X-Git-Url: https://juplo.de/gitweb/?p=hibernate4-maven-plugin;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fplugins%2Fhibernate4%2FHbm2DdlMojo.java;h=2e232bf1cbb7080be6f917bfc85ae2296e865acb;hp=6c4c31a4ed51068a57e1e1834ce6841c5caa0dd8;hb=d38b2386641c7ca00f54d69cb3f576c20b0cdccc;hpb=caa492b70dc1daeaef436748db38df1c19554943

diff --git a/src/main/java/de/juplo/plugins/hibernate4/Hbm2DdlMojo.java b/src/main/java/de/juplo/plugins/hibernate4/Hbm2DdlMojo.java
index 6c4c31a4..2e232bf1 100644
--- a/src/main/java/de/juplo/plugins/hibernate4/Hbm2DdlMojo.java
+++ b/src/main/java/de/juplo/plugins/hibernate4/Hbm2DdlMojo.java
@@ -153,7 +153,7 @@ public class Hbm2DdlMojo extends AbstractMojo
    * The excecution is skipped automatically, if no modified or newly added
    * annotated classes are found and the dialect was not changed.
    *
-   * @parameter property="hibernate.export.skip" default-value="false"
+   * @parameter property="maven.test.skip" default-value="false"
    */
   private boolean skip;
 
@@ -552,15 +552,27 @@ public class Hbm2DdlMojo extends AbstractMojo
         getLog().debug("SQL-dialect unchanged.");
       else
       {
-        getLog().debug("SQL-dialect changed: " + dialect);
         modified = true;
-        md5s.put(DIALECT, dialect);
+        if (dialect == null)
+        {
+          getLog().debug("SQL-dialect was unset.");
+          md5s.remove(DIALECT);
+        }
+        else
+        {
+          getLog().debug("SQL-dialect changed: " + dialect);
+          md5s.put(DIALECT, dialect);
+        }
       }
     }
     else
     {
-      modified = true;
-      md5s.put(DIALECT, properties.getProperty(DIALECT));
+      String dialect = properties.getProperty(DIALECT);
+      if (dialect != null)
+      {
+        modified = true;
+        md5s.put(DIALECT, properties.getProperty(DIALECT));
+      }
     }
 
     /** The generated SQL varies with the envers-configuration */