package no.uio.ifi.refaktor.analyze.collectors;

import no.uio.ifi.refaktor.prefix.Prefix;
import no.uio.ifi.refaktor.utils.CompilationUnitTextSelection;

public class LongestCommonPrefixCollector extends AbstractPrefixCollector {
	private Prefix longestCommonPrefix;

	public LongestCommonPrefixCollector(CompilationUnitTextSelection selection) {
		super(selection);
	}

	protected void registerPrefix(Prefix prefix) {
		if (longestCommonPrefix == null) {
			longestCommonPrefix = prefix;
		} else {
			longestCommonPrefix = longestCommonPrefix.intersectWith(prefix);
		}
	}

	public Prefix getProperty() {
		return longestCommonPrefix;
	}

	@Override
	public void clearData() {
		longestCommonPrefix = null;
	}
}