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java/src/main/java/com/jsoniter/CodegenImplArray.java at master · akan/java · GitHub
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jsoniter
/
CodegenImplArray.java
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/
jsoniter
/
CodegenImplArray.java
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package
com
.
jsoniter
;
import
java
.
lang
.
reflect
.
Type
;
import
java
.
util
.*;
class
CodegenImplArray
{
final
static
Set
<
Class
>
WITH_CAPACITY_COLLECTION_CLASSES
=
new
HashSet
<
Class
>() {{
add
(
ArrayList
.
class
);
add
(
HashSet
.
class
);
add
(
Vector
.
class
);
}};
public
static
String
genArray
(
Class
clazz
) {
Class
compType
=
clazz
.
getComponentType
();
if
(
compType
.
isArray
()) {
throw
new
IllegalArgumentException
(
"nested array not supported: "
+
clazz
.
getCanonicalName
());
}
StringBuilder
lines
=
new
StringBuilder
();
append
(
lines
,
"public static Object decode_(com.jsoniter.JsonIterator iter) {"
);
append
(
lines
,
"if (iter.readNull()) { return null; }"
);
append
(
lines
,
"if (!com.jsoniter.CodegenAccess.readArrayStart(iter)) {"
);
append
(
lines
,
"return new {{comp}}[0];"
);
append
(
lines
,
"}"
);
append
(
lines
,
"{{comp}} a1 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"return new {{comp}}[]{ a1 };"
);
append
(
lines
,
"}"
);
append
(
lines
,
"{{comp}} a2 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"return new {{comp}}[]{ a1, a2 };"
);
append
(
lines
,
"}"
);
append
(
lines
,
"{{comp}} a3 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"return new {{comp}}[]{ a1, a2, a3 };"
);
append
(
lines
,
"}"
);
append
(
lines
,
"{{comp}} a4 = ({{comp}}) {{op}};"
);
append
(
lines
,
"{{comp}}[] arr = new {{comp}}[8];"
);
append
(
lines
,
"arr[0] = a1;"
);
append
(
lines
,
"arr[1] = a2;"
);
append
(
lines
,
"arr[2] = a3;"
);
append
(
lines
,
"arr[3] = a4;"
);
append
(
lines
,
"int i = 4;"
);
append
(
lines
,
"while (com.jsoniter.CodegenAccess.nextToken(iter) == ',') {"
);
append
(
lines
,
"if (i == arr.length) {"
);
append
(
lines
,
"{{comp}}[] newArr = new {{comp}}[arr.length * 2];"
);
append
(
lines
,
"System.arraycopy(arr, 0, newArr, 0, arr.length);"
);
append
(
lines
,
"arr = newArr;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"arr[i++] = {{op}};"
);
append
(
lines
,
"}"
);
// append(lines, "if (c != ']') { com.jsoniter.CodegenAccess.reportIncompleteArray(iter); }");
append
(
lines
,
"{{comp}}[] result = new {{comp}}[i];"
);
append
(
lines
,
"System.arraycopy(arr, 0, result, 0, i);"
);
append
(
lines
,
"return result;"
);
append
(
lines
,
"}"
);
return
lines
.
toString
().
replace
(
"{{comp}}"
,
compType
.
getCanonicalName
()).
replace
(
"{{op}}"
,
CodegenImplNative
.
genReadOp
(
compType
));
}
public
static
String
genCollection
(
Class
clazz
,
Type
[]
typeArgs
) {
Type
compType
=
Object
.
class
;
if
(
typeArgs
.
length
==
0
) {
// default to List<Object>
}
else
if
(
typeArgs
.
length
==
1
) {
compType
=
typeArgs
[
0
];
}
else
{
throw
new
IllegalArgumentException
(
"can not bind to generic collection without argument types, "
+
"try syntax like TypeLiteral<List<Integer>>{}"
);
}
if
(
clazz
==
List
.
class
) {
clazz
=
ArrayList
.
