如何将值解析为适当的目标类型

Question

I have a method which has a two parameters value:Object and initialValueType:String.

public Object parseValueForInitialValueType(Object value, String initialValueType) {
    Class<?> clazz = Class.forName(initialValueType);
    Constructor<?> constructor = clazz.getConstructor(String.class);
    return constructor.newInstance(value);
}

This parameters may have following values:

value -> "test":String; initialValueType -> "java.lang.String"; method output -> "test":String
value -> 123.0:Double; initialValueType -> "java.lang.Double"; method output -> 123.0:Double
value -> "456.0":String; initialValueType -> "java.lang.Double"; method output -> "426.0:Double
value -> "123.000":String; initialValueType -> "java.math.BigDecimal"; method output -> 123.000:BigDecimal

Issue is that, I get exception:

Exception in thread "main" java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

How can I parse value into desired initialValueType?

Basically, I want to construct a new object for initialValueType.

Answer 1

Seems like solution:

public Object parseValueForInitialValueType(Object value, String initialValueType) {
    Class<?> clazz = Class.forName(initialValueType);
    Constructor<?> constructor = clazz.getConstructor(String.class);
    return constructor.newInstance(String.valueOf(value));
}