[vala/wip/transform: 41/107] Use wrapper methods for deserializing gvariants

[Rico Tzschichholz <ricotz src gnome org>]

commit c62004efb030a0c2f7bbda0d838071cf1a3aa9ed
Author: Luca Bruno <lucabru src gnome org>
Date:   Tue Jan 3 13:51:57 2012 +0100

    Use wrapper methods for deserializing gvariants

 codegen/valagvarianttransformer.vala |  187 ++++++++++++++++++----------------
 1 files changed, 100 insertions(+), 87 deletions(-)
---
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index b9cf596..170595f 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -274,28 +274,36 @@ public class Vala.GVariantTransformer : CodeTransformer {
        }
 
        Expression deserialize_array (ArrayType array_type, Expression expr) {
-               var variant = b.add_temp_declaration (data_type ("GLib.Variant"));
-               var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"));
-               b.add_assignment (expression (variant), expr);
-               b.add_assignment (expression (iterator), expression (@"$variant.iterator ()"));
-
-               var array_new = new ArrayCreationExpression (array_type.element_type, array_type.rank, null, 
b.source_reference);
-               var array = b.add_temp_declaration (copy_type (array_type, true));
-
-               string[] indices = new string[array_type.rank];
-               for (int dim=1; dim <= array_type.rank; dim++) {
-                       string length = b.add_temp_declaration (data_type ("size_t"));
-                       b.add_assignment (expression (length), expression (@"$iterator.n_children ()"));
-                       array_new.append_size (expression (length));
-                       indices[dim-1] = b.add_temp_declaration (null, expression ("0"));
-                       if (dim < array_type.rank) {
-                               b.add_expression (expression (@"$iterator.next_value ()"));
+               Method m;
+               if (!wrapper_method (copy_type (array_type, true), "gvariant_deserialize_array 
"+array_type.to_string(), out m)) {
+                       m.add_parameter (new Parameter ("variant", data_type ("GLib.Variant", false), 
b.source_reference));
+                       b.push_method (m);
+
+                       var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"), expression 
("variant.iterator ()"));
+
+                       var array_new = new ArrayCreationExpression (array_type.element_type, 
array_type.rank, null, b.source_reference);
+                       var array = b.add_temp_declaration (copy_type (array_type, true));
+
+                       string[] indices = new string[array_type.rank];
+                       for (int dim=1; dim <= array_type.rank; dim++) {
+                               string length = b.add_temp_declaration (data_type ("size_t"));
+                               b.add_assignment (expression (length), expression (@"$iterator.n_children 
()"));
+                               array_new.append_size (expression (length));
+                               indices[dim-1] = b.add_temp_declaration (null, expression ("0"));
+                               if (dim < array_type.rank) {
+                                       b.add_expression (expression (@"$iterator.next_value ()"));
+                               }
                        }
-               }
-               b.add_assignment (expression (array), array_new);
+                       b.add_assignment (expression (array), array_new);
+                       deserialize_array_dim (array_type, "variant", indices, 1, array);
+                       b.add_return (expression (array));
 
-               deserialize_array_dim (array_type, variant, indices, 1, array);
-               return expression (array);
+                       b.pop_method ();
+                       check (m);
+               }
+               var call = (MethodCall) expression (m.name+"()");
+               call.add_argument (expr);
+               return call;
        }
 
        void deserialize_array_dim (ArrayType array_type, string variant, string[] indices, int dim, string 
array) {
@@ -309,7 +317,7 @@ public class Vala.GVariantTransformer : CodeTransformer {
                        for (int i=0; i < array_type.rank; i++) {
                                element_access.append_index (expression (indices[i]));
                        }
-                       b.add_assignment (element_access, deserialize_expression (array_type.element_type, 
expression (new_variant)));
+                       b.add_assignment (element_access, expression (@"($(array_type.element_type)) 
($new_variant)"));
                } else {
                        deserialize_array_dim (array_type, new_variant, indices, dim + 1, array);
                }
@@ -318,88 +326,78 @@ public class Vala.GVariantTransformer : CodeTransformer {
        }
 
