diff options
Diffstat (limited to 'src/google/protobuf/compiler/java/java_string_field.cc')
| -rw-r--r-- | src/google/protobuf/compiler/java/java_string_field.cc | 1056 |
1 files changed, 1056 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/java/java_string_field.cc b/src/google/protobuf/compiler/java/java_string_field.cc new file mode 100644 index 0000000..8889a74 --- /dev/null +++ b/src/google/protobuf/compiler/java/java_string_field.cc @@ -0,0 +1,1056 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Author: kenton@google.com (Kenton Varda) +// Author: jonp@google.com (Jon Perlow) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#include <map> +#include <string> + +#include <google/protobuf/stubs/common.h> +#include <google/protobuf/compiler/java/java_context.h> +#include <google/protobuf/compiler/java/java_doc_comment.h> +#include <google/protobuf/compiler/java/java_helpers.h> +#include <google/protobuf/compiler/java/java_name_resolver.h> +#include <google/protobuf/compiler/java/java_string_field.h> +#include <google/protobuf/io/printer.h> +#include <google/protobuf/wire_format.h> +#include <google/protobuf/stubs/strutil.h> + +namespace google { +namespace protobuf { +namespace compiler { +namespace java { + +using internal::WireFormat; +using internal::WireFormatLite; + +namespace { + +void SetPrimitiveVariables(const FieldDescriptor* descriptor, + int messageBitIndex, + int builderBitIndex, + const FieldGeneratorInfo* info, + ClassNameResolver* name_resolver, + map<string, string>* variables) { + SetCommonFieldVariables(descriptor, info, variables); + + (*variables)["empty_list"] = "com.google.protobuf.LazyStringArrayList.EMPTY"; + + (*variables)["default"] = ImmutableDefaultValue(descriptor, name_resolver); + (*variables)["default_init"] = + "= " + ImmutableDefaultValue(descriptor, name_resolver); + (*variables)["capitalized_type"] = "String"; + (*variables)["tag"] = SimpleItoa(WireFormat::MakeTag(descriptor)); + (*variables)["tag_size"] = SimpleItoa( + WireFormat::TagSize(descriptor->number(), GetType(descriptor))); + (*variables)["null_check"] = + " if (value == null) {\n" + " throw new NullPointerException();\n" + " }\n"; + + // TODO(birdo): Add @deprecated javadoc when generating javadoc is supported + // by the proto compiler + (*variables)["deprecation"] = descriptor->options().deprecated() + ? "@java.lang.Deprecated " : ""; + (*variables)["on_changed"] = + HasDescriptorMethods(descriptor->containing_type()) ? "onChanged();" : ""; + + if (SupportFieldPresence(descriptor->file())) { + // For singular messages and builders, one bit is used for the hasField bit. + (*variables)["get_has_field_bit_message"] = GenerateGetBit(messageBitIndex); + (*variables)["get_has_field_bit_builder"] = GenerateGetBit(builderBitIndex); + + // Note that these have a trailing ";". + (*variables)["set_has_field_bit_message"] = + GenerateSetBit(messageBitIndex) + ";"; + (*variables)["set_has_field_bit_builder"] = + GenerateSetBit(builderBitIndex) + ";"; + (*variables)["clear_has_field_bit_builder"] = + GenerateClearBit(builderBitIndex) + ";"; + + (*variables)["is_field_present_message"] = GenerateGetBit(messageBitIndex); + } else { + (*variables)["set_has_field_bit_message"] = ""; + (*variables)["set_has_field_bit_builder"] = ""; + (*variables)["clear_has_field_bit_builder"] = ""; + + (*variables)["is_field_present_message"] = + "!get" + (*variables)["capitalized_name"] + "Bytes().isEmpty()"; + } + + // For repeated builders, one bit is used for whether the array is immutable. + (*variables)["get_mutable_bit_builder"] = GenerateGetBit(builderBitIndex); + (*variables)["set_mutable_bit_builder"] = GenerateSetBit(builderBitIndex); + (*variables)["clear_mutable_bit_builder"] = GenerateClearBit(builderBitIndex); + + // For repeated fields, one bit is used for whether the array is immutable + // in the parsing