class
;
}
else
if
(
clazz
==
Set
.
class
) {
clazz
=
HashSet
.
class
;
}
if
(
WITH_CAPACITY_COLLECTION_CLASSES
.
contains
(
clazz
)) {
return
CodegenImplArray
.
genCollectionWithCapacity
(
clazz
,
compType
);
}
else
{
return
CodegenImplArray
.
genCollectionWithoutCapacity
(
clazz
,
compType
);
}
}
private
static
String
genCollectionWithCapacity
(
Class
clazz
,
Type
compType
) {
StringBuilder
lines
=
new
StringBuilder
();
append
(
lines
,
"public static Object decode_(com.jsoniter.JsonIterator iter) {"
);
append
(
lines
,
"if (iter.readNull()) { return null; }"
);
append
(
lines
,
"{{clazz}} col = ({{clazz}})com.jsoniter.CodegenAccess.resetExistingObject(iter);"
);
append
(
lines
,
"if (!com.jsoniter.CodegenAccess.readArrayStart(iter)) {"
);
append
(
lines
,
"return col == null ? new {{clazz}}(0): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a1 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(1): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a2 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(2): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a3 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(3): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"obj.add(a3);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a4 = {{op}};"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(8): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"obj.add(a3);"
);
append
(
lines
,
"obj.add(a4);"
);
append
(
lines
,
"while (com.jsoniter.CodegenAccess.nextToken(iter) == ',') {"
);
append
(
lines
,
"obj.add({{op}});"
);
append
(
lines
,
"}"
);
// append(lines, "if (c != ']') { com.jsoniter.CodegenAccess.reportIncompleteArray(iter); }");
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
return
lines
.
toString
().
replace
(
"{{clazz}}"
,
clazz
.
getName
()).
replace
(
"{{op}}"
,
CodegenImplNative
.
genReadOp
(
compType
));
}
private
static
String
genCollectionWithoutCapacity
(
Class
clazz
,
Type
compType
) {
StringBuilder
lines
=
new
StringBuilder
();
append
(
lines
,
"public static Object decode_(com.jsoniter.JsonIterator iter) {"
);
append
(
lines
,
"if (iter.readNull()) { return null; }"
);
append
(
lines
,
"{{clazz}} col = ({{clazz}})com.jsoniter.CodegenAccess.resetExistingObject(iter);"
);
append
(
lines
,
"if (!com.jsoniter.CodegenAccess.readArrayStart(iter)) {"
);
append
(
lines
,
"return col == null ? new {{clazz}}(): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a1 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a2 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a3 = {{op}};"
);
append
(
lines
,
"if (com.jsoniter.CodegenAccess.nextToken(iter) != ',') {"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"obj.add(a3);"
);
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
append
(
lines
,
"Object a4 = {{op}};"
);
append
(
lines
,
"{{clazz}} obj = col == null ? new {{clazz}}(): ({{clazz}})com.jsoniter.CodegenAccess.reuseCollection(col);"
);
append
(
lines
,
"obj.add(a1);"
);
append
(
lines
,
"obj.add(a2);"
);
append
(
lines
,
"obj.add(a3);"
);
append
(
lines
,
"obj.add(a4);"
);
append
(
lines
,
"while (com.jsoniter.CodegenAccess.nextToken(iter) == ',') {"
);
append
(
lines
,
"obj.add({{op}});"
);
append
(
lines
,
"}"
);
// append(lines, "if (c != ']') { com.jsoniter.CodegenAccess.reportIncompleteArray(iter); }");
append
(
lines
,
"return obj;"
);
append
(
lines
,
"}"
);
return
lines
.
toString
().
replace
(
"{{clazz}}"
,
clazz
.
getName
()).
replace
(
"{{op}}"
,
CodegenImplNative
.
genReadOp
(
compType
));
}
private
static
void
append
(
StringBuilder
lines
,
String
str
) {
lines
.
append
(
str
);
lines
.
append
(
"
\n
"
);
}
}
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