1 files changed, 42 insertions, 0 deletions
diff --git a/ri/src/main/java/javax/annotation/RegEx.java b/ri/src/main/java/javax/annotation/RegEx.java
new file mode 100644
index 0000000..21697a7
--- /dev/null
+++ b/ri/src/main/java/javax/annotation/RegEx.java
@@ -0,0 +1,42 @@
+package javax.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+
+import javax.annotation.meta.TypeQualifierNickname;
+import javax.annotation.meta.TypeQualifierValidator;
+import javax.annotation.meta.When;
+
+/**
+ * This qualifier is used to denote String values that should be a Regular
+ * expression.
+ * 
+ */
+@Documented
+@Syntax("RegEx")
+@TypeQualifierNickname
+@Retention(RetentionPolicy.RUNTIME)
+public @interface RegEx {
+    When when() default When.ALWAYS;
+
+    static class Checker implements TypeQualifierValidator<RegEx> {
+
+        public When forConstantValue(RegEx annotation, Object value) {
+            if (!(value instanceof String))
+                return When.NEVER;
+
+            try {
+                Pattern.compile((String) value);
+            } catch (PatternSyntaxException e) {
+                return When.NEVER;
+            }
+            return When.ALWAYS;
+
+        }
+
+    }
+
+}