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* distributed with this work for additional information
* 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
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing,
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package org.apache.padaf.preflight;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import javax.activation.DataSource;
import org.apache.padaf.preflight.javacc.PDFParser;
import org.apache.padaf.preflight.javacc.ParseException;
import org.apache.padaf.preflight.javacc.extractor.ExtractorTokenManager;
import org.apache.padaf.preflight.javacc.extractor.SimpleCharStream;
import org.apache.padaf.preflight.ValidationResult.ValidationError;
import org.apache.padaf.preflight.helpers.AbstractValidationHelper;
import org.apache.pdfbox.pdmodel.PDDocument;
public class PdfA1bValidator extends AbstractValidator {
public PdfA1bValidator(ValidatorConfig cfg) throws ValidationException {
super(cfg);
}
/*
* (non-Javadoc)
*
* @see
* net.awl.edoc.pdfa.validation.PdfAValidator#validate(javax.activation.DataSource
* )
*/
public synchronized ValidationResult validate(DataSource source)
throws ValidationException {
DocumentHandler handler = createDocumentHandler(source);
try {
ArrayList<ValidationError> allErrors = new ArrayList<ValidationError>();
// syntax (javacc) validation
try {
InputStreamReader reader = new InputStreamReader(
source.getInputStream(),encoding);
PDFParser parser = new PDFParser(reader);
handler.setParser(parser);
parser.PDF();
} catch (IOException e) {
throw new ValidationException("Failed to parse datasource due to : "
+ e.getMessage(), e);
} catch (ParseException e) {
allErrors.addAll(createErrorResult(e).getErrorsList());
}
// if here is reached, validate with helpers
// init PDF Box document
PDDocument document = null;
try {
document = PDDocument.load(handler.getSource().getInputStream());
handler.setDocument(document);
} catch (IOException e) {
throw new ValidationException("PDFBox failed to parse datasource", e);
}
// init PDF Extractor
try {
SimpleCharStream scs = new SimpleCharStream(source.getInputStream());
ExtractorTokenManager extractor = new ExtractorTokenManager(scs);
extractor.parse();
handler.setPdfExtractor(extractor);
} catch (IOException e) {
throw new ValidationException(
"PDF ExtractorTokenMng failed to parse datasource", e);
}
/*
* call all helpers
*/
// Execute priority helpers.
for ( AbstractValidationHelper helper : priorHelpers ) {
runValidation(handler, helper, allErrors);
}
// Execute other helpers.
for ( AbstractValidationHelper helper : standHelpers ) {
runValidation(handler, helper, allErrors);
}
// check result
ValidationResult valRes = null;
if (allErrors.size() == 0) {
valRes = new ValidationResult(true);
} else {
// there are some errors
valRes = new ValidationResult(allErrors);
}
// addition of the some objects to avoid a second file parsing
valRes.setPdf(document);
valRes.setXmpMetaData(handler.getMetadata());
return valRes;
} catch ( ValidationException e ) {
// ---- Close all open resources if an error occurs.
handler.close();
throw e;
}
}
}