/*
    * 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.rat;
  
  import java.io.File;
  import java.io.FileFilter;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.PrintWriter;
  import java.net.MalformedURLException;
  import java.net.URI;
  import java.net.URL;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Objects;
  import java.util.SortedSet;
  import java.util.function.Consumer;
  
  import org.apache.commons.io.function.IOSupplier;
  import org.apache.commons.io.output.CloseShieldOutputStream;
  import org.apache.rat.analysis.IHeaderMatcher;
  import org.apache.rat.commandline.StyleSheets;
  import org.apache.rat.config.AddLicenseHeaders;
  import org.apache.rat.config.exclusion.ExclusionProcessor;
  import org.apache.rat.config.exclusion.StandardCollection;
  import org.apache.rat.config.results.ClaimValidator;
  import org.apache.rat.configuration.builders.AnyBuilder;
  import org.apache.rat.document.DocumentName;
  import org.apache.rat.document.DocumentNameMatcher;
  import org.apache.rat.document.FileDocument;
  import org.apache.rat.license.ILicense;
  import org.apache.rat.license.ILicenseFamily;
  import org.apache.rat.license.LicenseSetFactory;
  import org.apache.rat.license.LicenseSetFactory.LicenseFilter;
  import org.apache.rat.report.IReportable;
  import org.apache.rat.utils.DefaultLog;
  import org.apache.rat.utils.Log.Level;
  import org.apache.rat.utils.ReportingSet;
  import org.apache.rat.walker.FileListWalker;
  import org.apache.rat.walker.IReportableListWalker;
  
  /**
   * A configuration object is used by the front end to invoke the
   * {@link Reporter}. The sole purpose of the frontends is to create the
   * configuration and invoke the {@link Reporter}.
   */
  public class ReportConfiguration {
  
      /**
       * The styles of processing for various categories of documents.
       */
      public enum Processing {
          /** List file as present only */
          NOTIFICATION("List file as present"),
          /** List all present licenses */
          PRESENCE("List any licenses found"),
          /** List all present licenses and unknown licenses */
          ABSENCE("List licenses found and any unknown licences");
  
          /**
           * Description of the processing
           */
          private final String description;
  
  
          Processing(final String description) {
              this.description = description;
          }
  
          /**
           * Gets the description of the processing type.
           * @return the description of the processing type.
           */
          public String desc() {
              return description;
          }
      }
 
     /** The LicenseSetFactory for the configuration */
     private final LicenseSetFactory licenseSetFactory;
 
     /**
      * {@code true} if we are adding license headers to the files.
      */
     private boolean addingLicenses;
     /**
      * {@code true} if we are adding license headers in place (no *.new files)
      */
     private boolean addingLicensesForced;
     /**
      * The copyright message to add if we are adding headers. Will be null if we are not
      * adding copyright messages.
      */
     private String copyrightMessage;
     /**
      * The IOSupplier that provides the output stream to write the report to.
      */
     private IOSupplier<OutputStream> out;
     /**
      * The IOSupplier that provides the stylesheet to style the XML output.
      */
     private IOSupplier<InputStream> styleSheet;
 
     /**
      * A list of files to read file names from.
      */
     private final List<File> sources;
 
     /**
      * A list of reportables to process;
      */
     private final List<IReportable> reportables;
 
     /**
      * A predicate to test if a path should be included in the processing.
      */
     private final ExclusionProcessor exclusionProcessor;
 
     /**
      * The default filter for displaying families.
      */
     private LicenseFilter listFamilies;
     /**
      * The default filter for displaying licenses.
      */
     private LicenseFilter listLicenses;
     /**
      * {@code true} if this is a dry run and no processing is to take place.
      */
     private boolean dryRun;
     /**
      * How to process ARCHIVE document types.
      */
     private Processing archiveProcessing;
     /**
      * How to process STANDARD document types.
      */
     private Processing standardProcessing;
     /**
      * The ClaimValidator to validate min/max counts and similar claims.
      */
     private final ClaimValidator claimValidator;
     /**
      * Constructor
      */
     public ReportConfiguration() {
         licenseSetFactory = new LicenseSetFactory();
         listFamilies = Defaults.LIST_FAMILIES;
         listLicenses = Defaults.LIST_LICENSES;
         dryRun = false;
         exclusionProcessor = new ExclusionProcessor();
         claimValidator = new ClaimValidator();
         sources = new ArrayList<>();
         reportables = new ArrayList<>();
     }
 
     /**
      * Report the excluded files to the appendable object.
      * @param appendable the appendable object to write to.
      */
     public void reportExclusions(final Appendable appendable) {
         try {
             exclusionProcessor.reportExclusions(appendable);
         } catch (IOException e) {
             DefaultLog.getInstance().warn("Unable to report exclusions", e);
         }
     }
 
     /**
      * Adds a file as a source of files to scan.
      * The file must be a text file that lists files to be included.
      * File within the file must be in linux format with a
      * "/" file separator.
      * @param file the file to process.
      */
     public void addSource(final File file) {
         notNull(file, "File may not be null.");
         sources.add(file);
     }
 
     private void notNull(final Object o, final String msg) {
         if (o == null) {
             throw new ConfigurationException(msg);
         }
     }
 
     /**
      * Adds a Reportable as a source of files to scan.
      * @param reportable the reportable to process.
      */
     public void addSource(final IReportable reportable) {
         notNull(reportable, "Reportable may not be null.");
         reportables.add(reportable);
     }
 
     /**
      * Returns {@code true} if the configuration has any sources defined.
      * @return {@code true} if the configuration has any sources defined.
      */
     public boolean hasSource() {
         return !reportables.isEmpty() || !sources.isEmpty();
     }
 
