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ReflectionMapDecoder.java
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54 lines (47 loc) · 1.58 KB
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package com.jsoniter;
import com.jsoniter.spi.Decoder;
import com.jsoniter.spi.JsonException;
import com.jsoniter.spi.TypeLiteral;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Type;
import java.util.Map;
class ReflectionMapDecoder implements Decoder {
private final Constructor ctor;
private final TypeLiteral valueTypeLiteral;
public ReflectionMapDecoder(Class clazz, Type[] typeArgs) {
try {
ctor = clazz.getConstructor();
} catch (NoSuchMethodException e) {
throw new JsonException(e);
}
valueTypeLiteral = TypeLiteral.create(typeArgs[1]);
}
@Override
public Object decode(JsonIterator iter) throws IOException {
try {
return decode_(iter);
} catch (Exception e) {
throw new JsonException(e);
}
}
private Object decode_(JsonIterator iter) throws Exception {
Map map = (Map) CodegenAccess.resetExistingObject(iter);
if (iter.readNull()) {
return null;
}
if (map == null) {
map = (Map) ctor.newInstance();
}
if (!CodegenAccess.readObjectStart(iter)) {
return map;
}
String field = CodegenAccess.readObjectFieldAsString(iter);
map.put(field, CodegenAccess.read(iter, valueTypeLiteral));
while (CodegenAccess.nextToken(iter) == ',') {
field = CodegenAccess.readObjectFieldAsString(iter);
map.put(field, CodegenAccess.read(iter, valueTypeLiteral));
}
return map;
}
}