Line data Source code
1 : // Protocol Buffers - Google's data interchange format
2 : // Copyright 2008 Google Inc. All rights reserved.
3 : // http://code.google.com/p/protobuf/
4 : //
5 : // Redistribution and use in source and binary forms, with or without
6 : // modification, are permitted provided that the following conditions are
7 : // met:
8 : //
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
14 : // distribution.
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.
18 : //
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.
30 :
31 : // Author: kenton@google.com (Kenton Varda)
32 : // Based on original Protocol Buffers design by
33 : // Sanjay Ghemawat, Jeff Dean, and others.
34 :
35 : #include <google/protobuf/compiler/javanano/javanano_field.h>
36 : #include <google/protobuf/compiler/javanano/javanano_helpers.h>
37 : #include <google/protobuf/compiler/javanano/javanano_primitive_field.h>
38 : #include <google/protobuf/compiler/javanano/javanano_enum_field.h>
39 : #include <google/protobuf/compiler/javanano/javanano_map_field.h>
40 : #include <google/protobuf/compiler/javanano/javanano_message_field.h>
41 : #include <google/protobuf/stubs/common.h>
42 :
43 : namespace google {
44 : namespace protobuf {
45 : namespace compiler {
46 : namespace javanano {
47 :
48 0 : FieldGenerator::~FieldGenerator() {}
49 :
50 0 : bool FieldGenerator::SavedDefaultNeeded() const {
51 : // No saved default for this field by default.
52 : // Subclasses whose instances may need saved defaults will override this
53 : // and return the appropriate value.
54 0 : return false;
55 : }
56 :
57 0 : void FieldGenerator::GenerateInitSavedDefaultCode(io::Printer* printer) const {
58 : // No saved default for this field by default.
59 : // Subclasses whose instances may need saved defaults will override this
60 : // and generate the appropriate init code to the printer.
61 0 : }
62 :
63 0 : void FieldGenerator::GenerateMergingCodeFromPacked(io::Printer* printer) const {
64 : // Reaching here indicates a bug. Cases are:
65 : // - This FieldGenerator should support packing, but this method should be
66 : // overridden.
67 : // - This FieldGenerator doesn't support packing, and this method should
68 : // never have been called.
69 0 : GOOGLE_LOG(FATAL) << "GenerateParsingCodeFromPacked() "
70 0 : << "called on field generator that does not support packing.";
71 0 : }
72 :
73 : // =============================================
74 :
75 0 : FieldGeneratorMap::FieldGeneratorMap(
76 0 : const Descriptor* descriptor, const Params ¶ms)
77 : : descriptor_(descriptor),
78 : field_generators_(
79 0 : new scoped_ptr<FieldGenerator>[descriptor->field_count()]) {
80 :
81 0 : int next_has_bit_index = 0;
82 0 : bool saved_defaults_needed = false;
83 : // Construct all the FieldGenerators.
84 0 : for (int i = 0; i < descriptor->field_count(); i++) {
85 : FieldGenerator* field_generator = MakeGenerator(
86 0 : descriptor->field(i), params, &next_has_bit_index);
87 : saved_defaults_needed = saved_defaults_needed
88 0 : || field_generator->SavedDefaultNeeded();
89 0 : field_generators_[i].reset(field_generator);
90 : }
91 0 : total_bits_ = next_has_bit_index;
92 0 : saved_defaults_needed_ = saved_defaults_needed;
93 0 : }
94 :
95 0 : FieldGenerator* FieldGeneratorMap::MakeGenerator(const FieldDescriptor* field,
96 0 : const Params ¶ms, int* next_has_bit_index) {
97 0 : JavaType java_type = GetJavaType(field);
98 0 : if (field->is_repeated()) {
99 0 : switch (java_type) {
100 : case JAVATYPE_MESSAGE:
101 0 : if (IsMapEntry(field->message_type())) {
102 0 : return new MapFieldGenerator(field, params);
103 : } else {
104 0 : return new RepeatedMessageFieldGenerator(field, params);
105 : }
106 : case JAVATYPE_ENUM:
107 0 : return new RepeatedEnumFieldGenerator(field, params);
108 : default:
109 0 : return new RepeatedPrimitiveFieldGenerator(field, params);
110 : }
111 0 : } else if (field->containing_oneof()) {
112 0 : switch (java_type) {
113 : case JAVATYPE_MESSAGE:
114 0 : return new MessageOneofFieldGenerator(field, params);
115 : case JAVATYPE_ENUM:
116 : default:
117 0 : return new PrimitiveOneofFieldGenerator(field, params);
118 : }
119 0 : } else if (params.optional_field_accessors() && field->is_optional()
120 0 : && java_type != JAVATYPE_MESSAGE) {
121 : // We need a has-bit for each primitive/enum field because their default
122 : // values could be same as explicitly set values. But we don't need it
123 : // for a message field because they have no defaults and Nano uses 'null'
124 : // for unset messages, which cannot be set explicitly.
