1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
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: [email protected] (Kenton Varda)
32 // Based on original Protocol Buffers design by
33 // Sanjay Ghemawat, Jeff Dean, and others.
34
35 #include <google/protobuf/compiler/java/enum_lite.h>
36
37 #include <map>
38 #include <string>
39
40 #include <google/protobuf/io/printer.h>
41 #include <google/protobuf/stubs/strutil.h>
42 #include <google/protobuf/compiler/java/context.h>
43 #include <google/protobuf/compiler/java/doc_comment.h>
44 #include <google/protobuf/compiler/java/helpers.h>
45 #include <google/protobuf/compiler/java/name_resolver.h>
46 #include <google/protobuf/descriptor.pb.h>
47 #include <google/protobuf/stubs/map_util.h>
48
49 namespace google {
50 namespace protobuf {
51 namespace compiler {
52 namespace java {
53
EnumLiteGenerator(const EnumDescriptor * descriptor,bool immutable_api,Context * context)54 EnumLiteGenerator::EnumLiteGenerator(const EnumDescriptor* descriptor,
55 bool immutable_api, Context* context)
56 : descriptor_(descriptor),
57 immutable_api_(immutable_api),
58 context_(context),
59 name_resolver_(context->GetNameResolver()) {
60 for (int i = 0; i < descriptor_->value_count(); i++) {
61 const EnumValueDescriptor* value = descriptor_->value(i);
62 const EnumValueDescriptor* canonical_value =
63 descriptor_->FindValueByNumber(value->number());
64
65 if (value == canonical_value) {
66 canonical_values_.push_back(value);
67 } else {
68 Alias alias;
69 alias.value = value;
70 alias.canonical_value = canonical_value;
71 aliases_.push_back(alias);
72 }
73 }
74 }
75
~EnumLiteGenerator()76 EnumLiteGenerator::~EnumLiteGenerator() {}
77
Generate(io::Printer * printer)78 void EnumLiteGenerator::Generate(io::Printer* printer) {
79 WriteEnumDocComment(printer, descriptor_);
80 MaybePrintGeneratedAnnotation(context_, printer, descriptor_, immutable_api_);
81 printer->Print(
82 "$deprecation$public enum $classname$\n"
83 " implements com.google.protobuf.Internal.EnumLite {\n",
84 "classname", descriptor_->name(), "deprecation",
85 descriptor_->options().deprecated() ? "@java.lang.Deprecated " : "");
86 printer->Annotate("classname", descriptor_);
87 printer->Indent();
88
89 for (int i = 0; i < canonical_values_.size(); i++) {
90 std::map<std::string, std::string> vars;
91 vars["name"] = canonical_values_[i]->name();
92 vars["number"] = StrCat(canonical_values_[i]->number());
93 WriteEnumValueDocComment(printer, canonical_values_[i]);
94 if (canonical_values_[i]->options().deprecated()) {
95 printer->Print("@java.lang.Deprecated\n");
96 }
97 printer->Print(vars, "$name$($number$),\n");
98 printer->Annotate("name", canonical_values_[i]);
99 }
100
101 if (SupportUnknownEnumValue(descriptor_->file())) {
102 printer->Print("${$UNRECOGNIZED$}$(-1),\n", "{", "", "}", "");
103 printer->Annotate("{", "}", descriptor_);
104 }
105
106 printer->Print(
107 ";\n"
108 "\n");
109
110 // -----------------------------------------------------------------
111
112 for (int i = 0; i < aliases_.size(); i++) {
113 std::map<std::string, std::string> vars;
114 vars["classname"] = descriptor_->name();
115 vars["name"] = aliases_[i].value->name();
116 vars["canonical_name"] = aliases_[i].canonical_value->name();
117 WriteEnumValueDocComment(printer, aliases_[i].value);
118 printer->Print(
119 vars, "public static final $classname$ $name$ = $canonical_name$;\n");
120 printer->Annotate("name", aliases_[i].value);
121 }
122
123 for (int i = 0; i < descriptor_->value_count(); i++) {
