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package io.dico.dicore.command.parameter.type;
import io.dico.dicore.command.CommandException;
import io.dico.dicore.command.annotation.Range;
import io.dico.dicore.command.parameter.ArgumentBuffer;
import io.dico.dicore.command.parameter.Parameter;
import org.bukkit.command.CommandSender;
/**
* Abstraction for number parameter types which use {@link Range.Memory} as parameter info.
*
* @param <T> the Number subclass.
*/
public abstract class NumberParameterType<T extends Number> extends ParameterType<T, Range.Memory> {
public NumberParameterType(Class<T> returnType) {
super(returnType, Range.CONFIG);
}
protected abstract T parse(String input) throws NumberFormatException;
protected abstract T select(Number number);
@Override
public T parse(Parameter<T, Range.Memory> parameter, CommandSender sender, ArgumentBuffer buffer) throws CommandException {
//System.out.println("In NumberParameterType:parse() for class " + getReturnType().toGenericString());
String input = buffer.next();
if (input == null) {
throw CommandException.missingArgument(parameter.getName());
}
T result;
try {
result = parse(input);
} catch (Exception ex) {
throw CommandException.invalidArgument(parameter.getName(), "a number");
}
Range.Memory memory = (Range.Memory) parameter.getParamInfo();
if (memory != null) {
memory.validate(result, "Argument " + parameter.getName() + " is out of range ["
+ select(memory.min()) + ", " + select(memory.max()) + "]: " + result);
}
return result;
}
@Override
public T getDefaultValue(Parameter<T, Range.Memory> parameter, CommandSender sender, ArgumentBuffer buffer) throws CommandException {
Range.Memory memory = (Range.Memory) parameter.getParamInfo();
if (memory != null) return select(memory.defaultValue());
return !parameter.isPrimitive() ? null : select(0);
}
}
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