org.jgrasstools.gears.utils.features.FeatureGeometrySubstitutor Maven / Gradle / Ivy
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/*
* This file is part of JGrasstools (http://www.jgrasstools.org)
* (C) HydroloGIS - www.hydrologis.com
*
* JGrasstools is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package org.jgrasstools.gears.utils.features;
import java.util.List;
import org.geotools.factory.FactoryRegistryException;
import org.geotools.feature.SchemaException;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
import org.opengis.feature.type.FeatureType;
import org.opengis.feature.type.GeometryDescriptor;
import com.vividsolutions.jts.geom.Geometry;
/**
* Utility to clone features by modify only the geometry.
*
* @author Andrea Antonello (www.hydrologis.com)
*/
public class FeatureGeometrySubstitutor {
private SimpleFeatureType newFeatureType;
public FeatureGeometrySubstitutor( SimpleFeatureType oldFeatureType ) throws Exception {
this(oldFeatureType, null);
}
/**
* @param oldFeatureType the {@link FeatureType} of the existing features.
* @throws FactoryRegistryException
* @throws SchemaException
*/
public FeatureGeometrySubstitutor( SimpleFeatureType oldFeatureType, Class< ? > newGeometryType ) throws Exception {
List oldAttributeDescriptors = oldFeatureType.getAttributeDescriptors();
// create the feature type
SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder();
b.setName(oldFeatureType.getName());
b.setCRS(oldFeatureType.getCoordinateReferenceSystem());
if (newGeometryType == null) {
b.addAll(oldAttributeDescriptors);
} else {
for( AttributeDescriptor attributeDescriptor : oldAttributeDescriptors ) {
if (attributeDescriptor instanceof GeometryDescriptor) {
b.add("the_geom", newGeometryType);
} else {
b.add(attributeDescriptor);
}
}
}
newFeatureType = b.buildFeatureType();
}
public SimpleFeatureType getNewFeatureType() {
return newFeatureType;
}
/**
* @param oldFeature the feature from which to clone the existing attributes from.
* @param newGeometry new geometry to insert.
* @return the new created feature, as merged from the old feature plus the new attributes.
*/
public SimpleFeature substituteGeometry( SimpleFeature oldFeature, Geometry newGeometry ) {
return substituteGeometry(oldFeature, newGeometry, null);
}
public SimpleFeature substituteGeometry( SimpleFeature oldFeature, Geometry newGeometry, String id ) {
Object[] attributes = oldFeature.getAttributes().toArray();
Object[] newAttributes = new Object[attributes.length];
System.arraycopy(attributes, 0, newAttributes, 0, attributes.length);
newAttributes[0] = newGeometry;
// create the feature
SimpleFeatureBuilder builder = new SimpleFeatureBuilder(newFeatureType);
builder.addAll(newAttributes);
SimpleFeature f = builder.buildFeature(id);
return f;
}
}