SEAMVALIDATE-17: Making ValidationInterceptor serializable

impl/src/main/java/org/jboss/seam/validation/ValidationInterceptor.java

@@ -19,6 +19,7 @@
  */
 package org.jboss.seam.validation;
 
+import java.io.Serializable;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.Set;
@@ -33,13 +34,37 @@
 import org.hibernate.validator.method.MethodConstraintViolationException;
 import org.hibernate.validator.method.MethodValidator;
 
+/**
+ * An interceptor which performs a validation of the Bean Validation constraints specified at the parameters and/or return
+ * values of intercepted methods using the method validation functionality provided by Hibernate Validator.
+ * 
+ * 
+ * @author Gunnar Morling
+ */
 @AutoValidating
 @Interceptor
-public class ValidationInterceptor {
+public class ValidationInterceptor implements Serializable {
+
+    private static final long serialVersionUID = 604440259030722151L;
 
+    /**
+     * The validator to be used for method validation.
+     * 
+     * Although the concrete validator is not necessarily serializable (and HV's implementation indeed isn't) it is still
+     * alright to have it as non-transient field here. Upon passivation not the validator itself will be serialized, but the
+     * proxy injected here, which in turn is serializable.
+     */
     @Inject
     private Validator validator;
 
+    /**
+     * Validates the Bean Validation constraints specified at the parameters and/or return value of the intercepted method.
+     * 
+     * @param ctx The context of the intercepted method invocation.
+     * @return The result of the method invocation.
+     * @throws Exception Any exception caused by the intercepted method invocation. A {@link MethodConstraintViolationException}
+     *         in case at least one constraint violation occurred either during parameter or return value validation.
+     */
     @AroundInvoke
     public Object validateMethodInvocation(InvocationContext ctx) throws Exception {