diff options
author | max42 <max42@yandex-team.com> | 2023-06-30 11:13:34 +0300 |
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committer | max42 <max42@yandex-team.com> | 2023-06-30 11:13:34 +0300 |
commit | 3e1899838408bbad47622007aa382bc8a2b01f87 (patch) | |
tree | 0f21c1e6add187ddb6c3ccc048a7d640ce03fb87 /contrib/libs/flatbuffers/src/idl_gen_java.cpp | |
parent | 5463eb3f5e72a86f858a3d27c886470a724ede34 (diff) | |
download | ydb-3e1899838408bbad47622007aa382bc8a2b01f87.tar.gz |
Revert "YT-19324: move YT provider to ydb/library/yql"
This reverts commit ca272f12fdd0e8d5c3e957fc87939148f1caaf72, reversing
changes made to 49f8acfc8b0b5c0071b804423bcf53fda26c7c12.
Diffstat (limited to 'contrib/libs/flatbuffers/src/idl_gen_java.cpp')
-rw-r--r-- | contrib/libs/flatbuffers/src/idl_gen_java.cpp | 1244 |
1 files changed, 0 insertions, 1244 deletions
diff --git a/contrib/libs/flatbuffers/src/idl_gen_java.cpp b/contrib/libs/flatbuffers/src/idl_gen_java.cpp deleted file mode 100644 index cfd3a55cdb8..00000000000 --- a/contrib/libs/flatbuffers/src/idl_gen_java.cpp +++ /dev/null @@ -1,1244 +0,0 @@ -/* - * Copyright 2014 Google Inc. All rights reserved. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -// independent from idl_parser, since this code is not needed for most clients - -#include "flatbuffers/code_generators.h" -#include "flatbuffers/flatbuffers.h" -#include "flatbuffers/idl.h" -#include "flatbuffers/util.h" - -#if defined(FLATBUFFERS_CPP98_STL) -# include <cctype> -#endif // defined(FLATBUFFERS_CPP98_STL) - -namespace flatbuffers { -namespace java { - -static TypedFloatConstantGenerator JavaFloatGen("Double.", "Float.", "NaN", - "POSITIVE_INFINITY", - "NEGATIVE_INFINITY"); - -static CommentConfig comment_config = { - "/**", - " *", - " */", -}; - -class JavaGenerator : public BaseGenerator { - public: - JavaGenerator(const Parser &parser, const std::string &path, - const std::string &file_name) - : BaseGenerator(parser, path, file_name, "", ".", "java"), - cur_name_space_(nullptr) {} - - JavaGenerator &operator=(const JavaGenerator &); - bool generate() { - std::string one_file_code; - cur_name_space_ = parser_.current_namespace_; - - for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end(); - ++it) { - std::string enumcode; - auto &enum_def = **it; - if (!parser_.opts.one_file) cur_name_space_ = enum_def.defined_namespace; - GenEnum(enum_def, &enumcode); - if (parser_.opts.one_file) { - one_file_code += enumcode; - } else { - if (!SaveType(enum_def.name, *enum_def.defined_namespace, enumcode, - /* needs_includes= */ false)) - return false; - } - } - - for (auto it = parser_.structs_.vec.begin(); - it != parser_.structs_.vec.end(); ++it) { - std::string declcode; - auto &struct_def = **it; - if (!parser_.opts.one_file) - cur_name_space_ = struct_def.defined_namespace; - GenStruct(struct_def, &declcode); - if (parser_.opts.one_file) { - one_file_code += declcode; - } else { - if (!SaveType(struct_def.name, *struct_def.defined_namespace, declcode, - /* needs_includes= */ true)) - return false; - } - } - - if (parser_.opts.one_file) { - return SaveType(file_name_, *parser_.current_namespace_, one_file_code, - /* needs_includes= */ true); - } - return true; - } - - // Save out the generated code for a single class while adding - // declaration boilerplate. - bool SaveType(const std::string &defname, const Namespace &ns, - const std::string &classcode, bool needs_includes) const { - if (!classcode.length()) return true; - - std::string code; - code = "// " + std::string(FlatBuffersGeneratedWarning()) + "\n\n"; - - std::string namespace_name = FullNamespace(".", ns); - if (!namespace_name.empty()) { - code += "package " + namespace_name + ";"; - code += "\n\n"; - } - if (needs_includes) { - code += - "import java.nio.*;\nimport java.lang.*;\nimport " - "java.util.*;\nimport com.google.flatbuffers.*;\n"; - if (parser_.opts.gen_nullable) { - code += "\nimport javax.annotation.Nullable;\n"; - } - if (parser_.opts.java_checkerframework) { - code += "\nimport org.checkerframework.dataflow.qual.Pure;\n"; - } - code += "\n"; - } - - code += classcode; - if (!namespace_name.empty()) code += ""; - auto filename = NamespaceDir(ns) + defname + ".java"; - return SaveFile(filename.c_str(), code, false); - } - - const Namespace *CurrentNameSpace() const { return cur_name_space_; } - - std::string GenNullableAnnotation(const Type &t) const { - return parser_.opts.gen_nullable && - !IsScalar(DestinationType(t, true).base_type) && - t.base_type != BASE_TYPE_VECTOR - ? " @Nullable " - : ""; - } - - std::string GenPureAnnotation(const Type &t) const { - return parser_.opts.java_checkerframework && - !IsScalar(DestinationType(t, true).base_type) - ? " @Pure " - : ""; - } - - std::string GenTypeBasic(const Type &type) const { - // clang-format off - static const char * const java_typename[] = { - #define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, ...) \ - #JTYPE, - FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD) - #undef FLATBUFFERS_TD - }; - // clang-format on - return java_typename[type.base_type]; - } - - std::string GenTypePointer(const Type &type) const { - switch (type.base_type) { - case BASE_TYPE_STRING: return "String"; - case BASE_TYPE_VECTOR: return GenTypeGet(type.VectorType()); - case BASE_TYPE_STRUCT: return WrapInNameSpace(*type.struct_def); - case BASE_TYPE_UNION: FLATBUFFERS_FALLTHROUGH(); // else