com.mysema.query.spatial.jts.JTSPointExpression 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.mysema.query.spatial.jts;
import javax.annotation.Nullable;
import com.mysema.query.spatial.SpatialOps;
import com.mysema.query.types.Expression;
import com.mysema.query.types.expr.NumberExpression;
import com.mysema.query.types.expr.NumberOperation;
import com.vividsolutions.jts.geom.Point;
/**
* A Point is a 0-dimensional geometric object and represents a single location in coordinate space. A Point has an
* x-coordinate value, a y-coordinate value. If called for by the associated Spatial Reference System, it may also
* have coordinate values for z and m.
*
* @author tiwe
*
* @param
*/
public abstract class JTSPointExpression extends JTSGeometryExpression {
private static final long serialVersionUID = -3549448861390349654L;
@Nullable
private volatile NumberExpression x, y, z, m;
public JTSPointExpression(Expression mixin) {
super(mixin);
}
/**
* The x-coordinate value for this Point.
*
* @return
*/
public NumberExpression x() {
if (x == null) {
x = NumberOperation.create(Double.class, SpatialOps.X, mixin);
}
return x;
}
/**
* The y-coordinate value for this Point.
*
* @return
*/
public NumberExpression y() {
if (y == null) {
y = NumberOperation.create(Double.class, SpatialOps.Y, mixin);
}
return y;
}
/**
* The z-coordinate value for this Point, if it has one. Returns NIL otherwise.
*
* @return
*/
public NumberExpression z() {
if (z == null) {
z = NumberOperation.create(Double.class, SpatialOps.Z, mixin);
}
return z;
}
/**
* The m-coordinate value for this Point, if it has one. Returns NIL otherwise.
*
* @return
*/
public NumberExpression m() {
if (m == null) {
m = NumberOperation.create(Double.class, SpatialOps.M, mixin);
}
return m;
}
}