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This project is simply a unified way of including common JS libraries within Wicket so that you don't have to bundle them in your application, and they aren't deployed with dozens of jars that may use them, but they are deployed in only one.

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/**
 * Copyright (C) 2009 Uwe Schaefer 
 *
 * 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.wicketstuff.jslibraries.util;

import java.util.EnumSet;

/**
 * A bunch of common Assertions.
 */
public class Assert
{
	private Assert()
	{
		// hide
	}

	public static final void isNotNull(final Object reference)
	{
		Assert.isNotNull(reference, "Reference was null");
	}

	public static final void isNotNull(final Object reference, final String msg)
	{
		if (reference == null)
		{
			Assert.raiseError(msg);
		}
	}

	public static final void isNotNullAndNotEmpty(final String reference)
	{
		Assert.isNotNullAndNotEmpty(reference, "Reference was null or empty");
	}

	public static final void isNotNullAndNotEmpty(final String reference, final String msg)
	{
		if ((reference == null) || (reference.length() == 0))
		{
			Assert.raiseError(msg);
		}
	}

	public static final void isFalse(final boolean value)
	{
		Assert.isFalse(value, "Value was true");
	}

	public static final void isFalse(final boolean value, final String msg)
	{
		if (value)
		{
			Assert.raiseError(msg);
		}
	}

	public static final void isNotFalse(final boolean value)
	{
		Assert.isNotFalse(value, "Value was false");
	}

	public static final void isNotFalse(final boolean value, final String msg)
	{
		if (!value)
		{
			Assert.raiseError(msg);
		}
	}

	public static final void isTrue(final boolean value)
	{
		Assert.isTrue(value, "Value was false");
	}

	public static final void isTrue(final boolean value, final String msg)
	{
		if (!value)
		{
			Assert.raiseError(msg);
		}
	}

	public static final void isNotTrue(final boolean value)
	{
		Assert.isNotTrue(value, "Value was true");
	}

	public static final void isNotTrue(final boolean value, final String msg)
	{
		if (value)
		{
			Assert.raiseError(msg);
		}
	}

	public static final void raiseError(final String error)
	{
		throw new AssertionFailedException(error);
	}

	public static final void raiseError(final String error, final Exception e)
	{
		throw new AssertionFailedException(error, e);
	}

	private static class AssertionFailedException extends RuntimeException
	{
		private static final long serialVersionUID = 1L;

		public AssertionFailedException(final String detail)
		{
			super(detail);
		}

		public AssertionFailedException(final String detail, final Throwable e)
		{
			super(detail, e);
		}
	}

	public static void isEqual(final Object obj1, final Object obj2)
	{
		if ((obj1 == null) && (obj2 == null))
		{
			return;
		}
		if ((obj1 != null) && (!obj1.equals(obj2)))
		{
			Assert.raiseError("'" + obj1 + "' and '" + obj2 + "' are not equal");
		}
	}

	public static void parameterNotNull(final Object reference, final String nameOfParameter)
	{
		if (reference == null)
		{
			Assert.raiseError("Parameter '" + nameOfParameter + "' is not expected to be null.");
		}
	}

	public static void isNull(final Object object, final String string)
	{
		if (object != null)
		{
			Assert.raiseError(string);
		}
	}

	public static void parameterInRange(final int value, final int min, final int max,
		final String string)
	{
		Assert.isTrue((min <= value) && (value <= max), "Parameter '" + string +
			"' must be in range of " + min + " <= " + string + " <= " + max +
			". Current value was " + value);

	}

	public static void parameterLegal(final boolean condition, final String parameter)
	{
		Assert.isTrue(condition, "Parameter '" + parameter + "' is not legal.");
	}

	public static void parameterNotEmpty(final String reference, final String nameOfParameter)
	{

		if ("".equals(reference))
		{
			Assert.raiseError("Parameter '" + nameOfParameter + "' is not expected to be empty.");
		}
	}

	public static > void enumContains(final EnumSet supportedQueryMode,
		final T mode)
	{
		Assert.isTrue(true, "");
	}
}