import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Long2ObjectSortedMap<V> subMap(long from, long to) {
	if (top && bottom)
		return new Submap(from, false, to, false);
	if (!top)
		to = compare(to, this.to) < 0 ? to : this.to;
	if (!bottom)
		from = compare(from, this.from) > 0 ? from : this.from;
	if (!top && !bottom && from == this.from && to == this.to)
		return this;
	return new Submap(from, false, to, false);
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Selection atLeast(long value) {
    Selection selection = new BitmapBackedSelection();
    Long2ObjectSortedMap<IntArrayList> tail = index.tailMap(value);
    for (IntArrayList keys : tail.values()) {
        addAllToSelection(keys, selection);
    }
    return selection;
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Selection greaterThan(long value) {
    Selection selection = new BitmapBackedSelection();
    Long2ObjectSortedMap<IntArrayList> tail = index.tailMap(value + 1);
    for (IntArrayList keys : tail.values()) {
        addAllToSelection(keys, selection);
    }
    return selection;
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Selection atMost(long value) {
    Selection selection = new BitmapBackedSelection();
    Long2ObjectSortedMap<IntArrayList> head = index.headMap(value + 1);  // we add 1 to get values equal to the arg
    for (IntArrayList keys : head.values()) {
        addAllToSelection(keys, selection);
    }
    return selection;
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Selection lessThan(long value) {
    Selection selection = new BitmapBackedSelection();
    Long2ObjectSortedMap<IntArrayList> head = index.headMap(value);  // we add 1 to get values equal to the arg
    for (IntArrayList keys : head.values()) {
        addAllToSelection(keys, selection);
    }
    return selection;
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Long2ObjectSortedMap<V> headMap(long to) {
	return new Submap((0), true, to, false);
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
public Long2ObjectSortedMap<V> tailMap(long from) {
	return new Submap(from, false, (0), true);
}
 

import it.unimi.dsi.fastutil.longs.Long2ObjectSortedMap; //导入依赖的package包/类
/**
 * Creates a new tree map copying a given sorted map (and its
 * {@link Comparator}).
 *
 * @param m
 *            a type-specific sorted map to be copied into the new tree map.
 */

public Long2ObjectRBNavigableMap(final Long2ObjectSortedMap<V> m) {
	this(m.comparator());
	putAll(m);
}