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qapi: New QAPISchemaVisitor

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The visitor will help keeping the code generation code simple and
reasonably separated from QAPISchema details.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1442401589-24189-5-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2015-09-16 13:06:07 +02:00
parent f51d8c3db1
commit 3f7dc21bee
1 changed files with 64 additions and 0 deletions
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64
scripts/qapi.py
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@ -772,6 +772,39 @@ class QAPISchemaEntity(object):
def check(self, schema):
pass
def visit(self, visitor):
pass
class QAPISchemaVisitor(object):
def visit_begin(self, schema):
pass
def visit_end(self):
pass
def visit_builtin_type(self, name, info, json_type):
pass
def visit_enum_type(self, name, info, values, prefix):
pass
def visit_array_type(self, name, info, element_type):
pass
def visit_object_type(self, name, info, base, members, variants):
pass
def visit_alternate_type(self, name, info, variants):
pass
def visit_command(self, name, info, arg_type, ret_type,
gen, success_response):
pass
def visit_event(self, name, info, arg_type):
pass
class QAPISchemaType(QAPISchemaEntity):
def c_type(self, is_param=False):
@ -818,6 +851,9 @@ class QAPISchemaBuiltinType(QAPISchemaType):
def json_type(self):
return self._json_type_name
def visit(self, visitor):
visitor.visit_builtin_type(self.name, self.info, self.json_type())
class QAPISchemaEnumType(QAPISchemaType):
def __init__(self, name, info, values, prefix):
@ -841,6 +877,10 @@ class QAPISchemaEnumType(QAPISchemaType):
def json_type(self):
return 'string'
def visit(self, visitor):
visitor.visit_enum_type(self.name, self.info,
self.values, self.prefix)
class QAPISchemaArrayType(QAPISchemaType):
def __init__(self, name, info, element_type):
@ -856,6 +896,9 @@ class QAPISchemaArrayType(QAPISchemaType):
def json_type(self):
return 'array'
def visit(self, visitor):
visitor.visit_array_type(self.name, self.info, self.element_type)
class QAPISchemaObjectType(QAPISchemaType):
def __init__(self, name, info, base, local_members, variants):
@ -904,6 +947,10 @@ class QAPISchemaObjectType(QAPISchemaType):
def json_type(self):
return 'object'
def visit(self, visitor):
visitor.visit_object_type(self.name, self.info,
self.base, self.local_members, self.variants)
class QAPISchemaObjectTypeMember(object):
def __init__(self, name, typ, optional):
@ -971,6 +1018,9 @@ class QAPISchemaAlternateType(QAPISchemaType):
def json_type(self):
return 'value'
def visit(self, visitor):
visitor.visit_alternate_type(self.name, self.info, self.variants)
class QAPISchemaCommand(QAPISchemaEntity):
def __init__(self, name, info, arg_type, ret_type, gen, success_response):
@ -993,6 +1043,11 @@ class QAPISchemaCommand(QAPISchemaEntity):
self.ret_type = schema.lookup_type(self._ret_type_name)
assert isinstance(self.ret_type, QAPISchemaType)
def visit(self, visitor):
visitor.visit_command(self.name, self.info,
self.arg_type, self.ret_type,
self.gen, self.success_response)
class QAPISchemaEvent(QAPISchemaEntity):
def __init__(self, name, info, arg_type):
@ -1007,6 +1062,9 @@ class QAPISchemaEvent(QAPISchemaEntity):
assert isinstance(self.arg_type, QAPISchemaObjectType)
assert not self.arg_type.variants # not implemented
def visit(self, visitor):
visitor.visit_event(self.name, self.info, self.arg_type)
class QAPISchema(object):
def __init__(self, fname):
@ -1204,6 +1262,12 @@ class QAPISchema(object):
for ent in self._entity_dict.values():
ent.check(self)
def visit(self, visitor):
visitor.visit_begin(self)
for name in sorted(self._entity_dict.keys()):
self._entity_dict[name].visit(visitor)
visitor.visit_end()
#
# Code generation helpers