        Expression? deserialize_struct (Struct st, Expression expr) {
-               var variant = b.add_temp_declaration (data_type ("GLib.Variant"));
-               var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"));
-               b.add_assignment (expression (variant), expr);
-               b.add_assignment (expression (iterator), expression (@"$variant.iterator ()"));
+               bool has_instance_field = false;
+               foreach (var f in st.get_fields ()) {
+                       if (f.binding == MemberBinding.INSTANCE) {
+                               has_instance_field = true;
+                               break;
+                       }
+               }
+               if (!has_instance_field) {
+                       return null;
+               }
+
+               Method m;
                var type = context.analyzer.get_data_type_for_symbol (st);
                type.value_owned = true;
-               var result = b.add_temp_declaration (type, expression ("{}"));
+               if (!wrapper_method (type, "gvariant_deserialize_struct "+type.to_string(), out m)) {
+                       m.add_parameter (new Parameter ("variant", data_type ("GLib.Variant", false), 
b.source_reference));
+                       b.push_method (m);
 
-               bool field_found = false;
+                       var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"), expression 
(@"variant.iterator ()"));
 
-               foreach (var f in st.get_fields ()) {
-                       if (f.binding != MemberBinding.INSTANCE) {
-                               continue;
-                       }
-
-                       field_found = true;
+                       var result = b.add_temp_declaration (type, expression ("{}"));
 
-                       b.add_assignment (expression (@"$result.$(f.name)"), deserialize_expression 
(f.variable_type, expression (@"$iterator.next_value ()")));
-               }
+                       foreach (var f in st.get_fields ()) {
+                               if (f.binding != MemberBinding.INSTANCE) {
+                                       continue;
+                               }
 
-               if (!field_found) {
-                       return null;
+                               b.add_assignment (expression (@"$result.$(f.name)"), expression 
(@"($(f.variable_type)) ($iterator.next_value ())"));
+                       }
+                       b.add_return (expression (result));
+                       b.pop_method ();
+                       check (m);
                }
-
-               return expression (result);
+               var call = (MethodCall) expression (m.name+"()");
+               call.add_argument (expr);
+               return call;
        }
 
        Expression deserialize_hash_table (DataType type, Expression expr) {
-               var variant = b.add_temp_declaration (data_type ("GLib.Variant"));
-               var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"));
-               b.add_assignment (expression (variant), expr);
-               b.add_assignment (expression (iterator), expression (@"$variant.iterator ()"));
-
-               var type_args = type.get_type_arguments ();
-               assert (type_args.size == 2);
-               var key_type = type_args.get (0);
-               var value_type = type_args.get (1);
-
-               var hash_table_new = new ObjectCreationExpression (null, b.source_reference);
-               hash_table_new.type_reference = type.copy ();
-               if (key_type.data_type == context.analyzer.string_type.data_type) {
-                       hash_table_new.add_argument (expression ("GLib.str_hash"));
-                       hash_table_new.add_argument (expression ("GLib.str_equal"));
-               } else {
-                       hash_table_new.add_argument (expression ("GLib.direct_hash"));
-                       hash_table_new.add_argument (expression ("GLib.direct_equal"));
-               }
+               Method m;
+               if (!wrapper_method (copy_type (type, true), "gvariant_deserialize_hash_table 
"+type.to_string(), out m)) {
+                       m.add_parameter (new Parameter ("variant", data_type ("GLib.Variant", false), 
b.source_reference));
+                       b.push_method (m);
 
-               var hash_table = b.add_temp_declaration (copy_type (type, true), hash_table_new);
-               var new_variant = b.add_temp_declaration (data_type ("GLib.Variant"));
+                       var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter"), expression 
(@"variant.iterator ()"));
 
