/*
 * Copyright (C) 2010 ZXing authors
 *
 * 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.
 */

/*
 * These authors would like to acknowledge the Spanish Ministry of Industry,
 * Tourism and Trade, for the support in the project TSI020301-2008-2
 * "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled
 * Mobile Dynamic Environments", led by Treelogic
 * ( http://www.treelogic.com/ ):
 *
 *   http://www.piramidepse.com/
 */

package com.google.zxing.oned.rss.expanded.decoders;

/**
 * @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)
 */
final class CurrentParsingState {

  private int position;
  private State encoding;

  private enum State {
    NUMERIC,
    ALPHA,
    ISO_IEC_646
  }

  CurrentParsingState() {
    this.position = 0;
    this.encoding = State.NUMERIC;
  }

  int getPosition() {
    return position;
  }

  void setPosition(int position) {
    this.position = position;
  }

  void incrementPosition(int delta) {
    position += delta;
  }

  boolean isAlpha() {
    return this.encoding == State.ALPHA;
  }

  boolean isNumeric() {
    return this.encoding == State.NUMERIC;
  }

  boolean isIsoIec646() {
    return this.encoding == State.ISO_IEC_646;
  }

  void setNumeric() {
    this.encoding = State.NUMERIC;
  }

  void setAlpha() {
    this.encoding = State.ALPHA;
  }

  void setIsoIec646() {
    this.encoding = State.ISO_IEC_646;
  }
}
