sc-resources/数据结构(双语)/数据结构 day16【瑞客论坛 www.ruike1.com】/代码/06-二叉搜索树2/src/com/mj/printer/BinaryTrees.java

package com.mj.printer;

/**
 * 
 * @author MJ Lee
 *
 */
public final class BinaryTrees {

	private BinaryTrees() {
	}

	public static void print(BinaryTreeInfo tree) {
		print(tree, null);
	}

	public static void println(BinaryTreeInfo tree) {
		println(tree, null);
	}

	public static void print(BinaryTreeInfo tree, PrintStyle style) {
		if (tree == null || tree.root() == null) return;
		printer(tree, style).print();
	}

	public static void println(BinaryTreeInfo tree, PrintStyle style) {
		if (tree == null || tree.root() == null) return;
		printer(tree, style).println();
	}

	public static String printString(BinaryTreeInfo tree) {
		return printString(tree, null);
	}

	public static String printString(BinaryTreeInfo tree, PrintStyle style) {
		if (tree == null || tree.root() == null) return null;
		return printer(tree, style).printString();
	}

	private static Printer printer(BinaryTreeInfo tree, PrintStyle style) {
		if (style == PrintStyle.INORDER) return new InorderPrinter(tree);
		return new LevelOrderPrinter(tree);
	}

	public enum PrintStyle {
		LEVEL_ORDER, INORDER
	}
}