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An Open Source JavaFX PDF Viewer
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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2015 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


 *
 * ---------------
 * PdfObjectCache.java
 * ---------------
 */
package org.jpedal.parser;

import org.jpedal.exception.PdfException;
import org.jpedal.objects.raw.*;
import org.jpedal.utils.StringUtils;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * caches for data
 */
public class PdfObjectCache {

    public static final int ColorspacesUsed=1;
    public static final int Colorspaces=2;
    public static final int ColorspacesObjects=3;
    public static final int GlobalShadings=4;
    public static final int LocalShadings=5;

    //init size of maps
    private static final int initSize=50;

    //int values for all colorspaces
    private final Map colorspacesUsed=new HashMap(initSize);

    private final Map colorspacesObjects=new HashMap(initSize);

    /**colors*/
    private Map colorspaces=new HashMap(initSize);

    private Map globalXObjects = new HashMap(initSize),localXObjects=new HashMap(initSize);

    public final Map XObjectColorspaces=new HashMap(initSize);

    public final Map patterns=new HashMap(initSize);
    private final Map globalShadings=new HashMap(initSize);
    private Map localShadings=new HashMap(initSize);

    final Map imposedImages = new HashMap(initSize);

    public PdfObject groupObj;

    /**fonts*/
    public Map unresolvedFonts=new HashMap(initSize);
    public Map directFonts=new HashMap(initSize);
    public Map resolvedFonts=new HashMap(initSize);

    /**GS*/
    Map GraphicsStates=new HashMap(initSize);

    public PdfObjectCache copy() {

        final PdfObjectCache copy=new PdfObjectCache();

        copy.localShadings=localShadings;
        copy.unresolvedFonts=unresolvedFonts;
        copy.GraphicsStates= GraphicsStates;
        copy.directFonts= directFonts;
        copy.resolvedFonts= resolvedFonts;
        copy.colorspaces= colorspaces;

        copy.localXObjects= localXObjects;
        copy.globalXObjects= globalXObjects;

        copy.groupObj= groupObj;


        return copy;

    }

    public PdfObjectCache() {}

    public void put(final int type, final int key, final Object value){
        switch(type){
            case ColorspacesUsed:
                colorspacesUsed.put(key,value);
                break;
            case ColorspacesObjects:
                colorspacesObjects.put(key,value);
                break;
        }
    }
    
    public void put(final int type, final String key, final Object value){
        switch(type){
            case ColorspacesUsed:
                colorspacesUsed.put(key,value);
                break;
            case ColorspacesObjects:
                colorspacesObjects.put(key,value);
                break;
        }
    }
    
    public boolean containsKey(final int key, final Object value){

        boolean returnValue=true;

        switch(key){
            case ColorspacesObjects:
                returnValue=colorspacesObjects.containsKey(key);
                break;
        }

        return returnValue;
    }

    public Iterator iterator(final int type){

        Iterator returnValue=null;

        switch(type){
            case ColorspacesUsed:
                returnValue=colorspacesUsed.keySet().iterator();
                break;
            case ColorspacesObjects:
                returnValue=colorspacesObjects.keySet().iterator();
                break;
        }

        return returnValue;
    }

    public Object get(final int key, final Object value){

        Object returnValue=null;

        switch(key){
            case ColorspacesUsed:
                returnValue=colorspacesUsed.get(value);
                break;
            case Colorspaces:
                returnValue=colorspaces.get(value);
                break;
            case ColorspacesObjects:
                returnValue=colorspacesObjects.get(value);
                break;
            case GlobalShadings:
                returnValue=globalShadings.get(value);
                break;
            case LocalShadings:
                returnValue=localShadings.get(value);
                break;

        }

        return returnValue;
    }

    public void resetFonts() {
        resolvedFonts.clear();
        unresolvedFonts.clear();
        directFonts.clear();
    }

    public PdfObject getXObjects(final String localName) {

        PdfObject XObject = (PdfObject) localXObjects.get(localName);
        if (XObject == null) {
            XObject = (PdfObject) globalXObjects.get(localName);
        }

        return XObject;
    }

    public void readResources(final PdfObject Resources, final boolean resetList)  throws PdfException{


        //decode
        final String[] names={"ColorSpace","ExtGState","Font", "Pattern","Shading","XObject"};
        final int[] keys={PdfDictionary.ColorSpace, PdfDictionary.ExtGState, PdfDictionary.Font,
                PdfDictionary.Pattern, PdfDictionary.Shading,PdfDictionary.XObject};

        for(int ii=0;ii