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Sigma knowledge engineering system is an system for developing, viewing and debugging theories in first order logic. It works with Knowledge Interchange Format (KIF) and is optimized for the Suggested Upper Merged Ontology (SUMO) www.ontologyportal.org.
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package com.articulate.sigma.semRewrite.datesandnumber;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/*
Copyright 2014-2015 IPsoft

Author: Nagaraj Bhat [email protected]
        Rashmi Rao

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 Public License for more details.

You should have received a copy of the GNU General Public License
along with this program ; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA  02111-1307 USA 
*/

/** ***************************************************************
 * This class holds the necessary information for Date group namely year, month,day, start index and end index 
 * of the word, whether it is a week day. It also stores the information whether the object is of type date or 
 * duration.
 */
public class DateInfo {
	
	private String year = null;
	private String month = null;
	private String day = null;
	private int startIndex = -1;
	private int endIndex = -1;
	private String weekDay = null;
	private int timeCount = -1;
	private boolean durationFlag = false;
	
	public DateInfo(){
		
	}
	public DateInfo(DateInfo info){
		this.year = info.year;
		this.day = info.day;
		this.month = info.month;
		this.wordIndexes = new ArrayList();
		this.wordIndexes = info.wordIndexes;
		processWordIndexes();
	}
	
	public void setDurationFlag(boolean durationFlag) {
		this.durationFlag = durationFlag;
	}
	
	public String getYear() {
		return year;
	}
	public void setYear(String year) {
		this.year = year;
	}
	public String getMonth() {
		return month;
	}
	public void setMonth(String month) {
		this.month = month;
	}
	public String getDay() {
		return day;
	}
	public void setDay(String day) {
		this.day = day;
	}
	public int getWordIndex() {
		processWordIndexes();
		return startIndex;
	}
	
	public void clear() {
		this.day = null;
		this.month = null;
		this.year = null;
	}
	
	public int getTimeCount() {
		return timeCount;
	}

	public void setTimeCount(int timeCount) {
		this.timeCount = timeCount;
	}

	public String getWeekDay() {
		return weekDay;
	}

	public void setWeekDay(String weekDay) {
		this.weekDay = weekDay;
	}

	private List wordIndexes = new ArrayList();
	
	public void addWordIndex(int index) {
		this.wordIndexes.add(index);
	}
	
	public void processWordIndexes() {
		this.endIndex = Collections.max(this.wordIndexes);
		this.startIndex = Collections.min(this.wordIndexes);
	}
	
	public List getWordIndexes() {
		return wordIndexes;
	}
	
	public int getEndIndex() {
		processWordIndexes();
		return endIndex;
	}
	
	public void print() {
		System.out.println("Day, " + this.day + " Month, " + this.month + " Year, " + this.year + " Start Index, " + this.startIndex + " EndIndex, " + this.endIndex);
	}
	
    /** ***************************************************************
     */
	public boolean equals(DateInfo dateInfo) {
	    
		boolean dayFlag, monthFlag,yearFlag, weekDayFlag;
		dayFlag = monthFlag = yearFlag = weekDayFlag = true;
		if ((dateInfo.day != null) && (this.day != null) && !(dateInfo.day.equals(day))) {
			dayFlag = false;
		}
		if ((dateInfo.month != null) && (this.month != null) && !(dateInfo.month.equals(month))) {
			monthFlag = false;
		}
		if ((dateInfo.year != null) && (this.year != null) && !(dateInfo.year.equals(year))) {
			yearFlag = false;
		}
		if ((dateInfo.weekDay != null) && (this.weekDay != null) && !(dateInfo.weekDay.equals(weekDay))) {
			weekDayFlag = false;
		}
		return (dayFlag && monthFlag && yearFlag && weekDayFlag);
	}

    /** ***************************************************************
     */
	public int hashCode() {

	    int hash = 3;
	    hash = 53 * hash + (this.day != null  ? this.day.hashCode() : 0);
	    hash = 53 * hash + (this.month != null  ? this.month.hashCode() : 0);
	    hash = 53 * hash + (this.year != null  ? this.year.hashCode() : 0);
	    hash = 53 * hash + (this.weekDay != null  ? this.weekDay.hashCode() : 0);
	    return hash;
	}
	 
	/** ***************************************************************
	 */
	public boolean isEmpty() {
	    
	    if(this.day == null && this.month == null && this.year == null && this.weekDay == null)
	        return true;
	    return false;
	}

	/** ***************************************************************
     */
	public boolean isDuration() {
	    return durationFlag;
	}
}