org.verapdf.features.pb.objects.PBImageXObjectFeaturesObjectAdapter Maven / Gradle / Ivy
/**
* This file is part of veraPDF Library PDF Box Features Reporting, a module of the veraPDF project.
* Copyright (c) 2015, veraPDF Consortium
* All rights reserved.
*
* veraPDF Library PDF Box Features Reporting 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 Library PDF Box Features Reporting 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 Library PDF Box Features Reporting 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.features.pb.objects;
import org.apache.pdfbox.cos.*;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObjectProxy;
import org.verapdf.features.objects.ImageXObjectFeaturesObjectAdapter;
import org.verapdf.features.pb.tools.PBAdapterHelper;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
/**
* Features object for image xobject
*
* @author Maksim Bezrukov
*/
public class PBImageXObjectFeaturesObjectAdapter implements ImageXObjectFeaturesObjectAdapter {
private static final org.apache.log4j.Logger LOGGER = org.apache.log4j.Logger
.getLogger(PBImageXObjectFeaturesObjectAdapter.class);
private PDImageXObjectProxy imageXObject;
private String id;
private String colorSpaceChild;
private String maskChild;
private String sMaskChild;
private Set alternatesChild;
private List errors;
private List filterNames;
/**
* Constructs new shading features object
*
* @param imageXObject PDImageXObject which represents image xobject for feature
* report
* @param id id of the object
* @param colorSpaceChild colorSpace id which contains in this image xobject
* @param maskChild image xobject id which contains in this image xobject as it's
* mask
* @param sMaskChild image xobject id which contains in this image xobject as it's
* smask
* @param alternatesChild set of image xobject ids which contains in this image xobject
* as alternates
*/
public PBImageXObjectFeaturesObjectAdapter(PDImageXObjectProxy imageXObject, String id, String colorSpaceChild,
String maskChild, String sMaskChild, Set alternatesChild) {
this.imageXObject = imageXObject;
this.id = id;
this.colorSpaceChild = colorSpaceChild;
this.maskChild = maskChild;
this.sMaskChild = sMaskChild;
this.alternatesChild = alternatesChild;
this.errors = new ArrayList<>();
this.filterNames = new ArrayList<>();
init();
}
private void init() {
try {
List filters = imageXObject.getStream().getFilters();
if(filters != null) {
for (COSName filter : filters) {
this.filterNames.add(filter.getName());
}
}
} catch (IOException e) {
this.errors.add("Can't get image stream filters");
LOGGER.info(e);
}
}
@Override
public String getID() {
return this.id;
}
@Override
public Long getWidth() {
return imageXObject == null ? null : Long.valueOf(imageXObject.getWidth());
}
@Override
public Long getHeight() {
return imageXObject == null ? null : Long.valueOf(imageXObject.getHeight());
}
@Override
public String getColorSpaceChild() {
return this.colorSpaceChild;
}
@Override
public Long getBitsPerComponent() {
return imageXObject == null ? null : Long.valueOf(imageXObject.getBitsPerComponent());
}
@Override
public boolean getImageMask() {
return imageXObject == null ? false : imageXObject.isStencil();
}
@Override
public String getMaskChild() {
return this.maskChild;
}
@Override
public boolean isInterpolate() {
return imageXObject == null ? false : imageXObject.getInterpolate();
}
@Override
public Set getAlternatesChild() {
return Collections.unmodifiableSet(this.alternatesChild);
}
@Override
public String getSMaskChild() {
return this.sMaskChild;
}
@Override
public Long getStructParent() {
return imageXObject == null ? null : Long.valueOf(imageXObject.getStructParent());
}
@Override
public List getFilters() {
return Collections.unmodifiableList(filterNames);
}
@Override
public InputStream getMetadata() {
if (imageXObject != null) {
return PBAdapterHelper.getMetadataStream(imageXObject.getMetadata());
}
return null;
}
@Override
public InputStream getRawStreamData() {
if (imageXObject != null) {
try {
if (imageXObject.getStream() != null && imageXObject.getStream().getStream() != null) {
return imageXObject.getStream().getStream().getFilteredStream();
}
} catch (IOException e) {