constructor. + (*variables)["get_mutable_bit_parser"] = + GenerateGetBitMutableLocal(builderBitIndex); + (*variables)["set_mutable_bit_parser"] = + GenerateSetBitMutableLocal(builderBitIndex); + + (*variables)["get_has_field_bit_from_local"] = + GenerateGetBitFromLocal(builderBitIndex); + (*variables)["set_has_field_bit_to_local"] = + GenerateSetBitToLocal(messageBitIndex); +} + +bool CheckUtf8(const FieldDescriptor* descriptor) { + return descriptor->file()->options().java_string_check_utf8(); +} + +} // namespace + +// =================================================================== + +ImmutableStringFieldGenerator:: +ImmutableStringFieldGenerator(const FieldDescriptor* descriptor, + int messageBitIndex, + int builderBitIndex, + Context* context) + : descriptor_(descriptor), messageBitIndex_(messageBitIndex), + builderBitIndex_(builderBitIndex), context_(context), + name_resolver_(context->GetNameResolver()) { + SetPrimitiveVariables(descriptor, messageBitIndex, builderBitIndex, + context->GetFieldGeneratorInfo(descriptor), + name_resolver_, &variables_); +} + +ImmutableStringFieldGenerator::~ImmutableStringFieldGenerator() {} + +int ImmutableStringFieldGenerator::GetNumBitsForMessage() const { + return 1; +} + +int ImmutableStringFieldGenerator::GetNumBitsForBuilder() const { + return 1; +} + +// A note about how strings are handled. This code used to just store a String +// in the Message. This had two issues: +// +// 1. It wouldn't roundtrip byte arrays that were not vaid UTF-8 encoded +// strings, but rather fields that were raw bytes incorrectly marked +// as strings in the proto file. This is common because in the proto1 +// syntax, string was the way to indicate bytes and C++ engineers can +// easily make this mistake without affecting the C++ API. By converting to +// strings immediately, some java code might corrupt these byte arrays as +// it passes through a java server even if the field was never accessed by +// application code. +// +// 2. There's a performance hit to converting between bytes and strings and +// it many cases, the field is never even read by the application code. This +// avoids unnecessary conversions in the common use cases. +// +// So now, the field for String is maintained as an Object reference which can +// either store a String or a ByteString. The code uses an instanceof check +// to see which one it has and converts to the other one if needed. It remembers +// the last value requested (in a thread safe manner) as this is most likely +// the one needed next. The thread safety is such that if two threads both +// convert the field because the changes made by each thread were not visible to +// the other, they may cause a conversion to happen more times than would +// otherwise be necessary. This was deemed better than adding synchronization +// overhead. It will not cause any corruption issues or affect the behavior of +// the API. The instanceof check is also highly optimized in the JVM and we +// decided it was better to reduce the memory overhead by not having two +// separate fields but rather use dynamic type checking. +// +// For single fields, the logic for this is done inside the generated code. For +// repeated fields, the logic is done in LazyStringArrayList and +// UnmodifiableLazyStringList. +void ImmutableStringFieldGenerator:: +GenerateInterfaceMembers(io::Printer* printer) const { + if (SupportFieldPresence(descriptor_->file())) { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$boolean has$capitalized_name$();\n"); + } + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$java.lang.String get$capitalized_name$();\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes();\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateMembers(io::Printer* printer) const { + printer->Print(variables_, + "private java.lang.Object $name$_;\n"); + PrintExtraFieldInfo(variables_, printer); + + if (SupportFieldPresence(descriptor_->file())) { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public