fall thru - default: return "Table"; - } - } - - std::string GenTypeGet(const Type &type) const { - return IsScalar(type.base_type) - ? GenTypeBasic(type) - : (IsArray(type) ? GenTypeGet(type.VectorType()) - : GenTypePointer(type)); - } - - // Find the destination type the user wants to receive the value in (e.g. - // one size higher signed types for unsigned serialized values in Java). - Type DestinationType(const Type &type, bool vectorelem) const { - switch (type.base_type) { - // We use int for both uchar/ushort, since that generally means less - // casting than using short for uchar. - case BASE_TYPE_UCHAR: return Type(BASE_TYPE_INT); - case BASE_TYPE_USHORT: return Type(BASE_TYPE_INT); - case BASE_TYPE_UINT: return Type(BASE_TYPE_LONG); - case BASE_TYPE_ARRAY: - case BASE_TYPE_VECTOR: - if (vectorelem) return DestinationType(type.VectorType(), vectorelem); - FLATBUFFERS_FALLTHROUGH(); // else fall thru - default: return type; - } - } - - std::string GenOffsetType() const { return "int"; } - - std::string GenOffsetConstruct(const std::string &variable_name) const { - return variable_name; - } - - std::string GenVectorOffsetType() const { return "int"; } - - // Generate destination type name - std::string GenTypeNameDest(const Type &type) const { - return GenTypeGet(DestinationType(type, true)); - } - - // Mask to turn serialized value into destination type value. - std::string DestinationMask(const Type &type, bool vectorelem) const { - switch (type.base_type) { - case BASE_TYPE_UCHAR: return " & 0xFF"; - case BASE_TYPE_USHORT: return " & 0xFFFF"; - case BASE_TYPE_UINT: return " & 0xFFFFFFFFL"; - case BASE_TYPE_VECTOR: - if (vectorelem) return DestinationMask(type.VectorType(), vectorelem); - FLATBUFFERS_FALLTHROUGH(); // else fall thru - default: return ""; - } - } - - // Casts necessary to correctly read serialized data - std::string DestinationCast(const Type &type) const { - if (IsSeries(type)) { - return DestinationCast(type.VectorType()); - } else { - // Cast necessary to correctly read serialized unsigned values. - if (type.base_type == BASE_TYPE_UINT) return "(long)"; - } - return ""; - } - - // Cast statements for mutator method parameters. - // In Java, parameters representing unsigned numbers need to be cast down to - // their respective type. For example, a long holding an unsigned int value - // would be cast down to int before being put onto the buffer. - std::string SourceCast(const Type &type, bool castFromDest) const { - if (IsSeries(type)) { - return SourceCast(type.VectorType(), castFromDest); - } else { - if (castFromDest) { - if (type.base_type == BASE_TYPE_UINT) - return "(int)"; - else if (type.base_type == BASE_TYPE_USHORT) - return "(short)"; - else if (type.base_type == BASE_TYPE_UCHAR) - return "(byte)"; - } - } - return ""; - } - - std::string SourceCast(const Type &type) const { - return SourceCast(type, true); - } - - std::string SourceCastBasic(const Type &type, bool castFromDest) const { - return IsScalar(type.base_type) ? SourceCast(type, castFromDest) : ""; - } - - std::string SourceCastBasic(const Type &type) const { - return SourceCastBasic(type, true); - } - - std::string GenEnumDefaultValue(const FieldDef &field) const { - auto &value = field.value; - FLATBUFFERS_ASSERT(value.type.enum_def); - auto &enum_def = *value.type.enum_def; - auto enum_val = enum_def.FindByValue(value.constant); - return enum_val ? (WrapInNameSpace(enum_def) + "." + enum_val->name) - : value.constant; - } - - std::string GenDefaultValue(const FieldDef &field) const { - auto &value = field.value; - auto constant = field.IsScalarOptional() ? "0" : value.constant; - auto longSuffix = "L"; - switch (value.type.base_type) { - case BASE_TYPE_BOOL: return constant == "0" ? "false" : "true"; - case BASE_TYPE_ULONG: { - // Converts the ulong into its bits signed equivalent - uint64_t defaultValue = StringToUInt(constant.c_str()); - return NumToString(static_cast<int64_t>(defaultValue)) + longSuffix; - } - case BASE_TYPE_UINT: - case BASE_TYPE_LONG: return constant + longSuffix; - default: - if (IsFloat(value.type.base_type)) { - if (field.IsScalarOptional()) { - return value.type.base_type == BASE_TYPE_DOUBLE ? "0.0" : "0f"; - } - return JavaFloatGen.GenFloatConstant(field); - } else { - return constant; - } - } - } - - std::string GenDefaultValueBasic(const FieldDef &field) const { - auto &value = field.value; - if (!IsScalar(value.type.base_type)) { return "0"; } - return GenDefaultValue(field); - } - - void GenEnum(EnumDef &enum_def, std::string *code_ptr) const { - std::string &code = *code_ptr; - if (enum_def.generated) return; - - // Generate enum definitions of the form: - // public static (final) int name = value; - // In Java, we use ints rather than the Enum feature, because we want them - // to map directly to how they're used in C/C++ and file formats. - // That, and Java Enums are expensive, and not universally liked. - GenComment(enum_def.doc_comment, code_ptr, &comment_config); - - if (enum_def.attributes.Lookup("private")) { - // For Java, we leave the enum unmarked to indicate package-private - } else { - code += "public "; - } - code += "final class " + enum_def.name; - code += " {\n"; - code += " private " + enum_def.name + "() { }\n"; - for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) { - auto &ev = **it; - GenComment(ev.doc_comment, code_ptr, &comment_config, " "); - code += " public static final "; - code += GenTypeBasic(DestinationType(enum_def.underlying_type, false)); - code += " "; - code += ev.name + " = "; - code += enum_def.ToString(ev); - code += ";\n"; - } - - // Generate a generate string table for enum values. - // Problem is, if values are very sparse that could generate really big - // tables. Ideally in that case we generate a map lookup instead, but for - // the moment we simply don't output a table at all. - auto range = enum_def.Distance(); - // Average distance between values above which we consider a table - // "too sparse". Change at will. - static const uint64_t kMaxSparseness = 5; - if (range / static_cast<uint64_t>(enum_def.size()) < kMaxSparseness) { - code += "\n public static final String"; - code += "[] names = { "; - auto val = enum_def.Vals().front(); - for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); - ++it) { - auto ev = *it; - for (auto k = enum_def.Distance(val, ev); k > 1; --k) code += "\"\", "; - val = ev; - code += "\"" + (*it)->name + "\", "; - } - code += "};\n\n"; - code += " public static "; - code += "String"; - code += " " + MakeCamel("name", false); - code += "(int e) { return names[e"; - if (enum_def.MinValue()->IsNonZero()) - code += " - " + enum_def.MinValue()->name; - code += "]; }\n"; - } - - // Close the class - code += "}\n\n"; - } - - // Returns the function name that is able to read a value of the given type. - std::string GenGetter(const Type &type) const { - switch (type.base_type) { - case BASE_TYPE_STRING: return "__string"; - case BASE_TYPE_STRUCT: return "__struct"; - case BASE_TYPE_UNION: return "__union"; - case BASE_TYPE_VECTOR: return GenGetter(type.VectorType()); - case BASE_TYPE_ARRAY: return GenGetter(type.VectorType()); - default: { - std::string getter = "bb.get"; - if (type.base_type == BASE_TYPE_BOOL) { - getter = "0!=" + getter; - } else if (GenTypeBasic(type) != "byte") { - getter += MakeCamel(GenTypeBasic(type)); - } - return getter; - } - } - } - - // Returns the function name that is able to read a value of the given type. - std::string GenGetterForLookupByKey(flatbuffers::FieldDef *key_field, - const std::string &data_buffer, - const char *num = nullptr) const { - auto type = key_field->value.type; - auto dest_mask = DestinationMask(type, true); - auto dest_cast = DestinationCast(type); - auto getter = data_buffer + ".get"; - if (GenTypeBasic(type) != "byte") { - getter += MakeCamel(GenTypeBasic(type)); - } - getter = dest_cast + getter + "(" + GenOffsetGetter(key_field, num) + ")" + - dest_mask; - return getter; - } - - // Direct mutation is only allowed for scalar fields. - // Hence a setter method will only be generated for such fields. - std::string GenSetter(const Type &type) const { - if (IsScalar(type.base_type)) { - std::string setter = "bb.put"; - if (GenTypeBasic(type) != "byte" && type.base_type != BASE_TYPE_BOOL) { - setter += MakeCamel(GenTypeBasic(type)); - } - return setter; - } else { - return ""; - } - } - - // Returns the method name for use with add/put calls. - std::string GenMethod(const Type &type) const { - return IsScalar(type.base_type) ? MakeCamel(GenTypeBasic(type)) - : (IsStruct(type) ? "Struct" : "Offset"); - } - - // Recursively generate arguments for a constructor, to deal with nested - // structs. - void GenStructArgs(const StructDef &struct_def, std::string *code_ptr, - const char *nameprefix, size_t array_count = 0) const { - std::string &code = *code_ptr; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - const auto &field_type = field.value.type; - const auto array_field = IsArray(field_type); - const auto &type = array_field ? field_type.VectorType() - : DestinationType(field_type, false); - const auto array_cnt = array_field ? (array_count + 1) : array_count; - if (IsStruct(type)) { - // Generate arguments for a struct inside a struct. To ensure names - // don't clash, and to make it obvious these arguments are constructing - // a nested struct, prefix the name with the field name. - GenStructArgs(*field_type.struct_def, code_ptr, - (nameprefix + (field.name + "_")).c_str(), array_cnt); - } else { - code += ", "; - code += GenTypeBasic(type); - for (size_t i = 0; i < array_cnt; i++) code += "[]"; - code += " "; - code += nameprefix; - code += MakeCamel(field.name, false); - } - } - } - - // Recusively generate struct construction statements of the form: - // builder.putType(name); - // and insert manual padding. - void GenStructBody(const StructDef &struct_def, std::string *code_ptr, - const char *nameprefix, size_t index = 0, - bool in_array = false) const { - std::string &code = *code_ptr; - std::string indent((index + 1) * 2, ' '); - code += indent + " builder.prep("; - code += NumToString(struct_def.minalign) + ", "; - code += NumToString(struct_def.bytesize) + ");\n"; - for (auto it = struct_def.fields.vec.rbegin(); - it != struct_def.fields.vec.rend(); ++it) { - auto &field = **it; - const auto &field_type = field.value.type; - if (field.padding) { - code += indent + " builder.pad("; - code += NumToString(field.padding) + ");\n"; - } - if (IsStruct(field_type)) { - GenStructBody(*field_type.struct_def, code_ptr, - (nameprefix + (field.name + "_")).c_str(), index, - in_array); - } else { - const auto &type = - IsArray(field_type) ? field_type.VectorType() : field_type; - const auto index_var = "_idx" + NumToString(index); - if (IsArray(field_type)) { - code += indent + " for (int " + index_var + " = "; - code += NumToString(field_type.fixed_length); - code += "; " + index_var + " > 0; " + index_var + "--) {\n"; - in_array = true; - } - if (IsStruct(type)) { - GenStructBody(*field_type.struct_def, code_ptr, - (nameprefix + (field.name + "_")).c_str(), index + 1, - in_array); - } else { - code += IsArray(field_type) ? " " : ""; - code += indent + " builder.put"; - code += GenMethod(type) + "("; - code += SourceCast(type); - auto argname = nameprefix + MakeCamel(field.name, false); - code += argname; - size_t array_cnt = index + (IsArray(field_type) ? 