/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008-2011, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.feature;
import java.util.ArrayList;
import java.util.Collection;
import org.geotools.feature.type.GeometryDescriptorImpl;
import org.geotools.feature.type.GeometryTypeImpl;
import org.opengis.feature.Attribute;
import org.opengis.feature.ComplexAttribute;
import org.opengis.feature.Feature;
import org.opengis.feature.FeatureFactory;
import org.opengis.feature.GeometryAttribute;
import org.opengis.feature.Property;
import org.opengis.feature.type.AttributeDescriptor;
import org.opengis.feature.type.ComplexType;
import org.opengis.feature.type.FeatureType;
import org.opengis.feature.type.GeometryDescriptor;
import org.opengis.feature.type.GeometryType;
import org.opengis.filter.identity.FeatureId;
import org.opengis.filter.identity.GmlObjectId;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* {@link FeatureFactory} that:
*
* <ul>
* <li>does not choke on null ids
* <li>constructs containers for complex attributes with null values
* </ul>
*
* @author Ben Caradoc-Davies (CSIRO Earth Science and Resource Engineering)
* @version $Id$
*
*
*
* @source $URL$
* @since 2.6
*/
public class AppSchemaFeatureFactoryImpl extends ValidatingFeatureFactoryImpl {
/**
* Create an attribute, even for null id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createAttribute(java.lang.Object,
* org.opengis.feature.type.AttributeDescriptor, java.lang.String)
*/
@Override
public Attribute createAttribute(Object value, AttributeDescriptor descriptor, String id) {
return new AttributeImpl(value, descriptor, buildSafeGmlObjectId(id));
}
/**
* Create a new geometry attribute, even for null id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createGeometryAttribute(java.lang.Object,
* org.opengis.feature.type.GeometryDescriptor, java.lang.String,
* org.opengis.referencing.crs.CoordinateReferenceSystem)
*/
@Override
public GeometryAttribute createGeometryAttribute(Object value, GeometryDescriptor descriptor,
String id, CoordinateReferenceSystem crs) {
if (crs != null && !(crs.equals(descriptor.getCoordinateReferenceSystem()))) {
// update CRS
GeometryType origType = (GeometryType) descriptor.getType();
GeometryType geomType = new GeometryTypeImpl(origType.getName(), origType.getBinding(),
crs, origType.isIdentified(), origType.isAbstract(),
origType.getRestrictions(), origType.getSuper(), origType.getDescription());
geomType.getUserData().putAll(origType.getUserData());
descriptor = new GeometryDescriptorImpl(geomType, descriptor.getName(), descriptor
.getMinOccurs(), descriptor.getMaxOccurs(), descriptor.isNillable(),
((GeometryDescriptor) descriptor).getDefaultValue());
descriptor.getUserData().putAll(descriptor.getUserData());
}
return new GeometryAttributeImpl(value, descriptor, buildSafeGmlObjectId(id));
}
/**
* Create a new complex attribute, even for null value or id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createComplexAttribute(java.util.Collection,
* org.opengis.feature.type.AttributeDescriptor, java.lang.String)
*/
@Override
@SuppressWarnings("unchecked")
public ComplexAttribute createComplexAttribute(Collection value,
AttributeDescriptor descriptor, String id) {
return new ComplexAttributeImpl(buildCollectionIfNull(value), descriptor,
buildSafeGmlObjectId(id));
}
/**
* Create a new complex attribute, even for null value or id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createComplexAttribute(java.util.Collection,
* org.opengis.feature.type.ComplexType, java.lang.String)
*/
@Override
@SuppressWarnings("unchecked")
public ComplexAttribute createComplexAttribute(Collection value, ComplexType type, String id) {
return new ComplexAttributeImpl(buildCollectionIfNull(value), type,
buildSafeGmlObjectId(id));
}
/**
* Create a new feature, even for null value or id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createFeature(java.util.Collection,
* org.opengis.feature.type.AttributeDescriptor, java.lang.String)
*/
@Override
@SuppressWarnings("unchecked")
public Feature createFeature(Collection value, AttributeDescriptor descriptor, String id) {
return new FeatureImpl(buildCollectionIfNull(value), descriptor, buildSafeFeatureId(id));
}
/**
* Create a new feature, even for null value or id.
*
* @see org.geotools.feature.AbstractFeatureFactoryImpl#createFeature(java.util.Collection,
* org.opengis.feature.type.FeatureType, java.lang.String)
*/
@Override
@SuppressWarnings("unchecked")
public Feature createFeature(Collection value, FeatureType type, String id) {
return new FeatureImpl(buildCollectionIfNull(value), type, buildSafeFeatureId(id));
}
/**
* Construct a gml object id from a string, or return null if the string is null.
*
* @param id
* @return null if id is null
*/
private GmlObjectId buildSafeGmlObjectId(String id) {
if (id == null) {
return null;
} else {
return ff.gmlObjectId(id);
}
}
/**
* Construct a feature id, or return null if the string is null.
*
* @param id
* @return null if id is null
*/
private FeatureId buildSafeFeatureId(String id) {
if (id == null) {
return null;
} else {
return ff.featureId(id);
}
}
/**
* If the value collection is null, construct and return a new empty collection. If value
* collection is not null, it is returned.
*
* @param value
* @return a non-null collection
*/
private Collection<Property> buildCollectionIfNull(Collection<Property> value) {
if (value == null) {
return new ArrayList<Property>();
} else {
return value;
}
}
}