boolean has$capitalized_name$() {\n" + " return $get_has_field_bit_message$;\n" + "}\n"); + } + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$() {\n" + " java.lang.Object ref = $name$_;\n" + " if (ref instanceof java.lang.String) {\n" + " return (java.lang.String) ref;\n" + " } else {\n" + " com.google.protobuf.ByteString bs = \n" + " (com.google.protobuf.ByteString) ref;\n" + " java.lang.String s = bs.toStringUtf8();\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " $name$_ = s;\n"); + } else { + printer->Print(variables_, + " if (bs.isValidUtf8()) {\n" + " $name$_ = s;\n" + " }\n"); + } + printer->Print(variables_, + " return s;\n" + " }\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes() {\n" + " java.lang.Object ref = $name$_;\n" + " if (ref instanceof java.lang.String) {\n" + " com.google.protobuf.ByteString b = \n" + " com.google.protobuf.ByteString.copyFromUtf8(\n" + " (java.lang.String) ref);\n" + " $name$_ = b;\n" + " return b;\n" + " } else {\n" + " return (com.google.protobuf.ByteString) ref;\n" + " }\n" + "}\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateBuilderMembers(io::Printer* printer) const { + printer->Print(variables_, + "private java.lang.Object $name$_ $default_init$;\n"); + if (SupportFieldPresence(descriptor_->file())) { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public boolean has$capitalized_name$() {\n" + " return $get_has_field_bit_builder$;\n" + "}\n"); + } + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$() {\n" + " java.lang.Object ref = $name$_;\n" + " if (!(ref instanceof java.lang.String)) {\n" + " com.google.protobuf.ByteString bs =\n" + " (com.google.protobuf.ByteString) ref;\n" + " java.lang.String s = bs.toStringUtf8();\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " $name$_ = s;\n"); + } else { + printer->Print(variables_, + " if (bs.isValidUtf8()) {\n" + " $name$_ = s;\n" + " }\n"); + } + printer->Print(variables_, + " return s;\n" + " } else {\n" + " return (java.lang.String) ref;\n" + " }\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes() {\n" + " java.lang.Object ref = $name$_;\n" + " if (ref instanceof String) {\n" + " com.google.protobuf.ByteString b = \n" + " com.google.protobuf.ByteString.copyFromUtf8(\n" + " (java.lang.String) ref);\n" + " $name$_ = b;\n" + " return b;\n" + " } else {\n" + " return (com.google.protobuf.ByteString) ref;\n" + " }\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder set$capitalized_name$(\n" + " java.lang.String value) {\n" + "$null_check$" + " $set_has_field_bit_builder$\n" + " $name$_ = value;\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder clear$capitalized_name$() {\n" + " $clear_has_field_bit_builder$\n"); + // The default value is not a simple literal so we want to avoid executing + // it multiple times. Instead, get the default out of the default instance. + printer->Print(variables_, + " $name$_ = getDefaultInstance().get$capitalized_name$();\n"); + printer->Print(variables_, + " $on_changed$\n" + " return this;\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder set$capitalized_name$Bytes(\n" + " com.google.protobuf.ByteString value) {\n" + "$null_check$"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " checkByteStringIsUtf8(value);\n"); + } + printer->Print(variables_, + " $set_has_field_bit_builder$\n" + " $name$_ = value;\n" + " $on_changed$\n" + " return this;\n" + "}\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateFieldBuilderInitializationCode(io::Printer* printer) const { + // noop for primitives +} + +void ImmutableStringFieldGenerator:: +GenerateInitializationCode(io::Printer* printer) const { + printer->Print(variables_, "$name$_ = $default$;\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateBuilderClearCode(io::Printer* printer) const { + printer->Print(variables_, + "$name$_ = $default$;\n" + "$clear_has_field_bit_builder$\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateMergingCode(io::Printer* printer) const { + if (SupportFieldPresence(descriptor_->file())) { + // Allow a slight breach of abstraction here in order to avoid forcing + // all string fields to Strings when copying fields from a Message. + printer->Print(variables_, + "if (other.has$capitalized_name$()) {\n" + " $set_has_field_bit_builder$\n" + " $name$_ = other.