iText 5 itextpdf.jar Source Code

itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

✍: FYIcenter.com

com/itextpdf/text/io/MappedChannelRandomAccessSource.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Kevin Day, Bruno Lowagie, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General License for more
 * details. You should have received a copy of the GNU Affero General License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General License.
 *
 * In accordance with Section 7(b) of the GNU Affero General License, a covered
 * work must retain the producer line in every PDF that is created or
 * manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing a
 * commercial license. Buying such a license is mandatory as soon as you develop
 * commercial activities involving the iText software without disclosing the
 * source code of your own applications. These activities include: offering paid
 * services to customers as an ASP, serving PDFs on the fly in a web
 * application, shipping iText with a closed source product.
 *
 * For more information, please contact iText Software Corp. at this address:
 * sales@itextpdf.com
 */

package com.itextpdf.text.io;

import java.io.IOException;
import java.nio.channels.FileChannel;

/**
 * A RandomAccessSource that represents a memory mapped section of an underlying FileChannel.
 * This source can be closed and will automatically re-open as needed.
 * This class is an internal implementation detail of the {@link FileChannelRandomAccessSource} class and
 * shouldn't be used by general iText users.
 * @since 5.3.5
 */
class MappedChannelRandomAccessSource implements RandomAccessSource {
	/**
	 * The underlying channel
	 */
	private final FileChannel channel;
	/**
	 * The offset into the channel that this source maps to
	 */
	private final long offset;
	/**
	 * The number of bytes this source maps to
	 */
	private final long length;
	
	/**
	 * If the map is active, the actual map.  null other wise.
	 */
	private ByteBufferRandomAccessSource source;
	
	/**
	 * Create a new source based on the channel.  Mapping will not occur until data is actually read.
	 * @param channel the underlying channel
	 * @param offset the offset of the map
	 * @param length the length of the map
	 */
	public MappedChannelRandomAccessSource(FileChannel channel, long offset, long length) {
		if (offset < 0) 
			throw new IllegalArgumentException(offset + " is negative");
		if (length <= 0) 
			throw new IllegalArgumentException(length + " is zero or negative");
		
		this.channel = channel;
		this.offset = offset;
		this.length = length;
		this.source = null;
	}

	/**
	 * Map the region of the channel
	 * @throws IOException if there is a problem with creating the map
	 */
	void open() throws IOException {
		if (source != null)
			return;
			
		if (!channel.isOpen())
			throw new IllegalStateException("Channel is closed");

		try{
			source = new ByteBufferRandomAccessSource(channel.map(FileChannel.MapMode.READ_ONLY, offset, length));
		} catch (IOException e){
			if (exceptionIsMapFailureException(e))
				throw new MapFailedException(e);
			throw e;
		}
	}
	
    /**
     * Utility method that determines whether a given IOException is the result
     * of a failure to map a memory mapped file.  It would be better if the runtime
     * provided a special exception for this case, but it doesn't, so we have to rely
     * on parsing the exception message.
     * @param e the exception to check
     * @return true if the exception was the result of a failure to map a memory mapped file
     */
    private static boolean exceptionIsMapFailureException(IOException e){
        if (e.getMessage() != null && e.getMessage().indexOf("Map failed") >= 0)
            return true;

        return false;
    }
	
	/**
	 * {@inheritDoc}
	 */
	public int get(long position) throws IOException {
		if (source == null)
			throw new IOException("RandomAccessSource not opened");
		return source.get(position);
	}

	/**
	 * {@inheritDoc}
	 */
	public int get(long position, byte[] bytes, int off, int len) throws IOException {
		if (source == null)
			throw new IOException("RandomAccessSource not opened");
		return source.get(position, bytes, off, len);
	}

	/**
	 * {@inheritDoc}
	 */
	public long length() {
		return length;
	}

	/**
	 * {@inheritDoc}
	 */
	public void close() throws IOException {
		if (source == null)
			return;
		source.close();
		source = null;
	}

	@Override
	public String toString() {
		return getClass().getName() + " (" + offset + ", " + length + ")";
	}
}

com/itextpdf/text/io/MappedChannelRandomAccessSource.java

 

⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

⇐ iText layout.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation

2021-07-03, 47878👍, 0💬