LOGGER.info(e);
}
}
return null;
}
@Override
public boolean isPDFObjectPresent() {
return this.imageXObject != null;
}
@Override
public List getErrors() {
return Collections.emptyList();
}
@Override
public List getFilterAdapters() {
if (imageXObject != null && imageXObject.getCOSObject() != null) {
COSBase base = imageXObject.getCOSStream().getDictionaryObject(COSName.DECODE_PARMS);
List res = new ArrayList<>();
if (base instanceof COSDictionary) {
res.add(new PBStreamFilterAdapter(base));
} else if (base instanceof COSArray) {
for (COSBase baseElem : (COSArray) base) {
if (baseElem instanceof COSDictionary) {
res.add(new PBStreamFilterAdapter(baseElem));
} else {
res.add(null);
}
}
}
return Collections.unmodifiableList(res);
}
return Collections.emptyList();
}
class PBStreamFilterAdapter implements StreamFilterAdapter {
private COSDictionary base;
public PBStreamFilterAdapter(COSBase base) {
this.base = base == null ? new COSDictionary() : (COSDictionary) base;
}
@Override
public Long getCCITTK() {
COSBase k = base.getDictionaryObject(COSName.K);
return k instanceof COSInteger ? ((COSInteger) k).longValue() : null;
}
@Override
public boolean getCCITTEndOfLine() {
COSBase colors = base.getDictionaryObject(COSName.COLORS);
return colors instanceof COSBoolean ? ((COSBoolean) colors).getValue() : false;
}
@Override
public boolean getCCITTEncodedByteAlign() {
COSBase bitsPerComponent = base.getDictionaryObject(COSName.BITS_PER_COMPONENT);
return bitsPerComponent instanceof COSBoolean ? ((COSBoolean) bitsPerComponent).getValue() :
false;
}
@Override
public Long getCCITTColumns() {
COSBase columns = base.getDictionaryObject(COSName.COLUMNS);
return columns instanceof COSInteger ? ((COSInteger) columns).longValue() : null;
}
@Override
public Long getCCITTRows() {
COSBase rows = base.getDictionaryObject(COSName.ROWS);
return rows instanceof COSInteger ? ((COSInteger) rows).longValue() : null;
}
@Override
public boolean getCCITTEndOfBlock() {
COSBase endOfBlock = base.getDictionaryObject(COSName.getPDFName("EndOfBlock"));
return endOfBlock instanceof COSBoolean ? ((COSBoolean) endOfBlock).getValue() : true;
}
@Override
public boolean getCCITTBlackIs1() {
COSBase blackIs1 = base.getDictionaryObject(COSName.BLACK_IS_1);
return blackIs1 instanceof COSBoolean ? ((COSBoolean) blackIs1).getValue() : false;
}
@Override
public Long getCCITTDamagedRowsBeforeError() {
COSBase damgedRowsBeforeError =
base.getDictionaryObject(COSName.getPDFName("DamagedRowsBeforeError"));
return damgedRowsBeforeError instanceof COSInteger ? ((COSInteger) damgedRowsBeforeError).longValue() :
null;
}
@Override
public Long getDCTColorTransform() {
COSBase colorTransform = base.getDictionaryObject(COSName.getPDFName("ColorTransform"));
return colorTransform instanceof COSInteger ? ((COSInteger) colorTransform).longValue() : null;
}
@Override
public Long getLZWEarlyChange() {
COSBase earlyChange = base.getDictionaryObject(COSName.EARLY_CHANGE);
return earlyChange instanceof COSInteger ? ((COSInteger) earlyChange).longValue() : null;
}
@Override
public Long getFlatePredictor() {
COSBase predictor = base.getDictionaryObject(COSName.PREDICTOR);
return predictor instanceof COSInteger ? ((COSInteger) predictor).longValue() : null;
}
@Override
public Long getFlateColors() {
COSBase colors = base.getDictionaryObject(COSName.COLORS);
return colors instanceof COSInteger ? ((COSInteger) colors).longValue() : null;
}
@Override
public Long getFlateBitsPerComponent() {
COSBase bitsPerComponent = base.getDictionaryObject(COSName.BITS_PER_COMPONENT);
return bitsPerComponent instanceof COSInteger ? ((COSInteger) bitsPerComponent).longValue() : null;
}
@Override
public Long getFlateColumns() {
return ((COSInteger) base.getDictionaryObject(COSName.COLUMNS)).longValue();
}
@Override
public InputStream getJBIG2Global() {
try {
if (base.getDictionaryObject(COSName.JBIG2_GLOBALS) instanceof COSStream) {
return ((COSStream) base.getDictionaryObject(COSName.JBIG2_GLOBALS)).getUnfilteredStream();
}
} catch (IOException e) {
LOGGER.info(e);
}
return null;
}
@Override
public boolean hasCryptFilter() {
return !COSName.IDENTITY.equals(base.getCOSName(COSName.NAME));
}
}
}