1 : 0); - for (size_t i = 0; in_array && i < array_cnt; i++) { - code += "[_idx" + NumToString(i) + "-1]"; - } - code += ");\n"; - } - if (IsArray(field_type)) { code += indent + " }\n"; } - } - } - } - - std::string GenByteBufferLength(const char *bb_name) const { - std::string bb_len = bb_name; - bb_len += ".capacity()"; - return bb_len; - } - - std::string GenOffsetGetter(flatbuffers::FieldDef *key_field, - const char *num = nullptr) const { - std::string key_offset = ""; - key_offset += "__offset(" + NumToString(key_field->value.offset) + ", "; - if (num) { - key_offset += num; - key_offset += ", _bb)"; - } else { - key_offset += GenByteBufferLength("bb"); - key_offset += " - tableOffset, bb)"; - } - return key_offset; - } - - std::string GenLookupKeyGetter(flatbuffers::FieldDef *key_field) const { - std::string key_getter = " "; - key_getter += "int tableOffset = "; - key_getter += "__indirect(vectorLocation + 4 * (start + middle)"; - key_getter += ", bb);\n "; - if (IsString(key_field->value.type)) { - key_getter += "int comp = "; - key_getter += "compareStrings("; - key_getter += GenOffsetGetter(key_field); - key_getter += ", byteKey, bb);\n"; - } else { - auto get_val = GenGetterForLookupByKey(key_field, "bb"); - key_getter += GenTypeNameDest(key_field->value.type) + " val = "; - key_getter += get_val + ";\n"; - key_getter += " int comp = val > key ? 1 : val < key ? -1 : 0;\n"; - } - return key_getter; - } - - std::string GenKeyGetter(flatbuffers::FieldDef *key_field) const { - std::string key_getter = ""; - auto data_buffer = "_bb"; - if (IsString(key_field->value.type)) { - key_getter += " return "; - key_getter += ""; - key_getter += "compareStrings("; - key_getter += GenOffsetGetter(key_field, "o1") + ", "; - key_getter += GenOffsetGetter(key_field, "o2") + ", " + data_buffer + ")"; - key_getter += ";"; - } else { - auto field_getter = GenGetterForLookupByKey(key_field, data_buffer, "o1"); - key_getter += - "\n " + GenTypeNameDest(key_field->value.type) + " val_1 = "; - key_getter += - field_getter + ";\n " + GenTypeNameDest(key_field->value.type); - key_getter += " val_2 = "; - field_getter = GenGetterForLookupByKey(key_field, data_buffer, "o2"); - key_getter += field_getter + ";\n"; - key_getter += " return val_1 > val_2 ? 1 : val_1 < val_2 ? -1 : 0;\n "; - } - return key_getter; - } - - void GenStruct(StructDef &struct_def, std::string *code_ptr) const { - if (struct_def.generated) return; - std::string &code = *code_ptr; - - // Generate a struct accessor class, with methods of the form: - // public type name() { return bb.getType(i + offset); } - // or for tables of the form: - // public type name() { - // int o = __offset(offset); return o != 0 ? bb.getType(o + i) : default; - // } - GenComment(struct_def.doc_comment, code_ptr, &comment_config); - - if (parser_.opts.gen_generated) { - code += "@javax.annotation.Generated(value=\"flatc\")\n"; - } - code += "@SuppressWarnings(\"unused\")\n"; - if (struct_def.attributes.Lookup("private")) { - // For Java, we leave the struct unmarked to indicate package-private - } else { - code += "public "; - } - code += "final class " + struct_def.name; - code += " extends "; - code += struct_def.fixed ? "Struct" : "Table"; - code += " {\n"; - - if (!struct_def.fixed) { - // Generate verson check method. - // Force compile time error if not using the same version runtime. - code += " public static void ValidateVersion() {"; - code += " Constants."; - code += "FLATBUFFERS_2_0_0(); "; - code += "}\n"; - - // Generate a special accessor for the table that when used as the root - // of a FlatBuffer - std::string method_name = "getRootAs" + struct_def.name; - std::string method_signature = - " public static " + struct_def.name + " " + method_name; - - // create convenience method that doesn't require an existing object - code += method_signature + "(ByteBuffer _bb) "; - code += "{ return " + method_name + "(_bb, new " + struct_def.name + - "()); }\n"; - - // create method that allows object reuse - code += - method_signature + "(ByteBuffer _bb, " + struct_def.name + " obj) { "; - code += "_bb.order(ByteOrder.LITTLE_ENDIAN); "; - code += "return (obj.