$name$_;\n" + " $on_changed$\n" + "}\n"); + } else { + printer->Print(variables_, + "if (!other.get$capitalized_name$().isEmpty()) {\n" + " $name$_ = other.$name$_;\n" + " $on_changed$\n" + "}\n"); + } +} + +void ImmutableStringFieldGenerator:: +GenerateBuildingCode(io::Printer* printer) const { + if (SupportFieldPresence(descriptor_->file())) { + printer->Print(variables_, + "if ($get_has_field_bit_from_local$) {\n" + " $set_has_field_bit_to_local$;\n" + "}\n"); + } + printer->Print(variables_, + "result.$name$_ = $name$_;\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateParsingCode(io::Printer* printer) const { + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + "String s = input.readStringRequireUtf8();\n" + "$set_has_field_bit_message$\n" + "$name$_ = s;\n"); + } else { + printer->Print(variables_, + "com.google.protobuf.ByteString bs = input.readBytes();\n" + "$set_has_field_bit_message$\n" + "$name$_ = bs;\n"); + } +} + +void ImmutableStringFieldGenerator:: +GenerateParsingDoneCode(io::Printer* printer) const { + // noop for strings. +} + +void ImmutableStringFieldGenerator:: +GenerateSerializationCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($is_field_present_message$) {\n" + " output.writeBytes($number$, get$capitalized_name$Bytes());\n" + "}\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateSerializedSizeCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($is_field_present_message$) {\n" + " size += com.google.protobuf.CodedOutputStream\n" + " .computeBytesSize($number$, get$capitalized_name$Bytes());\n" + "}\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateEqualsCode(io::Printer* printer) const { + printer->Print(variables_, + "result = result && get$capitalized_name$()\n" + " .equals(other.get$capitalized_name$());\n"); +} + +void ImmutableStringFieldGenerator:: +GenerateHashCode(io::Printer* printer) const { + printer->Print(variables_, + "hash = (37 * hash) + $constant_name$;\n"); + printer->Print(variables_, + "hash = (53 * hash) + get$capitalized_name$().hashCode();\n"); +} + +string ImmutableStringFieldGenerator::GetBoxedType() const { + return "java.lang.String"; +} + +// =================================================================== + +ImmutableStringOneofFieldGenerator:: +ImmutableStringOneofFieldGenerator(const FieldDescriptor* descriptor, + int messageBitIndex, + int builderBitIndex, + Context* context) + : ImmutableStringFieldGenerator( + descriptor, messageBitIndex, builderBitIndex, context) { + const OneofGeneratorInfo* info = + context->GetOneofGeneratorInfo(descriptor->containing_oneof()); + SetCommonOneofVariables(descriptor, info, &variables_); +} + +ImmutableStringOneofFieldGenerator:: +~ImmutableStringOneofFieldGenerator() {} + +void ImmutableStringOneofFieldGenerator:: +GenerateMembers(io::Printer* printer) const { + PrintExtraFieldInfo(variables_, printer); + + if (SupportFieldPresence(descriptor_->file())) { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public boolean has$capitalized_name$() {\n" + " return $has_oneof_case_message$;\n" + "}\n"); + } + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$() {\n" + " java.lang.Object ref $default_init$;\n" + " if ($has_oneof_case_message$) {\n" + " ref = $oneof_name$_;\n" + " }\n" + " if (ref instanceof java.lang.String) {\n" + " return (java.lang.String) ref;\n" + " } else {\n" + " com.google.protobuf.ByteString bs = \n" + " (com.google.protobuf.ByteString) ref;\n" + " java.lang.String s = bs.toStringUtf8();\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " if ($has_oneof_case_message$) {\n" + " $oneof_name$_ = s;\n" + " }\n"); + } else { + printer->Print(variables_, + " if (bs.isValidUtf8() && ($has_oneof_case_message$)) {\n" + " $oneof_name$_ = s;\n" + " }\n"); + } + printer->Print(variables_, + " return s;\n" + " }\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes() {\n" + " java.lang.Object ref $default_init$;\n" + " if ($has_oneof_case_message$) {\n" + " ref = $oneof_name$_;\n" + " }\n" + " if (ref instanceof java.lang.String) {\n" + " com.google.protobuf.ByteString b = \n" + " com.google.protobuf.ByteString.copyFromUtf8(\n" + " (java.lang.String) ref);\n" + " if ($has_oneof_case_message$) {\n" + " $oneof_name$_ = b;\n" + " }\n" + " return b;\n" + " } else {\n" + " return (com.google.protobuf.ByteString) ref;\n" + " }\n" + "}\n"); +} + +void ImmutableStringOneofFieldGenerator:: +GenerateBuilderMembers(io::Printer* printer) const { + if (SupportFieldPresence(descriptor_->file())) { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public boolean has$capitalized_name$() {\n" + " return $has_oneof_case_message$;\n" + "}\n"); + } + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$() {\n" + " java.lang.Object ref $default_init$;\n" + " if ($has_oneof_case_message$) {\n" + " ref = $oneof_name$_;\n" + " }\n" + " if (!(ref instanceof java.lang.String)) {\n" + " com.google.protobuf.ByteString bs =\n" + " (com.google.protobuf.ByteString) ref;\n" + " java.lang.String s = bs.toStringUtf8();\n" + " if ($has_oneof_case_message$) {\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " $oneof_name$_ = s;\n"); + } else { + printer->Print(variables_, + " if (bs.isValidUtf8()) {\n" + " $oneof_name$_ = s;\n" + " }\n"); + } + printer->Print(variables_, + " }\n" + " return s;\n" + " } else {\n" + " return (java.lang.String) ref;\n" + " }\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes() {\n" + " java.lang.Object ref $default_init$;\n" + " if ($has_oneof_case_message$) {\n" + " ref = $oneof_name$_;\n" + " }\n" + " if (ref instanceof String) {\n" + " com.google.protobuf.ByteString b = \n" + " com.google.protobuf.ByteString.copyFromUtf8(\n" + " (java.lang.String) ref);\n" + " if ($has_oneof_case_message$) {\n" + " $oneof_name$_ = b;\n" + " }\n" + " return b;\n" + " } else {\n" + " return (com.google.protobuf.ByteString) ref;\n" + " }\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder set$capitalized_name$(\n" + " java.lang.String value) {\n" + "$null_check$" + " $set_oneof_case_message$;\n" + " $oneof_name$_ = value;\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder clear$capitalized_name$() {\n" + " if ($has_oneof_case_message$) {\n" + " $clear_oneof_case_message$;\n" + " $oneof_name$_ = null;\n" + " $on_changed$\n" + " }\n" + " return this;\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder set$capitalized_name$Bytes(\n" + " com.google.protobuf.ByteString value) {\n" + "$null_check$"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " checkByteStringIsUtf8(value);\n"); + } + printer->Print(variables_, + " $set_oneof_case_message$;\n" + " $oneof_name$_ = value;\n" + " $on_changed$\n" + " return this;\n" + "}\n"); +} + +void ImmutableStringOneofFieldGenerator:: +GenerateMergingCode(io::Printer* printer) const { + // Allow a slight breach of abstraction here in order to avoid forcing + // all string fields to Strings when copying fields from a Message. + printer->Print(variables_, + "$set_oneof_case_message$;\n" + "$oneof_name$_ = other.$oneof_name$_;\n" + "$on_changed$\n"); +} + +void ImmutableStringOneofFieldGenerator:: +GenerateBuildingCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($has_oneof_case_message$) {\n" + " result.