added explicit linking of required to externally required interfaces.

[utils] / system / general / src / main / java / org / wamblee / system / graph / component / ConnectRequiredExternallyRequiredEdgeFilter.java

diff --git a/system/general/src/main/java/org/wamblee/system/graph/component/ConnectRequiredExternallyRequiredEdgeFilter.java b/system/general/src/main/java/org/wamblee/system/graph/component/ConnectRequiredExternallyRequiredEdgeFilter.java
new file mode 100644 (file)
index 0000000..598608c
--- /dev/null
+++ b/system/general/src/main/java/org/wamblee/system/graph/component/ConnectRequiredExternallyRequiredEdgeFilter.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2008 the original author or authors.
+ * 
+ * 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.wamblee.system.graph.component;
+
+import org.wamblee.system.graph.Edge;
+import org.wamblee.system.graph.EdgeFilter;
+import org.wamblee.system.graph.EdgeSelector;
+import org.wamblee.system.graph.Node;
+
+/**
+ * Filter used to explicitly connect required and provided interfaces within a
+ * container.
+ * 
+ * @author Erik Brakkee
+ * 
+ */
+public class ConnectRequiredExternallyRequiredEdgeFilter implements EdgeFilter {
+
+    private String _client;
+    private String _required;
+    private String _externalRequired;
+
+    public ConnectRequiredExternallyRequiredEdgeFilter(String aClient, String aRequired,
+            String aExternalRequired) {
+        _client = aClient;
+        _required = aRequired;
+        _externalRequired = aExternalRequired; 
+        if ( _client == null ) { 
+            throw new IllegalArgumentException("Client component must be specified"); 
+        }
+        if ( _required == null ) { 
+            throw new IllegalArgumentException("Required interface must be specified");
+        }
+        if ( _externalRequired == null ) { 
+            throw new IllegalArgumentException("External required interface must be specified");
+        }
+    }
+
+    @Override
+    public boolean isViolated(Edge aEdge) {
+        if (aEdge.getFrom() instanceof RequiredInterfaceNode
+                && aEdge.getTo() instanceof ExternalRequiredInterfaceNode) {
+            return isViolated((RequiredInterfaceNode) aEdge.getFrom(),
+                    (ExternalRequiredInterfaceNode) aEdge.getTo());
+        }
+        return false;
+    }
+
+    private boolean isViolated(RequiredInterfaceNode aFrom,
+            ExternalRequiredInterfaceNode aTo) {
+        if ( !aFrom.getComponent().getName().equals(_client)) { 
+            return false; // wrong component. 
+        }
+        if ( !(_required == null || aFrom.getRequired().getName().equals(_required))) { 
+            return false; // wrong interface
+        }
+        if ( !aTo.getRequired().getName().equals(_externalRequired)) { 
+            return true; // wrong externally required interface.  
+        }
+      
+        return false; 
+    }
+}