ((Interceptor)next).getNext();
+                i++;
+            } else {
+                throw new ArrayIndexOutOfBoundsException(index);
+            }
+        }
+        if (i == index) {
+            if (prev != null) {
+                ((Interceptor)prev).setNext(interceptor);
+            } else {
+                invokerChainHead = interceptor;
+            }
+            interceptor.setNext(next);
+            if (next == null) {
+                invokerChainTail = interceptor;
+            }
+        } else {
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
+    }
+
+}