org.apache.wicket.util.lang.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.wicket.util.lang;
import org.apache.wicket.util.string.Strings;
/**
*
*/
public class Checks
{
/**
* Checks value is not null
*
* @param argument
* @param message
* @param params
* @throws IllegalStateException
*/
public static void notNull(final Object argument, final String message, final Object... params)
{
if (argument == null)
{
throw new IllegalStateException(Args.format(message, params));
}
}
/**
* Checks argument is not empty (not null and has a non-whitespace character)
*
* @param argument
* @param message
* @param params
* @throws IllegalStateException
*/
public static void notEmpty(final String argument, final String message, final Object... params)
{
if (Strings.isEmpty(argument))
{
throw new IllegalStateException(Args.format(message, params));
}
}
/**
* Checks if argument is within a range
*
* @param
* @param min
* @param max
* @param value
* @param message
* @throws IllegalStateException
*/
public static > void withinRange(final T min, final T max,
final T value, final String message)
{
notNull(min, message);
notNull(max, message);
if ((value.compareTo(min) < 0) || (value.compareTo(max) > 0))
{
throw new IllegalStateException(message);
}
}
/**
* Checks value is not null
*
* @param argument
* @param name
* @throws IllegalStateException
*/
public static void notNullShort(final Object argument, final String name)
{
notNull(argument, name + " may not be null.");
}
/**
* Checks argument is not empty (not null and has a non-whitespace character)
*
* @param argument
* @param name
* @throws IllegalStateException
*/
public static void notEmptyShort(final String argument, final String name)
{
notEmpty(argument, name + " may not be null or empty string.");
}
/**
* Checks if argument is within a range
*
* @param
* @param min
* @param max
* @param value
* @param name
* @throws IllegalStateException
*/
public static > void withinRangeShort(final T min, final T max,
final T value, final String name)
{
withinRange(min, max, value,
String.format("%s must have a value within [%s,%s], but was %s", name, min, max, value));
}
}