-               b.open_while (expression (@"($new_variant = $iterator.next_value ()) != null"));
+                       var type_args = type.get_type_arguments ();
+                       assert (type_args.size == 2);
+                       var key_type = type_args.get (0);
+                       var value_type = type_args.get (1);
 
-               Expression key = deserialize_expression (key_type, expression (@"$new_variant.get_child_value 
(0)"));
-               Expression value = deserialize_expression (value_type, expression 
(@"$new_variant.get_child_value (1)"));
-               var insert = (MethodCall) expression (@"$hash_table.insert ()");
-               insert.add_argument (key);
-               insert.add_argument (value);
-               b.add_expression (insert);
+                       Expression hash_table_new;
+                       if (key_type.data_type == context.analyzer.string_type.data_type) {
+                               hash_table_new = expression (@"new $type (GLib.str_hash, GLib.str_equal)");
+                       } else {
+                               hash_table_new = expression (@"new $type (GLib.direct_hash, 
GLib.direct_equal)");
+                       }
 
-               b.close ();
+                       var hash_table = b.add_temp_declaration (copy_type (type, true), hash_table_new);
+                       var new_variant = b.add_temp_declaration (data_type ("GLib.Variant"));
 
-               return expression (hash_table);
-       }
+                       b.open_while (expression (@"($new_variant = $iterator.next_value ()) != null"));
+                       b.add_expression (expression (@"$hash_table.insert 
(($key_type)($new_variant.get_child_value (0)), ($(value_type))($new_variant.get_child_value (1)))"));
+                       b.close ();
 
-       Expression? deserialize_expression (DataType type, Expression expr) {
-               BasicTypeInfo basic_type;
-               Expression result = null;
-               if (get_basic_type_info (get_type_signature (type), out basic_type)) {
-                       result = deserialize_basic (basic_type, expr);
-               } else if (type is ArrayType) {
-                       result = deserialize_array ((ArrayType) type, expr);
-               } else if (type.data_type is Struct) {
-                       result = deserialize_struct ((Struct) type.data_type, expr);
-               } else if (type is ObjectType) {
-                       if (type.data_type == context.analyzer.gvariant_type.data_type) {
-                               result = new MethodCall (new MemberAccess (expr, "get_variant"), 
b.source_reference);
-                       } else if (type.data_type.get_full_name () == "GLib.HashTable") {
-                               result = deserialize_hash_table ((ObjectType) type, expr);
-                       }
+                       b.add_return (expression (hash_table));
+                       b.pop_method ();
+                       check (m);
                }
-               return result;
+               var call = (MethodCall) expression (m.name+"()");
+               call.add_argument (expr);
+               return call;
        }
 
        public override void visit_cast_expression (CastExpression expr) {
@@ -412,8 +410,23 @@ public class Vala.GVariantTransformer : CodeTransformer {
                b = new CodeBuilder (context, expr.parent_statement, expr.source_reference);
                var old_parent_node = expr.parent_node;
                var target_type = expr.target_type.copy ();
+               var type = expr.value_type;
 
-               Expression result = deserialize_expression (expr.type_reference, expr.inner);
+               BasicTypeInfo basic_type;
+               Expression result = null;
+               if (get_basic_type_info (get_type_signature (type), out basic_type)) {
+                       result = deserialize_basic (basic_type, expr.inner);
+               } else if (type is ArrayType) {
+                       result = deserialize_array ((ArrayType) type, expr.inner);
+               } else if (type.data_type is Struct) {
+                       result = deserialize_struct ((Struct) type.data_type, expr.inner);
+               } else if (type is ObjectType) {
+                       if (type.data_type == context.analyzer.gvariant_type.data_type) {
+                               result = new MethodCall (new MemberAccess (expr.inner, "get_variant"), 
b.source_reference);
+                       } else if (type.data_type.get_full_name () == "GLib.HashTable") {
+                               result = deserialize_hash_table ((ObjectType) type, expr.inner);
+                       }
+               }
 
                result.target_type = target_type;
                context.analyzer.replaced_nodes.add (expr);