STR-3168: Add serialization UID

git-svn-id: https://svn.apache.org/repos/asf/struts/struts1/trunk@721373 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/core/src/main/java/org/apache/struts/dispatcher/AbstractMappingDispatcher.java b/core/src/main/java/org/apache/struts/dispatcher/AbstractMappingDispatcher.java
index d7e5c14..72c0b74 100644
--- a/core/src/main/java/org/apache/struts/dispatcher/AbstractMappingDispatcher.java
+++ b/core/src/main/java/org/apache/struts/dispatcher/AbstractMappingDispatcher.java
@@ -24,8 +24,9 @@
 import org.apache.struts.chain.contexts.ActionContext;
 
 /**
- * This abstract class is a template for choosing the target method based on the
- * <code>parameter</code> attribute of the {@link ActionMapping}.
+ * This abstract class is a template for choosing the target method that is
+ * named by the <code>parameter</code> attribute of the corresponding
+ * {@link ActionMapping}.
  * 
  * @version $Rev$
  * @since Struts 1.4
diff --git a/core/src/main/java/org/apache/struts/dispatcher/AbstractParameterDispatcher.java b/core/src/main/java/org/apache/struts/dispatcher/AbstractParameterDispatcher.java
index f08ab10..1721dab 100644
--- a/core/src/main/java/org/apache/struts/dispatcher/AbstractParameterDispatcher.java
+++ b/core/src/main/java/org/apache/struts/dispatcher/AbstractParameterDispatcher.java
@@ -23,8 +23,8 @@
 import org.apache.struts.chain.contexts.ActionContext;
 
 /**
- * This abstract class is a template for choosing the target method based on a
- * servlet request parameter.
+ * This abstract class is a template for choosing the target method that is
+ * identified by a submission parameter.
  * 
  * @version $Rev$
  * @since Struts 1.4
diff --git a/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletMappingDispatcher.java b/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletMappingDispatcher.java
index 866bd27..91f98b1 100644
--- a/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletMappingDispatcher.java
+++ b/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletMappingDispatcher.java
@@ -101,6 +101,8 @@
  */
 public class ServletMappingDispatcher extends AbstractMappingDispatcher {
 
+    private static final long serialVersionUID = 1L;
+
     protected Object[] buildMethodArguments(ActionContext context, Method method) {
 	return ServletDispatchUtils.buildClassicExecuteArguments((ServletActionContext) context);
     }
diff --git a/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletParameterDispatcher.java b/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletParameterDispatcher.java
index d0af989..e4d6f32 100644
--- a/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletParameterDispatcher.java
+++ b/core/src/main/java/org/apache/struts/dispatcher/servlet/ServletParameterDispatcher.java
@@ -73,6 +73,8 @@
  */
 public class ServletParameterDispatcher extends AbstractParameterDispatcher {
 
+    private static final long serialVersionUID = 1L;
+
     protected Object[] buildMethodArguments(ActionContext context, Method method) {
 	return ServletDispatchUtils.buildClassicExecuteArguments((ServletActionContext) context);
     }