/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2014 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wms.dimension.impl;
import org.geoserver.catalog.DimensionInfo;
import org.geoserver.catalog.FeatureTypeInfo;
import org.geoserver.catalog.ResourceInfo;
import org.geoserver.wms.dimension.AbstractFeatureAttributeVisitorSelectionStrategy;
import org.geotools.feature.visitor.CalcResult;
import org.geotools.feature.visitor.MinVisitor;
import org.geotools.util.Converters;
/**
* Default implementation for selecting the default values for dimensions of
* feature (vector) resources using the minimum domain value strategy.
*
* @author Ilkka Rinne / Spatineo Inc for the Finnish Meteorological Institute
*
*/
public class FeatureMinimumValueSelectionStrategyImpl extends
AbstractFeatureAttributeVisitorSelectionStrategy {
/**
* Default constructor.
*/
public FeatureMinimumValueSelectionStrategyImpl() {
}
@Override
public <T> T getDefaultValue(ResourceInfo resource, String dimensionName,
DimensionInfo dimension, Class<T> clz) {
final MinVisitor min = new MinVisitor(dimension.getAttribute());
CalcResult res = getCalculatedResult((FeatureTypeInfo) resource, dimension, min);
if (res.equals(CalcResult.NULL_RESULT)) {
return null;
} else {
return Converters.convert(min.getMin(), clz);
}
}
}