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Diffstat (limited to 'src/google/protobuf/compiler/java/java_enum.cc')
| -rw-r--r-- | src/google/protobuf/compiler/java/java_enum.cc | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/java/java_enum.cc b/src/google/protobuf/compiler/java/java_enum.cc new file mode 100644 index 0000000..8ade50c --- /dev/null +++ b/src/google/protobuf/compiler/java/java_enum.cc @@ -0,0 +1,233 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// http://code.google.com/p/protobuf/ +// +// 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) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#include <map> +#include <string> + +#include <google/protobuf/compiler/java/java_enum.h> +#include <google/protobuf/compiler/java/java_helpers.h> +#include <google/protobuf/io/printer.h> +#include <google/protobuf/descriptor.pb.h> +#include <google/protobuf/stubs/strutil.h> + +namespace google { +namespace protobuf { +namespace compiler { +namespace java { + +EnumGenerator::EnumGenerator(const EnumDescriptor* descriptor) + : descriptor_(descriptor) { + for (int i = 0; i < descriptor_->value_count(); i++) { + const EnumValueDescriptor* value = descriptor_->value(i); + const EnumValueDescriptor* canonical_value = + descriptor_->FindValueByNumber(value->number()); + + if (value == canonical_value) { + canonical_values_.push_back(value); + } else { + Alias alias; + alias.value = value; + alias.canonical_value = canonical_value; + aliases_.push_back(alias); + } + } +} + +EnumGenerator::~EnumGenerator() {} + +void EnumGenerator::Generate(io::Printer* printer) { + if (HasDescriptorMethods(descriptor_)) { + printer->Print( + "public enum $classname$\n" + " implements com.google.protobuf.ProtocolMessageEnum {\n", + "classname", descriptor_->name()); + } else { + printer->Print( + "public enum $classname$\n" + " implements com.google.protobuf.Internal.EnumLite {\n", + "classname", descriptor_->name()); + } + printer->Indent(); + + for (int i = 0; i < canonical_values_.size(); i++) { + map<string, string> vars; + vars["name"] = canonical_values_[i]->name(); + vars["index"] = SimpleItoa(canonical_values_[i]->index()); + vars["number"] = SimpleItoa(canonical_values_[i]->number()); + printer->Print(vars, + "$name$($index$, $number$),\n"); + } + + printer->Print( + ";\n" + "\n"); + + // ----------------------------------------------------------------- + + for (int i = 0; i < aliases_.size(); i++) { + map<string, string> vars; + vars["classname"] = descriptor_->name(); + vars["name"] = aliases_[i].value->name(); + vars["canonical_name"] = aliases_[i].canonical_value->name(); + printer->Print(vars, + "public static final $classname$ $name$ = $canonical_name$;\n"); + } + + // ----------------------------------------------------------------- + + printer->Print( + "\n" + "public final int getNumber() { return value; }\n" + "\n" + "public static $classname$ valueOf(int value) {\n" + " switch (value) {\n", + "classname", descriptor_->name()); + printer->Indent(); + printer->Indent(); + + for (int i = 0; i < canonical_values_.size(); i++) { + printer->Print( + "case $number$: return $name$;\n", + "name", canonical_values_[i]->name(), + "number", SimpleItoa(canonical_values_[i]->number())); + } + + printer->Outdent(); + printer->Outdent(); + printer->Print( + " default: return null;\n" + " }\n" + "}\n" + "\n" + "public static com.google.protobuf.Internal.EnumLiteMap<$classname$>\n" + " internalGetValueMap() {\n" + " return internalValueMap;\n" + "}\n" + "private static com.google.protobuf.Internal.EnumLiteMap<$classname$>\n" + " internalValueMap =\n" + " new com.google.protobuf.Internal.EnumLiteMap<$classname$>() {\n" + " public $classname$ findValueByNumber(int number) {\n" + " return $classname$.valueOf(number)\n;" + " }\n" + " };\n" + "\n", + "classname", descriptor_->name()); + + // ----------------------------------------------------------------- + // Reflection + + if (HasDescriptorMethods(descriptor_)) { + printer->Print( + "public final com.google.protobuf.Descriptors.EnumValueDescriptor\n" + " getValueDescriptor() {\n" + " return getDescriptor().getValues().get(index);\n" + "}\n" + "public final com.google.protobuf.Descriptors.EnumDescriptor\n" + " getDescriptorForType() {\n" + " return getDescriptor();\n" + "}\n" + "public static final com.google.protobuf.Descriptors.EnumDescriptor\n" + " getDescriptor() {\n"); + + // TODO(kenton): Cache statically? Note that we can't access descriptors + // at module init time because it wouldn't work with descriptor.proto, but + // we can cache the value the first time getDescriptor() is called. + if (descriptor_->containing_type() == NULL) { + printer->Print( + " return $file$.getDescriptor().getEnumTypes().get($index$);\n", + "file", ClassName(descriptor_->file()), + "index", SimpleItoa(descriptor_->index())); + } else { + printer->Print( + " return $parent$.getDescriptor().getEnumTypes().get($index$);\n", + "parent", ClassName(descriptor_->containing_type()), + "index", SimpleItoa(descriptor_->index())); + } + + printer->Print( + "}\n" + "\n" + "private static final $classname$[] VALUES = {\n" + " ", + "classname", descriptor_->name()); + + for (int i = 0; i < descriptor_->value_count(); i++) { + printer->Print("$name$, ", + "name", descriptor_->value(i)->name()); + } + + printer->Print( + "\n" + "};\n" + "public static $classname$ valueOf(\n" + " com.google.protobuf.Descriptors.EnumValueDescriptor desc) {\n" + " if (desc.getType() != getDescriptor()) {\n" + " throw new java.lang.IllegalArgumentException(\n" + " \"EnumValueDescriptor is not for this type.\");\n" + " }\n" + " return VALUES[desc.getIndex()];\n" + "}\n", + "classname", descriptor_->name()); + } + + // ----------------------------------------------------------------- + + printer->Print( + "private final int index;\n" + "private final int value;\n" + "private $classname$(int index, int value) {\n" + " this.index = index;\n" + " this.value = value;\n" + "}\n", + "classname", descriptor_->name()); + + if (HasDescriptorMethods(descriptor_)) { + // Force the static initialization code for the file to run, since it may + // initialize static variables declared in this class. + printer->Print( + "\n" + "static {\n" + " $file$.getDescriptor();\n" + "}\n", + "file", ClassName(descriptor_->file())); + } + + printer->Outdent(); + printer->Print("}\n\n"); +} + +} // namespace java +} // namespace compiler +} // namespace protobuf +} // namespace google |