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veraPDF PDF/A validation model implementation based on PDF parser.
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/**
 * This file is part of veraPDF Validation, a module of the veraPDF project.
 * Copyright (c) 2015, veraPDF Consortium 
 * All rights reserved.
 *
 * veraPDF Validation is free software: you can redistribute it and/or modify
 * it under the terms of either:
 *
 * The GNU General public license GPLv3+.
 * You should have received a copy of the GNU General Public License
 * along with veraPDF Validation as the LICENSE.GPL file in the root of the source
 * tree.  If not, see http://www.gnu.org/licenses/ or
 * https://www.gnu.org/licenses/gpl-3.0.en.html.
 *
 * The Mozilla Public License MPLv2+.
 * You should have received a copy of the Mozilla Public License along with
 * veraPDF Validation as the LICENSE.MPL file in the root of the source tree.
 * If a copy of the MPL was not distributed with this file, you can obtain one at
 * http://mozilla.org/MPL/2.0/.
 */
package org.verapdf.gf.model.impl.pd;

import org.verapdf.as.ASAtom;
import org.verapdf.cos.COSObjType;
import org.verapdf.cos.COSObject;
import org.verapdf.model.pdlayer.PDDestination;
import org.verapdf.pd.PDNameTreeNode;
import org.verapdf.pd.PDNamesDictionary;
import org.verapdf.tools.StaticResources;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Maxim Plushchov
 */
public class GFPDDestination extends GFPDObject implements PDDestination {

    public static final Logger LOGGER = Logger.getLogger(GFPDDestination.class.getCanonicalName());

    public static final String DESTINATION_TYPE = "PDDestination";

    public GFPDDestination(COSObject destination) {
        super(destination, DESTINATION_TYPE);
    }

    @Override
    public Boolean getisStructDestination() {
        COSObject destination = simpleCOSObject;
        if (destination.getType() == COSObjType.COS_STRING) {
            PDNamesDictionary namesDictionary = StaticResources.getDocument().getCatalog().getNamesDictionary();
            if (namesDictionary == null) {
                return false;
            }
            PDNameTreeNode dests = namesDictionary.getDests();
            if (dests != null) {
                COSObject dest = dests.getObject(destination.getString());
                if (dest == null) {
                    LOGGER.log(Level.WARNING, "Named destination " + destination.getString() + 
                            " not found in the Dests name tree in the Names dictionary");
                    return false;
                }
                destination = dest;
            }
        } else if (destination.getType() == COSObjType.COS_NAME) {
            COSObject dests = StaticResources.getDocument().getCatalog().getDests();
            if (dests != null) {
                COSObject dest = dests.getKey(destination.getName());
                if (dest == null) {
                    LOGGER.log(Level.WARNING, "Named destination " + destination.getName() + 
                            " not found in the Dests dictionary in the catalog");
                    return false;
                }
                destination = dest;
            }
        }
        if (destination.getType() == COSObjType.COS_DICT) {
            return destination.knownKey(ASAtom.SD);
        }
        if (destination.getType() == COSObjType.COS_ARRAY && destination.size() > 0) {
            return destination.at(0).knownKey(ASAtom.S);
        }
        return false;
    }
}