org.jpedal.io.types.DirectDictionaryToObject Maven / Gradle / Ivy

/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
     This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


 *
 * ---------------
 * DirectDictionaryToObject.java
 * ---------------
 */
package org.jpedal.io.types;

import org.jpedal.io.ObjectDecoder;

import static org.jpedal.io.ObjectDecoder.debugFastCode;
import static org.jpedal.io.ObjectDecoder.padding;

import org.jpedal.io.PdfFileReader;
import org.jpedal.objects.raw.ObjectFactory;
import org.jpedal.objects.raw.PdfObject;

/**
 *
 */
public class DirectDictionaryToObject {


    public static int convert(final PdfObject pdfObject, String objectRef, int i, final byte[] raw, final int PDFkeyInt, final PdfFileReader objectReader) {

        //convert data to new Dictionary object
        final PdfObject valueObj;

        if (PDFkeyInt == -1) {
            valueObj = pdfObject;

            //if only 1 item use that ref not parent and indirect (ie <>)
            int objCount = 0;
            int refStarts = -1;
            int refEnds = -1;
            final int length = raw.length;
            if (raw[0] == '<') {
                for (int ii = 0; ii < length; ii++) {

                    //avoid binary data
                    if (raw[ii] == 's' && raw[ii + 1] == 't' && raw[ii + 2] == 'r' && raw[ii + 3] == 'e' && raw[ii + 4] == 'a' && raw[ii + 5] == 'm') {
                        break;
                    }

                    //count keys
                    if (raw[ii] == '/' && ((length - ii > 2) || (raw[ii + 1] != 'L' && raw[ii + 2] != 'e' && raw[ii + 3] != 'n'))) {
                        objCount++;
                    }
                    //find start of ref
                    if (objCount == 1) {
                        if (refStarts == -1) {
                            if (raw[ii] > '0' && raw[ii] < '9') {
                                refStarts = ii;
                            }
                        } else {
                            if (raw[ii] == 'R') {
                                refEnds = ii + 1;
                            }
                        }
                    }
                }

                if (objCount == 1 && refStarts != -1 && refEnds != -1) {
                    objectRef = new String(raw, refStarts, refEnds - refStarts);
                    valueObj.setRef(objectRef);
                }
            }

        } else {
            valueObj = ObjectFactory.createObject(PDFkeyInt, objectRef, pdfObject.getObjectType(), pdfObject.getID());
            valueObj.setInCompressedStream(pdfObject.isInCompressedStream());
            valueObj.setID(PDFkeyInt);

            //if it is cached, we need to copy across data so in correct Obj
            // (we read data before we created object so in wrong obj at this point)
            if (pdfObject.isCached()) {
                valueObj.moveCacheValues(pdfObject);
            }

            if (debugFastCode) {
                System.out.println("valueObj=" + valueObj + " pdfObject=" + pdfObject + " PDFkeyInt=" + PDFkeyInt + ' ' + pdfObject.getID() + ' ' + pdfObject.getParentID());
            }
        }

        if (debugFastCode) {
            System.out.println(padding + "Reading [<>] to " + valueObj + " into " + pdfObject + " i=" + i);
        }

        final ObjectDecoder objDecoder = new ObjectDecoder(objectReader);
        i = objDecoder.readDictionaryAsObject(valueObj, i, raw);

        //needed to ensure >>>> works
        if (i < raw.length && raw[i] == '>') {
            i--;
        }

        if (debugFastCode) {
            System.out.println(padding + "data " + valueObj + " into pdfObject=" + pdfObject + " i=" + i);
        }

        //store value (already set above for -1
        if (PDFkeyInt != -1) {
            pdfObject.setDictionary(PDFkeyInt, valueObj);
        }

        //roll on to end
        final int count = raw.length;
        while (i < count - 1 && raw[i] == 62 && raw[i + 1] == 62) { //
            i++;
            if (i + 1 < raw.length && raw[i + 1] == 62) //allow for >>>>
            {
                break;
            }
        }
        return i;
    }

}