4 Copyright (c) 2018, Mungo Carstairs
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32 package intervalstore.api;
34 import java.util.Collections;
35 import java.util.Comparator;
36 import java.util.List;
38 public interface IntervalI
41 * a comparator for sorting intervals by start position ascending
43 static Comparator<? super IntervalI> FORWARD_STRAND = new Comparator<IntervalI>()
46 public int compare(IntervalI o1, IntervalI o2)
48 return Integer.compare(o1.getBegin(), o2.getBegin());
53 * a comparator for sorting intervals by end position descending
55 static Comparator<? super IntervalI> REVERSE_STRAND = new Comparator<IntervalI>()
58 public int compare(IntervalI o1, IntervalI o2)
60 return Integer.compare(o2.getEnd(), o1.getEnd());
69 * Answers true if this interval contains (or matches) the given interval
74 default boolean containsInterval(IntervalI i)
77 && i.getBegin() >= getBegin() && i.getEnd() <= getEnd();
81 * Answers true if this interval properly contains the given interval, that
82 * is, it contains it and is larger than it
87 default boolean properlyContainsInterval(IntervalI i)
89 return containsInterval(i)
90 && (i.getBegin() > getBegin() || i.getEnd() < getEnd());
93 default boolean equalsInterval(IntervalI i)
95 return i != null && i.getBegin() == getBegin()
96 && i.getEnd() == getEnd();
99 default boolean overlapsInterval(IntervalI i)
105 if (i.getBegin() < getBegin())
107 return i.getEnd() >= getBegin();
109 if (i.getEnd() > getEnd())
111 return i.getBegin() <= getEnd();
113 return true; // i internal to this
117 * Sorts the list by start position ascending (if forwardString==true), or by
118 * end position descending
121 * @param forwardStrand
123 static void sortIntervals(List<? extends IntervalI> intervals,
124 final boolean forwardStrand)
126 Collections.sort(intervals,
127 forwardStrand ? FORWARD_STRAND : REVERSE_STRAND);
130 IntervalI getContainedBy();
132 void setContainedBy(IntervalI containedBy);