com.querydsl.spatial.jts.JTSGeometryCollectionExpression Maven / Gradle / Ivy
/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.querydsl.spatial.jts;
import javax.annotation.Nullable;
import com.querydsl.core.types.ConstantImpl;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.dsl.Expressions;
import com.querydsl.core.types.dsl.NumberExpression;
import com.querydsl.spatial.SpatialOps;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryCollection;
/**
* A Geometry collection is a geometric object that is a collection of some number of geometric objects.
*
* @author tiwe
*
* @param
*/
public abstract class JTSGeometryCollectionExpression extends JTSGeometryExpression {
private static final long serialVersionUID = 8874174644259834690L;
@Nullable
private transient volatile NumberExpression numGeometries;
public JTSGeometryCollectionExpression(Expression mixin) {
super(mixin);
}
/**
* Returns the number of geometries in this GeometryCollection.
*
* @return numbers of geometries
*/
public NumberExpression numGeometries() {
if (numGeometries == null) {
numGeometries = Expressions.numberOperation(Integer.class, SpatialOps.NUM_GEOMETRIES, mixin);
}
return numGeometries;
}
/**
* Returns the Nth geometry in this GeometryCollection.
*
* @param n one based index
* @return matching geometry
*/
public JTSGeometryExpression geometryN(Integer n) {
return JTSGeometryExpressions.geometryOperation(SpatialOps.GEOMETRYN, mixin, ConstantImpl.create(n));
}
}