1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 // Author: kenton@google.com (Kenton Varda)
32 // Based on original Protocol Buffers design by
33 // Sanjay Ghemawat, Jeff Dean, and others.
35 #ifndef GOOGLE_PROTOBUF_COMPILER_JAVA_HELPERS_H__
36 #define GOOGLE_PROTOBUF_COMPILER_JAVA_HELPERS_H__
39 #include <google/protobuf/descriptor.pb.h>
40 #include <google/protobuf/descriptor.h>
47 // Commonly-used separator comments. Thick is a line of '=', thin is a line
49 extern const char kThickSeparator[];
50 extern const char kThinSeparator[];
52 // Converts a name to camel-case. If cap_first_letter is true, capitalize the
54 string UnderscoresToCamelCase(const string& name, bool cap_first_letter);
55 // Converts the field's name to camel-case, e.g. "foo_bar_baz" becomes
56 // "fooBarBaz" or "FooBarBaz", respectively.
57 string UnderscoresToCamelCase(const FieldDescriptor* field);
58 string UnderscoresToCapitalizedCamelCase(const FieldDescriptor* field);
60 // Similar, but for method names. (Typically, this merely has the effect
61 // of lower-casing the first letter of the name.)
62 string UnderscoresToCamelCase(const MethodDescriptor* method);
64 // Get an identifier that uniquely identifies this type within the file.
65 // This is used to declare static variables related to this type at the
66 // outermost file scope.
67 string UniqueFileScopeIdentifier(const Descriptor* descriptor);
69 // Strips ".proto" or ".protodevel" from the end of a filename.
70 string StripProto(const string& filename);
72 // Gets the unqualified class name for the file. For each .proto file, there
73 // will be one Java class containing all the immutable messages and another
74 // Java class containing all the mutable messages.
75 // TODO(xiaofeng): remove the default value after updating client code.
76 string FileClassName(const FileDescriptor* file, bool immutable = true);
78 // Returns the file's Java package name.
79 string FileJavaPackage(const FileDescriptor* file, bool immutable = true);
81 // Returns output directory for the given package name.
82 string JavaPackageToDir(string package_name);
84 // Converts the given fully-qualified name in the proto namespace to its
85 // fully-qualified name in the Java namespace, given that it is in the given
87 // TODO(xiaofeng): this method is deprecated and should be removed in the
89 string ToJavaName(const string& full_name,
90 const FileDescriptor* file);
92 // TODO(xiaofeng): the following methods are kept for they are exposed
93 // publicly in //google/protobuf/compiler/java/names.h. They return
94 // immutable names only and should be removed after mutable API is
95 // integrated into google3.
96 string ClassName(const Descriptor* descriptor);
97 string ClassName(const EnumDescriptor* descriptor);
98 string ClassName(const ServiceDescriptor* descriptor);
99 string ClassName(const FileDescriptor* descriptor);
101 // Comma-separate list of option-specified interfaces implemented by the
102 // Message, to follow the "implements" declaration of the Message definition.
103 string ExtraMessageInterfaces(const Descriptor* descriptor);
104 // Comma-separate list of option-specified interfaces implemented by the
105 // MutableMessage, to follow the "implements" declaration of the MutableMessage
107 string ExtraMutableMessageInterfaces(const Descriptor* descriptor);
108 // Comma-separate list of option-specified interfaces implemented by the
109 // Builder, to follow the "implements" declaration of the Builder definition.
110 string ExtraBuilderInterfaces(const Descriptor* descriptor);
111 // Comma-separate list of option-specified interfaces extended by the
112 // MessageOrBuilder, to follow the "extends" declaration of the
113 // MessageOrBuilder definition.
114 string ExtraMessageOrBuilderInterfaces(const Descriptor* descriptor);
116 // Get the unqualified Java class name for mutable messages. i.e. without
117 // package or outer classnames.
118 inline string ShortMutableJavaClassName(const Descriptor* descriptor) {
119 return descriptor->name();
123 // Whether we should generate multiple java files for messages.
124 inline bool MultipleJavaFiles(
125 const FileDescriptor* descriptor, bool immutable) {
126 return descriptor->options().java_multiple_files();
129 // Get the unqualified name that should be used for a field's field
131 string FieldConstantName(const FieldDescriptor *field);
133 // Returns the type of the FieldDescriptor.
134 // This does nothing interesting for the open source release, but is used for
135 // hacks that improve compatability with version 1 protocol buffers at Google.
136 FieldDescriptor::Type GetType(const FieldDescriptor* field);
150 JavaType GetJavaType(const FieldDescriptor* field);
152 // Get the fully-qualified class name for a boxed primitive type, e.g.
153 // "java.lang.Integer" for JAVATYPE_INT. Returns NULL for enum and message
155 const char* BoxedPrimitiveTypeName(JavaType type);
157 // Get the name of the java enum constant representing this type. E.g.,
158 // "INT32" for FieldDescriptor::TYPE_INT32. The enum constant's full
159 // name is "com.google.protobuf.WireFormat.FieldType.INT32".
160 const char* FieldTypeName(const FieldDescriptor::Type field_type);
162 class ClassNameResolver;
163 string DefaultValue(const FieldDescriptor* field, bool immutable,
164 ClassNameResolver* name_resolver);
165 inline string ImmutableDefaultValue(const FieldDescriptor* field,
166 ClassNameResolver* name_resolver) {
167 return DefaultValue(field, true, name_resolver);
169 bool IsDefaultValueJavaDefault(const FieldDescriptor* field);
171 // Does this message class use UnknownFieldSet?
172 // Otherwise, unknown fields will be stored in a ByteString object
173 inline bool UseUnknownFieldSet(const Descriptor* descriptor) {
174 return descriptor->file()->options().optimize_for() !=
175 FileOptions::LITE_RUNTIME;
178 // Does this message class have generated parsing, serialization, and other
179 // standard methods for which reflection-based fallback implementations exist?
