/*
* Copyright (C) 2007 The Guava Authors
*
* 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 flow;
final class Preconditions {
private Preconditions() {
throw new AssertionError();
}
/**
* @throws java.lang.IllegalArgumentException if condition is false.
*/
static void checkArgument(boolean condition, String errorMessage) {
if (!condition) {
throw new IllegalArgumentException(errorMessage);
}
}
/**
* @param reference an object reference
* @return the non-null reference that was validated
* @throws NullPointerException if {@code reference} is null
*/
static <T> T checkNotNull(T reference, String errorMessage, Object... args) {
if (reference == null) {
throw new NullPointerException(String.format(errorMessage, args));
}
return reference;
}
}