__assign(_bb.getInt(_bb."; - code += "position()"; - code += ") + _bb."; - code += "position()"; - code += ", _bb)); }\n"; - if (parser_.root_struct_def_ == &struct_def) { - if (parser_.file_identifier_.length()) { - // Check if a buffer has the identifier. - code += " public static "; - code += "boolean " + struct_def.name; - code += "BufferHasIdentifier(ByteBuffer _bb) { return "; - code += "__has_identifier(_bb, \""; - code += parser_.file_identifier_; - code += "\"); }\n"; - } - } - } - // Generate the __init method that sets the field in a pre-existing - // accessor object. This is to allow object reuse. - code += " public void __init(int _i, ByteBuffer _bb) "; - code += "{ "; - code += "__reset(_i, _bb); "; - code += "}\n"; - code += - " public " + struct_def.name + " __assign(int _i, ByteBuffer _bb) "; - code += "{ __init(_i, _bb); return this; }\n\n"; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - if (field.deprecated) continue; - GenComment(field.doc_comment, code_ptr, &comment_config, " "); - std::string type_name = GenTypeGet(field.value.type); - std::string type_name_dest = GenTypeNameDest(field.value.type); - std::string conditional_cast = ""; - std::string optional = ""; - std::string dest_mask = DestinationMask(field.value.type, true); - std::string dest_cast = DestinationCast(field.value.type); - std::string src_cast = SourceCast(field.value.type); - std::string method_start = - " public " + - (field.IsRequired() ? "" : GenNullableAnnotation(field.value.type)) + - GenPureAnnotation(field.value.type) + type_name_dest + optional + - " " + MakeCamel(field.name, false); - std::string obj = "obj"; - - // Most field accessors need to retrieve and test the field offset first, - // this is the prefix code for that: - auto offset_prefix = - IsArray(field.value.type) - ? " { return " - : (" { int o = __offset(" + NumToString(field.value.offset) + - "); return o != 0 ? "); - // Generate the accessors that don't do object reuse. - if (field.value.type.base_type == BASE_TYPE_STRUCT) { - // Calls the accessor that takes an accessor object with a new object. - code += method_start + "() { return "; - code += MakeCamel(field.name, false); - code += "(new "; - code += type_name + "()); }\n"; - } else if (IsVector(field.value.type) && - field.value.type.element == BASE_TYPE_STRUCT) { - // Accessors for vectors of structs also take accessor objects, this - // generates a variant without that argument. - code += method_start + "(int j) { return "; - code += MakeCamel(field.name, false); - code += "(new " + type_name + "(), j); }\n"; - } - - if (field.IsScalarOptional()) { code += GenOptionalScalarCheck(field); } - std::string getter = dest_cast + GenGetter(field.value.type); - code += method_start; - std::string default_cast = ""; - std::string member_suffix = "; "; - if (IsScalar(field.value.type.base_type)) { - code += "()"; - member_suffix += ""; - if (struct_def.fixed) { - code += " { return " + getter; - code += "(bb_pos + "; - code += NumToString(field.value.offset) + ")"; - code += dest_mask; - } else { - code += offset_prefix + getter; - code += "(o + bb_pos)" + dest_mask; - code += " : " + default_cast; - code += GenDefaultValue(field); - } - } else { - switch (field.value.type.base_type) { - case BASE_TYPE_STRUCT: - code += "(" + type_name + " obj)"; - if (struct_def.fixed) { - code += " { return " + obj + ".__assign("; - code += "bb_pos + " + NumToString(field.value.offset) + ", "; - code += "bb)"; - } else { - code += offset_prefix + conditional_cast; - code += obj + ".__assign("; - code += field.value.type.struct_def->fixed - ? "o + bb_pos" - : "__indirect(o + bb_pos)"; - code += ", bb) : null"; - } - break; - case BASE_TYPE_STRING: - code += "()"; - member_suffix += ""; - code += offset_prefix + getter + "(o + "; - code += "bb_pos) : null"; - break; - case BASE_TYPE_ARRAY: FLATBUFFERS_FALLTHROUGH(); // fall thru - case BASE_TYPE_VECTOR: { - auto vectortype = field.value.type.VectorType(); - code += "("; - if (vectortype.base_type == BASE_TYPE_STRUCT) { - code += type_name + " obj, "; - getter = obj + ".__assign"; - } else if (vectortype.base_type == BASE_TYPE_UNION) { - code += type_name + " obj, "; - } - code += "int j)"; - const auto body = offset_prefix + conditional_cast + getter + "("; - if (vectortype.base_type == BASE_TYPE_UNION) { - code += body + "obj, "; - } else { - code += body; - } - std::string index; - if (IsArray(field.value.type)) { - index += "bb_pos + " + NumToString(field.value.offset) + " + "; - } else { - index += "__vector(o) + "; - } - index += "j * " + NumToString(InlineSize(vectortype)); - if (vectortype.base_type == BASE_TYPE_STRUCT) { - code += vectortype.struct_def->fixed - ? index - : "__indirect(" + index + ")"; - code += ", bb"; - } else { - code += index; - } - code += ")" + dest_mask; - if (!IsArray(field.value.type)) { - code += " : "; - code += - field.value.type.element == BASE_TYPE_BOOL - ? "false" - : (IsScalar(field.value.type.element) ? default_cast + "0" - : "null"); - } - - break; - } - case BASE_TYPE_UNION: - code += "(" + type_name + " obj)" + offset_prefix + getter; - code += "(obj, o + bb_pos) : null"; - break; - default: FLATBUFFERS_ASSERT(0); - } - } - code += member_suffix; - code += "}\n"; - if (IsVector(field.value.type)) { - code += " public int " + MakeCamel(field.name, false); - code += "Length"; - code += "()"; - code += offset_prefix; - code += "__vector_len(o) : 0; "; - code += ""; - code += "}\n"; - // See if we should generate a by-key accessor. - if (field.value.type.element == BASE_TYPE_STRUCT && - !field.value.type.struct_def->fixed) { - auto &sd = *field.value.type.struct_def; - auto &fields = sd.fields.vec; - for (auto kit = fields.begin(); kit != fields.end(); ++kit) { - auto &key_field = **kit; - if (key_field.key) { - auto qualified_name = WrapInNameSpace(sd); - code += " public " + qualified_name + " "; - code += MakeCamel(field.name, false) + "ByKey("; - code += GenTypeNameDest(key_field.value.type) + " key)"; - code += offset_prefix; - code += qualified_name + ".