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"""Work-in-progress Java code generator for a given schema salad definition."""
import os
from typing import MutableSequence
from six import string_types
from six.moves import cStringIO, urllib
from typing_extensions import Text # pylint: disable=unused-import
# move to a regular typing import when Python 3.3-3.6 is no longer supported
from . import schema
from .codegen_base import CodeGenBase, TypeDef
class JavaCodeGen(CodeGenBase):
def __init__(self, base):
# type: (Text) -> None
super(JavaCodeGen, self).__init__()
sp = urllib.parse.urlsplit(base)
self.package = ".".join(list(reversed(sp.netloc.split("."))) + sp.path.strip("/").split("/"))
self.outdir = self.package.replace(".", "/")
def prologue(self): # type: () -> None
if not os.path.exists(self.outdir):
os.makedirs(self.outdir)
@staticmethod
def safe_name(name): # type: (Text) -> Text
avn = schema.avro_name(name)
if avn in ("class", "extends", "abstract"):
# reserved words
avn = avn+"_"
return avn
def interface_name(self, n):
# type: (Text) -> Text
return self.safe_name(n)
def begin_class(self,
classname, # type: Text
extends, # type: MutableSequence[Text]
doc, # type: Text
abstract, # type: bool
field_names, # type: MutableSequence[Text]
idfield # type: Text
): # type: (...) -> None
cls = self.interface_name(classname)
self.current_class = cls
self.current_class_is_abstract = abstract
self.current_loader = cStringIO()
self.current_fields = cStringIO()
with open(os.path.join(self.outdir, "%s.java" % cls), "w") as f:
if extends:
ext = "extends " + ", ".join(self.interface_name(e) for e in extends)
else:
ext = ""
f.write("""package {package};
public interface {cls} {ext} {{
""".
format(package=self.package,
cls=cls,
ext=ext))
if self.current_class_is_abstract:
return
with open(os.path.join(self.outdir, "%sImpl.java" % cls), "w") as f:
f.write("""package {package};
public class {cls}Impl implements {cls} {{
""".
format(package=self.package,
cls=cls,
ext=ext))
self.current_loader.write("""
void Load() {
""")
def end_class(self, classname, field_names):
with open(os.path.join(self.outdir, "%s.java" % self.current_class), "a") as f:
f.write("""
}
""")
if self.current_class_is_abstract:
return
self.current_loader.write("""
}
""")
with open(os.path.join(self.outdir, "%sImpl.java" % self.current_class), "a") as f:
f.write(self.current_fields.getvalue())
f.write(self.current_loader.getvalue())
f.write("""
}
""")
prims = {
u"http://www.w3.org/2001/XMLSchema#string": TypeDef("String", "Support.StringLoader()"),
u"http://www.w3.org/2001/XMLSchema#int": TypeDef("Integer", "Support.IntLoader()"),
u"http://www.w3.org/2001/XMLSchema#long": TypeDef("Long", "Support.LongLoader()"),
u"http://www.w3.org/2001/XMLSchema#float": TypeDef("Float", "Support.FloatLoader()"),
u"http://www.w3.org/2001/XMLSchema#double": TypeDef("Double", "Support.DoubleLoader()"),
u"http://www.w3.org/2001/XMLSchema#boolean": TypeDef("Boolean", "Support.BoolLoader()"),
u"https://w3id.org/cwl/salad#null": TypeDef("null_type", "Support.NullLoader()"),
u"https://w3id.org/cwl/salad#Any": TypeDef("Any_type", "Support.AnyLoader()")
}
def type_loader(self, type_declaration):
if isinstance(type_declaration, MutableSequence) and len(type_declaration) == 2:
if type_declaration[0] == "https://w3id.org/cwl/salad#null":
type_declaration = type_declaration[1]
if isinstance(type_declaration, string_types):
if type_declaration in self.prims:
return self.prims[type_declaration]
return TypeDef("Object", "")
def declare_field(self, name, fieldtype, doc, optional):
fieldname = self.safe_name(name)
with open(os.path.join(self.outdir, "%s.java" % self.current_class), "a") as f:
f.write("""
{type} get{capfieldname}();
""".
format(fieldname=fieldname,
capfieldname=fieldname[0].upper() + fieldname[1:],
type=fieldtype.name))
if self.current_class_is_abstract:
return
self.current_fields.write("""
private {type} {fieldname};
public {type} get{capfieldname}() {{
return this.{fieldname};
}}
""".
format(fieldname=fieldname,
capfieldname=fieldname[0].upper() + fieldname[1:],
type=fieldtype.name))
self.current_loader.write("""
this.{fieldname} = null; // TODO: loaders
""".
format(fieldname=fieldname))
def declare_id_field(self, name, fieldtype, doc, optional):
pass
def uri_loader(self, inner, scoped_id, vocab_term, ref_scope):
return inner
def idmap_loader(self, field, inner, map_subject, map_predicate):
return inner
def typedsl_loader(self, inner, ref_scope):
return inner
def epilogue(self, root_loader):
pass
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