feat: proper error handling

2 files changed, 69 insertions, 0 deletions

diff --git a/src/main/java/ftbsc/geb/exceptions/BadListenerArgumentsException.java b/src/main/java/ftbsc/geb/exceptions/BadListenerArgumentsException.java
new file mode 100644
index 0000000..a15b4e5
--- /dev/null
+++ b/src/main/java/ftbsc/geb/exceptions/BadListenerArgumentsException.java
@@ -0,0 +1,52 @@
+package ftbsc.geb.exceptions;
+
+/**
+ * Thrown when there is something wrong with a listener method.
+ */
+public class BadListenerArgumentsException extends RuntimeException {
+
+	/**
+	 * The constructor. It's not meant to be used as is, refer to the subclasses
+	 * @param message the message to pass along to the superclass
+	 */
+	protected BadListenerArgumentsException(String message) {
+		super(message);
+	}
+
+	/**
+	 * Thrown when the number of arguments is off.
+	 */
+	public static class Count extends BadListenerArgumentsException {
+
+		/**
+		 * The public constructor.
+		 * @param clazz the fully-qualified name of the parent class
+		 * @param method the annotated listener method
+		 * @param count the number of arguments found
+		 */
+		public Count(String clazz, String method, int count) {
+			super(String.format(
+				"An error occurred while evaluating method %s::%s: found %d arguments, expected 1!",
+				clazz, method, count));
+		}
+	}
+
+	/**
+	 * Thrown when the argument is of the wrong type.
+	 */
+	public static class Type extends BadListenerArgumentsException {
+
+		/**
+		 * The public constructor.
+		 * @param clazz the fully-qualified name of the parent class
+		 * @param method the annotated listener method
+		 * @param parameterName the name of the parameter
+		 */
+		public Type(String clazz, String method, String parameterName) {
+			super(String.format(
+				"The parameter %s of %s::%s does not implement the IEvent interface!",
+				parameterName, clazz, method
+			));
+		}
+	}
+}
diff --git a/src/main/java/ftbsc/geb/exceptions/MissingInterfaceException.java b/src/main/java/ftbsc/geb/exceptions/MissingInterfaceException.java
new file mode 100644
index 0000000..e792729
--- /dev/null
+++ b/src/main/java/ftbsc/geb/exceptions/MissingInterfaceException.java
@@ -0,0 +1,17 @@
+package ftbsc.geb.exceptions;
+
+/**
+ * Thrown when a parent of a listener method does not implement the
+ * appropriate interface,
+ */
+public class MissingInterfaceException extends RuntimeException {
+
+	/**
+	 * The public constructor.
+	 * @param clazz the fully-qualified name of the parent class
+	 * @param method the annotated listener method
+	 */
+	public MissingInterfaceException(String clazz, String method) {
+		super(String.format("The parent of %s::%s does not implement the IListener interface!", clazz, method));
+	}
+}