net.sf.jsignpdf.PdfExtraInfo.java Source code

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Here is the source code for net.sf.jsignpdf.PdfExtraInfo.java

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/*
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is 'JSignPdf, a free application for PDF signing'.
 *
 * The Initial Developer of the Original Code is Josef Cacek.
 * Portions created by Josef Cacek are Copyright (C) Josef Cacek. All Rights Reserved.
 *
 * Contributor(s): Josef Cacek.
 *
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU Lesser General Public License, version 2.1 (the  "LGPL License"), in which case the
 * provisions of LGPL License are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL License and not to allow others to use
 * your version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the LGPL License. If you do not delete
 * the provisions above, a recipient may use your version of this file
 * under either the MPL or the LGPL License.
 */
package net.sf.jsignpdf;

import net.sf.jsignpdf.types.PageInfo;
import net.sf.jsignpdf.utils.PdfUtils;

import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfReader;

/**
 * Provides additional information for selected input PDF file.
 * 
 * @author Josef Cacek
 */
public class PdfExtraInfo {

    private BasicSignerOptions options;

    /**
     * @param anOptions
     */
    public PdfExtraInfo(BasicSignerOptions anOptions) {
        options = anOptions;
    }

    /**
     * Returns number of pages in PDF document. If error occures (file not found
     * or sth. similar) -1 is returned.
     * 
     * @return number of pages (or -1 if error occures)
     */
    public int getNumberOfPages() {
        int tmpResult = 0;
        PdfReader reader = null;
        try {
            try {
                reader = new PdfReader(options.getInFile(), options.getPdfOwnerPwdStrX().getBytes());
            } catch (Exception e) {
                try {
                    reader = new PdfReader(options.getInFile(), new byte[0]);
                } catch (Exception e2) {
                    // try to read without password
                    reader = new PdfReader(options.getInFile());
                }
            }
            tmpResult = reader.getNumberOfPages();
        } catch (Exception e) {
            tmpResult = -1;
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (Exception e) {
                }
            }
        }

        return tmpResult;
    }

    /**
     * Returns page info.
     * 
     * @param aPage
     *            number of page for which size should be returned
     * @return FloatPoint or null
     */
    public PageInfo getPageInfo(int aPage) {
        PageInfo tmpResult = null;
        PdfReader reader = null;
        try {
            reader = PdfUtils.getPdfReader(options.getInFile(), options.getPdfOwnerPwdStrX().getBytes());
            final Rectangle tmpRect = reader.getPageSizeWithRotation(aPage);
            if (tmpRect != null) {
                tmpResult = new PageInfo(tmpRect.getRight(), tmpRect.getTop());
            }
        } catch (Exception e) {
            // nothing to do
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (Exception e) {
                }
            }
        }

        return tmpResult;
    }
}