From 05951450cc7059a2fdf32b6c26a68408d52f8c33 Mon Sep 17 00:00:00 2001
From: "Brian S. O'Neill" <bronee@gmail.com>
Date: Thu, 1 Jan 2009 16:50:56 +0000
Subject: Add utility to concat exception message at runtime.
---
.../com/amazon/carbonado/gen/CodeBuilderUtil.java | 34 ++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/src/main/java/com/amazon/carbonado/gen/CodeBuilderUtil.java b/src/main/java/com/amazon/carbonado/gen/CodeBuilderUtil.java
index f25d6f1..7fad91f 100644
--- a/src/main/java/com/amazon/carbonado/gen/CodeBuilderUtil.java
+++ b/src/main/java/com/amazon/carbonado/gen/CodeBuilderUtil.java
@@ -99,6 +99,40 @@ public class CodeBuilderUtil {
b.throwObject();
}
+ /**
+ * Generate code to throw an exception with a message concatenated at runtime.
+ *
+ * @param b {@link CodeBuilder} to which to add code
+ * @param type type of the object to throw
+ * @param messages messages to concat at runtime
+ */
+ public static void throwConcatException(CodeBuilder b, Class type, String... messages) {
+ if (messages == null || messages.length == 0) {
+ throwException(b, type, null);
+ return;
+ }
+ if (messages.length == 1) {
+ throwException(b, type, messages[0]);
+ return;
+ }
+
+ TypeDesc desc = TypeDesc.forClass(type);
+ b.newObject(desc);
+ b.dup();
+
+ TypeDesc[] params = new TypeDesc[] {TypeDesc.STRING};
+
+ for (int i=0; i<messages.length; i++) {
+ b.loadConstant(String.valueOf(messages[i]));
+ if (i > 0) {
+ b.invokeVirtual(TypeDesc.STRING, "concat", TypeDesc.STRING, params);
+ }
+ }
+
+ b.invokeConstructor(desc, params);
+ b.throwObject();
+ }
+
/**
* Collect a set of all the interfaces and recursively all superclasses for the leaf
* (genericised class) and root (genericised base class). Eg, for Object<foo>, all
--
cgit v1.2.3