$oneof_name$_ = $oneof_name$_;\n" + "}\n"); +} + +void ImmutableStringOneofFieldGenerator:: +GenerateParsingCode(io::Printer* printer) const { + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + "String s = input.readStringRequireUtf8();\n" + "$set_oneof_case_message$;\n" + "$oneof_name$_ = s;\n}\n"); + } else { + printer->Print(variables_, + "com.google.protobuf.ByteString bs = input.readBytes();\n" + "$set_oneof_case_message$;\n" + "$oneof_name$_ = bs;\n"); + } +} + +void ImmutableStringOneofFieldGenerator:: +GenerateSerializationCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($has_oneof_case_message$) {\n" + " output.writeBytes($number$, get$capitalized_name$Bytes());\n" + "}\n"); +} + +void ImmutableStringOneofFieldGenerator:: +GenerateSerializedSizeCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($has_oneof_case_message$) {\n" + " size += com.google.protobuf.CodedOutputStream\n" + " .computeBytesSize($number$, get$capitalized_name$Bytes());\n" + "}\n"); +} + +// =================================================================== + +RepeatedImmutableStringFieldGenerator:: +RepeatedImmutableStringFieldGenerator(const FieldDescriptor* descriptor, + int messageBitIndex, + int builderBitIndex, + Context* context) + : descriptor_(descriptor), messageBitIndex_(messageBitIndex), + builderBitIndex_(builderBitIndex), context_(context), + name_resolver_(context->GetNameResolver()) { + SetPrimitiveVariables(descriptor, messageBitIndex, builderBitIndex, + context->GetFieldGeneratorInfo(descriptor), + name_resolver_, &variables_); +} + +RepeatedImmutableStringFieldGenerator:: +~RepeatedImmutableStringFieldGenerator() {} + +int RepeatedImmutableStringFieldGenerator::GetNumBitsForMessage() const { + return 0; +} + +int RepeatedImmutableStringFieldGenerator::GetNumBitsForBuilder() const { + return 1; +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateInterfaceMembers(io::Printer* printer) const { + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$com.google.protobuf.ProtocolStringList\n" + " get$capitalized_name$List();\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$int get$capitalized_name$Count();\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$java.lang.String get$capitalized_name$(int index);\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes(int index);\n"); +} + + +void RepeatedImmutableStringFieldGenerator:: +GenerateMembers(io::Printer* printer) const { + printer->Print(variables_, + "private com.google.protobuf.LazyStringList $name$_;\n"); + PrintExtraFieldInfo(variables_, printer); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ProtocolStringList\n" + " get$capitalized_name$List() {\n" + " return $name$_;\n" // note: unmodifiable list + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public int get$capitalized_name$Count() {\n" + " return $name$_.size();\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$(int index) {\n" + " return $name$_.get(index);\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes(int index) {\n" + " return $name$_.getByteString(index);\n" + "}\n"); + + if (descriptor_->options().packed() && + HasGeneratedMethods(descriptor_->containing_type())) { + printer->Print(variables_, + "private int $name$MemoizedSerializedSize = -1;\n"); + } +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateBuilderMembers(io::Printer* printer) const { + // One field is the list and the bit field keeps track of whether the + // list is immutable. If it's immutable, the invariant is that it must + // either an instance of Collections.emptyList() or it's an ArrayList + // wrapped in a Collections.unmodifiableList() wrapper and nobody else has + // a refererence to the underlying ArrayList. This invariant allows us to + // share instances of lists between protocol buffers avoiding expensive + // memory allocations. Note, immutable is a strong guarantee here -- not + // just that the list cannot be modified via the reference but that the + // list can never be modified. + printer->Print(variables_, + "private com.google.protobuf.LazyStringList $name$_ = $empty_list$;\n"); + + printer->Print(variables_, + "private void ensure$capitalized_name$IsMutable() {\n" + " if (!