model_collect: uniformize documentation
[nit.git] / src / model / model_collect.nit
index 79970e5..6f24953 100644 (file)
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Collect things from a `Model`.
+# Collect things from a `ModelView`
+#
+# This module introduce several usefull methods to list and count things from a
+# ModelView.
+#
+# First setup you view from a Model:
+#
+# ~~~nitih
+# var view = new ModelView(model)
+# ~~~
+#
+# Then ask question using the view:
+#
+# ~~~nitish
+# print number of parents for `{my_class}`
+# print my_class.collect_parents(view).count
+# ~~~
 #
 # **Warning**
 #
 # `model_collect` offers a flattened view of the model without considering any
 # main module.
 # For this reason, `model_collect` lists all the definitions reachable from all
-# modules
+# modules.
 #
 # This is usefull for tools that need a global view of a model like `nitdoc`,
-# `nitx` or `nituml`.
-# It shoul not be used for compiling stuffs like computing VFT, where the listed
+# `nitx`, `nitmetrics` or `nituml`.
+# It should not be used for compiling stuffs like computing VFT, where the listed
 # entities could not be reachable depending on the modules really imported.
 module model_collect
 
@@ -33,9 +49,93 @@ import model_views
 
 redef class MEntity
 
-       # Collect modifier keywords like `redef`, `private` etc.
-       fun collect_modifiers: Array[String] do
-               return new Array[String]
+       # FIXME used to bypass RTA limitation on type resolution
+       type MENTITY: SELF
+
+       # Collect modifier keywords like `redef`, `private` etc
+       fun collect_modifiers: Array[String] do return new Array[String]
+
+       # Collect `self` linearization anchored on `mainmodule`
+       fun collect_linearization(mainmodule: MModule): nullable Array[MEntity] do
+               return null
+       end
+
+       # Collect `self` ancestors (direct and indirect)
+       #
+       # The concept of ancestor is abstract at this stage.
+       fun collect_ancestors(view: ModelView): Set[MENTITY] do
+               var done = new HashSet[MENTITY]
+               var todo = new Array[MENTITY]
+
+               todo.add_all collect_parents(view)
+               while todo.not_empty do
+                       var mentity = todo.pop
+                       if mentity == self or done.has(mentity) then continue
+                       done.add mentity
+                       todo.add_all mentity.collect_parents(view)
+               end
+               return done
+       end
+
+       # Collect `self` parents (direct ancestors)
+       #
+       # The concept of parent is abstract at this stage.
+       fun collect_parents(view: ModelView): Set[MENTITY] is abstract
+
+       # Collect `self` children (direct descendants)
+       #
+       # The concept of child is abstract at this stage.
+       fun collect_children(view: ModelView): Set[MENTITY] is abstract
+
+       # Collect `self` descendants (direct and direct)
+       #
+       # The concept of descendant is abstract at this stage.
+       fun collect_descendants(view: ModelView): Set[MENTITY] do
+               var done = new HashSet[MENTITY]
+               var todo = new Array[MENTITY]
+
+               todo.add_all collect_children(view)
+               while todo.not_empty do
+                       var mentity = todo.pop
+                       if mentity == self or done.has(mentity) then continue
+                       done.add mentity
+                       todo.add_all mentity.collect_children(view)
+               end
+               return done
+       end
+
+       # Build a poset representing `self` in it's own hierarchy
+       #
+       # The notion of hierarchy depends on the type of MEntity.
+       #
+       # Here a recap:
+       # * `MPackage`: package dependencies
+       # * `MGroup`: group dependencies
+       # * `MModule`: modules imports
+       # * `MClass`: class inheritance (all classdefs flattened)
+       # * `MClassDef`: classdef inheritance
+       # * `MProperty`: property definitions graph (all propdefs flattened)
+       # * `MPropDef`: property definitions graph
+       fun hierarchy_poset(view: ModelView): POSet[MENTITY] do
+               var done = new HashSet[MENTITY]
+               var mentities = new Array[MENTITY]
+               mentities.add self
+               var poset = new POSet[MENTITY]
+               while mentities.not_empty do
+                       var mentity = mentities.pop
+                       if done.has(mentity) then continue
+                       done.add mentity
+                       poset.add_node mentity
+                       for parent in mentity.collect_parents(view) do
+                               poset.add_edge(mentity, parent)
+                               mentities.add parent
+                       end
+                       for child in mentity.collect_children(view) do
+                               poset.add_edge(child, mentity)
+                               mentities.add child
+                       end
+               end
+               return poset
        end
 end
 
