/*-
    * #%L
    * prolobjectlink-jpi-jpl
    * %%
    * Copyright (C) 2020 - 2021 Prolobjectlink Project
    * %%
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Lesser General Public License as
    * published by the Free Software Foundation, either version 2.1 of the
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Lesser Public License for more details.
   * 
   * You should have received a copy of the GNU General Lesser Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/lgpl-2.1.html>.
   * #L%
   */
  package io.github.prolobjectlink.prolog.jpl;
  
  import java.util.AbstractList;
  import java.util.ArrayList;
  import java.util.List;
  
  import io.github.prolobjectlink.prolog.PrologClause;
  import io.github.prolobjectlink.prolog.PrologClauses;
  
  class JplClauses extends AbstractList<PrologClause> implements PrologClauses {
  
  	private final int arity;
  	private final String functor;
  	private final List<PrologClause> list;
  
  	JplClauses(String functor, int arity) {
  		list = new ArrayList<PrologClause>();
  		this.functor = functor;
  		this.arity = arity;
  	}
  
  	public void add(int index, PrologClause element) {
  		list.add(index, element);
  	}
  
  	public PrologClause remove(int index) {
  		return list.remove(index);
  	}
  
  	public PrologClause get(int index) {
  		return list.get(index);
  	}
  
  	public int size() {
  		return list.size();
  	}
  
  	public boolean isDynamic() {
  		for (PrologClause prologClause : list) {
  			if (!prologClause.isDynamic()) {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	public boolean isMultifile() {
  		for (PrologClause prologClause : list) {
  			if (!prologClause.isMultifile()) {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	public boolean isDiscontiguous() {
  		for (PrologClause prologClause : list) {
  			if (!prologClause.isDiscontiguous()) {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	public String getIndicator() {
  		return functor + "/" + arity;
  	}
  
  	@Override
  	public int hashCode() {
  		final int prime = 31;
  		int result = super.hashCode();
  		result = prime * result + ((list == null) ? 0 : list.hashCode());
  		return result;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
 		if (this == obj)
 			return true;
 		if (!super.equals(obj))
 			return false;
 		if (getClass() != obj.getClass())
 			return false;
 		JplClauses other = (JplClauses) obj;
 		if (list == null) {
 			if (other.list != null)
 				return false;
 		} else if (!list.equals(other.list)) {
 			return false;
 		}
 		return true;
 	}
 
 }