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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;

import java.util.Map;

import de.intarsys.tools.collection.EmptyIterator;

/**
 * Primitive COS datatypes. These objects are "immutable" in their PDF
 * semantics. The container may change!
 * 
 */
abstract public class COSPrimitiveObject extends COSObject {
	protected COSPrimitiveObject() {
		super();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#addObjectListener(de.intarsys.pdf.cos.ICOSObjectListener)
	 */
	@Override
	public void addObjectListener(ICOSObjectListener listener) {
		// no op for immutable primitives
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#basicIterator()
	 */
	@Override
	public java.util.Iterator basicIterator() {
		return EmptyIterator.UNIQUE;
	}

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

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSDocumentElement#copyDeep(java.util.Map)
	 */
	@Override
	public COSObject copyDeep(Map copied) {
		return copyShallow();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#isDangling()
	 */
	@Override
	public boolean isDangling() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#isObjectListenerAvailable()
	 */
	@Override
	public boolean isObjectListenerAvailable() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#isPrimitive()
	 */
	@Override
	public boolean isPrimitive() {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#iterator()
	 */
	@Override
	public java.util.Iterator iterator() {
		return EmptyIterator.UNIQUE;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSDocumentElement#register(de.intarsys.pdf.cos.COSDocument)
	 */
	@Override
	protected void registerWith(COSDocument doc) {
		// nothing to do
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#removeObjectListener(de.intarsys.pdf.cos.ICOSObjectListener)
	 */
	@Override
	public void removeObjectListener(ICOSObjectListener listener) {
		// no op for immutable primitives
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.cos.COSObject#triggerChanged(java.lang.Object,
	 *      de.intarsys.pdf.cos.COSObject, de.intarsys.pdf.cos.COSObject)
	 */
	@Override
	protected void triggerChanged(Object slot, Object oldValue, Object newValue) {
		// ignore
	}
}