124 std::map<std::string, std::string> vars;
125 vars["name"] = descriptor_->value(i)->name();
126 vars["number"] = StrCat(descriptor_->value(i)->number());
127 vars["{"] = "";
128 vars["}"] = "";
129 vars["deprecation"] = descriptor_->value(i)->options().deprecated()
130 ? "@java.lang.Deprecated "
131 : "";
132 WriteEnumValueDocComment(printer, descriptor_->value(i));
133 printer->Print(vars,
134 "$deprecation$public static final int ${$$name$_VALUE$}$ = "
135 "$number$;\n");
136 printer->Annotate("{", "}", descriptor_->value(i));
137 }
138 printer->Print("\n");
139
140 // -----------------------------------------------------------------
141
142 printer->Print(
143 "\n"
144 "@java.lang.Override\n"
145 "public final int getNumber() {\n");
146 if (SupportUnknownEnumValue(descriptor_->file())) {
147 printer->Print(
148 " if (this == UNRECOGNIZED) {\n"
149 " throw new java.lang.IllegalArgumentException(\n"
150 " \"Can't get the number of an unknown enum value.\");\n"
151 " }\n");
152 }
153 printer->Print(
154 " return value;\n"
155 "}\n"
156 "\n"
157 "/**\n"
158 " * @param value The number of the enum to look for.\n"
159 " * @return The enum associated with the given number.\n"
160 " * @deprecated Use {@link #forNumber(int)} instead.\n"
161 " */\n"
162 "@java.lang.Deprecated\n"
163 "public static $classname$ valueOf(int value) {\n"
164 " return forNumber(value);\n"
165 "}\n"
166 "\n"
167 "public static $classname$ forNumber(int value) {\n"
168 " switch (value) {\n",
169 "classname", descriptor_->name());
170 printer->Indent();
171 printer->Indent();
172
173 for (int i = 0; i < canonical_values_.size(); i++) {
174 printer->Print("case $number$: return $name$;\n", "name",
175 canonical_values_[i]->name(), "number",
176 StrCat(canonical_values_[i]->number()));
177 }
178
179 printer->Outdent();
180 printer->Outdent();
181 printer->Print(
182 " default: return null;\n"
183 " }\n"
184 "}\n"
185 "\n"
186 "public static com.google.protobuf.Internal.EnumLiteMap<$classname$>\n"
187 " internalGetValueMap() {\n"
188 " return internalValueMap;\n"
189 "}\n"
190 "private static final com.google.protobuf.Internal.EnumLiteMap<\n"
191 " $classname$> internalValueMap =\n"
192 " new com.google.protobuf.Internal.EnumLiteMap<$classname$>() {\n"
193 " @java.lang.Override\n"
194 " public $classname$ findValueByNumber(int number) {\n"
195 " return $classname$.forNumber(number);\n"
196 " }\n"
197 " };\n"
198 "\n"
199 "public static com.google.protobuf.Internal.EnumVerifier \n"
200 " internalGetVerifier() {\n"
201 " return $classname$Verifier.INSTANCE;\n"
202 "}\n"
203 "\n"
204 "private static final class $classname$Verifier implements \n"
205 " com.google.protobuf.Internal.EnumVerifier { \n"
206 " static final com.google.protobuf.Internal.EnumVerifier "
207 " INSTANCE = new $classname$Verifier();\n"
208 " @java.lang.Override\n"
209 " public boolean isInRange(int number) {\n"
210 " return $classname$.forNumber(number) != null;\n"
211 " }\n"
212 " };\n"
213 "\n",
214 "classname", descriptor_->name());
215
216 printer->Print(
217 "private final int value;\n\n"
218 "private $classname$(int value) {\n",
219 "classname", descriptor_->name());
220 printer->Print(
221 " this.value = value;\n"
222 "}\n");
223
224 printer->Print(
225 "\n"
226 "// @@protoc_insertion_point(enum_scope:$full_name$)\n",
227 "full_name", descriptor_->full_name());
228
229 printer->Outdent();
230 printer->Print("}\n\n");
231 }
232
233 } // namespace java
234 } // namespace compiler
235 } // namespace protobuf
236 } // namespace google
237