roverlay/depres/: replace rule pool export_rules()

2 files changed, 24 insertions, 13 deletions

diff --git a/roverlay/depres/deprule.py b/roverlay/depres/deprule.py
index 1d36941..ed6084d 100644
--- a/roverlay/depres/deprule.py
+++ b/roverlay/depres/deprule.py
@@ -40,6 +40,10 @@ class DependencyRule ( object ):
 
    make_result = _make_result
 
+   def export_rule ( self ):
+      raise NotImplementedError()
+   # --- end of export_rule (...) ---
+
 # --- end of DependencyRule ---
 
 
@@ -149,3 +153,22 @@ class DependencyRulePool ( object ):
       # default return
       return None
    # --- end of matches (...) ---
+
+   def export_rules ( self ):
+      """Exports all rules. Typically, this generates text lines."""
+      for rule in self.rules:
+         for item in rule.export_rule():
+            yield item
+   # --- end of export_rules (...) ---
+
+   def export_rules_into ( self, fh ):
+      """Writes all rules into the given file handle.
+
+      arguments:
+      * fh --
+      """
+      NL = '\n'
+      for item in self.export_rules():
+         fh.write ( str ( item ) )
+         fh.write ( NL )
+# --- end of DependencyRulePool ---
diff --git a/roverlay/depres/simpledeprule/pool.py b/roverlay/depres/simpledeprule/pool.py
index 6fcb714..677ad20 100644
--- a/roverlay/depres/simpledeprule/pool.py
+++ b/roverlay/depres/simpledeprule/pool.py
@@ -16,6 +16,7 @@ from roverlay.depres import deprule
 from roverlay.depres.simpledeprule.abstractrules import SimpleRule
 
 class SimpleDependencyRulePool ( deprule.DependencyRulePool ):
+
    def __init__ ( self, name, priority=70, **kw ):
       """Initializes a SimpleDependencyRulePool, which is a DependencyRulePool
       specialized in simple dependency rules;
@@ -43,16 +44,3 @@ class SimpleDependencyRulePool ( deprule.DependencyRulePool ):
       else:
          raise Exception ( "bad usage (simple dependency rule expected)." )
    # --- end of add (...) ---
-
-   def export_rules ( self, fh ):
-      """Exports all rules from this pool into the given file handle.
-
-      arguments:
-      * fh -- object that has a writelines ( list ) method
-
-      raises: IOError (fh)
-      """
-      for rule in self.rules:
-         fh.write ( str ( rule ) )
-         fh.write ( '\n' )
-   # --- end of export_rules (...) ---