source: josm/trunk/src/org/openstreetmap/josm/data/osm/history/RelationMember.java@ 3083

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.data.osm.history;

import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
import org.openstreetmap.josm.tools.CheckParameterUtil;

/**
 * Represents a relation member in the context of a historical view on
 * OSM data.
 *
 */
public class RelationMember {

    private String role;
    private OsmPrimitiveType primitiveType;
    private long primitiveId;

    /**
     *
     * @param role  the role
     * @param primitiveType  the type (must not be null)
     * @param primitiveId the id
     *
     * @exception IllegalArgumentException thrown, if primitiveType is null
     */
    public RelationMember(String role, OsmPrimitiveType primitiveType, long primitiveId) {
        this.role = (role == null ? "" : role);
        CheckParameterUtil.ensureParameterNotNull(primitiveType, "primitiveType");
        this.primitiveType = primitiveType;
        this.primitiveId = primitiveId;
    }

    /**
     * replies the member role
     * @return the member role
     */
    public String getRole() {
        return role;
    }

    /**
     * replies the type of the referenced OSM primitive
     *
     * @return the type of the referenced OSM primitive
     */
    public OsmPrimitiveType getPrimitiveType() {
        return primitiveType;
    }

    /**
     * replies the id of the referenced OSM primitive
     *
     * @return the id of the referenced OSM primitive
     */
    public long getPrimitiveId() {
        return primitiveId;
    }
}