org.apache.ivy.util.Checks Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.ivy.util;
import java.io.File;
/**
* Utility class used to perform some checks.
*/
public final class Checks {
private Checks() {
}
/**
* Checks that an object is not null, and throw an exception if the object is null.
*
* @param o
* the object to check
* @param objectName
* the name of the object to check. This name will be used in the exception message.
* @throws IllegalArgumentException
* if the object is null
*/
public static void checkNotNull(Object o, String objectName) {
if (o == null) {
throw new IllegalArgumentException(objectName + " must not be null");
}
}
public static File checkAbsolute(File f, String fileName) {
checkNotNull(f, fileName);
if (!f.isAbsolute()) {
throw new IllegalArgumentException(fileName + " must be absolute: " + f.getPath());
}
return f;
}
public static File checkAbsolute(String path, String fileName) {
checkNotNull(path, fileName);
File f = new File(path);
if (!f.isAbsolute()) {
throw new IllegalArgumentException(fileName + " must be absolute: " + path);
}
return f;
}
}