typefound prints diags in -v option

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@278516 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/ComponentHelper.java

@@ -789,7 +789,7 @@ public class ComponentHelper  {
     /**
      * Handler called to do decent diagnosis on instantiation failure.
      * @param componentName component name.
-     * @param type component type.
+     * @param type component type, used in error messages
      * @return a string containing as much diagnostics info as possible.
      */
     public String diagnoseCreationFailure(String componentName, String type) {

src/main/org/apache/tools/ant/taskdefs/condition/TypeFound.java

@@ -22,6 +22,7 @@ import org.apache.tools.ant.ComponentHelper;
 import org.apache.tools.ant.ProjectComponent;
 import org.apache.tools.ant.ProjectHelper;
 import org.apache.tools.ant.AntTypeDefinition;
+import org.apache.tools.ant.Project;
 
 /**
  * looks for a task or other Ant type that exists. Existence is defined as
@@ -59,13 +60,18 @@ public class TypeFound extends ProjectComponent implements Condition {
 
         ComponentHelper helper =
             ComponentHelper.getComponentHelper(getProject());
-        AntTypeDefinition def = helper.getDefinition(
-            ProjectHelper.genComponentName(uri, typename));
+        String componentName = ProjectHelper.genComponentName(uri, typename);
+        AntTypeDefinition def = helper.getDefinition(componentName);
         if (def == null) {
             return false;
         }
         //now verify that the class has an implementation
-        return def.getExposedClass(getProject()) != null;
+        boolean found = def.getExposedClass(getProject()) != null;
+        if(!found) {
+            String text= helper.diagnoseCreationFailure(componentName,"type");
+            log(text, Project.MSG_VERBOSE);
+        }
+        return found;
     }