1 files changed, 67 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AbstractScopeStrategy.java b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AbstractScopeStrategy.java
new file mode 100644
index 0000000000..f89d09196d
--- /dev/null
+++ b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/main/java/org/apache/tuscany/core/context/scope/AbstractScopeStrategy.java
@@ -0,0 +1,67 @@
+/**
+ * 
+ * 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.core.context.scope;
+
+import org.apache.tuscany.core.context.ScopeStrategy;
+import org.apache.tuscany.model.assembly.Scope;
+
+/**
+ * Implements basic scope strategy functionality
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class AbstractScopeStrategy implements ScopeStrategy {
+
+    public AbstractScopeStrategy() {
+    }
+
+    /**
+     * Determines legal scope references according to standard SCA scope rules
+     * 
+     * @param pReferrer the scope of the component making the reference
+     * @param pReferee the scope of the component being referred to
+     */
+    public boolean downScopeReference(Scope pReferrer, Scope pReferee) {
+        if (pReferrer == Scope.UNDEFINED || pReferee == Scope.UNDEFINED) {
+            return false;
+        }
+        if (pReferee == pReferrer){
+            return false;
+        }else if(pReferrer == Scope.INSTANCE){
+            return false;
+        }else if(pReferee == Scope.INSTANCE){
+            return true;
+        }else if (pReferrer == Scope.REQUEST && pReferee == Scope.SESSION){
+            return false;
+        }else if (pReferrer == Scope.REQUEST && pReferee == Scope.MODULE){
+            return false;
+//        }else if (pReferrer == Scope.SESSION && pReferee == Scope.REQUEST){
+//            return true;
+        }else if (pReferrer == Scope.SESSION && pReferee == Scope.MODULE){
+            return false;
+//        }else if (pReferrer == Scope.MODULE){
+//            return true;
+        }else{
+            return true;
+        }
+        //FIXME Jim this does not work with enumerations, what does it mean to have a scope <0?
+//        } else if ((pReferrer < 0) || (pReferee < 0)) {
+//            return false;
+//        }
+//
+//      return (pReferrer > pReferee);
+//        return pReferrer != pReferee;
+    }
+
+}