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Checks.java
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Checks.java
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/*
* Copyright 2015-2017 Austin Keener & Michael Ritter & Florian Spieß
*
* 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 net.dv8tion.jda.core.utils;
import java.util.Collection;
public class Checks
{
public static void check(final boolean expression, final String message)
{
if (!expression)
throw new IllegalArgumentException(message);
}
public static void check(final boolean expression, final String message, final Object... args)
{
if (!expression)
throw new IllegalArgumentException(String.format(message, args));
}
public static void check(final boolean expression, final String message, final Object arg)
{
if (!expression)
throw new IllegalArgumentException(String.format(message, arg));
}
public static void notNull(final Object argument, final String name)
{
if (argument == null)
throw new IllegalArgumentException(name + " may not be null");
}
public static void notEmpty(final CharSequence argument, final String name)
{
notNull(argument, name);
if (Helpers.isEmpty(argument))
throw new IllegalArgumentException(name + " may not be empty");
}
public static void notBlank(final CharSequence argument, final String name)
{
notNull(argument, name);
if (Helpers.isBlank(argument))
throw new IllegalArgumentException(name + " may not be blank");
}
public static void noWhitespace(final CharSequence argument, final String name)
{
notNull(argument, name);
if (Helpers.containsWhitespace(argument))
throw new IllegalArgumentException(name + " may not contain blanks");
}
public static void notEmpty(final Collection<?> argument, final String name)
{
notNull(argument, name);
if (argument.isEmpty())
throw new IllegalArgumentException(name + " may not be empty");
}
public static void noneNull(final Collection<?> argument, final String name)
{
notNull(argument, name);
argument.forEach(it -> notNull(it, name));
}
public static <T extends CharSequence> void noneEmpty(final Collection<T> argument, final String name)
{
notNull(argument, name);
argument.forEach(it -> notEmpty(it, name));
}
public static <T extends CharSequence> void noneBlank(final Collection<T> argument, final String name)
{
notNull(argument, name);
argument.forEach(it -> notBlank(it, name));
}
public static <T extends CharSequence> void noneContainBlanks(final Collection<T> argument, final String name)
{
notNull(argument, name);
argument.forEach(it -> noWhitespace(it, name));
}
public static void positive(final int n, final String name)
{
if (n <= 0)
throw new IllegalArgumentException(name + " may not be negative or zero");
}
public static void positive(final long n, final String name)
{
if (n <= 0)
throw new IllegalArgumentException(name + " may not be negative or zero");
}
public static void notNegative(final int n, final String name)
{
if (n < 0)
throw new IllegalArgumentException(name + " may not be negative");
}
public static void notNegative(final long n, final String name)
{
if (n < 0)
throw new IllegalArgumentException(name + " may not be negative");
}
}