| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.sis.filter; |
| |
| import java.util.List; |
| import java.util.Collection; |
| import java.util.Objects; |
| import javax.measure.Quantity; |
| import javax.measure.quantity.Length; |
| import org.opengis.geometry.Geometry; |
| import org.apache.sis.geometry.wrapper.Geometries; |
| import org.apache.sis.geometry.wrapper.GeometryWrapper; |
| import org.apache.sis.geometry.wrapper.SpatialOperationContext; |
| |
| // Specific to the main branch: |
| import org.apache.sis.pending.geoapi.filter.Literal; |
| import org.apache.sis.pending.geoapi.filter.DistanceOperatorName; |
| |
| |
| /** |
| * Spatial operations between two geometries and using a distance. |
| * The nature of the operation depends on the subclass. |
| * |
| * <h2>API design note</h2> |
| * This class has 3 parameters, but the third one is not an expression. |
| * It still a "binary" operator if we count only the expressions. |
| * |
| * @author Johann Sorel (Geomatys) |
| * @author Martin Desruisseaux (Geomatys) |
| * |
| * @param <R> the type of resources (e.g. {@code Feature}) used as inputs. |
| */ |
| final class DistanceFilter<R> extends BinaryGeometryFilter<R> { |
| /** |
| * For cross-version compatibility. |
| */ |
| private static final long serialVersionUID = -5304631042699647889L; |
| |
| /** |
| * Nature of the operation applied by this {@code DistanceOperator}. |
| */ |
| private final DistanceOperatorName operatorType; |
| |
| /** |
| * The buffer distance around the geometry of the second expression. |
| */ |
| @SuppressWarnings("serial") // Most SIS implementations are serializable. |
| private final Quantity<Length> distance; |
| |
| /** |
| * Creates a new spatial function. |
| * |
| * @param operatorType nature of the operation applied by this {@code DistanceOperator}. |
| * @param library the geometry library to use. |
| * @param geometry1 expression fetching the first geometry of the binary operator. |
| * @param geometry2 expression fetching the second geometry of the binary operator. |
| * @param distance the buffer distance around the geometry of the second expression. |
| */ |
| DistanceFilter(final DistanceOperatorName operatorType, |
| final Geometries<?> library, |
| final Expression<R,?> geometry1, |
| final Expression<R,?> geometry2, |
| final Quantity<Length> distance) |
| { |
| super(library, geometry1, geometry2, distance.getUnit().getSystemUnit()); |
| this.operatorType = Objects.requireNonNull(operatorType); |
| this.distance = distance; |
| } |
| |
| /** |
| * Recreates a new filter of the same type and with the same parameters, but using the given expressions. |
| * This method is invoked when it is possible to simplify or optimize at least one of the expressions that |
| * were given in the original call to the constructor. |
| */ |
| @Override |
| protected BinaryGeometryFilter<R> recreate(final Expression<R,?> geometry1, |
| final Expression<R,?> geometry2) |
| { |
| return new DistanceFilter<>(operatorType, getGeometryLibrary(expression1), geometry1, geometry2, distance); |
| } |
| |
| /** |
| * Identification of this operation. |
| */ |
| @Override |
| public DistanceOperatorName getOperatorType() { |
| return operatorType; |
| } |
| |
| /** |
| * Returns the two expressions used as parameters by this filter. |
| */ |
| @Override |
| public List<Expression<R,?>> getExpressions() { |
| return List.of(original(expression1), original(expression2), |
| new LeafExpression.Literal<>(distance)); |
| } |
| |
| /** |
| * Returns the two expressions together with the distance parameter. |
| * This is used for information purpose only, for example in order to build a string representation. |
| */ |
| @Override |
| protected Collection<?> getChildren() { |
| return List.of(original(expression1), original(expression2), distance); |
| } |
| |
| /** |
| * Returns the buffer distance around the geometry that will be used when comparing features geometries. |
| */ |
| public Quantity<Length> getDistance() { |
| return distance; |
| } |
| |
| /** |
| * Returns the literal geometry from which distances are measured. |
| * |
| * @throws IllegalStateException if the geometry is not a literal. |
| */ |
| public Geometry getGeometry() { |
| final Literal<R, ? extends GeometryWrapper> literal; |
| if (expression2 instanceof Literal<?,?>) { |
| literal = (Literal<R, ? extends GeometryWrapper>) expression2; |
| } else if (expression1 instanceof Literal<?,?>) { |
| literal = (Literal<R, ? extends GeometryWrapper>) expression1; |
| } else { |
| throw new IllegalStateException(); |
| } |
| return literal.getValue(); |
| } |
| |
| /** |
| * Given an object, determines if the test(s) represented by this filter are passed. |
| * |
| * @param object the object (often a {@code Feature} instance) to evaluate. |
| * @return {@code true} if the test(s) are passed for the provided object. |
| */ |
| @Override |
| public boolean test(final R object) { |
| final GeometryWrapper left = expression1.apply(object); |
| if (left != null) { |
| final GeometryWrapper right = expression2.apply(object); |
| if (right != null) try { |
| return left.predicate(operatorType, right, distance, context); |
| } catch (RuntimeException e) { |
| warning(e, true); |
| } |
| } |
| return emptyResult(); |
| } |
| |
| /** |
| * Returns the value to return when a test cannot be applied. |
| */ |
| @Override |
| protected boolean emptyResult() { |
| return SpatialOperationContext.emptyResult(operatorType); |
| } |
| } |