QgsField serialization

qgis · May 18, 2015 · e474e09 · e474e09
1 parent 6e3cbe3
commit e474e09
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diff --git a/src/core/qgsfield.cpp b/src/core/qgsfield.cpp
@@ -176,6 +176,31 @@ bool QgsField::convertCompatible( QVariant& v ) const
   return true;
 }
 
+QDataStream& operator<<( QDataStream& out, const QgsField& field )
+{
+  out << field.name();
+  out << ( quint32 )field.type();
+  out << field.typeName();
+  out << field.length();
+  out << field.precision();
+  out << field.comment();
+  return out;
+}
+
+QDataStream& operator>>( QDataStream& in, QgsField& field )
+{
+  quint32 type, length, precision;
+  QString name, typeName, comment;
+  in >> name >> type >> typeName >> length >> precision >> comment;
+  field.setName( name );
+  field.setType(( QVariant::Type )type );
+  field.setTypeName( typeName );
+  field.setLength(( int )length );
+  field.setPrecision(( int )precision );
+  field.setComment( comment );
+  return in;
+}
+
 ////////////////////////////////////////////////////////////////////////////
 
 QgsFields::QgsFields()
@@ -341,3 +366,27 @@ QgsAttributeList QgsFields::allAttributesList() const
     lst.append( i );
   return lst;
 }
+
+QDataStream& operator<<( QDataStream& out, const QgsFields& fields )
+{
+  out << ( quint32 )fields.size();
+  for ( int i = 0; i < fields.size(); i++ )
+  {
+    out << fields.field( i );
+  }
+  return out;
+}
+
+QDataStream& operator>>( QDataStream& in, QgsFields& fields )
+{
+  fields.clear();
+  quint32 size;
+  in >> size;
+  for ( quint32 i = 0; i < size; i++ )
+  {
+    QgsField field;
+    in >> field;
+    fields.append( field );
+  }
+  return in;
+}
diff --git a/src/core/qgsfield.h b/src/core/qgsfield.h
@@ -156,6 +156,10 @@ class CORE_EXPORT QgsField
 
 Q_DECLARE_METATYPE( QgsField );
 
+/** Writes the field to stream out. QGIS version compatibility is not guaranteed. */
+CORE_EXPORT QDataStream& operator<<( QDataStream& out, const QgsField& field );
+/** Reads a field from stream in into field. QGIS version compatibility is not guaranteed. */
+CORE_EXPORT QDataStream& operator>>( QDataStream& in, QgsField& field );
 
 /** \class QgsFields
  * \ingroup core
@@ -274,4 +278,9 @@ class CORE_EXPORT QgsFields
 
 Q_DECLARE_METATYPE( QgsFields );
 
+/** Writes the fields to stream out. QGIS version compatibility is not guaranteed. */
+CORE_EXPORT QDataStream& operator<<( QDataStream& out, const QgsFields& fields );
+/** Reads fields from stream in into fields. QGIS version compatibility is not guaranteed. */
+CORE_EXPORT QDataStream& operator>>( QDataStream& in, QgsFields& fields );
+
 #endif