// $Header:
// /deegreerepository/deegree/src/org/deegree/model/filterencoding/capabilities/FilterCapabilities100Factory.java,v
// 1.3 2005/03/09 11:55:46 mschneider Exp $
/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.model.filterencoding.capabilities;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.deegree.framework.log.ILogger;
import org.deegree.framework.log.LoggerFactory;
import org.deegree.framework.xml.ElementList;
import org.deegree.framework.xml.NamespaceContext;
import org.deegree.framework.xml.XMLFragment;
import org.deegree.framework.xml.XMLParsingException;
import org.deegree.framework.xml.XMLTools;
import org.deegree.ogcbase.CommonNamespaces;
import org.deegree.ogcwebservices.getcapabilities.UnknownOperatorNameException;
import org.w3c.dom.Element;
/**
*
*
*
* @version $Revision: 1.11 $
* @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
* @author last edited by: $Author: poth $
*
* @version 1.0. $Revision: 1.11 $, $Date: 2006/08/02 21:15:45 $
*
* @since 2.0
*/
public class FilterCapabilities100Fragment extends XMLFragment {
private static final URI OGCNS = CommonNamespaces.OGCNS;
private static final ILogger LOG = LoggerFactory.getLogger( FilterCapabilities100Fragment.class );
private static NamespaceContext nsContext = CommonNamespaces.getNamespaceContext();
/**
* Creates a new <code>FilterCapabilities100Fragment</code> from the given parameters.
*
* @param element
* @param systemId
*/
public FilterCapabilities100Fragment( Element element, URL systemId ) {
super( element );
setSystemId( systemId );
}
/**
* Returns the object representation for the <code>ogc:Filter_Capabilities</code> root
* element.
*
* @return object representation for the given <code>ogc:Filter_Capabilities</code> element
* @throws XMLParsingException
*/
public FilterCapabilities parseFilterCapabilities() throws XMLParsingException {
Element e1 = (Element) XMLTools.getRequiredNode( getRootElement(),
"ogc:Scalar_Capabilities", nsContext );
Element e2 = (Element) XMLTools.getRequiredNode( getRootElement(),
"ogc:Spatial_Capabilities", nsContext );
return new FilterCapabilities( parseScalarCapabilities( e1 ),
parseSpatialCapabilities( e2 ) );
}
/**
* Returns the object representation for an <code>ogc:Spatial_Capabilities</code> element.
*
* @return object representation for the given <code>ogc:Spatial_Capabilities</code> element
* @throws XMLParsingException
*/
private SpatialCapabilities parseSpatialCapabilities( Element spatialElement )
throws XMLParsingException {
Map operatorMap = parseOperators( (Element) XMLTools.getRequiredNode( spatialElement,
"ogc:Spatial_Operators", nsContext ) );
ArrayList operators = new ArrayList();
Iterator it = operatorMap.keySet().iterator();
while (it.hasNext()) {
try {
operators.add( OperatorFactory100.createSpatialOperator( (String) it.next() ) );
} catch (UnknownOperatorNameException e) {
throw new XMLParsingException(
"Unknown operator name in 'ogc:Spatial_Operators' element encountered: "
+ e.getMessage(), e );
}
}
return new SpatialCapabilities( (SpatialOperator[]) operators
.toArray( new SpatialOperator[operators.size()] ) );
}
/**
* Returns the object representation for an <code>ogc:Scalar_Capabilities</code> element.
*
* @return object representation for the given <code>ogc:Scalar_Capabilities</code> element
* @throws XMLParsingException
*/
private ScalarCapabilities parseScalarCapabilities( Element scalarElement )
throws XMLParsingException {
// "Logical_Operators"-element
boolean supportsLogicalOperators = false;
if ( XMLTools.getChildElement( "Logical_Operators", OGCNS, scalarElement ) != null ) {
supportsLogicalOperators = true;
}
// "Comparison_Operators"-element
Element elem = XMLTools.getRequiredChildElement( "Comparison_Operators", OGCNS, scalarElement );
Map operatorMap = parseOperators( elem );
ArrayList<Operator> operators = new ArrayList<Operator>();
Iterator it = operatorMap.keySet().iterator();
while (it.hasNext()) {
try {
operators.add( OperatorFactory100.createComparisonOperator( (String) it.next() ) );
} catch (UnknownOperatorNameException e) {
LOG.logError( e.getMessage(), e );
}
}
Operator[] comparionsOperators = operators.toArray( new Operator[operators.size()] );
// "Arithmetic_Operators"-element
elem = XMLTools.getRequiredChildElement( "Arithmetic_Operators", OGCNS, scalarElement );
operatorMap = parseOperators( elem );
operators = new ArrayList<Operator>();
it = operatorMap.keySet().iterator();
while (it.hasNext()) {
try {
String operatorName = (String) it.next();
if ( operatorName.equals( OperatorFactory100.OPERATOR_FUNCTIONS ) ) {
// functions definition
Element functionsElement = (Element) operatorMap.get( operatorName );
Element functionNamesElement =
XMLTools.getRequiredChildElement( "Function_Names", OGCNS, functionsElement );
List functionNameList = XMLTools.getRequiredNodes(
functionNamesElement, "ogc:Function_Name", nsContext );
for (int i = 0; i < functionNameList.size(); i++) {
Element functionNameElement = (Element) functionNameList.get( i );
String name = XMLTools.getStringValue( functionNameElement );
String argumentCount = XMLTools.getRequiredAttrValue( "nArgs", null,
functionNameElement );
if ( name == null
|| name.length() == 0 ) {
throw new XMLParsingException( "Error parsing a 'Function_Name' (namespace: '"
+ OGCNS + "') element: text node is empty." );
}
try {
operators.add( OperatorFactory100.createArithmeticFunction( name,
Integer.parseInt( argumentCount ) ) );
} catch (NumberFormatException e) {
throw new XMLParsingException( "Error parsing 'Function_Name' (namespace: '"
+ OGCNS + "') element: attribute 'nArgs'"
+ " does not contains a valid integer value." );
}
}
} else {
// simple operator
operators.add( OperatorFactory100.createArithmeticOperator( operatorName ) );
}
} catch (UnknownOperatorNameException e) {
LOG.logError( e.getMessage(), e );
}
}
Operator[] arithmeticOperators = operators.toArray( new Operator[operators.size()] );
return new ScalarCapabilities( supportsLogicalOperators, comparionsOperators,
arithmeticOperators );
}
private Map parseOperators( Element operatorsElement ) {
HashMap operators = new HashMap();
ElementList operatorList = XMLTools.getChildElements( operatorsElement );
for (int i = 0; i < operatorList.getLength(); i++) {
String namespaceURI = operatorList.item( i ).getNamespaceURI();
if ( namespaceURI != null
&& namespaceURI.equals( OGCNS.toASCIIString() ) ) {
operators.put( operatorList.item( i ).getLocalName(), operatorList.item( i ) );
}
}
return operators;
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: FilterCapabilities100Fragment.java,v $
Revision 1.11 2006/08/02 21:15:45 poth
bug fix - comparing namespace URIs -> convert URI to string before comparing
Revision 1.10 2006/07/12 14:46:16 poth
comment footer added
********************************************************************** */