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Module to parse HELM Notation in the format 1 and 2.
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/**
 * *****************************************************************************
 * Copyright C 2015, The Pistoia Alliance
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *****************************************************************************
 */
package org.helm.notation2.parser.notation.polymer;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.helm.notation2.parser.exceptionparser.NotationException;
import org.helm.notation2.parser.exceptionparser.SimplePolymerSectionException;
import org.helm.notation2.parser.notation.ValidationMethod;
import org.jdom2.JDOMException;

/**
 * PolymerSingleElements class to represent a polymerelements for this class
 * only one monomer is allowed
 *
 * @author hecht
 */
public class PolymerSingleElements extends PolymerElements {

  public PolymerSingleElements() {

  }

  /**
   * Constructor
   * @param entity HELMEntity
   */
  public PolymerSingleElements(HELMEntity entity) {
    super(entity);
    this.listMonomerNotations = new ArrayList();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public List getListOfElements() {
    return this.listMonomerNotations;
  }

  /**
   * {@inheritDoc}
   *
   * @throws SimplePolymerSectionException if simple polymer section is not valid
   * @throws NotationException if not notation is not valid
   */
  @Override
  public void addMonomerNotation(String str) throws SimplePolymerSectionException, NotationException {
    if (this.listMonomerNotations.size() < 1) {
      this.listMonomerNotations.add(ValidationMethod.decideWhichMonomerNotation(str, entity.getType()));
    } else {
      throw new SimplePolymerSectionException("Only one Monomer unit is allowed for CHEM and BLOB");
    }

  }

  /**
   * {@inheritDoc}
   */
  @Override
  public MonomerNotation getCurrentMonomerNotation() {
    return this.listMonomerNotations.get(0);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void changeMonomerNotation(MonomerNotation not) {
    this.listMonomerNotations.set(0, not);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public String toString() {
    return this.listMonomerNotations.get(0).toString();
  }

}