/***************************************************************************** * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * 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 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * ****************************************************************************/ package org.apache.padaf.preflight.xmp; import java.util.ArrayList; import java.util.List; import org.apache.padaf.preflight.ValidationConstants; import org.apache.padaf.preflight.ValidationException; import org.apache.padaf.preflight.ValidationResult.ValidationError; import org.apache.padaf.xmpbox.XMPMetadata; import org.apache.padaf.xmpbox.schema.PDFAIdentificationSchema; import org.apache.padaf.xmpbox.schema.XMPBasicSchema; /** * Class which check if PDF/A Identification Schema contains good information * * @author Germain Costenobel * */ public class PDFAIdentificationValidation { /** * Check if PDFAIdentification is valid * * @param document * the PDF Document * @param metadata * the XMP MetaData * @return List of validation errors * @throws ValidationException */ public List<ValidationError> validatePDFAIdentifer(XMPMetadata metadata) throws ValidationException { List<ValidationError> ve = new ArrayList<ValidationError>(); PDFAIdentificationSchema id = metadata.getPDFIdentificationSchema(); if (id == null) { ve.add(new ValidationError(ValidationConstants.ERROR_METADATA_PDFA_ID_MISSING)); return ve; } // According to the PDF/A specification, the prefix must be pdfaid for this schema. if (!id.getPrefix().equals(PDFAIdentificationSchema.IDPREFIX)) { if (metadata.getSchema(PDFAIdentificationSchema.IDPREFIX, XMPBasicSchema.XMPBASICURI) == null) { ve.add(UnexpectedPrefixFoundError(id.getPrefix(), PDFAIdentificationSchema.IDPREFIX, PDFAIdentificationSchema.class.getName())); } else { id = (PDFAIdentificationSchema) metadata.getSchema( PDFAIdentificationSchema.IDPREFIX, PDFAIdentificationSchema.IDURI); } } checkConformanceLevel(ve, id.getConformanceValue()); checkPartNumber(ve, id.getPartValue()); return ve; } /** * Return a validationError formatted when a schema has not the expected * prefix * * @param prefFound * @param prefExpected * @param schema * @return */ protected ValidationError UnexpectedPrefixFoundError(String prefFound, String prefExpected, String schema) { StringBuilder sb = new StringBuilder(80); sb.append(schema).append(" found but prefix used is '").append(prefFound) .append("', prefix '").append(prefExpected).append("' is expected."); return new ValidationError( ValidationConstants.ERROR_METADATA_WRONG_NS_PREFIX, sb.toString()); } protected void checkConformanceLevel(List<ValidationError> ve, String value) { if (!(value.equals("A") || value.equals("B"))) { ve.add(new ValidationError( ValidationConstants.ERROR_METADATA_INVALID_PDFA_CONFORMANCE)); } } protected void checkPartNumber(List<ValidationError> ve, int value) { if (value != 1) { ve.add(new ValidationError( ValidationConstants.ERROR_METADATA_INVALID_PDFA_VERSION_ID)); } } }