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Kuali Utilities

There is a newer version: 4.4.17

package org.kuali.common.util;

public class ObjectUtils {

	/**
	 * 
	 * This method returns true if the toString() methods on both objects return matching strings AND both objects are the exact same runtime type.
	 * 
	 * 
	 * 
	 * Returns true immediately if main==other (ie they are the same object).
	 * 
	 * 
	 * 
	 * Returns false immediately if other==null or is a different runtime type than main.
	 * 
	 * 
	 * 
	 * If neither one is null, and both are the exact same runtime type, then compare the toString() methods
	 * 
	 * 
	 * @param main
	 *            The object other is being compared to.
	 * @param other
	 *            The object being examined for equality with main.
	 * 
	 * @throws NullPointerException
	 *             If main is null or main.toString() returns null
	 */
	public static boolean equalsByToString(Object main, Object other) {

		// Main can't be null
		if (main == null) {
			throw new NullPointerException("main is null");
		}

		// They are the same object
		if (main == other) {
			return true;
		}

		// Only bother comparing the toString() methods if they are the exact same runtime type
		if (other != null && main.getClass() == other.getClass()) {
			return main.toString().equals(other.toString());
		} else {
			return false;
		}
	}
}