125 0 : switch (java_type) {
126 : case JAVATYPE_ENUM:
127 : return new AccessorEnumFieldGenerator(
128 0 : field, params, (*next_has_bit_index)++);
129 : default:
130 : return new AccessorPrimitiveFieldGenerator(
131 0 : field, params, (*next_has_bit_index)++);
132 : }
133 : } else {
134 0 : switch (java_type) {
135 : case JAVATYPE_MESSAGE:
136 0 : return new MessageFieldGenerator(field, params);
137 : case JAVATYPE_ENUM:
138 0 : return new EnumFieldGenerator(field, params);
139 : default:
140 0 : return new PrimitiveFieldGenerator(field, params);
141 : }
142 : }
143 : }
144 :
145 0 : FieldGeneratorMap::~FieldGeneratorMap() {}
146 :
147 0 : const FieldGenerator& FieldGeneratorMap::get(
148 0 : const FieldDescriptor* field) const {
149 0 : GOOGLE_CHECK_EQ(field->containing_type(), descriptor_);
150 0 : return *field_generators_[field->index()];
151 : }
152 :
153 0 : void SetCommonOneofVariables(const FieldDescriptor* descriptor,
154 : map<string, string>* variables) {
155 0 : (*variables)["oneof_name"] =
156 : UnderscoresToCamelCase(descriptor->containing_oneof());
157 0 : (*variables)["oneof_capitalized_name"] =
158 : UnderscoresToCapitalizedCamelCase(descriptor->containing_oneof());
159 0 : (*variables)["oneof_index"] =
160 : SimpleItoa(descriptor->containing_oneof()->index());
161 0 : (*variables)["set_oneof_case"] =
162 0 : "this." + (*variables)["oneof_name"] +
163 0 : "Case_ = " + SimpleItoa(descriptor->number());
164 0 : (*variables)["clear_oneof_case"] =
165 0 : "this." + (*variables)["oneof_name"] + "Case_ = 0";
166 0 : (*variables)["has_oneof_case"] =
167 0 : "this." + (*variables)["oneof_name"] + "Case_ == " +
168 : SimpleItoa(descriptor->number());
169 0 : }
170 :
171 0 : void GenerateOneofFieldEquals(const FieldDescriptor* descriptor,
172 : const map<string, string>& variables,
173 : io::Printer* printer) {
174 0 : if (GetJavaType(descriptor) == JAVATYPE_BYTES) {
175 : printer->Print(variables,
176 : "if (this.has$capitalized_name$()) {\n"
177 : " if (!java.util.Arrays.equals((byte[]) this.$oneof_name$_,\n"
178 : " (byte[]) other.$oneof_name$_)) {\n"
179 : " return false;\n"
180 : " }\n"
181 0 : "}\n");
182 : } else {
183 : printer->Print(variables,
184 : "if (this.has$capitalized_name$()) {\n"
185 : " if (!this.$oneof_name$_.equals(other.$oneof_name$_)) {\n"
186 : " return false;\n"
187 : " }\n"
188 0 : "}\n");
189 : }
190 0 : }
191 :
192 0 : void GenerateOneofFieldHashCode(const FieldDescriptor* descriptor,
193 : const map<string, string>& variables,
194 : io::Printer* printer) {
195 0 : if (GetJavaType(descriptor) == JAVATYPE_BYTES) {
196 : printer->Print(variables,
197 : "result = 31 * result + ($has_oneof_case$\n"
198 0 : " ? java.util.Arrays.hashCode((byte[]) this.$oneof_name$_) : 0);\n");
199 : } else {
200 : printer->Print(variables,
201 : "result = 31 * result +\n"
202 0 : " ($has_oneof_case$ ? this.$oneof_name$_.hashCode() : 0);\n");
203 : }
204 0 : }
205 :
206 : } // namespace javanano
207 : } // namespace compiler
208 : } // namespace protobuf
209 : } // namespace google
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