/*
 *  Licensed to GraphHopper GmbH under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper GmbH 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 com.graphhopper.util;

/**
 * @author Peter Karich
 */
public interface PointAccess {
    /**
     * @return true if elevation data is stored and can be retrieved
     */
    boolean is3D();

    /**
     * @return 3 if elevation enabled. 2 otherwise
     */
    int getDimension();

    /**
     * This method ensures that the node with the specified index exists i.e. allocates space for
     * it.
     */
    void ensureNode(int nodeId);

    /**
     * This method ensures that the node with the specified index exists and prepares access to it.
     * The index goes from 0 (inclusive) to graph.getNodes() (exclusive)
     * <p>
     * This methods sets the latitude, longitude and elevation to the specified value.
     */
    void setNode(int nodeId, double lat, double lon);

    /**
     * This method ensures that the node with the specified index exists and prepares access to it.
     * The index goes from 0 (inclusive) to graph.getNodes() (exclusive)
     * <p>
     * This methods sets the latitude, longitude and elevation to the specified value.
     */
    void setNode(int nodeId, double lat, double lon, double ele);

    /**
     * @return the latitude at the specified node index
     */
    double getLatitude(int nodeId);

    double getLat(int nodeId);

    /**
     * @return the longitude at the specified node index
     */
    double getLongitude(int nodeId);

    double getLon(int nodeId);

    /**
     * Returns the elevation of the specified nodeId.
     */
    double getElevation(int nodeId);

    double getEle(int nodeId);
}