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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.geo.parsers;
import com.vividsolutions.jts.geom.Coordinate;
import org.elasticsearch.common.xcontent.ToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.List;
/**
* Node used to represent a tree of coordinates.
*
* Can either be a leaf node consisting of a Coordinate, or a parent with
* children
*/
public class CoordinateNode implements ToXContentObject {
public final Coordinate coordinate;
public final List children;
/**
* Creates a new leaf CoordinateNode
*
* @param coordinate
* Coordinate for the Node
*/
CoordinateNode(Coordinate coordinate) {
this.coordinate = coordinate;
this.children = null;
}
/**
* Creates a new parent CoordinateNode
*
* @param children
* Children of the Node
*/
CoordinateNode(List children) {
this.children = children;
this.coordinate = null;
}
public boolean isEmpty() {
return (coordinate == null && (children == null || children.isEmpty()));
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (children == null) {
builder.startArray().value(coordinate.x).value(coordinate.y).endArray();
} else {
builder.startArray();
for (CoordinateNode child : children) {
child.toXContent(builder, params);
}
builder.endArray();
}
return builder;
}
}