__lookup_by_key("; - code += "null, "; - code += "__vector(o), key, "; - code += "bb) : null; "; - code += "}\n"; - code += " public " + qualified_name + " "; - code += MakeCamel(field.name, false) + "ByKey("; - code += qualified_name + " obj, "; - code += GenTypeNameDest(key_field.value.type) + " key)"; - code += offset_prefix; - code += qualified_name + ".__lookup_by_key(obj, "; - code += "__vector(o), key, "; - code += "bb) : null; "; - code += "}\n"; - break; - } - } - } - } - // Generate the accessors for vector of structs with vector access object - if (IsVector(field.value.type)) { - std::string vector_type_name; - const auto &element_base_type = field.value.type.VectorType().base_type; - if (IsScalar(element_base_type)) { - vector_type_name = MakeCamel(type_name, true) + "Vector"; - } else if (element_base_type == BASE_TYPE_STRING) { - vector_type_name = "StringVector"; - } else if (element_base_type == BASE_TYPE_UNION) { - vector_type_name = "UnionVector"; - } else { - vector_type_name = type_name + ".Vector"; - } - auto vector_method_start = GenNullableAnnotation(field.value.type) + - " public " + vector_type_name + optional + - " " + MakeCamel(field.name, false) + - "Vector"; - code += vector_method_start + "() { return "; - code += MakeCamel(field.name, false) + "Vector"; - code += "(new " + vector_type_name + "()); }\n"; - code += vector_method_start + "(" + vector_type_name + " obj)"; - code += offset_prefix + conditional_cast + obj + ".__assign("; - code += "__vector(o), "; - if (!IsScalar(element_base_type)) { - auto vectortype = field.value.type.VectorType(); - code += NumToString(InlineSize(vectortype)) + ", "; - } - code += "bb) : null" + member_suffix + "}\n"; - } - // Generate a ByteBuffer accessor for strings & vectors of scalars. - if ((IsVector(field.value.type) && - IsScalar(field.value.type.VectorType().base_type)) || - IsString(field.value.type)) { - code += " public ByteBuffer "; - code += MakeCamel(field.name, false); - code += "AsByteBuffer() { return "; - code += "__vector_as_bytebuffer("; - code += NumToString(field.value.offset) + ", "; - code += NumToString(IsString(field.value.type) - ? 1 - : InlineSize(field.value.type.VectorType())); - code += "); }\n"; - code += " public ByteBuffer "; - code += MakeCamel(field.name, false); - code += "InByteBuffer(ByteBuffer _bb) { return "; - code += "__vector_in_bytebuffer(_bb, "; - code += NumToString(field.value.offset) + ", "; - code += NumToString(IsString(field.value.type) - ? 1 - : InlineSize(field.value.type.VectorType())); - code += "); }\n"; - } - // generate object accessors if is nested_flatbuffer - if (field.nested_flatbuffer) { - auto nested_type_name = WrapInNameSpace(*field.nested_flatbuffer); - auto nested_method_name = - MakeCamel(field.name, false) + "As" + field.nested_flatbuffer->name; - auto get_nested_method_name = nested_method_name; - code += " public " + nested_type_name + " "; - code += nested_method_name + "() { return "; - code += - get_nested_method_name + "(new " + nested_type_name + "()); }\n"; - code += " public " + nested_type_name + " "; - code += get_nested_method_name + "("; - code += nested_type_name + " obj"; - code += ") { int o = __offset("; - code += NumToString(field.value.offset) + "); "; - code += "return o != 0 ? " + conditional_cast + obj + ".__assign("; - code += ""; - code += "__indirect(__vector(o)), "; - code += "bb) : null; }\n"; - } - // Generate mutators for scalar fields or vectors of scalars. - if (parser_.opts.mutable_buffer) { - auto is_series = (IsSeries(field.value.type)); - const auto &underlying_type = - is_series ? field.value.type.VectorType() : field.value.type; - // Boolean parameters have to be explicitly converted to byte - // representation. - auto setter_parameter = underlying_type.base_type == BASE_TYPE_BOOL - ? "(byte)(" + field.name + " ? 1 : 0)" - : field.name; - auto mutator_prefix = MakeCamel("mutate", false); - // A vector mutator also needs the index of the vector element it should - // mutate. - auto mutator_params = (is_series ? "(int j, " : "(") + - GenTypeNameDest(underlying_type) + " " + - field.name + ") { "; - auto setter_index = - is_series - ? (IsArray(field.value.type) - ? "bb_pos + " + NumToString(field.value.offset) - : "__vector(o)") + - +" + j * " + NumToString(InlineSize(underlying_type)) - : (struct_def.fixed - ? "bb_pos + " + NumToString(field.value.offset) - : "o + bb_pos"); - if (IsScalar(underlying_type.base_type) && !IsUnion(field.value.type)) { - code += " public "; - code += struct_def.fixed ? "void " : "boolean "; - code += mutator_prefix + MakeCamel(field.name, true); - code += mutator_params; - if (struct_def.fixed) { - code += GenSetter(underlying_type) + "(" + setter_index + ", "; - code += src_cast + setter_parameter + "); }\n"; - } else { - code += "int o = __offset("; - code += NumToString(field.value.offset) + ");"; - code += " if (o != 0) { " + GenSetter(underlying_type); - code += "(" + setter_index + ", " + src_cast + setter_parameter + - "); return true; } else { return false; } }\n"; - } - } - } - if (parser_.opts.java_primitive_has_method && - IsScalar(field.value.type.base_type) && !struct_def.fixed) { - auto vt_offset_constant = " public static final int VT_" + - MakeScreamingCamel(field.name) + " = " + - NumToString(field.value.offset) + ";"; - - code += vt_offset_constant; - code += "\n"; - } - } - code += "\n"; - flatbuffers::FieldDef *key_field = nullptr; - if (struct_def.fixed) { - // create a struct constructor function - code += " public static " + GenOffsetType() + " "; - code += "create"; - code += struct_def.name + "(FlatBufferBuilder builder"; - GenStructArgs(struct_def, code_ptr, ""); - code += ") {\n"; - GenStructBody(struct_def, code_ptr, ""); - code += " return "; - code += GenOffsetConstruct("builder." + std::string("offset()")); - code += ";\n }\n"; - } else { - // Generate a method that creates a table in one go. This is only possible - // when the table has no struct fields, since those have to be created - // inline, and there's no way to do so in Java. - bool has_no_struct_fields = true; - int num_fields = 0; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - if (field.deprecated) continue; - if (IsStruct(field.value.type)) { - has_no_struct_fields = false; - } else { - num_fields++; - } - } - // JVM specifications restrict default constructor params to be < 255. - // Longs and doubles take up 2 units, so we set the limit to be < 127. - if (has_no_struct_fields && num_fields && num_fields < 127) { - // Generate a table constructor of the form: - // public static int createName(FlatBufferBuilder builder, args...) - code += " public static " + GenOffsetType() + " "; - code += "create" + struct_def.name; - code += "(FlatBufferBuilder builder"; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - if (field.deprecated) continue; - code += ",\n "; - code += GenTypeBasic(DestinationType(field.value.type, false)); - code += " "; - code += field.name; - if (!IsScalar(field.value.type.base_type)) code += "Offset"; - } - code += ") {\n builder."; - code += "startTable("; - code += NumToString(struct_def.fields.vec.size()) + ");\n"; - for (size_t size = struct_def.sortbysize ? sizeof(largest_scalar_t) : 1; - size; size /= 2) { - for (auto it = struct_def.fields.vec.rbegin(); - it != struct_def.fields.vec.rend(); ++it) { - auto &field = **it; - if (!field.deprecated && - (!struct_def.sortbysize || - size == SizeOf(field.value.type.base_type))) { - code += " " + struct_def.name + "."; - code += "add"; - code += MakeCamel(field.name) + "(builder, " + field.name; - if (!IsScalar(field.value.type.base_type)) code += "Offset"; - code += ");\n"; - } - } - } - code += " return " + struct_def.name + "."; - code += "end" + struct_def.name; - code += "(builder);\n }\n\n"; - } - // Generate a set of static methods that allow table construction, - // of the form: - // public static void addName(FlatBufferBuilder builder, short name) - // { builder.addShort(id, name, default); } - // Unlike the Create function, these always work. - code += " public static void start"; - code += struct_def.name; - code += "(FlatBufferBuilder builder) { builder."; - code += "startTable("; - code += NumToString(struct_def.fields.vec.size()) + "); }\n"; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - if (field.deprecated) continue; - if (field.key) key_field = &field; - code += " public static void add"; - code += MakeCamel(field.name); - code += "(FlatBufferBuilder builder, "; - code += GenTypeBasic(DestinationType(field.value.type, false)); - auto argname = MakeCamel(field.name, false); - if (!IsScalar(field.value.type.base_type)) argname += "Offset"; - code += " " + argname + ") { builder.add"; - code += GenMethod(field.value.type) + "("; - code += NumToString(it - struct_def.fields.vec.begin()) + ", "; - code += SourceCastBasic(field.value.type); - code += argname; - code += ", "; - code += SourceCastBasic(field.value.type); - code += GenDefaultValue(field); - code += "); }\n"; - if (IsVector(field.value.type)) { - auto vector_type = field.value.type.VectorType(); - auto alignment = InlineAlignment(vector_type); - auto elem_size = InlineSize(vector_type); - if (!IsStruct(vector_type)) { - // generate a method to create a vector from a java array. - if ((vector_type.base_type == BASE_TYPE_CHAR || - vector_type.base_type == BASE_TYPE_UCHAR)) { - // Handle byte[] and ByteBuffers separately for Java - code += " public static " + GenVectorOffsetType() + " "; - code += "create"; - code += MakeCamel(field.name); - code += "Vector(FlatBufferBuilder builder, byte[] data) "; - code += "{ return builder.createByteVector(data); }\n"; - - code += " public static " + GenVectorOffsetType() + " "; - code += "create"; - code += MakeCamel(field.name); - code += "Vector(FlatBufferBuilder builder, ByteBuffer data) "; - code += "{ return builder.createByteVector(data); }\n"; - } else { - code += " public static " + GenVectorOffsetType() + " "; - code += "create"; - code += MakeCamel(field.name); - code += "Vector(FlatBufferBuilder builder, "; - code += GenTypeBasic(vector_type) + "[] data) "; - code += "{ builder.startVector("; - code += NumToString(elem_size); - code += ", data.length, "; - code += NumToString(alignment); - code += "); for (int i = data."; - code += "length - 1; i >= 0; i--) builder."; - code += "add"; - code += GenMethod(vector_type); - code += "("; - code += SourceCastBasic(vector_type, false); - code += "data[i]"; - code += "); return "; - code += "builder.endVector(); }\n"; - } - } - // Generate a method to start a vector, data to be added manually - // after. - code += " public static void start"; - code += MakeCamel(field.name); - code += "Vector(FlatBufferBuilder builder, int numElems) "; - code += "{ builder.startVector("; - code += NumToString(elem_size); - code += ", numElems, " + NumToString(alignment); - code += "); }\n"; - } - } - code += " public static " + GenOffsetType() + " "; - code += "end" + struct_def.name; - code += "(FlatBufferBuilder builder) {\n int o = builder."; - code += "endTable();\n"; - for (auto it = struct_def.fields.vec.begin(); - it != struct_def.fields.vec.end(); ++it) { - auto &field = **it; - if (!field.deprecated && field.IsRequired()) { - code += " builder.required(o, "; - code += NumToString(field.value.offset); - code += "); // " + field.name + "\n"; - } - } - code += " return " + GenOffsetConstruct("o") + ";\n }\n"; - if (parser_.root_struct_def_ == &struct_def) { - std::string size_prefix[] = { "", "SizePrefixed" }; - for (int i = 0; i < 2; ++i) { - code += " public static void "; - code += "finish" + size_prefix[i] + struct_def.name; - code += "Buffer(FlatBufferBuilder builder, " + GenOffsetType(); - code += " offset) {"; - code += " builder.finish" + size_prefix[i] + "(offset"; - - if (parser_.file_identifier_.length()) - code += ", \"" + parser_.file_identifier_ + "\""; - code += "); }\n"; - } - } - } - // Only generate key compare function for table, - // because `key_field` is not set for struct - if (struct_def.has_key && !struct_def.fixed) { - FLATBUFFERS_ASSERT(key_field); - code += "\n @Override\n protected int keysCompare("; - code += "Integer o1, Integer o2, ByteBuffer _bb) {"; - code += GenKeyGetter(key_field); - code += " }\n"; - - code += "\n public static " + struct_def.name; - code += " __lookup_by_key("; - code += struct_def.name + " obj, "; - code += "int vectorLocation, "; - code += GenTypeNameDest(key_field->value.type); - code += " key, ByteBuffer bb) {\n"; - if (IsString(key_field->value.type)) { - code += " byte[] byteKey = "; - code += "key.getBytes(java.nio.charset.StandardCharsets.UTF_8);\n"; - } - code += " int span = "; - code += "bb.getInt(vectorLocation - 4);\n"; - code += " int start = 0;\n"; - code += " while (span != 0) {\n"; - code += " int middle = span / 2;\n"; - code += GenLookupKeyGetter(key_field); - code += " if (comp > 0) {\n"; - code += " span = middle;\n"; - code += " } else if (comp < 0) {\n"; - code += " middle++;\n"; - code += " start += middle;\n"; - code += " span -= middle;\n"; - code += " } else {\n"; - code += " return "; - code += "(obj == null ? new " + struct_def.name + "() : obj)"; - code += ".__assign(tableOffset, bb);\n"; - code += " }\n }\n"; - code += " return null;\n"; - code += " }\n"; - } - GenVectorAccessObject(struct_def, code_ptr); - code += "}"; - code += "\n\n"; - } - - std::string GenOptionalScalarCheck(FieldDef &field) const { - if (!field.IsScalarOptional()) return ""; - return " public boolean has" + MakeCamel(field.name, true) + - "() { return 0 != __offset(" + NumToString(field.value.offset) + - "); }\n"; - } - - void GenVectorAccessObject(StructDef &struct_def, - std::string *code_ptr) const { - auto &code = *code_ptr; - // Generate a vector of structs accessor class. - code += "\n"; - code += " "; - if (!struct_def.attributes.Lookup("private")) code += "public "; - code += "static "; - code += "final "; - code += "class Vector extends "; - code += "BaseVector {\n"; - - // Generate the __assign method that sets the field in a pre-existing - // accessor object. This is to allow object reuse. - std::string method_indent = " "; - code += method_indent + "public Vector "; - code += "__assign(int _vector, int _element_size, ByteBuffer _bb) { "; - code += "__reset(_vector, _element_size, _bb); return this; }\n\n"; - - auto type_name = struct_def.name; - auto method_start = method_indent + "public " + type_name + " get"; - // Generate the accessors that don't do object reuse. - code += method_start + "(int j) { return get"; - code += "(new " + type_name + "(), j); }\n"; - code += method_start + "(" + type_name + " obj, int j) { "; - code += " return obj.__assign("; - std::string index = "__element(j)"; - code += struct_def.fixed ? index : "__indirect(" + index + ", bb)"; - code += ", bb); }\n"; - // See if we should generate a by-key accessor. - if (!struct_def.fixed) { - auto &fields = struct_def.fields.vec; - for (auto kit = fields.begin(); kit != fields.end(); ++kit) { - auto &key_field = **kit; - if (key_field.key) { - auto nullable_annotation = - parser_.opts.gen_nullable ? "@Nullable " : ""; - code += method_indent + nullable_annotation; - code += "public " + type_name + " "; - code += "getByKey("; - code += GenTypeNameDest(key_field.value.type) + " key) { "; - code += " return __lookup_by_key(null, "; - code += "__vector(), key, "; - code += "bb); "; - code += "}\n"; - code += method_indent + nullable_annotation; - code += "public " + type_name + " "; - code += "getByKey("; - code += type_name + " obj, "; - code += GenTypeNameDest(key_field.value.type) + " key) { "; - code += " return __lookup_by_key(obj, "; - code += "__vector(), key, "; - code += "bb); "; - code += "}\n"; - break; - } - } - } - code += " }\n"; - } - - // This tracks the current namespace used to determine if a type need to be - // prefixed by its namespace - const Namespace *cur_name_space_; -}; -} // namespace java - -bool GenerateJava(const Parser &parser, const std::string &path, - const std::string &file_name) { - java::JavaGenerator generator(parser, path, file_name); - return generator.generate(); -} - -} // namespace flatbuffers |