[vala/wip/transform: 22/100] Deserialize hash tables

[Luca Bruno <lucabru src gnome org>]

commit d34f1b21b154648973e356e100c8bf6539eb7f80
Author: Luca Bruno <lucabru src gnome org>
Date:   Fri Dec 30 18:18:44 2011 +0100

    Deserialize hash tables

 codegen/valagvarianttransformer.vala   |   44 ++++++++++++++++++++++++++++++++
 vala/valaobjectcreationexpression.vala |   10 ++++---
 2 files changed, 50 insertions(+), 4 deletions(-)
---
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index 0961dd2..32377c1 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -344,6 +344,44 @@ public class Vala.GVariantTransformer : CodeTransformer {
                return expression (result);
        }
 
+       Expression deserialize_hash_table (DataType type, Expression expr) {
+               var variant = b.add_temp_declaration (data_type ("GLib.Variant", true), null);
+               var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter", true), null);
+               b.add_assignment (expression (variant), expr);
+               b.add_assignment (expression (iterator), expression (@"$variant.iterator ()"));
+
+               var type_args = type.get_type_arguments ();
+               assert (type_args.size == 2);
+               var key_type = type_args.get (0);
+               var value_type = type_args.get (1);
+
+               var hash_table_new = new ObjectCreationExpression (null, b.source_reference);
+               hash_table_new.type_reference = type.copy ();
+               if (key_type.data_type == context.analyzer.string_type.data_type) {
+                       hash_table_new.add_argument (expression ("GLib.str_hash"));
+                       hash_table_new.add_argument (expression ("GLib.str_equal"));
+               } else {
+                       hash_table_new.add_argument (expression ("GLib.direct_hash"));
+                       hash_table_new.add_argument (expression ("GLib.direct_equal"));
+               }
+
+               var hash_table = b.add_temp_declaration (copy_type (type, true), hash_table_new);
+               var new_variant = b.add_temp_declaration (data_type ("GLib.Variant", true), null);
+
+               b.open_while (expression (@"($new_variant = $iterator.next_value ()) != null"));
+
+               Expression key = deserialize_expression (key_type, expression (@"$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);
+
+               b.close ();
+
+               return expression (hash_table);
+       }
+
        Expression? deserialize_expression (DataType type, Expression expr) {
                BasicTypeInfo basic_type;
                Expression result = null;
@@ -353,6 +391,12 @@ public class Vala.GVariantTransformer : CodeTransformer {
                        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);
+                       }
                }
                return result;
        }
diff --git a/vala/valaobjectcreationexpression.vala b/vala/valaobjectcreationexpression.vala
index ccc2b53..2689fef 100644
--- a/vala/valaobjectcreationexpression.vala
+++ b/vala/valaobjectcreationexpression.vala
@@ -41,11 +41,13 @@ public class Vala.ObjectCreationExpression : Expression {
         * The construction method to use or the data type to be created
         * with the default construction method.
         */
-       public MemberAccess member_name {
+       public MemberAccess? member_name {
                get { return _member_name; }
                set {
                        _member_name = value;
-                       _member_name.parent_node = this;
+                       if (_member_name != null) {
+                               _member_name.parent_node = this;
+                       }
                }
        }
 
@@ -58,7 +60,7 @@ public class Vala.ObjectCreationExpression : Expression {
        private List<MemberInitializer> object_initializer = new ArrayList<MemberInitializer> ();
 
        private DataType _data_type;
-       private MemberAccess _member_name;
+       private MemberAccess? _member_name;
 
        /**
         * Creates a new object creation expression.
@@ -67,7 +69,7 @@ public class Vala.ObjectCreationExpression : Expression {
         * @param source_reference reference to source code
         * @return                 newly created object creation expression
         */
-       public ObjectCreationExpression (MemberAccess member_name, SourceReference source_reference) {
+       public ObjectCreationExpression (MemberAccess? member_name, SourceReference? source_reference = null) 
{
                this.source_reference = source_reference;
                this.member_name = member_name;
        }