# ----------------------------------------------------------------------------- # # Common methods for LineString features # # ----------------------------------------------------------------------------- # Copyright 2010 Daniel Azuma # # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # * Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # * Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # * Neither the name of the copyright holder, nor the names of any other # contributors to this software, may be used to endorse or promote products # derived from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # ----------------------------------------------------------------------------- ; module RGeo module ImplHelpers # :nodoc: module BasicLineStringMethods # :nodoc: def initialize(factory_, points_) _set_factory(factory_) @points = points_.map do |elem_| elem_ = Features.cast(elem_, factory_, Features::Point) unless elem_ raise Errors::InvalidGeometry, "Could not cast #{elem_}" end elem_ end _validate_geometry end def _validate_geometry if @points.size == 1 raise Errors::InvalidGeometry, 'LineString cannot have 1 point' end end def eql?(rhs_) if rhs_.is_a?(self.class) && rhs_.factory.eql?(@factory) && @points.size == rhs_.num_points rhs_.points.each_with_index{ |p_, i_| return false unless @points[i_].eql?(p_) } else false end end def num_points @points.size end def point_n(n_) @points[n_] end def points @points.dup end def dimension 1 end def geometry_type Features::LineString end def is_empty? @points.size == 0 end def start_point @points.first end def end_point @points.last end def is_closed? if @is_closed.nil? @is_closed = @points.size > 2 && @points.first == @points.last end @is_closed end def is_ring? is_closed? && is_simple? end end module BasicLineMethods # :nodoc: def initialize(factory_, start_, end_) _set_factory(factory_) cstart_ = Features.cast(start_, factory_, Features::Point) unless cstart_ raise Errors::InvalidGeometry, "Could not cast start: #{start_}" end cend_ = Features.cast(end_, factory_, Features::Point) unless cend_ raise Errors::InvalidGeometry, "Could not cast end: #{end_}" end @points = [cstart_, cend_] _validate_geometry end def _validate_geometry # :nodoc: super if @points.size > 2 raise Errors::InvalidGeometry, 'Line must have 0 or 2 points' end end def geometry_type Features::Line end end module BasicLinearRingMethods # :nodoc: def _validate_geometry # :nodoc: super if @points.size > 0 @points << @points.first if @points.first != @points.last if !is_ring? raise Errors::InvalidGeometry, 'LinearRing failed ring test' end end end def geometry_type Features::LinearRing end end end end