Now reports all id's which were referenced but do not exist, rather than just the first invalid id.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193537 13f79535-47bb-0310-9956-ffa450edef68

src/org/apache/fop/datatypes/IDReferences.java

@@ -180,18 +180,22 @@ public class IDReferences {
 
 
     /**
-     * Returns the first invalid id still remaining in the validation list
+     * Returns all invalid id's still remaining in the validation list
      * 
-     * @return first id in validation list
+     * @return invalid ids from validation list
      */
-    public String getNextInvalidId()
+    public String getInvalidIds()
     {
-        Enumeration enum=idValidation.keys();
-        return enum.nextElement().toString();                
+        StringBuffer list=new StringBuffer();
+        Enumeration enum=idValidation.keys();        
+        while(enum.hasMoreElements())
+        {
+            list.append("\n\"").append(enum.nextElement().toString()).append("\" ")  ;
+        }
+        return list.toString();;                
     }
 
 
-
     /**
      * Determines whether specified id already exists in IDReferences
      *