net.amygdalum.util.text.CharRangeAccumulator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of compilerutils Show documentation

Utility classes needed for search and compiler applications

The newest version!

package net.amygdalum.util.text;

import static java.lang.Character.MAX_VALUE;
import static java.lang.Character.MIN_VALUE;

import java.util.List;

import net.amygdalum.util.builders.Lists;

public class CharRangeAccumulator {

	private List ranges;

	public CharRangeAccumulator() {
		ranges = Lists.of(new CharRange(MIN_VALUE, MAX_VALUE));
	}

	public List getRanges() {
		return ranges;
	}

	public void split(char from, char to) {
		for (int i = 0; i < ranges.size(); i++) {
			CharRange currentRange = ranges.get(i);
			if (currentRange.contains(from) && currentRange.contains(to)) {
				i = replace(i, currentRange.splitAround(from, to));
			} else if (currentRange.contains(from)) {
				i = replace(i, currentRange.splitBefore(from));
			} else if (currentRange.contains(to)) {
				i = replace(i, currentRange.splitAfter(to));
			}
		}
	}

	private int replace(int i, List replacement) {
		ranges.remove(i);
		ranges.addAll(i, replacement);
		return i + replacement.size() - 1;
	}

}