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authormax42 <max42@yandex-team.com>2023-06-30 11:13:34 +0300
committermax42 <max42@yandex-team.com>2023-06-30 11:13:34 +0300
commit3e1899838408bbad47622007aa382bc8a2b01f87 (patch)
tree0f21c1e6add187ddb6c3ccc048a7d640ce03fb87 /contrib/libs/flatbuffers/src/idl_gen_java.cpp
parent5463eb3f5e72a86f858a3d27c886470a724ede34 (diff)
downloadydb-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.cpp1244
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