[gxml] GomCollection: added abstract search() method

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit a018ac753bf23e515d3291336ea6c4300e317d4b
Author: Daniel Espinosa <esodan gmail com>
Date:   Sat Nov 5 23:34:18 2016 -0600

    GomCollection: added abstract search() method
    
    Implementations should be able to search and add
    referecences to indexs for GomObject nodes
    that can our should be part of a collection

 gxml/GomCollections.vala |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/gxml/GomCollections.vala b/gxml/GomCollections.vala
index 19677f9..38ff5ce 100644
--- a/gxml/GomCollections.vala
+++ b/gxml/GomCollections.vala
@@ -42,6 +42,11 @@ public interface GXml.GomCollection : Object
    */
   public abstract string element_name { get; construct set; }
   /**
+   * Search and add references to all {@link GomObject} nodes as child of
+   * {@link element} with same, case insensitive, name of {@link element_name}
+   */
+  public abstract void search () throws GLib.Error;
+  /**
    * Gets a child {@link DomElement} of {@link element} referenced in
    * {@link nodes_index}.
    */
@@ -94,4 +99,14 @@ public class GXml.GomArrayList : Object, GomCollection {
                 (_("Invalid atempt to add a node with a different parent document"));
     _nodes_index.append (_element.child_nodes.size - 1);
   }
+  public void search () throws GLib.Error {
+    for (int i = 0; i < _element.child_nodes.size; i++) {
+      var n = _element.child_nodes.get (i);
+      if (n is GomObject) {
+        if ((n as DomElement).local_name.down () == element_name.down ()) {
+          _nodes_index.append (i);
+        }
+      }
+    }
+  }
 }