1 files changed, 95 insertions, 0 deletions
diff --git a/sandbox/axis2-1.4/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java b/sandbox/axis2-1.4/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java
new file mode 100644
index 0000000000..5d3d8a3a04
--- /dev/null
+++ b/sandbox/axis2-1.4/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java
@@ -0,0 +1,95 @@
+/*
+ * 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.assembly.builder.impl;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Multiplicity;
+import org.apache.tuscany.sca.assembly.OptimizableBinding;
+
+/**
+ * This class encapsulates utility methods to deal with reference definitions
+ *
+ * @version $Rev$ $Date$
+ */
+abstract class ReferenceConfigurationUtil {
+    static boolean isValidMultiplicityOverride(Multiplicity definedMul, Multiplicity overridenMul) {
+        if (definedMul != overridenMul) {
+            switch (definedMul) {
+                case ZERO_N:
+                    return overridenMul == Multiplicity.ZERO_ONE;
+                case ONE_N:
+                    return overridenMul == Multiplicity.ONE_ONE;
+                default:
+                    return false;
+            }
+        } else {
+            return true;
+        }
+    }
+    
+    static boolean validateMultiplicityAndTargets(Multiplicity multiplicity,
+                                                         List<?> targets, List<Binding> bindings) {
+        
+        // Count targets
+        int count = targets.size();
+        
+        //FIXME workaround, this validation is sometimes invoked too early
+        // before we get a chance to init the multiplicity attribute
+        if (multiplicity == null) {
+            return true;
+        }
+        
+        switch (multiplicity) {
+            case ZERO_N:
+                break;
+            case ZERO_ONE:
+                if (count > 1) {
+                    return false;
+                }
+                break;
+            case ONE_ONE:
+                if (count != 1) {
+                    if (count == 0) {
+                        for (Binding binding: bindings) {
+                            if (!(binding instanceof OptimizableBinding) || binding.getURI()!=null) {
+                                return true;
+                            }
+                        }
+                    }
+                    return false;
+                }
+                break;
+            case ONE_N:
+                if (count < 1) {
+                    if (count == 0) {
+                        for (Binding binding: bindings) {
+                            if (!(binding instanceof OptimizableBinding) || binding.getURI()!=null) {
+                                return true;
+                            }
+                        }
+                    }
+                    return false;
+                }
+                break;
+        }
+        return true;
+    }
+}