de.intarsys.pdf.st.STXRefEntryOccupied 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.st;

import java.io.IOException;

import de.intarsys.pdf.cos.COSObject;
import de.intarsys.pdf.crypt.ISystemSecurityHandler;
import de.intarsys.pdf.parser.COSLoadException;

/**
 * Represents an occupied object entry in a pdf xref table.
 */
public class STXRefEntryOccupied extends STXRefEntry {
	/** The offset of the entry */
	private long offset;

	public STXRefEntryOccupied(int objectNumber, int generationNumber,
			long offset) {
		super(objectNumber, generationNumber);
		this.offset = offset;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.storage.STXRefEntry#accept(de.intarsys.pdf.storage.IXRefEntryVisitor)
	 */
	@Override
	public void accept(IXRefEntryVisitor visitor)
			throws XRefEntryVisitorException {
		visitor.visitFromOccupied(this);
	}

	@Override
	public STXRefEntry copy() {
		return new STXRefEntryOccupied(getObjectNumber(),
				getGenerationNumber(), getOffset());
	}

	@Override
	public STXRefEntryOccupied fill(int pos) {
		setOffset(pos);
		return this;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.storage.STXRefEntry#getColumn1()
	 */
	@Override
	public long getColumn1() {
		return getOffset();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.storage.STXRefEntry#getColumn2()
	 */
	@Override
	public int getColumn2() {
		return getGenerationNumber();
	}

	public long getOffset() {
		return offset;
	}

	/**
	 * @see de.intarsys.pdf.st.STXRefEntry#isFree()
	 */
	@Override
	public boolean isFree() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.storage.STXRefEntry#loadObject(de.intarsys.pdf.cos.COSIndirectObject)
	 */
	@Override
	public COSObject load(STDocument doc, ISystemSecurityHandler securityHandler)
			throws IOException, COSLoadException {
		doc.getRandomAccess().seek(getOffset());
		return doc.getParser().parseIndirectObject(doc.getRandomAccess(),
				securityHandler);
	}

	public void setOffset(long offset) {
		this.offset = offset;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.pdf.writer.XRefEntry#unlink()
	 */
	@Override
	protected void unlink() {
		// do nothing
	}
}