de.intarsys.pdf.st.STStreamXRefSection Maven / Gradle / Ivy

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/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.st;

import de.intarsys.pdf.cos.COSArray;
import de.intarsys.pdf.cos.COSDictionary;
import de.intarsys.pdf.cos.COSInteger;
import de.intarsys.pdf.cos.COSName;
import de.intarsys.pdf.cos.COSObject;
import de.intarsys.pdf.cos.COSStream;
import de.intarsys.pdf.cos.COSTrailer;
import de.intarsys.pdf.writer.COSWriter;

/**
 * A section in a stream XRef.
 */
public class STStreamXRefSection extends STXRefSection {
    public static final COSName DK_Type = COSName.constant("Type");

    public static final COSName CN_Type_XRef = COSName.constant("XRef");

    public static final COSName DK_Index = COSName.constant("Index");

    public static final COSName DK_W = COSName.constant("W");

    private COSStream stream;

    public STStreamXRefSection(STDocument doc) {
        super(doc);
        this.stream = COSStream.create(COSDictionary.create());
        cosGetDict().put(DK_Type, CN_Type_XRef);
    }

    public STStreamXRefSection(STDocument doc, long offset, COSStream stream) {
        super(doc, offset);
        this.stream = stream;
    }

    @Override
    public COSDictionary cosGetDict() {
        return stream.getDict();
    }

    @Override
    public COSObject cosGetObject() {
        return stream;
    }

    public COSStream cosGetStream() {
        return stream;
    }

    protected void cosSetStream(COSStream pStream) {
        this.stream = pStream;
    }

    @Override
    public STXRefSection createSuccessor() {
        STStreamXRefSection newXRefSection = new STStreamXRefSection(getDoc());
        newXRefSection.cosGetDict().put(COSTrailer.DK_ID, cosGetDict().get(COSTrailer.DK_ID).copyShallow());
        newXRefSection.cosGetDict().put(COSTrailer.DK_Root, cosGetDict().get(COSTrailer.DK_Root));
        newXRefSection.cosGetDict().put(COSTrailer.DK_Info, cosGetDict().get(COSTrailer.DK_Info));
        COSObject encrypt = cosGetDict().get(COSTrailer.DK_Encrypt);
        if (!encrypt.isIndirect()) {
            encrypt = encrypt.copyShallow();
        }
        newXRefSection.cosGetDict().put(COSTrailer.DK_Encrypt, encrypt);
        newXRefSection.setPrevious(this);
        return newXRefSection;
    }

    protected COSArray getIndex() {
        COSArray index = cosGetDict().get(DK_Index).asArray();
        if (index == null) {
            index = COSArray.create(2);
            index.add(COSInteger.create(0));
            index.add(COSInteger.create(getSize()));
        }
        return index;
    }

    protected COSArray getW() {
        return cosGetDict().get(DK_W).asArray();
    }

    @Override
    public AbstractXRefWriter getWriter(COSWriter cosWriter) {
        return new XRefStreamWriter(cosWriter);
    }

    @Override
    protected boolean isStreamed() {
        return true;
    }

    public void setIndex(COSArray index) {
        cosGetDict().put(DK_Index, index);
    }

    protected void setW(COSArray wArray) {
        cosGetDict().put(DK_W, wArray);
    }
}