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* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.padaf.preflight.helpers;
import java.util.ArrayList;
import java.util.List;
import org.apache.padaf.preflight.DocumentHandler;
import org.apache.padaf.preflight.ValidationException;
import org.apache.padaf.preflight.ValidatorConfig;
import org.apache.padaf.preflight.ValidationResult.ValidationError;
import org.apache.padaf.preflight.graphics.ShadingPattern;
import org.apache.padaf.preflight.graphics.TilingPattern;
import org.apache.padaf.preflight.graphics.XObjFormValidator;
import org.apache.padaf.preflight.graphics.XObjImageValidator;
import org.apache.padaf.preflight.graphics.XObjPostscriptValidator;
import org.apache.padaf.preflight.graphics.XObjectValidator;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSDocument;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSObject;
import org.apache.pdfbox.cos.COSStream;
import org.apache.pdfbox.pdmodel.PDDocument;
/**
* @author eric
*
*/
public class GraphicsValidationHelper extends AbstractValidationHelper {
public GraphicsValidationHelper(ValidatorConfig cfg)
throws ValidationException {
super(cfg);
}
/*
* (non-Javadoc)
*
* @see
* net.awl.edoc.pdfa.validation.helpers.AbstractValidationHelper#innerValidate
* (net.awl.edoc.pdfa.validation.DocumentHandler)
*/
@Override
public List<ValidationError> innerValidate(DocumentHandler handler)
throws ValidationException {
List<ValidationError> result = new ArrayList<ValidationError>(0);
PDDocument pdfDoc = handler.getDocument();
// ---- Checks all XObjects
COSDocument cDoc = pdfDoc.getDocument();
List<?> lCOSObj = cDoc.getObjects();
for (Object o : lCOSObj) {
COSObject cObj = (COSObject) o;
COSBase cBase = cObj.getObject();
if (cBase instanceof COSDictionary) {
COSDictionary dic = (COSDictionary) cBase;
String type = dic.getNameAsString(COSName
.getPDFName(DICTIONARY_KEY_TYPE));
if (type != null && DICTIONARY_KEY_XOBJECT.equals(type)) {
result.addAll(validateXObject(handler, cObj));
} else if (type != null && DICTIONARY_KEY_PATTERN.equals(type)) {
result.addAll(validatePattern(handler, cObj));
}
}
}
return result;
}
public List<ValidationError> validatePattern(DocumentHandler handler,
COSObject cObj) throws ValidationException {
COSDictionary cosPattern = (COSDictionary) cObj.getObject();
int ptype = cosPattern.getInt(DICTIONARY_KEY_PATTERN_TYPE);
XObjectValidator validator = null;
switch (ptype) {
case DICTIONARY_PATTERN_TILING:
validator = new TilingPattern(handler, (COSStream) cosPattern);
break;
case DICTIONARY_PATTERN_SHADING:
validator = new ShadingPattern(handler, cosPattern);
break;
default:
throw new ValidationException("Unkown pattern type : " + ptype);
}
return validator.validate();
}
public List<ValidationError> validateXObject(DocumentHandler handler,
COSObject cObj) throws ValidationException {
XObjectValidator xObjVal = null;
// ---- According to the XObject subtype, the validation isn't processed by
// the same Validator
COSStream dic = (COSStream) cObj.getObject();
String subtype = dic.getNameAsString(COSName
.getPDFName(DICTIONARY_KEY_SUBTYPE));
if (XOBJECT_DICTIONARY_VALUE_SUBTYPE_IMG.equals(subtype)) {
xObjVal = new XObjImageValidator(handler, dic);
} else if (XOBJECT_DICTIONARY_VALUE_SUBTYPE_FORM.equals(subtype)) {
xObjVal = new XObjFormValidator(handler, dic);
} else if (XOBJECT_DICTIONARY_VALUE_SUBTYPE_POSTSCRIPT.equals(subtype)) {
xObjVal = new XObjPostscriptValidator(handler, dic);
} else {
throw new ValidationException("Invalid XObject subtype");
}
return xObjVal.validate();
}
}