180 inline bool HasGeneratedMethods(const Descriptor* descriptor) {
181 return descriptor->file()->options().optimize_for() !=
182 FileOptions::CODE_SIZE;
185 // Does this message have specialized equals() and hashCode() methods?
186 inline bool HasEqualsAndHashCode(const Descriptor* descriptor) {
187 return descriptor->file()->options().java_generate_equals_and_hash();
190 // Does this message class have descriptor and reflection methods?
191 inline bool HasDescriptorMethods(const Descriptor* descriptor) {
192 return descriptor->file()->options().optimize_for() !=
193 FileOptions::LITE_RUNTIME;
195 inline bool HasDescriptorMethods(const EnumDescriptor* descriptor) {
196 return descriptor->file()->options().optimize_for() !=
197 FileOptions::LITE_RUNTIME;
199 inline bool HasDescriptorMethods(const FileDescriptor* descriptor) {
200 return descriptor->options().optimize_for() !=
201 FileOptions::LITE_RUNTIME;
204 inline bool HasNestedBuilders(const Descriptor* descriptor) {
205 // The proto-lite version doesn't support nested builders.
206 return descriptor->file()->options().optimize_for() !=
207 FileOptions::LITE_RUNTIME;
210 // Should we generate generic services for this file?
211 inline bool HasGenericServices(const FileDescriptor *file) {
212 return file->service_count() > 0 &&
213 file->options().optimize_for() != FileOptions::LITE_RUNTIME &&
214 file->options().java_generic_services();
217 inline bool IsLazy(const FieldDescriptor* descriptor) {
218 // Currently, the proto-lite version suports lazy field.
219 // TODO(niwasaki): Support lazy fields also for other proto runtimes.
220 if (descriptor->file()->options().optimize_for() !=
221 FileOptions::LITE_RUNTIME) {
224 return descriptor->options().lazy();
227 // Methods for shared bitfields.
229 // Gets the name of the shared bitfield for the given index.
230 string GetBitFieldName(int index);
232 // Gets the name of the shared bitfield for the given bit index.
233 // Effectively, GetBitFieldName(bitIndex / 32)
234 string GetBitFieldNameForBit(int bitIndex);
236 // Generates the java code for the expression that returns the boolean value
237 // of the bit of the shared bitfields for the given bit index.
238 // Example: "((bitField1_ & 0x04) == 0x04)"
239 string GenerateGetBit(int bitIndex);
241 // Generates the java code for the expression that sets the bit of the shared
242 // bitfields for the given bit index.
243 // Example: "bitField1_ = (bitField1_ | 0x04)"
244 string GenerateSetBit(int bitIndex);
246 // Generates the java code for the expression that clears the bit of the shared
247 // bitfields for the given bit index.
248 // Example: "bitField1_ = (bitField1_ & ~0x04)"
249 string GenerateClearBit(int bitIndex);
251 // Does the same as GenerateGetBit but operates on the bit field on a local
252 // variable. This is used by the builder to copy the value in the builder to
254 // Example: "((from_bitField1_ & 0x04) == 0x04)"
255 string GenerateGetBitFromLocal(int bitIndex);
257 // Does the same as GenerateSetBit but operates on the bit field on a local
258 // variable. This is used by the builder to copy the value in the builder to
260 // Example: "to_bitField1_ = (to_bitField1_ | 0x04)"
261 string GenerateSetBitToLocal(int bitIndex);
263 // Does the same as GenerateGetBit but operates on the bit field on a local
264 // variable. This is used by the parsing constructor to record if a repeated
266 // Example: "((mutable_bitField1_ & 0x04) == 0x04)"
267 string GenerateGetBitMutableLocal(int bitIndex);
269 // Does the same as GenerateSetBit but operates on the bit field on a local
270 // variable. This is used by the parsing constructor to record if a repeated
272 // Example: "mutable_bitField1_ = (mutable_bitField1_ | 0x04)"
273 string GenerateSetBitMutableLocal(int bitIndex);
275 // Returns whether the JavaType is a reference type.
276 bool IsReferenceType(JavaType type);
278 // Returns the capitalized name for calling relative functions in
280 const char* GetCapitalizedType(const FieldDescriptor* field, bool immutable);
282 // For encodings with fixed sizes, returns that size in bytes. Otherwise
284 int FixedSize(FieldDescriptor::Type type);
286 // Comparators used to sort fields in MessageGenerator
287 struct FieldOrderingByNumber {
288 inline bool operator()(const FieldDescriptor* a,
289 const FieldDescriptor* b) const {
290 return a->number() < b->number();
294 struct ExtensionRangeOrdering {
295 bool operator()(const Descriptor::ExtensionRange* a,
296 const Descriptor::ExtensionRange* b) const {
297 return a->start < b->start;
301 // Sort the fields of the given Descriptor by number into a new[]'d array
302 // and return it. The caller should delete the returned array.
303 const FieldDescriptor** SortFieldsByNumber(const Descriptor* descriptor);
305 // Check a message type and its sub-message types recursively to see if any of
306 // them has a required field. Return true if a required field is found.
307 bool HasRequiredFields(const Descriptor* descriptor);
309 // Whether a .proto file supports field presence test for non-message types.
310 inline bool SupportFieldPresence(const FileDescriptor* descriptor) {
314 // Check whether a mesasge has repeated fields.
315 bool HasRepeatedFields(const Descriptor* descriptor);
318 } // namespace compiler
319 } // namespace protobuf
321 } // namespace google
322 #endif // GOOGLE_PROTOBUF_COMPILER_JAVA_HELPERS_H__