/*---------------- 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;
import org.deegree.ogcbase.CommonNamespaces;
import org.w3c.dom.Element;
/**
* Encapsulates the information of a <FeatureId>element as defined in the
* FeatureId DTD. The <FeatureId>element is used to encode the unique
* identifier for any feature instance. Within a filter expression, the
* <FeatureId>is used as a reference to a particular feature instance.
*
* @author Markus Schneider
* @version 06.08.2002
*/
public class FeatureId {
/** The FeatureId's value. */
private String value;
/** Constructs a new FeatureId. */
public FeatureId( String value ) {
this.value = value;
}
/**
* Given a DOM-fragment, a corresponding Expression-object is built. This
* method recursively calls other buildFromDOM () - methods to validate the
* structure of the DOM-fragment.
*
* @throws FilterConstructionException
* if the structure of the DOM-fragment is invalid
*/
public static FeatureId buildFromDOM( Element element )
throws FilterConstructionException {
// check if root element's name equals 'FeatureId'
if ( !element.getLocalName().toLowerCase().equals( "featureid" ) )
throw new FilterConstructionException( "Name of element does not equal 'FeatureId'!" );
// determine the value of the FeatureId
String fid = element.getAttribute( "fid" );
if ( fid == null || "".equals( fid ) )
throw new FilterConstructionException( "<FeatureId> requires 'fid'-attribute!" );
return new FeatureId( fid );
}
/**
* Given a DOM-fragment, a corresponding Expression-object is built. This
* method recursively calls other buildFromDOM () - methods to validate the
* structure of the DOM-fragment.
*
* @throws FilterConstructionException
* if the structure of the DOM-fragment is invalid
*/
public static FeatureId buildGMLIdFromDOM( Element element )
throws FilterConstructionException {
// check if root element's name equals 'GmlObjectId'
if ( !element.getLocalName().equals( "GmlObjectId" ) )
throw new FilterConstructionException( "Name of element does not equal 'GmlObjectId'!" );
// determine the requested id
String gmlId = element.getAttributeNS( CommonNamespaces.GMLNS.toString(), "id" );
if ( gmlId == null || "".equals( gmlId ) )
throw new FilterConstructionException( "<GmlObjectId> requires 'gml:id'-attribute!" );
return new FeatureId( gmlId );
}
/**
* Returns the feature id. A feature id is built from it's feature type name
* and it's id separated by a ".". e.g. Road.A565
*
* @uml.property name="value"
*/
public String getValue() {
return value;
}
/**
* @see org.deegree.model.filterencoding.FeatureId#getValue()
*
* @uml.property name="value"
*/
public void setValue( String value ) {
this.value = value;
}
/** Produces an indented XML representation of this object. */
public StringBuffer toXML() {
StringBuffer sb = new StringBuffer();
sb.append( "<ogc:FeatureId fid=\"" ).append( value ).append( "\"/>" );
return sb;
}
}/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: FeatureId.java,v $
Revision 1.8 2006/07/25 12:27:30 mschneider
Fixed buildGMLIdFromDOM(). Uses value of attribute "gml:id" now, not "id".
Revision 1.7 2006/07/12 14:46:14 poth
comment footer added
********************************************************************** */