import org.opengis.feature.IllegalAttributeException; //导入依赖的package包/类
/**
 * Creates a sample Feature instance in the hope that it can be used in the rendering of the
 * legend graphic.
 * 
 * @param schema the schema for which to create a sample Feature instance
 * 
 *
 * 
 * @throws ServiceException
 */
private Feature createSampleFeature(FeatureType schema) throws ServiceException {
    Feature sampleFeature;
    try {
        if (schema instanceof SimpleFeatureType) {
            if (hasMixedGeometry((SimpleFeatureType) schema)) {
                // we can't create a sample for a generic Geometry type
                sampleFeature = null;
            } else {
                sampleFeature = SimpleFeatureBuilder.template((SimpleFeatureType) schema, null);
            }
        } else {
            sampleFeature = DataUtilities.templateFeature(schema);
        }
    } catch (IllegalAttributeException e) {
        throw new ServiceException(e);
    }
    return sampleFeature;
}
 

import org.opengis.feature.IllegalAttributeException; //导入依赖的package包/类
public void validate()
		throws IllegalAttributeException {
	simpleFeature.validate();
}
 

import org.opengis.feature.IllegalAttributeException; //导入依赖的package包/类
/** Not Implemented */
public void validate() throws IllegalAttributeException {}