@@ -45,6 +145,40 @@ redef class MPackage
                res.add "package"
                return res
        end
+
+       # Collect all packages directly imported by `self`
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               for mgroup in mgroups do
+                       for parent in mgroup.collect_parents(view) do
+                               var mpackage = parent.mpackage
+                               if mpackage == self or not view.accept_mentity(mpackage) then continue
+                               res.add(mpackage)
+                       end
+               end
+               return res
+       end
+
+       # Collect all packages that directly depends on `self`
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               for mpackage in view.mpackages do
+                       if mpackage.collect_parents(view).has(self) then res.add mpackage
+               end
+               return res
+       end
+
+       # Collect all modules contained in `self`
+       fun collect_mmodules(view: ModelView): HashSet[MModule] do
+               var res = new HashSet[MModule]
+               for mgroup in mgroups do
+                       for mmodule in mgroup.mmodules do
+                               if not view.accept_mentity(mmodule) then continue
+                               res.add(mmodule)
+                       end
+               end
+               return res
+       end
 end
 
 redef class MGroup
@@ -53,6 +187,30 @@ redef class MGroup
                res.add "group"
                return res
        end
+
+       # Collect all groups directly import by `self`
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               for mmodule in mmodules do
+                       for parent in mmodule.collect_parents(view) do
+                               var mgroup = parent.mgroup
+                               if mgroup == null or mgroup == self then continue
+                               if not view.accept_mentity(mgroup) then continue
+                               res.add(mgroup)
+                       end
+               end
+               return res
+       end
+
+       # Collect all group that directly import `self`
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               for mgroup in view.mgroups do
+                       if mgroup == self or not view.accept_mentity(mgroup) then continue
+                       if mgroup.collect_parents(view).has(self) then res.add mgroup
+               end
+               return res
+       end
 end
 
 redef class MModule
@@ -63,9 +221,9 @@ redef class MModule
                return res
        end
 
-       # Collect all transitive imports.
-       fun collect_ancestors(view: ModelView): Set[MModule] do
-               var res = new HashSet[MModule]
+       # Collect all module ancestors of `self` (direct and transitive imports)
+       redef fun collect_ancestors(view) do
+               var res = new HashSet[MENTITY]
                for mentity in in_importation.greaters do
                        if mentity == self then continue
                        if not view.accept_mentity(mentity) then continue
@@ -74,9 +232,9 @@ redef class MModule
                return res
        end
 
-       # Collect direct imports.
-       fun collect_parents(view: ModelView): Set[MModule] do
-               var res = new HashSet[MModule]
+       # Collect all modules directly imported by `self`
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
                for mentity in in_importation.direct_greaters do
                        if mentity == self then continue
                        if not view.accept_mentity(mentity) then continue
@@ -85,9 +243,9 @@ redef class MModule
                return res
        end
 
-       # Collect direct children (modules that directly import `self`).
-       fun collect_children(view: ModelView): Set[MModule] do
-               var res = new HashSet[MModule]
+       # Collect all modules that directly import `self`
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
                for mentity in in_importation.direct_smallers do
                        if mentity == self then continue
                        if not view.accept_mentity(mentity) then continue
@@ -96,9 +254,9 @@ redef class MModule
                return res
        end
 
-       # Collect all transitive children.
-       fun collect_descendants(view: ModelView): Set[MModule] do
-               var res = new HashSet[MModule]
+       # Collect all module descendants of `self` (direct and transitive imports)
+       redef fun collect_descendants(view) do
+               var res = new HashSet[MENTITY]
                for mentity in in_importation.smallers do
                        if mentity == self then continue
                        if not view.accept_mentity(mentity) then continue
@@ -107,16 +265,7 @@ redef class MModule
                return res
        end
 
-       # Build the importation poset for `self`
-       fun importation_poset(view: ModelView): POSet[MModule] do
-               var mmodules = new HashSet[MModule]
-               mmodules.add self
-               mmodules.add_all collect_ancestors(view)
-               mmodules.add_all collect_descendants(view)
-               return view.mmodules_poset(mmodules)
-       end
-
-       # Collect mclassdefs introduced in `self` with `visibility >= to min_visibility`.
+       # Collect all class definitions introduced in `self`
        fun collect_intro_mclassdefs(view: ModelView): Set[MClassDef] do
                var res = new HashSet[MClassDef]
                for mclassdef in mclassdefs do
@@ -127,7 +276,7 @@ redef class MModule
                return res
        end
 
