add an option to suppress processor warnings. PR 18897.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@720775 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -555,6 +555,11 @@ Other changes:
  * <xslt> now fails early if a specified stylesheet doesn't exist.
    Bugzilla Report 34525.
 
+ * <xslt> now has an option to supress transformer warnings.  This
+   option only has an effect for processors that support this feature;
+   the "trax" processor included with Ant does support it.
+   Bugzilla Report 18897.
+
 Changes from Ant 1.7.0 TO Ant 1.7.1
 =============================================
 

docs/manual/CoreTasks/style.html

@@ -222,6 +222,14 @@ element which is used to perform Entity and URI resolution.</p>
     <em>Since Ant 1.7</em>.</td>
     <td valign="top" align="center">No</td>
   </tr>
+  <tr>
+    <td valign="top">supressWarnings</td>
+    <td valign="top">Whether processor warnings shall be suppressed.
+    This option requires support by the processor, it is supported by
+    the trax processor bundled with Ant. 
+    <em>Since Ant 1.8.0</em>.</td>
+    <td valign="top" align="center">No, default is false.</td>
+  </tr>
 </table>
 <h3>Parameters specified as nested elements</h3>
 

src/main/org/apache/tools/ant/taskdefs/XSLTProcess.java

@@ -169,6 +169,13 @@ public class XSLTProcess extends MatchingTask implements XSLTLogger {
      */
     public static final String PROCESSOR_TRAX = "trax";
 
+    /**
+     * whether to suppress warnings.
+     *
+     * @since Ant 1.8.0
+     */
+    private boolean suppressWarnings = false;
+
     /**
      * Creates a new XSLTProcess Task.
      */
@@ -513,6 +520,24 @@ public class XSLTProcess extends MatchingTask implements XSLTLogger {
         this.fileDirParameter = fileDirParameter;
     }
 
+    /**
+     * Whether to suppress warning messages of the processor.
+     *
+     * @since Ant 1.8.0
+     */
+    public void setSuppressWarnings(boolean b) {
+        suppressWarnings = b;
+    }
+
+    /**
+     * Whether to suppress warning messages of the processor.
+     *
+     * @since Ant 1.8.0
+     */
+    public boolean getSuppressWarnings() {
+        return suppressWarnings;
+    }    
+
     /**
      * Load processor here instead of in setProcessor - this will be
      * called from within execute, so we have access to the latest

src/main/org/apache/tools/ant/taskdefs/optional/TraXLiaison.java

@@ -122,6 +122,9 @@ public class TraXLiaison implements XSLTLiaison3, ErrorListener, XSLTLoggerAware
     /** factory attributes */
     private Vector attributes = new Vector();
 
+    /** whether to suppress warnings */
+    private boolean suppressWarnings = false;
+
     /**
      * Constructor for TraXLiaison.
      * @throws Exception never
@@ -497,7 +500,9 @@ public class TraXLiaison implements XSLTLiaison3, ErrorListener, XSLTLoggerAware
      * @param e the exception to log.
      */
     public void warning(TransformerException e) {
-        logError(e, "Warning");
+        if (!suppressWarnings) {
+            logError(e, "Warning");
+        }
     }
 
     private void logError(TransformerException e, String type) {
@@ -588,5 +593,7 @@ public class TraXLiaison implements XSLTLiaison3, ErrorListener, XSLTLoggerAware
                 = (XSLTProcess.OutputProperty) props.nextElement();
             setOutputProperty(prop.getName(), prop.getValue());
         }
+
+        suppressWarnings = xsltTask.getSuppressWarnings();
     }
 }