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java/src/main/java/com/jsoniter/CodegenImplNative.java at master · akan/java · GitHub
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jsoniter
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CodegenImplNative.java
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package
com
.
jsoniter
;
import
java
.
lang
.
reflect
.
ParameterizedType
;
import
java
.
lang
.
reflect
.
Type
;
import
java
.
math
.
BigDecimal
;
import
java
.
math
.
BigInteger
;
import
java
.
util
.
HashMap
;
import
java
.
util
.
Map
;
class
CodegenImplNative
{
final
static
Map
<
String
,
String
>
NATIVE_READS
=
new
HashMap
<
String
,
String
>() {{
put
(
"float"
,
"iter.readFloat()"
);
put
(
"double"
,
"iter.readDouble()"
);
put
(
"boolean"
,
"iter.readBoolean()"
);
put
(
"byte"
,
"iter.readShort()"
);
put
(
"short"
,
"iter.readShort()"
);
put
(
"int"
,
"iter.readInt()"
);
put
(
"char"
,
"iter.readInt()"
);
put
(
"long"
,
"iter.readLong()"
);
put
(
Float
.
class
.
getName
(),
"Float.valueOf(iter.readFloat())"
);
put
(
Double
.
class
.
getName
(),
"Double.valueOf(iter.readDouble())"
);
put
(
Boolean
.
class
.
getName
(),
"Boolean.valueOf(iter.readBoolean())"
);
put
(
Byte
.
class
.
getName
(),
"Byte.valueOf((byte)iter.readShort())"
);
put
(
Character
.
class
.
getName
(),
"Character.valueOf((char)iter.readShort())"
);
put
(
Short
.
class
.
getName
(),
"Short.valueOf(iter.readShort())"
);
put
(
Integer
.
class
.
getName
(),
"Integer.valueOf(iter.readInt())"
);
put
(
Long
.
class
.
getName
(),
"Long.valueOf(iter.readLong())"
);
put
(
BigDecimal
.
class
.
getName
(),
"iter.readBigDecimal()"
);
put
(
BigInteger
.
class
.
getName
(),
"iter.readBigInteger()"
);
put
(
String
.
class
.
getName
(),
"iter.readString()"
);
put
(
Object
.
class
.
getName
(),
"iter.readAnyObject()"
);
put
(
Any
.
class
.
getName
(),
"iter.readAny()"
);
}};
public
static
String
genNative
(
String
nativeReadKey
) {
if
(
"boolean"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Boolean
.
class
.
getName
();
}
else
if
(
"byte"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Byte
.
class
.
getName
();
}
else
if
(
"char"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Character
.
class
.
getName
();
}
else
if
(
"short"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Short
.
class
.
getName
();
}
else
if
(
"int"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Integer
.
class
.
getName
();
}
else
if
(
"long"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Long
.
class
.
getName
();
}
else
if
(
"float"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Float
.
class
.
getName
();
}
else
if
(
"double"
.
equals
(
nativeReadKey
)) {
nativeReadKey
=
Double
.
class
.
getName
();
}
String
op
=
NATIVE_READS
.
get
(
nativeReadKey
);
if
(
op
==
null
) {
throw
new
RuntimeException
(
"do not know how to read: "
+
nativeReadKey
);
}
StringBuilder
lines
=
new
StringBuilder
();
append
(
lines
,
"public static Object decode_(com.jsoniter.JsonIterator iter) {"
);
append
(
lines
,
"return "
+
op
+
";"
);
append
(
lines
,
"}"
);
return
lines
.
toString
();
}
public
static
String
genReadOp
(
Type
type
) {
if
(
type
instanceof
Class
) {
Class
clazz
= (
Class
)
type
;
String
nativeRead
=
NATIVE_READS
.
get
(
clazz
.
getCanonicalName
());
if
(
nativeRead
!=
null
) {
return
nativeRead
;
}
}
String
cacheKey
=
TypeLiteral
.
generateDecoderCacheKey
(
type
);
Decoder
decoder
=
Codegen
.
getDecoder
(
cacheKey
,
type
);
// set the decoder to cache
if
(
cacheKey
.
equals
(
decoder
.
getClass
().
getCanonicalName
())) {
return
String
.
format
(
"%s.decode_(iter)"
,
cacheKey
);
}
else
{
// can not use static "decode_" method to access, go through codegen cache
return
String
.
format
(
"com.jsoniter.CodegenAccess.read(
\"
%s
\"
, iter);"
,
cacheKey
);
}
}
public
static
String
genField
(
Binding
field
,
String
cacheKey
) {
String
fieldCacheKey
=
field
.
name
+
"@"
+
cacheKey
;
if
(
field
.
decoder
!=
null
) {
Codegen
.
cache
.
put
(
fieldCacheKey
,
field
.
decoder
);
}
// the field decoder might be registered directly
Decoder
decoder
=
Codegen
.
cache
.
get
(
fieldCacheKey
);
Type
fieldType
=
field
.
valueType
;
if
(
decoder
==
null
) {
return
String
.
format
(
"(%s)%s"
,
getTypeName
(
fieldType
),
CodegenImplNative
.
genReadOp
(
fieldType
));
}
if
(
fieldType
==
boolean
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
BooleanDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.BooleanDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readBoolean(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
byte
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
ShortDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.ShortDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readShort(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
short
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
ShortDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.ShortDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readShort(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
char
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
IntDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.IntDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readInt(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
int
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
IntDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.IntDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readInt(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
long
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
LongDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.LongDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readLong(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
float
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
FloatDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.FloatDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readFloat(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
if
(
fieldType
==
double
.
class
) {
if
(!(
decoder
instanceof
Decoder
.
DoubleDecoder
)) {
throw
new
RuntimeException
(
"decoder for field "
+
field
+
"must implement Decoder.DoubleDecoder"
);
}
return
String
.
format
(
"com.jsoniter.CodegenAccess.readDouble(
\"
%s
\"
, iter)"
,
fieldCacheKey
);
}
Codegen
.
getDecoder
(
fieldCacheKey
,
fieldType
);
// put decoder into cache
return
String
.
format
(
"(%s)com.jsoniter.CodegenAccess.read(
\"
%s
\"
, iter);"
,
getTypeName
(
fieldType
),
fieldCacheKey
);
}
public
static
String
getTypeName
(
Type
fieldType
) {
if
(
fieldType
instanceof
Class
) {
Class
clazz
= (
Class
)
fieldType
;
return
clazz
.
getCanonicalName
();
}
else
if
(
fieldType
instanceof
ParameterizedType
) {
ParameterizedType
pType
= (
ParameterizedType
)
fieldType
;
Class
clazz
= (
Class
)
pType
.
getRawType
();
return
clazz
.
getCanonicalName
();
}
else
{
throw
new
RuntimeException
(
"unsupported type: "
+
fieldType
);
}
}
private
static
void
append
(
StringBuilder
lines
,
String
str
) {
lines
.
append
(
str
);
lines
.
append
(
"
\n
"
);
}
public
static
boolean
isNative
(
Type
valueType
) {
if
(
valueType
instanceof
Class
) {
Class
clazz
= (
Class
)
valueType
;
return
NATIVE_READS
.
containsKey
(
clazz
.
getCanonicalName
());
}
return
false
;
}
}
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