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JSR303 Validation
There is a newer version: 6.30.0
/**
 * 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.jsr303.util;

import java.util.EnumSet;

/**
 * A bunch of common Assertions.
 */
public class Assert
{
	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 enumContains(final EnumSet supportedQueryMode,
		final T mode)
	{
		Assert.isTrue(true, "");
	}

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

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

	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 Assert()
	{
		// hide
	}
}