I've got a class that looks something like.
public class ParseValue {
public String value;
public final Class classType;
}
And I'd like to make a function that does a conversion and returns a casted value.
public T parseValue(ParseValue parseInfo) {
if(parseInfo.classType == String.class) {
return parseInfo.value;
} else if (parseInfo.classType == Double.class) {
return Double.valueOf(parseInfo.value);
}
}
Right now I can have this function return an Object and then cast it upon getting the result, but is there a way to make the function do the cast based on the input ParseValue's classType field?
The safest way to do it is to make ParseValue generic:
public class ParseValue<T> {
public String value;
public final Class<T> classType;
public T parseValue() {
Object result;
if (classType == String.class) {
result = value;
} else if (classType == Double.class) {
result = Double.valueOf(value);
} else {
throw new RuntimeException("unknown value type");
}
return classType.cast(result);
}
}
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