package org.simantics.xml.sax;

import org.w3._2001.xmlschema.Any;
import org.w3._2001.xmlschema.Element;
import org.w3._2001.xmlschema.Group;

class MultiplicityRestriction {
	long min;
	long max;
	
	public MultiplicityRestriction(Element element) {
		long min = 1;
		if (element.getMinOccurs() != null)
			min = element.getMinOccurs().longValue();
		String element_maxS = element.getMaxOccurs();
		max = 1;
		
		if ("unbounded".equals(element_maxS)) {
			max = -1;
		} else if (element_maxS != null) {
			max = Long.parseLong(element_maxS);
			max = Math.max(min, max);
		}
	}
	
	public MultiplicityRestriction(Group element) {
		long min = 1;
		if (element.getMinOccurs() != null)
			min = element.getMinOccurs().longValue();
		String element_maxS = element.getMaxOccurs();
		max = 1;
		
		if ("unbounded".equals(element_maxS)) {
			max = -1;
		} else if (element_maxS != null) {
			max = Long.parseLong(element_maxS);
			max = Math.max(min, max);
		}
	}
	
	public MultiplicityRestriction(Any element) {
		long min = 1;
		if (element.getMinOccurs() != null)
			min = element.getMinOccurs().longValue();
		String element_maxS = element.getMaxOccurs();
		max = 1;
		
		if ("unbounded".equals(element_maxS)) {
			max = -1;
		} else if (element_maxS != null) {
			max = Long.parseLong(element_maxS);
			max = Math.max(min, max);
		}
	}
	
	public long getMin() {
		return min;
	}
	
	public long getMax() {
		return max;
	}
	
	public boolean many() {
		return max != 1;
	}
	
	public boolean single() {
		return max == 1;
	}
	
	public boolean singleOptional() {
		return max == 1 && min == 0;
	}
	
	public boolean singleRequired() {
		return max == 1 && min == 1;
	}
	
	@Override
	public boolean equals(Object obj) {
		if (obj == null)
			return false;
		if (!getClass().equals(obj.getClass()))
			return false;
		MultiplicityRestriction other = (MultiplicityRestriction)obj;
		return (min == other.min && max == other.max);
	}
	
	@Override
	public int hashCode() {
		return Long.hashCode(min) + Long.hashCode(max);
	}
}