1 files changed, 176 insertions, 0 deletions
diff --git a/ast-to-instr/src/VHDLSSCNode.java b/ast-to-instr/src/VHDLSSCNode.java
new file mode 100644
index 0000000..95ddfbb
--- /dev/null
+++ b/ast-to-instr/src/VHDLSSCNode.java
@@ -0,0 +1,176 @@
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/* Sequential Statement Chain Node */
+/* Not actually a node in the resulting model, though. */
+public class VHDLSSCNode extends VHDLNode
+{
+   private static final XPathExpression XPE_FIND_SUB_NODES;
+   private final IDs prev_node;
+
+   static
+   {
+      XPE_FIND_SUB_NODES = XMLManager.compile_or_die("./el");
+   }
+
+   public VHDLSSCNode
+   (
+      final IDs parent_id,
+      final Node xml_node,
+      final IDs prev_node, /* can't simply forward ref to SSC */
+      final IDs next_node,
+      final int depth,
+      final String[] attributes
+   )
+   {
+      super
+      (
+         parent_id,
+         xml_node,
+         next_node,
+         depth,
+         attributes
+      );
+
+      this.prev_node = prev_node;
+   }
+
+   @Override
+   public Collection<ParsableXML> parse ()
+   throws XPathExpressionException
+   {
+      final Collection<ParsableXML> result;
+      final NodeList sub_nodes;
+      final int intermediary_nodes_count;
+      int i;
+
+      result = new ArrayList<ParsableXML>();
+
+      sub_nodes =
+         (NodeList) XPE_FIND_SUB_NODES.evaluate
+         (
+            xml_node,
+            XPathConstants.NODESET
+         );
+
+      intermediary_nodes_count = (sub_nodes.getLength() - 1);
+
+      for (i = 0; i < intermediary_nodes_count; ++i)
+      {
+         final IDs next_node;
+
+         next_node =
+            IDs.get_id_from_xml_id
+            (
+               XMLManager.get_attribute
+               (
+                  sub_nodes.item(i + 1),
+                  "id"
+               ),
+               "node"
+            );
+
+         result.add(get_vhdl_node(sub_nodes.item(i), next_node, i));
+      }
+
+      result.add(get_vhdl_node(sub_nodes.item(i), next_node, i));
+
+      handle_backward_connection(sub_nodes.item(0));
+
+      return result;
+   }
+
+   private ParsableXML get_vhdl_node
+   (
+      final Node node,
+      final IDs next_node,
+      final int i
+   )
+   {
+      final String node_kind;
+      final String[] attributes;
+
+      node_kind = XMLManager.get_attribute(node, "kind");
+
+      if (i == 0)
+      {
+         /* Attributes are only inherited by the first node */
+         attributes = this.attributes;
+      }
+      else
+      {
+         attributes = new String[0];
+      }
+
+      if (node_kind.equals("if_statement"))
+      {
+         return new VHDLISNode(parent_id, node, next_node, depth, attributes);
+      }
+      else if (node_kind.equals("simple_signal_assignment_statement"))
+      {
+         return new VHDLSSASNode(parent_id, node, next_node, depth, attributes);
+      }
+      else if (node_kind.equals("case_statement"))
+      {
+         return new VHDLCSNode(parent_id, node, next_node, depth, attributes);
+      }
+
+      System.err.println
+      (
+         "[E] Unimplemented instruction kind \""
+         + node_kind
+         + "\" found in Sequential Statement Chain."
+      );
+
+      System.exit(-1);
+
+      return null;
+   }
+
+   private void handle_backward_connection
+   (
+      final Node first_node
+   )
+   {
+      final IDs first_node_id;
+
+      first_node_id =
+         IDs.get_id_from_xml_id
+         (
+            XMLManager.get_attribute
+            (
+               first_node,
+               "id"
+            ),
+            "node"
+         );
+
+      if (prev_node == null)
+      {
+         /* First node of the process */
+         Predicates.add_entry
+         (
+            "is_start_node",
+            first_node_id,
+            parent_id
+         );
+      }
+      else
+      {
+         /* First node of the process */
+         Predicates.add_entry
+         (
+            "connect_to",
+            prev_node,
+            first_node_id
+         );
+      }
+   }
+}