55 lines
1.8 KiB
Java
55 lines
1.8 KiB
Java
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/*
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* IvlComparatorSimple.java 2005-05-12
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*
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* Dirk Ansorge, FernUniversitaet Hagen
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*
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*/
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package twodsack.util.comparator;
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import twodsack.setelement.datatype.*;
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import twodsack.util.collectiontype.*;
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import java.util.*;
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/**
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* This class provides one single method: The {@link #compare(Object,Object)} method for two objects of type {@link twodsack.util.collectiontype.Interval}.
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* It can be used for all collections which have objects of type Interval as elements.
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*/
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public class IvlComparatorSimple implements Comparator {
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/*
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* constructors
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*/
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/**
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* The standard constructor.
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*/
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public IvlComparatorSimple(){}
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/*
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* methods
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*/
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/**
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* Compares both intervals and returns one of {0, 1, -1}.
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* This comparator compares the left and then right border of the interval and returns:<p>
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* 0, if both interval borders are equal
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* -1, if ino1 is smaller
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* 1 otherwise
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*
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* @param ino1 the first object
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* @param ino2 the second object
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* @return one of {0, 1, -1} as int
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* @throws WrongTypeException if <tt>ino1</tt> or <tt>ino2</tt> is not of type {@link twodsack.util.collectiontype.Interval}
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*/
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public int compare (Object ino1, Object ino2) throws WrongTypeException {
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if ((((MultiSetEntry)ino1).value instanceof Interval) &&
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(((MultiSetEntry)ino2).value instanceof Interval)) {
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Interval i1 = (Interval)(((MultiSetEntry)ino1).value);
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Interval i2 = (Interval)(((MultiSetEntry)ino2).value);
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return i1.comp(i2);
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}//if
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else throw new WrongTypeException("Exception in IvlComparatorSimple: Expected type Interval - found: "+((MultiSetEntry)ino1).value.getClass()+"/"+((MultiSetEntry)ino2).value.getClass());
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}//end method compare
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}//end class IvlComparatorSimple
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