code: /*
   Copyright 1995-2015 Esri
  
     Licensed 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.
  
   For additional information, contact:
   Environmental Systems Research Institute, Inc.
   Attn: Contracts Dept
   380 New York Street
   Redlands, California, USA 92373
  
   email: contracts@esri.com
   */
  
  package com.esri.core.geometry;
  
  class OperatorBufferCursor extends GeometryCursor {
  	Bufferer m_bufferer = new Bufferer();
  	private GeometryCursor m_inputGeoms;
  	private SpatialReferenceImpl m_Spatial_reference;
  	private ProgressTracker m_progress_tracker;
  	private double[] m_distances;
  	private Envelope2D m_currentUnionEnvelope2D;
      double m_max_deviation;
      int m_max_vertices_in_full_circle;
  	private int m_index;
  	private int m_dindex;
  
  	OperatorBufferCursor(GeometryCursor inputGeoms, SpatialReference sr,
  			double[] distances,
  			double max_deviation,
  			int max_vertices,
  			boolean b_union,
  			ProgressTracker progress_tracker) {
  		m_index = -1;
  		m_inputGeoms = inputGeoms;
  		m_max_deviation = max_deviation;
  		m_max_vertices_in_full_circle = max_vertices;
  		m_Spatial_reference = (SpatialReferenceImpl) (sr);
  		m_distances = distances;
  		m_currentUnionEnvelope2D = new Envelope2D();
  		m_currentUnionEnvelope2D.setEmpty();
  		m_dindex = -1;
  		m_progress_tracker = progress_tracker;
  	}
  
  	@Override
  	public Geometry next() {
  		{
  			Geometry geom;
  			while ((geom = m_inputGeoms.next()) != null) {
  				m_index = m_inputGeoms.getGeometryID();
  				if (m_dindex + 1 < m_distances.length)
  					m_dindex++;
  
  				return buffer(geom, m_distances[m_dindex]);
  			}
  			return null;
  		}
  	}
  
  	@Override
  	public int getGeometryID() {
  		return m_index;
  	}
  
  	// virtual bool IsRecycling() OVERRIDE { return false; }
  	Geometry buffer(Geometry geom, double distance) {
  		return m_bufferer.buffer(geom, distance, m_Spatial_reference,
  				m_max_deviation, m_max_vertices_in_full_circle, m_progress_tracker);
  	}
  }
  