-       # Collect mclassdefs redefined in `self` with `visibility >= to min_visibility`.
+       # Collect all class definitions refined in `self`
        fun collect_redef_mclassdefs(view: ModelView): Set[MClassDef] do
                var res = new HashSet[MClassDef]
                for mclassdef in mclassdefs do
@@ -138,7 +287,7 @@ redef class MModule
                return res
        end
 
-       # Collect mclasses introduced in `self` with `visibility >= to min_visibility`.
+       # Collect all classes introduced in `self`
        fun collect_intro_mclasses(view: ModelView): Set[MClass] do
                var res = new HashSet[MClass]
                for mclass in intro_mclasses do
@@ -148,7 +297,7 @@ redef class MModule
                return res
        end
 
-       # Collect mclasses redefined in `self` with `visibility >= to min_visibility`.
+       # Collect all classes refined in `self`
        fun collect_redef_mclasses(view: ModelView): Set[MClass] do
                var mclasses = new HashSet[MClass]
                for mclassdef in mclassdefs do
@@ -163,71 +312,55 @@ redef class MClass
 
        redef fun collect_modifiers do return intro.collect_modifiers
 
-       # Collect direct parents of `self` with `visibility >= to min_visibility`.
-       fun collect_parents(view: ModelView): Set[MClass] do
-               var res = new HashSet[MClass]
-               for mclassdef in mclassdefs do
-                       for mclasstype in mclassdef.supertypes do
-                               var mclass = mclasstype.mclass
-                               if not view.accept_mentity(mclass) then continue
-                               res.add(mclass)
-                       end
-               end
-               return res
+       redef fun collect_linearization(mainmodule) do
+               var mclassdefs = self.mclassdefs.to_a
+               mainmodule.linearize_mclassdefs(mclassdefs)
+               return mclassdefs
        end
 
-       # Collect all ancestors of `self` with `visibility >= to min_visibility`.
-       fun collect_ancestors(view: ModelView): Set[MClass] do
-               var res = new HashSet[MClass]
-               for mclassdef in self.mclassdefs do
-                       for super_mclassdef in mclassdef.in_hierarchy.greaters do
-                               if super_mclassdef == mclassdef then continue  # skip self
-                               var mclass = super_mclassdef.mclass
-                               if not view.accept_mentity(mclass) then continue
-                               res.add(mclass)
+       # Collect all direct parents of `self`
+       #
+       # This method uses a flattened hierarchy containing all the mclassdefs.
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               for mclassdef in mclassdefs do
+                       for parent in mclassdef.collect_parents(view) do
+                               var mclass = parent.mclass
+                               if mclass == self or not view.accept_mentity(parent) then continue
+                               res.add mclass
                        end
                end
                return res
        end
 
-       # Collect direct children of `self` with `visibility >= to min_visibility`.
-       fun collect_children(view: ModelView): Set[MClass] do
-               var res = new HashSet[MClass]
-               for mclassdef in self.mclassdefs do
-                       for sub_mclassdef in mclassdef.in_hierarchy.direct_smallers do
-                               if sub_mclassdef == mclassdef then continue  # skip self
-                               var mclass = sub_mclassdef.mclass
-                               if not view.accept_mentity(mclass) then continue
-                               res.add(mclass)
+       # Collect all ancestors of `self`
+       redef fun collect_ancestors(view) do
+               var res = new HashSet[MENTITY]
+               for mclassdef in mclassdefs do
+                       for parent in mclassdef.collect_parents(view) do
+                               if not view.accept_mentity(parent) then continue
+                               res.add parent.mclass
                        end
                end
                return res
        end
 
-       # Collect all descendants of `self` with `visibility >= to min_visibility`.
-       fun collect_descendants(view: ModelView): Set[MClass] do
-               var res = new HashSet[MClass]
-               for mclassdef in self.mclassdefs do
-                       for sub_mclassdef in mclassdef.in_hierarchy.smallers do
-                               if sub_mclassdef == mclassdef then continue  # skip self
-                               var mclass = sub_mclassdef.mclass
-                               if not view.accept_mentity(mclass) then continue
-                               res.add(mclass)
+       # Collect all direct children of `self`
+       #
+       # This method uses a flattened hierarchy containing all the mclassdefs.
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               for mclassdef in mclassdefs do
+                       for child in mclassdef.collect_children(view) do
+                               var mclass = child.mclass
+                               if mclass == self or not view.accept_mentity(child) then continue
+                               res.add mclass
                        end
                end
                return res
        end
 