$get_mutable_bit_builder$) {\n" + " $name$_ = new com.google.protobuf.LazyStringArrayList($name$_);\n" + " $set_mutable_bit_builder$;\n" + " }\n" + "}\n"); + + // Note: We return an unmodifiable list because otherwise the caller + // could hold on to the returned list and modify it after the message + // has been built, thus mutating the message which is supposed to be + // immutable. + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ProtocolStringList\n" + " get$capitalized_name$List() {\n" + " return $name$_.getUnmodifiableView();\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public int get$capitalized_name$Count() {\n" + " return $name$_.size();\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public java.lang.String get$capitalized_name$(int index) {\n" + " return $name$_.get(index);\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public com.google.protobuf.ByteString\n" + " get$capitalized_name$Bytes(int index) {\n" + " return $name$_.getByteString(index);\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder set$capitalized_name$(\n" + " int index, java.lang.String value) {\n" + "$null_check$" + " ensure$capitalized_name$IsMutable();\n" + " $name$_.set(index, value);\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder add$capitalized_name$(\n" + " java.lang.String value) {\n" + "$null_check$" + " ensure$capitalized_name$IsMutable();\n" + " $name$_.add(value);\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder addAll$capitalized_name$(\n" + " java.lang.Iterable<java.lang.String> values) {\n" + " ensure$capitalized_name$IsMutable();\n" + " com.google.protobuf.AbstractMessageLite.Builder.addAll(\n" + " values, $name$_);\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder clear$capitalized_name$() {\n" + " $name$_ = $empty_list$;\n" + " $clear_mutable_bit_builder$;\n" + " $on_changed$\n" + " return this;\n" + "}\n"); + + WriteFieldDocComment(printer, descriptor_); + printer->Print(variables_, + "$deprecation$public Builder add$capitalized_name$Bytes(\n" + " com.google.protobuf.ByteString value) {\n" + "$null_check$"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " checkByteStringIsUtf8(value);\n"); + } + printer->Print(variables_, + " ensure$capitalized_name$IsMutable();\n" + " $name$_.add(value);\n" + " $on_changed$\n" + " return this;\n" + "}\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateFieldBuilderInitializationCode(io::Printer* printer) const { + // noop for primitives +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateInitializationCode(io::Printer* printer) const { + printer->Print(variables_, "$name$_ = $empty_list$;\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateBuilderClearCode(io::Printer* printer) const { + printer->Print(variables_, + "$name$_ = $empty_list$;\n" + "$clear_mutable_bit_builder$;\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateMergingCode(io::Printer* printer) const { + // The code below does two optimizations: + // 1. If the other list is empty, there's nothing to do. This ensures we + // don't allocate a new array if we already have an immutable one. + // 2. If the other list is non-empty and our current list is empty, we can + // reuse the other list which is guaranteed to be immutable. + printer->Print(variables_, + "if (!other.$name$_.isEmpty()) {\n" + " if ($name$_.isEmpty()) {\n" + " $name$_ = other.$name$_;\n" + " $clear_mutable_bit_builder$;\n" + " } else {\n" + " ensure$capitalized_name$IsMutable();\n" + " $name$_.addAll(other.$name$_);\n" + " }\n" + " $on_changed$\n" + "}\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateBuildingCode(io::Printer* printer) const { + // The code below ensures that the result has an immutable list. If our + // list is immutable, we can just reuse it. If not, we make it immutable. + + printer->Print(variables_, + "if ($get_mutable_bit_builder$) {\n" + " $name$_ = $name$_.getUnmodifiableView();\n" + " $clear_mutable_bit_builder$;\n" + "}\n" + "result.