de.intarsys.pdf.cos.COSBoolean Maven / Gradle / Ivy

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/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.cos;

/**
 * Abstract class for the representation of boolean values
 */
abstract public class COSBoolean extends COSPrimitiveObject {

	public static final COSBoolean TRUE = (COSBoolean) COSBoolean.create(true)
			.beConstant();

	public static final COSBoolean FALSE = (COSBoolean) COSBoolean
			.create(false).beConstant();

	static public COSBoolean create(boolean value) {
		if (value) {
			return COSTrue.create();
		}
		return COSFalse.create();
	}

	protected COSBoolean() {
		super();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#accept(de.intarsys.pdf.cos.ICOSObjectVisitor)
	 */
	@Override
	public java.lang.Object accept(ICOSObjectVisitor visitor)
			throws COSVisitorException {
		return visitor.visitFromBoolean(this);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#asBoolean()
	 */
	@Override
	public COSBoolean asBoolean() {
		return this;
	}

	/**
	 * The boolean value for this.
	 * 
	 * @return The boolean value for this.
	 */
	abstract public boolean booleanValue();
}