-       # Build a class hierarchy poset for `self` based on its ancestors and descendants.
-       fun hierarchy_poset(mainmodule: MModule, view: ModelView): POSet[MClass] do
-               var mclasses = new HashSet[MClass]
-               mclasses.add self
-               mclasses.add_all collect_ancestors(view)
-               mclasses.add_all collect_descendants(view)
-               return view.mclasses_poset(mainmodule, mclasses)
-       end
-
-       # Collect all mproperties introduced in 'self' with `visibility >= min_visibility`.
+       # Collect all properties introduced in `self`
        fun collect_intro_mproperties(view: ModelView): Set[MProperty] do
                var set = new HashSet[MProperty]
                for mclassdef in mclassdefs do
@@ -239,7 +372,7 @@ redef class MClass
                return set
        end
 
-       # Collect all mproperties redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all properties redefined in `self`
        fun collect_redef_mproperties(view: ModelView): Set[MProperty] do
                var set = new HashSet[MProperty]
                for mclassdef in mclassdefs do
@@ -252,7 +385,7 @@ redef class MClass
                return set
        end
 
-       # Collect mproperties introduced and redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all properties introduced and redefined in `self`
        fun collect_local_mproperties(view: ModelView): Set[MProperty] do
                var set = new HashSet[MProperty]
                set.add_all collect_intro_mproperties(view)
@@ -260,7 +393,7 @@ redef class MClass
                return set
        end
 
-       # Collect all mproperties inehrited by 'self' with `visibility >= min_visibility`.
+       # Collect all properties inehrited by `self`
        fun collect_inherited_mproperties(view: ModelView): Set[MProperty] do
                var set = new HashSet[MProperty]
                for parent in collect_parents(view) do
@@ -270,9 +403,9 @@ redef class MClass
                return set
        end
 
-       # Collect all mproperties accessible by 'self' with `visibility >= min_visibility`.
+       # Collect all properties accessible by `self`
        #
-       # This include introduced, redefined, inherited mproperties.
+       # This include introduced, redefined, inherited properties.
        fun collect_accessible_mproperties(view: ModelView): Set[MProperty] do
                var set = new HashSet[MProperty]
                set.add_all(collect_intro_mproperties(view))
@@ -281,7 +414,7 @@ redef class MClass
                return set
        end
 
-       # Collect mmethods introduced in 'self' with `visibility >= min_visibility`.
+       # Collect all methods introduced in `self`
        fun collect_intro_mmethods(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_intro_mproperties(view) do
@@ -290,7 +423,7 @@ redef class MClass
                return res
        end
 
-       # Collect mmethods redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all methods redefined in `self`
        fun collect_redef_mmethods(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_redef_mproperties(view) do
@@ -299,7 +432,7 @@ redef class MClass
                return res
        end
 
-       # Collect mmethods introduced and redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all methods introduced and redefined in `self`
        fun collect_local_mmethods(view: ModelView): Set[MMethod] do
                var set = new HashSet[MMethod]
                set.add_all collect_intro_mmethods(view)
@@ -307,7 +440,7 @@ redef class MClass
                return set
        end
 
-       # Collect mmethods inherited by 'self' if accepted by `view`.
+       # Collect all methods inherited by `self`
        fun collect_inherited_mmethods(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_inherited_mproperties(view) do
@@ -316,7 +449,18 @@ redef class MClass
                return res
        end
 
-       # Collect mattributes introduced in 'self' with `visibility >= min_visibility`.
+       # Collect all methods accessible by `self`
+       #
+       # This include introduced, redefined, inherited methods.
+       fun collect_accessible_mmethods(view: ModelView): Set[MMethod] do
+               var set = new HashSet[MMethod]
+               set.add_all(collect_intro_mmethods(view))
+               set.add_all(collect_redef_mmethods(view))
+               set.add_all(collect_inherited_mmethods(view))
+               return set
+       end
+
+       # Collect all attributes introduced in `self`
        fun collect_intro_mattributes(view: ModelView): Set[MAttribute] do
                var res = new HashSet[MAttribute]
                for mproperty in collect_intro_mproperties(view) do
@@ -325,7 +469,7 @@ redef class MClass
                return res
        end
 
