Java tutorial
/* * Created on 17/set/2010 * * Copyright 2010 by Andrea Vacondio (andrea.vacondio@gmail.com). * * Licensed 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.sejda.impl.itext.util; import java.util.Collections; import java.util.HashMap; import java.util.Map; import org.sejda.model.pdf.encryption.PdfAccessPermission; import org.sejda.model.pdf.encryption.PdfEncryption; import com.lowagie.text.pdf.PdfWriter; /** * Utility methods related to the encryption functionalities. * * @author Andrea Vacondio * */ public final class EncryptionUtils { private static final Map<PdfAccessPermission, Integer> PERMISSIONS_CACHE; static { Map<PdfAccessPermission, Integer> permissionsCache = new HashMap<PdfAccessPermission, Integer>(); permissionsCache.put(PdfAccessPermission.ANNOTATION, PdfWriter.ALLOW_MODIFY_ANNOTATIONS); permissionsCache.put(PdfAccessPermission.ASSEMBLE, PdfWriter.ALLOW_ASSEMBLY); permissionsCache.put(PdfAccessPermission.COPY_AND_EXTRACT, PdfWriter.ALLOW_COPY); permissionsCache.put(PdfAccessPermission.DEGRADATED_PRINT, PdfWriter.ALLOW_DEGRADED_PRINTING); permissionsCache.put(PdfAccessPermission.EXTRACTION_FOR_DISABLES, PdfWriter.ALLOW_SCREENREADERS); permissionsCache.put(PdfAccessPermission.FILL_FORMS, PdfWriter.ALLOW_FILL_IN); permissionsCache.put(PdfAccessPermission.MODIFY, PdfWriter.ALLOW_MODIFY_CONTENTS); permissionsCache.put(PdfAccessPermission.PRINT, PdfWriter.ALLOW_PRINTING); PERMISSIONS_CACHE = Collections.unmodifiableMap(permissionsCache); } private EncryptionUtils() { // utility } /** * Mapping between Sejda and iText encryption algorithms * * @param encryption * @return the iText encryption constant */ public static int getEncryptionAlgorithm(PdfEncryption encryption) { switch (encryption) { case AES_ENC_128: return PdfWriter.ENCRYPTION_AES_128; case STANDARD_ENC_128: return PdfWriter.STANDARD_ENCRYPTION_128; default: return PdfWriter.STANDARD_ENCRYPTION_40; } } /** * Mapping between Sejda and iText access permission constants * * @param permission * @return the iText access permission constant */ public static Integer getAccessPermission(PdfAccessPermission permission) { return PERMISSIONS_CACHE.get(permission); } }