de.invation.code.toval.time.Interval Maven / Gradle / Ivy

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TOVAL comprises a set of java classes for common programming issues. It includes utils for arrays, lists, sets and collections for convenient handling and modification, but also support for mathematic definitions concerning logic (clauses + resolution) together with some algorithms for permutations, powersets and resolution. Additionally it contains a number of types for multisets, matrices with object keys and much more.

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package de.invation.code.toval.time;

public class Interval implements Comparable{

	private final String toStringFormat = "[%s , %s]";
	private long start;
	private long end;

	public Interval(long startTime, long endTime) {
		this.start = startTime;
		this.end = endTime;
		checkValidity();
	}
	
	private void checkValidity(){
		if(start == end || start > end)
			throw new IllegalArgumentException();
	}
	
	public long getStart(){
		return start;
	}
	
	public void setStart(long startTime){
		this.start = startTime;
		checkValidity();
	}
	
	public long getEnd(){
		return end;
	}
	
	public void setEnd(long endTime){
		this.end = endTime;
		checkValidity();
	}
	
	public long length(){
		return end - start;
	}
	
	public boolean contains(Interval interval){
		return interval.getStart() >= getStart() && interval.getEnd() <= getEnd();
	}

	@Override
	public int compareTo(Interval o) {
		return (int) Math.signum(o.length()-length());
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + (int) (end ^ (end >>> 32));
		result = prime * result + (int) (start ^ (start >>> 32));
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Interval other = (Interval) obj;
		if (end != other.end)
			return false;
		if (start != other.start)
			return false;
		return true;
	}
	
	@Override
	public Interval clone(){
		return new Interval(getStart(), getEnd());
	}
	
	@Override
	public String toString() {
		return String.format(toStringFormat, start, end);
	}
	
	public static void main(String[] args) {
		new Interval(1L,10L);
	}

}