edit boa task

boa/aufgabe_01_a.boa

@@ -0,0 +1,25 @@
+# Java-Job: 111005
+# Python-Job: 111006
+
+# Includes all revisions
+p: Project = input;
+
+# Prepare output variables
+relative_list: output mean[string] of float;
+
+statement_counter := visitor {
+    before node: Statement -> {
+        if(node.kind == StatementKind.TRY or node.kind == StatementKind.WITH)
+            relative_list[p.name] << 1;
+        else
+            relative_list[p.name] << 0;
+    }
+};
+
+visit(p, visitor {
+    before node: CodeRepository -> {
+        snapshot := getsnapshot(node);
+        foreach (i: int; def(snapshot[i]))
+            visit(snapshot[i], statement_counter);
+    }
+});

boa/aufgabe_01_b.boa

@@ -0,0 +1,46 @@
+# Java-Job: 111128
+# Python-Job: 111124
+
+# Includes all revisions
+p: Project = input;
+
+# Prepare output variables
+relative_list: output mean[string][int] of float;
+
+# Temporary variables
+cur_date: time;
+
+statement_counter := visitor {
+    before node: Statement -> {
+        if(node.kind == StatementKind.TRY or node.kind == StatementKind.WITH)
+            relative_list[p.name][yearof(cur_date)] << 1;
+        else
+            relative_list[p.name][yearof(cur_date)] << 0;
+    }
+};
+
+
+visit(p, visitor {
+    before node: CodeRepository -> {
+        for (minus_year: int=22; minus_year >= 0; minus_year--) {
+            cur_date = addyear(now(), -minus_year);
+            snapshot := getsnapshot(node, cur_date);
+            foreach (i: int; def(snapshot[i]))
+                visit(snapshot[i], statement_counter);
+        }
+    }
+});
+
+visit(p, visitor {
+    before node: CodeRepository -> {
+        for (minus_year: int=22; minus_year >= 0; minus_year--) {
+            cur_date = addyear(now(), -minus_year);
+            snapshot := getsnapshot(node, cur_date);
+
+            if (def(snapshot))
+                foreach (i: int; def(snapshot[i]))
+                    visit(snapshot[i], statement_counter);
+        }
+    }
+});
+