forked from json-iterator/java
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathCodegen.java
More file actions
204 lines (188 loc) · 7.5 KB
/
Codegen.java
File metadata and controls
204 lines (188 loc) · 7.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
package com.jsoniter.output;
import com.jsoniter.JsonException;
import com.jsoniter.spi.Encoder;
import com.jsoniter.spi.Extension;
import com.jsoniter.spi.JsoniterSpi;
import com.jsoniter.spi.TypeLiteral;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.*;
class Codegen {
private static EncodingMode mode = EncodingMode.REFLECTION_MODE;
static boolean isDoingStaticCodegen;
// only read/write when generating code with synchronized protection
private final static Set<String> generatedClassNames = new HashSet<String>();
private volatile static Map<String, Encoder> reflectionEncoders = new HashMap<String, Encoder>();
static {
String envMode = System.getenv("JSONITER_ENCODING_MODE");
if (envMode != null) {
mode = EncodingMode.valueOf(envMode);
}
}
public static void setMode(EncodingMode mode) {
Codegen.mode = mode;
}
public static Encoder getReflectionEncoder(String cacheKey, Type type) {
Encoder encoder = CodegenImplNative.NATIVE_ENCODERS.get(type);
if (encoder != null) {
return encoder;
}
encoder = reflectionEncoders.get(cacheKey);
if (encoder != null) {
return encoder;
}
synchronized (Codegen.class) {
encoder = reflectionEncoders.get(cacheKey);
if (encoder != null) {
return encoder;
}
Type[] typeArgs = new Type[0];
Class clazz;
if (type instanceof ParameterizedType) {
ParameterizedType pType = (ParameterizedType) type;
clazz = (Class) pType.getRawType();
typeArgs = pType.getActualTypeArguments();
} else {
clazz = (Class) type;
}
encoder = ReflectionEncoderFactory.create(clazz, typeArgs);
HashMap<String, Encoder> copy = new HashMap<String, Encoder>(reflectionEncoders);
copy.put(cacheKey, encoder);
reflectionEncoders = copy;
return encoder;
}
}
public static Encoder getEncoder(String cacheKey, Type type) {
Encoder encoder = JsoniterSpi.getEncoder(cacheKey);
if (encoder != null) {
return encoder;
}
return gen(cacheKey, type);
}
private static synchronized Encoder gen(String cacheKey, Type type) {
Encoder encoder = JsoniterSpi.getEncoder(cacheKey);
if (encoder != null) {
return encoder;
}
List<Extension> extensions = JsoniterSpi.getExtensions();
for (Extension extension : extensions) {
encoder = extension.createEncoder(cacheKey, type);
if (encoder != null) {
JsoniterSpi.addNewEncoder(cacheKey, encoder);
return encoder;
}
}
encoder = CodegenImplNative.NATIVE_ENCODERS.get(type);
if (encoder != null) {
JsoniterSpi.addNewEncoder(cacheKey, encoder);
return encoder;
}
Type[] typeArgs = new Type[0];
Class clazz;
if (type instanceof ParameterizedType) {
ParameterizedType pType = (ParameterizedType) type;
clazz = (Class) pType.getRawType();
typeArgs = pType.getActualTypeArguments();
} else {
clazz = (Class) type;
}
if (mode == EncodingMode.REFLECTION_MODE) {
encoder = ReflectionEncoderFactory.create(clazz, typeArgs);
JsoniterSpi.addNewEncoder(cacheKey, encoder);
return encoder;
}
try {
encoder = (Encoder) Class.forName(cacheKey).newInstance();
JsoniterSpi.addNewEncoder(cacheKey, encoder);
return encoder;
} catch (Exception e) {
if (mode == EncodingMode.STATIC_MODE) {
throw new JsonException("static gen should provide the encoder we need, but failed to create the encoder", e);
}
}
String source = genSource(clazz, typeArgs);
if ("true".equals(System.getenv("JSONITER_DEBUG"))) {
System.out.println(">>> " + cacheKey);
System.out.println(source);
}
try {
generatedClassNames.add(cacheKey);
if (isDoingStaticCodegen) {
staticGen(clazz, cacheKey, source);
} else {
encoder = DynamicCodegen.gen(clazz, cacheKey, source);
}
JsoniterSpi.addNewEncoder(cacheKey, encoder);
return encoder;
} catch (Exception e) {
System.err.println("failed to generate encoder for: " + type + " with " + Arrays.toString(typeArgs) + ", exception: " + e);
System.err.println(source);
JsoniterSpi.dump();
throw new JsonException(e);
}
}
public static boolean canStaticAccess(String cacheKey) {
return generatedClassNames.contains(cacheKey);
}
private static void staticGen(Class clazz, String cacheKey, String source) throws IOException {
createDir(cacheKey);
String fileName = cacheKey.replace('.', '/') + ".java";
FileOutputStream fileOutputStream = new FileOutputStream(fileName);
try {
OutputStreamWriter writer = new OutputStreamWriter(fileOutputStream);
try {
staticGen(clazz, cacheKey, writer, source);
} finally {
writer.close();
}
} finally {
fileOutputStream.close();
}
}
private static void staticGen(Class clazz, String cacheKey, OutputStreamWriter writer, String source) throws IOException {
String className = cacheKey.substring(cacheKey.lastIndexOf('.') + 1);
String packageName = cacheKey.substring(0, cacheKey.lastIndexOf('.'));
writer.write("package " + packageName + ";\n");
writer.write("public class " + className + " extends com.jsoniter.spi.EmptyEncoder {\n");
writer.write(source);
writer.write("public void encode(java.lang.Object obj, com.jsoniter.output.JsonStream stream) throws java.io.IOException {\n");
writer.write(String.format("encode_((%s)obj, stream);\n", clazz.getCanonicalName()));
writer.write("}\n");
writer.write("}\n");
}
private static void createDir(String cacheKey) {
String[] parts = cacheKey.split("\\.");
File parent = new File(".");
for (int i = 0; i < parts.length - 1; i++) {
String part = parts[i];
File current = new File(parent, part);
current.mkdir();
parent = current;
}
}
private static String genSource(Class clazz, Type[] typeArgs) {
if (clazz.isArray()) {
return CodegenImplArray.genArray(clazz);
}
if (Map.class.isAssignableFrom(clazz)) {
return CodegenImplMap.genMap(clazz, typeArgs);
}
if (Collection.class.isAssignableFrom(clazz)) {
return CodegenImplArray.genCollection(clazz, typeArgs);
}
if (clazz.isEnum()) {
return CodegenImplNative.genEnum(clazz);
}
return CodegenImplObject.genObject(clazz);
}
public static void staticGenEncoders(TypeLiteral[] typeLiterals) {
isDoingStaticCodegen = true;
for (TypeLiteral typeLiteral : typeLiterals) {
gen(typeLiteral.getEncoderCacheKey(), typeLiteral.getType());
}
}
}