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path: root/noncore/apps/tableviewer/db/xmlsource.h
authorkergoth <kergoth>2002-01-25 22:14:26 (UTC)
committer kergoth <kergoth>2002-01-25 22:14:26 (UTC)
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+/**********************************************************************
+** Copyright (C) 2000 Trolltech AS. All rights reserved.
+**
+** This file is part of Qtopia Environment.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+/* A Class to parse an xml docment of the form
+ * <database name="...">
+ * <header>
+ * <key name=key_name type=String>Displayed Name</key>
+ * <key name=key2name>key2name</key>
+ * <key name=key3name type=Date>Key 3</key>
+ * <key name=key4name type=Int>key 4</key>
+ * </header>
+ * <record>
+ * <key_name>string</key_name>
+ * <key4name>int</key4name>
+ * <key2name>string</key2name>
+ * </record>
+ * <record>
+ * ....
+ * </record>
+ * ....
+ * </database>
+ *
+ * There is some room for improvment mostly around using better checking
+ * and the use of more advanced xml features.
+ */
+
+#ifndef __XMLSOURCE_H__
+#define __XMLSOURCE_H__
+
+#include <qxml.h>
+#include <qstring.h>
+#include <qstringlist.h>
+#include <qstack.h>
+#include <qdict.h>
+#include "datacache.h"
+#include "common.h"
+
+
+class DBXml : public DBAccess
+{
+public:
+ /* create connection and either open or initialize */
+ DBXml(DBStore *d);
+ QString type();
+ bool openSource(QIODevice *);
+ bool saveSource(QIODevice *);
+ /* does a db write */
+ ~DBXml();
+};
+
+
+class DBXmlHandler : public QXmlDefaultHandler
+{
+
+public:
+ DBXmlHandler(DBStore *ds);
+ virtual ~DBXmlHandler();
+
+ // return the error protocol if parsing failed
+ QString errorProtocol();
+
+ // overloaded handler functions
+ bool startDocument();
+ bool startElement(const QString& namespaceURI, const QString& localName,
+ const QString& qName, const QXmlAttributes& atts);
+ bool endElement(const QString& namespaceURI, const QString& localName,
+ const QString& qName);
+ bool characters(const QString& ch);
+
+ QString errorString();
+
+ bool warning(const QXmlParseException& exception);
+ bool error(const QXmlParseException& exception);
+ bool fatalError(const QXmlParseException& exception);
+
+private:
+
+ QStack<QString> stack;
+ KeyList *current_keyrep;
+ DataElem *current_data;
+ TVVariant::KeyType last_key_type;
+
+ QString errorProt;
+ DBStore *data_store;
+
+ enum State {
+ StateInit,
+ StateHeader,
+ StateKey,
+ StateDocument,
+ StateRecord,
+ StateField
+ };
+
+ State state;
+
+ QDict<int> keyIndexList;
+ int keyIndex;
+ QString key;
+};
+
+#endif