How to use

export

method

in

org.deegree.filter.xml.Filter110XMLEncoder

/**
 * Serializes the given {@link Operator} object to XML.
 * 
 * @param operator
 *            <code>BooleanOperator</code> object to be serialized
 * @param writer
 *            target of the xml stream
 * @throws XMLStreamException
 * @throws TransformationException
 * @throws UnknownCRSException
 */
private static void export( Operator operator, XMLStreamWriter writer )
            throws XMLStreamException, UnknownCRSException, TransformationException {
  switch ( operator.getType() ) {
  case COMPARISON:
    export( (ComparisonOperator) operator, writer );
    break;
  case LOGICAL:
    export( (LogicalOperator) operator, writer );
    break;
  case SPATIAL:
    export( (SpatialOperator) operator, writer );
    break;
  }
}

private static void writeFilterFilter( GetRecords getRecords, XMLStreamWriter writer )
            throws XMLStreamException, UnknownCRSException, TransformationException {
  if ( getRecords.getConstraint() != null ) {
    writer.writeStartElement( CSW_202_PREFIX, "Constraint", CSW_202_NS );
    writer.writeAttribute( "version", "1.1.0" );
    Filter110XMLEncoder.export( getRecords.getConstraint(), writer );
    writer.writeEndElement();
  }
}

export( ( (OperatorFilter) filter ).getOperator(), writer );
break;

And andOp = (And) operator;
for ( int i = 0; i < andOp.getSize(); i++ ) {
  export( andOp.getParameter( i ), writer );
Or orOp = (Or) operator;
for ( int i = 0; i < orOp.getSize(); i++ ) {
  export( orOp.getParameter( i ), writer );
export( ( (Not) operator ).getParameter(), writer );
break;

case PROPERTY_IS_BETWEEN:
  PropertyIsBetween isBetween = (PropertyIsBetween) operator;
  export( isBetween.getExpression(), writer );
  writer.writeStartElement( CommonNamespaces.OGCNS, "LowerBoundary" );
  export( isBetween.getLowerBoundary(), writer );
  writer.writeEndElement();
  writer.writeStartElement( CommonNamespaces.OGCNS, "UpperBoundary" );
  export( isBetween.getUpperBoundary(), writer );
  writer.writeEndElement();
  break;
case PROPERTY_IS_EQUAL_TO:
  export( ( (PropertyIsEqualTo) operator ).getParameter1(), writer );
  export( ( (PropertyIsEqualTo) operator ).getParameter2(), writer );
  break;
case PROPERTY_IS_GREATER_THAN:
  export( ( (PropertyIsGreaterThan) operator ).getParameter1(), writer );
  export( ( (PropertyIsGreaterThan) operator ).getParameter2(), writer );
  break;
case PROPERTY_IS_GREATER_THAN_OR_EQUAL_TO:
  export( ( (PropertyIsGreaterThanOrEqualTo) operator ).getParameter1(), writer );
  export( ( (PropertyIsGreaterThanOrEqualTo) operator ).getParameter2(), writer );
  break;
case PROPERTY_IS_LESS_THAN:
  export( ( (PropertyIsLessThan) operator ).getParameter1(), writer );
  export( ( (PropertyIsLessThan) operator ).getParameter2(), writer );
  break;
case PROPERTY_IS_LESS_THAN_OR_EQUAL_TO:
  export( ( (PropertyIsLessThanOrEqualTo) operator ).getParameter1(), writer );
  export( ( (PropertyIsLessThanOrEqualTo) operator ).getParameter2(), writer );

  writer.writeAttribute( "name", function.getName() );
  for ( Expression param : function.getParameters() ) {
    export( param, writer );
  throw new UnsupportedOperationException( "Exporting of custom expressions is not implemented yet." );
case ADD:
  export( ( (Add) expression ).getParameter1(), writer );
  export( ( (Add) expression ).getParameter2(), writer );
  break;
case SUB:
  export( ( (Sub) expression ).getParameter1(), writer );
  export( ( (Sub) expression ).getParameter2(), writer );
  break;
case MUL:
  export( ( (Mul) expression ).getParameter1(), writer );
  export( ( (Mul) expression ).getParameter2(), writer );
  break;
case DIV:
  export( ( (Div) expression ).getParameter1(), writer );
  export( ( (Div) expression ).getParameter2(), writer );
  break;

switch ( version ) {
case WFS_110:
  Filter110XMLEncoder.export( filter, xmlWriter );
  break;
case WFS_100:

StringWriter sw = new StringWriter();
XMLStreamWriter out = XMLOutputFactory.newInstance().createXMLStreamWriter( sw );
Filter110XMLEncoder.export( expr, out );
xmlText.append( sw.toString() );

Filter110XMLEncoder.export( query.getFilter(), writer );
  if ( nextSortProperty.getSortProperty() != null ) {
    writer.writeStartElement( CommonNamespaces.OGC_PREFIX, "SortProperty", CommonNamespaces.OGCNS );
    Filter110XMLEncoder.export( nextSortProperty.getSortProperty(), writer );
    writer.writeStartElement( CommonNamespaces.OGC_PREFIX, "SortOrder", CommonNamespaces.OGCNS );
    writer.writeCharacters( ( nextSortProperty.getSortOrder() ? "ASC" : "DESC" ) );

export( propertyName, writer );