/*******************************************************************************
* Copyright 2013 Naver Business Platform Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.handmark.pulltorefresh.library.internal;
public class Assert {
private static final String MESSAGE_FORMAT = "\"%s\" argument must be not null.";
public static void notNull(Object object, String argName) {
if (object == null) {
// When a parameter is null,
// it throws a NullPointerException instead of an IllegalArgumentException.
// This rule is recommended by the item 62 on Effective Java 2nd edition as follows.
// "If a caller passes null in some parameter for which null values are prohibited,
// convention dictates that NullPointerException be thrown rather than IllegalArgumentException."
throw new NullPointerException(String.format(MESSAGE_FORMAT, argName));
}
}
}