$name$_ = $name$_;\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateParsingCode(io::Printer* printer) const { + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + "String s = input.readStringRequireUtf8();\n"); + } else { + printer->Print(variables_, + "com.google.protobuf.ByteString bs = input.readBytes();\n"); + } + printer->Print(variables_, + "if (!$get_mutable_bit_parser$) {\n" + " $name$_ = new com.google.protobuf.LazyStringArrayList();\n" + " $set_mutable_bit_parser$;\n" + "}\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + "$name$_.add(s);\n"); + } else { + printer->Print(variables_, + "$name$_.add(bs);\n"); + } +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateParsingCodeFromPacked(io::Printer* printer) const { + printer->Print(variables_, + "int length = input.readRawVarint32();\n" + "int limit = input.pushLimit(length);\n" + "if (!$get_mutable_bit_parser$ && input.getBytesUntilLimit() > 0) {\n" + " $name$_ = new com.google.protobuf.LazyStringArrayList();\n" + " $set_mutable_bit_parser$;\n" + "}\n" + "while (input.getBytesUntilLimit() > 0) {\n"); + if (CheckUtf8(descriptor_)) { + printer->Print(variables_, + " String s = input.readStringRequireUtf8();\n"); + } else { + printer->Print(variables_, + " String s = input.readString();\n"); + } + printer->Print(variables_, + " $name$.add(s);\n"); + printer->Print(variables_, + "}\n" + "input.popLimit(limit);\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateParsingDoneCode(io::Printer* printer) const { + printer->Print(variables_, + "if ($get_mutable_bit_parser$) {\n" + " $name$_ = $name$_.getUnmodifiableView();\n" + "}\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateSerializationCode(io::Printer* printer) const { + if (descriptor_->options().packed()) { + printer->Print(variables_, + "if (get$capitalized_name$List().size() > 0) {\n" + " output.writeRawVarint32($tag$);\n" + " output.writeRawVarint32($name$MemoizedSerializedSize);\n" + "}\n" + "for (int i = 0; i < $name$_.size(); i++) {\n" + " output.write$capitalized_type$NoTag($name$_.get(i));\n" + "}\n"); + } else { + printer->Print(variables_, + "for (int i = 0; i < $name$_.size(); i++) {\n" + " output.writeBytes($number$, $name$_.getByteString(i));\n" + "}\n"); + } +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateSerializedSizeCode(io::Printer* printer) const { + printer->Print(variables_, + "{\n" + " int dataSize = 0;\n"); + printer->Indent(); + + printer->Print(variables_, + "for (int i = 0; i < $name$_.size(); i++) {\n" + " dataSize += com.google.protobuf.CodedOutputStream\n" + " .computeBytesSizeNoTag($name$_.getByteString(i));\n" + "}\n"); + + printer->Print( + "size += dataSize;\n"); + + if (descriptor_->options().packed()) { + printer->Print(variables_, + "if (!get$capitalized_name$List().isEmpty()) {\n" + " size += $tag_size$;\n" + " size += com.google.protobuf.CodedOutputStream\n" + " .computeInt32SizeNoTag(dataSize);\n" + "}\n"); + } else { + printer->Print(variables_, + "size += $tag_size$ * get$capitalized_name$List().size();\n"); + } + + // cache the data size for packed fields. + if (descriptor_->options().packed()) { + printer->Print(variables_, + "$name$MemoizedSerializedSize = dataSize;\n"); + } + + printer->Outdent(); + printer->Print("}\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateEqualsCode(io::Printer* printer) const { + printer->Print(variables_, + "result = result && get$capitalized_name$List()\n" + " .equals(other.get$capitalized_name$List());\n"); +} + +void RepeatedImmutableStringFieldGenerator:: +GenerateHashCode(io::Printer* printer) const { + printer->Print(variables_, + "if (get$capitalized_name$Count() > 0) {\n" + " hash = (37 * hash) + $constant_name$;\n" + " hash = (53 * hash) + get$capitalized_name$List().hashCode();\n" + "}\n"); +} + +string RepeatedImmutableStringFieldGenerator::GetBoxedType() const { + return "String"; +} + +} // namespace java +} // namespace compiler +} // namespace protobuf +} // namespace google |