Schema aware comparison

[Wesley Leggette]

In my application code, I've attempted to implement a somewhat generic
content aware comparison. Would anyone care to review this and let me know
if it seems correct? If it is a sound approach, should I look to make a
patch adding this to xmlbeans proper?


Thanks,
Wesley


----------


   private boolean objectEquals(final XmlObject a, final XmlObject b)
   {
      if (a == null)
      {
         if (b == null)
            return true;
         else
            return false;
      }

      if (b == null)
         return false;

      if (a instanceof SimpleValue)
      {
         if (b instanceof SimpleValue)
            return a.valueEquals(b);
         else
            return false;
      }

      final SchemaType sa = a.schemaType();
      final SchemaType sb = b.schemaType();

      if (!sa.equals(sb))
         return false;

      // compare attributes
      for (final SchemaProperty property : sa.getAttributeProperties())
      {
         final XmlObject pa = a.selectAttribute(property.getName());
         final XmlObject pb = b.selectAttribute(property.getName());
         if (!objectEquals(pa, pb))
            return false;
      }

      // compare elements
      for (final SchemaProperty property : sa.getElementProperties())
      {
         final XmlObject[] ea = a.selectChildren(property.getName());
         final XmlObject[] eb = b.selectChildren(property.getName());

         if (ea.length != eb.length)
            return false;
         for (int i = 0; i < ea.length; i++)
            objectEquals(ea[i], eb[i]);
      }

      return a.valueEquals(b);
   }







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