1 files changed, 55 insertions, 0 deletions
diff --git a/dicore3/command/src/main/java/io/dico/dicore/command/parameter/type/NumberParameterType.java b/dicore3/command/src/main/java/io/dico/dicore/command/parameter/type/NumberParameterType.java
new file mode 100644
index 0000000..ed53cb0
--- /dev/null
+++ b/dicore3/command/src/main/java/io/dico/dicore/command/parameter/type/NumberParameterType.java
@@ -0,0 +1,55 @@
+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();
+        return select(memory != null ? memory.defaultValue() : 0);
+    }
+
+}