/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.gfml; import gplx.*;
import gplx.stores.*; /*DataRdr_base*/
public abstract class GfmlDataRdr_base extends DataRdr_base implements DataRdr {
	@Override public String NameOfNode()			{return curNde.Hnd();}
	@Override public int FieldCount()			{return curNde.SubKeys().Count();}
	@Override public String KeyAt(int idx)		{return curNde.SubKeys().FetchAt(idx).KeyTkn().Val();}
	@Override public Object ReadAt(int idx)		{return GfmlAtr.as_(curNde.SubKeys().FetchAt(idx)).DatTkn().Val();}
	@Override public Object Read(String name)	{return curNde.SubKeys().FetchDataOrNull(name);}
	public boolean MoveNextPeer() {
		pos += 1;
		if (list == null || pos >= list.Count()) return false; // TODO_9: makeCurNde null; invalidate FieldAt, etc?
		curNde = list.FetchAt(pos);
		return true;
	}
	@Override public DataRdr Subs() {
		GfmlDataRdrNde rv = new GfmlDataRdrNde(curNde); rv.Parse_set(this.Parse());
		if (curNde != null) rv.list = curNde.SubHnds();
		return rv;
	}
	@Override public DataRdr Subs_byName_moveFirst(String name) {
		DataRdr subRdr = Subs_byName(name);
		return subRdr.MoveNextPeer() ? subRdr : DataRdr_.Null;
	}		
	public DataRdr Subs_byName(String name) {
		GfmlDataRdrNde rv = new GfmlDataRdrNde(curNde);
		rv.list = GfmlItmHnds.new_();
		if (curNde == null) return rv;
		for (int i = 0; i < curNde.SubHnds().Count(); i++) {
			GfmlNde sub = (GfmlNde)curNde.SubHnds().FetchAt(i);
			String typeName = sub.Type().NdeName();
			if (	sub.Type().IsTypeAny())		// isAnyType b/c match may not be exact; ex: type can be defined as item:key name; but actlNde may be item:key name size;
				//||	sub.Type().IsTypeNull())
				typeName = sub.Hnd();
			if (String_.Eq(typeName, name))
				rv.list.Add(sub);
		}
		return rv;
	}		
	public void Rls() {}
	public String XtoStr() {return curNde.XtoStr();}
	@gplx.Internal protected void SetNode(GfmlNde curNde) {this.curNde = curNde; this.list = curNde.SubHnds();}
	GfmlNde curNde; GfmlItmHnds list; int pos = -1;
}