-       # Collect mattributes redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all attributes redefined in `self`
        fun collect_redef_mattributes(view: ModelView): Set[MAttribute] do
                var res = new HashSet[MAttribute]
                for mproperty in collect_redef_mproperties(view) do
@@ -334,7 +478,7 @@ redef class MClass
                return res
        end
 
-       # Collect mattributes introduced and redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all attributes introduced and redefined in `self`
        fun collect_local_mattributes(view: ModelView): Set[MAttribute] do
                var set = new HashSet[MAttribute]
                set.add_all collect_intro_mattributes(view)
@@ -342,7 +486,7 @@ redef class MClass
                return set
        end
 
-       # Collect mattributes inherited by 'self' with `visibility >= min_visibility`.
+       # Collect all attributes inherited by `self`
        fun collect_inherited_mattributes(view: ModelView): Set[MAttribute] do
                var res = new HashSet[MAttribute]
                for mproperty in collect_inherited_mproperties(view) do
@@ -351,7 +495,7 @@ redef class MClass
                return res
        end
 
-       # Collect all mattributes accessible by 'self' with `visibility >= min_visibility`.
+       # Collect all attributes accessible by `self`
        #
        # This include introduced, redefined, inherited mattributes.
        fun collect_accessible_mattributes(view: ModelView): Set[MAttribute] do
@@ -362,7 +506,7 @@ redef class MClass
                return set
        end
 
-       # Collect init mmethods introduced in 'self' if accepted by `view`.
+       # Collect all init methods introduced in `self`
        fun collect_intro_inits(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_intro_mmethods(view) do
@@ -371,7 +515,7 @@ redef class MClass
                return res
        end
 
-       # Collect init mmethods redefined in 'self' if accepted by `view`.
+       # Collect all init methods redefined in `self`
        fun collect_redef_inits(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_redef_mmethods(view) do
@@ -380,7 +524,7 @@ redef class MClass
                return res
        end
 
-       # Collect init mmethods introduced and redefined in 'self' if accepted by `view`.
+       # Collect all init methods introduced and redefined in `self`
        fun collect_local_inits(view: ModelView): Set[MMethod] do
                var set = new HashSet[MMethod]
                set.add_all collect_intro_inits(view)
@@ -388,7 +532,7 @@ redef class MClass
                return set
        end
 
-       # Collect init mmethods inherited by 'self'  if accepted by `view`.
+       # Collect all init methods inherited by `self`
        fun collect_inherited_inits(view: ModelView): Set[MMethod] do
                var res = new HashSet[MMethod]
                for mproperty in collect_inherited_mmethods(view) do
@@ -397,7 +541,7 @@ redef class MClass
                return res
        end
 
-       # Collect all init mmethods accessible by 'self'  if accepted by `view`.
+       # Collect all init methods accessible by `self`
        #
        # This include introduced, redefined, inherited inits.
        fun collect_accessible_inits(view: ModelView): Set[MMethod] do
@@ -407,11 +551,64 @@ redef class MClass
                set.add_all(collect_inherited_inits(view))
                return set
        end
+
+       # Collect all virtual types accessible by `self`
+       #
+       # This include introduced, redefined, inherited virtual types.
+       fun collect_accessible_vts(view: ModelView): Set[MVirtualTypeProp] do
+               var set = new HashSet[MVirtualTypeProp]
+               for mproperty in collect_accessible_mproperties(view) do
+                       if mproperty isa MVirtualTypeProp then set.add mproperty
+               end
+               return set
+       end
 end
 
