TreeObjectPath.java

package com.link_intersystems.gitdirstat.domain;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.collections4.iterators.IteratorEnumeration;

public class TreeObjectPath {

	private static final char PATH_SEPARATOR = '/';
	private List<TreeObject> path = new ArrayList<TreeObject>();
	private String pathname;
	private String rootRelativePathname;

	TreeObjectPath(TreeObject treeObject) {
		path.add(treeObject);
	}

	void prepend(TreeObjectPath otherPath) {
		this.path.addAll(0, otherPath.path);
	}

	public String getName() {
		TreeObject lastPathSegment = this.path.get(this.path.size() - 1);
		return lastPathSegment.getName();
	}

	public String getPathname() {
		if (pathname == null) {
			StringBuilder pathname = new StringBuilder();
			Iterator<TreeObject> pathIterator = this.path.iterator();
			while (pathIterator.hasNext()) {
				TreeObject treeObject = pathIterator.next();
				pathname.append(treeObject.getName());
				if (pathIterator.hasNext()) {
					pathname.append(PATH_SEPARATOR);
				}
			}
			this.pathname = pathname.toString();
		}
		return pathname;
	}

	public String getRootRelativePathname() {
		if (rootRelativePathname == null) {
			StringBuilder pathname = new StringBuilder();
			Iterator<TreeObject> pathIterator = this.path.iterator();
			if (pathIterator.hasNext()) {
				pathIterator.next();
			}

			while (pathIterator.hasNext()) {
				TreeObject treeObject = pathIterator.next();

				pathname.append(treeObject.getName());
				if (pathIterator.hasNext()) {
					pathname.append(PATH_SEPARATOR);
				}
			}
			this.rootRelativePathname = pathname.toString();
		}
		return rootRelativePathname;
	}

	public Enumeration<TreeObject> enumerate() {
		return new IteratorEnumeration<TreeObject>(path.iterator());
	}

	@Override
	public String toString() {
		return getRootRelativePathname();
	}
}