Util.java

/* Copyright (C) 2013 Interactive Brokers LLC. All rights reserved.  This code is subject to the terms
 * and conditions of the IB API Non-Commercial License or the IB API Commercial License, as applicable. */

package com.ib.client;

import java.util.Vector;

public class Util {

	public static boolean StringIsEmpty(String str) {
		return str == null || str.length() == 0;
	}

	public static String NormalizeString(String str) {
		return str != null ? str : "";
	}

	public static int StringCompare(String lhs, String rhs) {
		return NormalizeString(lhs).compareTo(NormalizeString(rhs));
	}

	public static int StringCompareIgnCase(String lhs, String rhs) {
		return NormalizeString(lhs).compareToIgnoreCase(NormalizeString(rhs));
	}

	public static boolean VectorEqualsUnordered(Vector lhs, Vector rhs) {

		if (lhs == rhs)
			return true;

		int lhsCount = lhs == null ? 0 : lhs.size();
		int rhsCount = rhs == null ? 0 : rhs.size();

		if (lhsCount != rhsCount)
			return false;

		if (lhsCount == 0)
			return true;

		boolean[] matchedRhsElems = new boolean[rhsCount];

		for (int lhsIdx = 0; lhsIdx < lhsCount; ++lhsIdx) {
			Object lhsElem = lhs.get(lhsIdx);
			int rhsIdx = 0;
			for (; rhsIdx < rhsCount; ++rhsIdx) {
				if (matchedRhsElems[rhsIdx]) {
					continue;
				}
				if (lhsElem.equals(rhs.get(rhsIdx))) {
					matchedRhsElems[rhsIdx] = true;
					break;
				}
			}
			if (rhsIdx >= rhsCount) {
				// no matching elem found
				return false;
			}
		}

		return true;
	}

	public static String IntMaxString(int value) {
		return (value == Integer.MAX_VALUE) ? "" : "" + value;
	}

	public static String DoubleMaxString(double value) {
		return (value == Double.MAX_VALUE) ? "" : "" + value;
	}

}