 redef class MClassDef
 
-       # Collect mpropdefs in 'self' with `visibility >= min_visibility`.
+       redef fun collect_linearization(mainmodule) do
+               var mclassdefs = new Array[MClassDef]
+               for mclassdef in in_hierarchy.as(not null).greaters do
+                       if mclassdef.mclass == self.mclass then mclassdefs.add mclassdef
+               end
+               mainmodule.linearize_mclassdefs(mclassdefs)
+               return mclassdefs
+       end
+
+       redef fun collect_ancestors(view) do
+               var res = new HashSet[MENTITY]
+               var hierarchy = self.in_hierarchy
+               if hierarchy == null then return res
+               for parent in hierarchy.greaters do
+                       if parent == self or not view.accept_mentity(parent) then continue
+                       res.add parent
+               end
+               return res
+       end
+
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               var hierarchy = self.in_hierarchy
+               if hierarchy == null then return res
+               for parent in hierarchy.direct_greaters do
+                       if parent == self or not view.accept_mentity(parent) then continue
+                       res.add parent
+               end
+               return res
+       end
+
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               var hierarchy = self.in_hierarchy
+               if hierarchy == null then return res
+               for child in hierarchy.direct_smallers do
+                       if child == self or not view.accept_mentity(child) then continue
+                       res.add child
+               end
+               return res
+       end
+
+       # Collect all property definitions in `self`
        fun collect_mpropdefs(view: ModelView): Set[MPropDef] do
                var res = new HashSet[MPropDef]
                for mpropdef in mpropdefs do
@@ -421,7 +618,7 @@ redef class MClassDef
                return res
        end
 
-       # Collect mpropdefs introduced in 'self' with `visibility >= min_visibility`.
+       # Collect all property definitions that are introduction in `self`
        fun collect_intro_mpropdefs(view: ModelView): Set[MPropDef] do
                var res = new HashSet[MPropDef]
                for mpropdef in mpropdefs do
@@ -432,7 +629,7 @@ redef class MClassDef
                return res
        end
 
-       # Collect mpropdefs redefined in 'self' with `visibility >= min_visibility`.
+       # Collect all property definitions that are redefinition in `self`
        fun collect_redef_mpropdefs(view: ModelView): Set[MPropDef] do
                var res = new HashSet[MPropDef]
                for mpropdef in mpropdefs do
@@ -457,9 +654,50 @@ end
 
 redef class MProperty
        redef fun collect_modifiers do return intro.collect_modifiers
+
+       redef fun collect_linearization(mainmodule) do
+               var mpropdefs = self.mpropdefs.to_a
+               mainmodule.linearize_mpropdefs(mpropdefs)
+               return mpropdefs
+       end
+
+       # Collect all property definitions of `self`
+       fun collect_mpropdefs(view: ModelView): Set[MPropDef] do
+               var res = new HashSet[MPropDef]
+               for mpropdef in mpropdefs do
+                       if not view.accept_mentity(mpropdef) then continue
+                       res.add mpropdef
+               end
+               return res
+       end
+
+       # Collect all direct super definitions of `self`
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               for mpropdef in mpropdefs do
+                       for parent in mpropdef.collect_parents(view) do
+                               if not view.accept_mentity(parent) then continue
+                               res.add parent.mproperty
+                       end
+               end
+               return res
+       end
+
+       # Collection all definitions that have `self` as a direct super definition
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               for mpropdef in mpropdefs do
+                       for child in mpropdef.collect_parents(view) do
+                               if not view.accept_mentity(child) then continue
+                               res.add child.mproperty
+                       end
+               end
+               return res
+       end
 end
 
 redef class MPropDef
+
        redef fun collect_modifiers do
                var res = super
                if not is_intro then
@@ -486,4 +724,36 @@ redef class MPropDef
                end
                return res
        end
+
+       redef fun collect_linearization(mainmodule) do
+               var mpropdefs = new Array[MPropDef]
+               var mentity = self
+               while not mentity.is_intro do
+                       mpropdefs.add mentity
+                       mentity = mentity.lookup_next_definition(mainmodule, mentity.mclassdef.bound_mtype)
+               end
+               mpropdefs.add mentity
+               mainmodule.linearize_mpropdefs(mpropdefs)
+               return mpropdefs
+       end
+
+       # Collect only the next definition of `self`
+       redef fun collect_parents(view) do
+               var res = new HashSet[MENTITY]
+               var mpropdef = self
+               while not mpropdef.is_intro do
+                       mpropdef = mpropdef.lookup_next_definition(mclassdef.mmodule, mclassdef.bound_mtype)
+                       res.add mpropdef
+               end
+               return res
+       end
+
+       # Collect all children definitions that directly depend on `self`
+       redef fun collect_children(view) do
+               var res = new HashSet[MENTITY]
+               for mpropdef in mproperty.collect_mpropdefs(view) do
+                       if mpropdef.collect_parents(view).has(self) then res.add mpropdef
+               end
+               return res
+       end
 end