     /**
      * Gets a builder initialized with any files specified as sources.
      * @return a configured builder.
      */
     public IReportableListWalker.Builder getSources() {
         DocumentName name = DocumentName.builder(new File(".")).build();
         IReportableListWalker.Builder builder = IReportableListWalker.builder(name);
         sources.forEach(file -> builder.addReportable(new FileListWalker(new FileDocument(file, DocumentNameMatcher.MATCHES_ALL))));
         reportables.forEach(builder::addReportable);
         return builder;
     }
 
     /**
      * Gets the matcher that matches generated text.
      * @return the matcher that matches generated text.
      */
     public IHeaderMatcher getGeneratedMatcher() {
         return new AnyBuilder().setResource("/org/apache/rat/generation-keywords.txt").build();
     }
 
     /**
      * Retrieves the archive processing type.
      * @return The archive processing type.
      */
     public Processing getArchiveProcessing() {
         return archiveProcessing == null ? Defaults.ARCHIVE_PROCESSING : archiveProcessing;
     }
 
     /**
      * Sets the archive processing type. If not set will default to NOTIFICATION.
      * @param archiveProcessing the type of processing archives should have.
      */
     public void setArchiveProcessing(final Processing archiveProcessing) {
         this.archiveProcessing = archiveProcessing;
     }
 
     /**
      * Retrieves the archive processing type.
      * @return The archive processing type.
      */
     public Processing getStandardProcessing() {
         return standardProcessing == null ? Defaults.STANDARD_PROCESSING : standardProcessing;
     }
 
     /**
      * Sets the archive processing type. If not set will default to NOTIFICATION.
      * @param standardProcessing the type of processing archives should have.
      */
     public void setStandardProcessing(final Processing standardProcessing) {
         this.standardProcessing = standardProcessing;
     }
 
     /**
      * Set the log level for reporting collisions in the set of license families.
      * <p>NOTE: should be set before licenses or license families are added.</p>
      * @param level The log level to use.
      */
     public void logFamilyCollisions(final Level level) {
         licenseSetFactory.logFamilyCollisions(level);
     }
 
     /**
      * Sets the reporting option for duplicate license families.
      * @param state The ReportingSet.Option to use for reporting.
      */
     public void familyDuplicateOption(final ReportingSet.Options state) {
         licenseSetFactory.familyDuplicateOption(state);
     }
 
     /**
      * Sets the log level for reporting license collisions.
      * @param level The log level.
      */
     public void logLicenseCollisions(final Level level) {
         licenseSetFactory.logLicenseCollisions(level);
     }
 
     /**
      * Sets the reporting option for duplicate licenses.
      * @param state the ReportingSt.Option to use for reporting.
      */
     public void licenseDuplicateOption(final ReportingSet.Options state) {
         licenseSetFactory.licenseDuplicateOption(state);
     }
 
     /**
      * Set the level of license families that should be output in the XML document.
      * @param filter the license families to list.
      */
     public void listFamilies(final LicenseFilter filter) {
         listFamilies = filter;
     }
 
     /**
      * Return the current filter that determines which families will be output in the XML document.
      * @return the filter that defines the families to list.
      */
     public LicenseFilter listFamilies() {
         return listFamilies;
     }
 
     /**
      * Set the level of licenses that should be output in the XML document.
      * @param filter the licenses to list.
      */
     public void listLicenses(final LicenseFilter filter) {
         listLicenses = filter;
     }
 
     /**
      * Gets the selected license filter.
      * @return the filter to limit license display.
      */
     public LicenseFilter listLicenses() {
         return listLicenses;
     }
 
     /**
      * Sets the dry run flag.
      * @param state the state for the dry run flag.
      */
     public void setDryRun(final boolean state) {
         dryRun = state;
     }
 
     /**
      * Returns the state of the dry run flag.
      * @return the state of the dry run flag.
      */
     public boolean isDryRun() {
         return dryRun;
     }
 
     /**
      * Excludes a StandardCollection of patterns.
      * @param collection the StandardCollection to exclude.
      * @see ExclusionProcessor#addExcludedCollection(StandardCollection)
      */
     public void addExcludedCollection(final StandardCollection collection) {
         exclusionProcessor.addExcludedCollection(collection);
     }
 
     /**
      * Excludes the file processor defined in the StandardCollection.
      * @param collection the StandardCollection to exclude.
      * @see ExclusionProcessor#addFileProcessor(StandardCollection)
      */
     public void addExcludedFileProcessor(final StandardCollection collection) {
         exclusionProcessor.addFileProcessor(collection);
     }
 
     /**
      * Excludes files that match a FileFilter.
      * @param fileFilter the file filter to match.
      */
     public void addExcludedFilter(final FileFilter fileFilter) {
         exclusionProcessor.addExcludedMatcher(new DocumentNameMatcher(fileFilter));
     }
 
     /**
      * Excludes files that match a DocumentNameMatcher.
      * @param matcher the DocumentNameMatcher to match.
      */
     public void addExcludedMatcher(final DocumentNameMatcher matcher) {
         exclusionProcessor.addExcludedMatcher(matcher);
     }
 
     /**
      * Excludes files that match the pattern.
      *
      * @param patterns the collection of patterns to exclude.
      * @see ExclusionProcessor#addIncludedPatterns(Iterable)
      */
     public void addExcludedPatterns(final Iterable<String> patterns) {
         exclusionProcessor.addExcludedPatterns(patterns);
     }
 
     /**
      * Adds the patterns from the standard collection as included patterns.
      * @param collection the standard collection to include.
      */
     public void addIncludedCollection(final StandardCollection collection) {
         exclusionProcessor.addIncludedCollection(collection);
     }
 
     /**
      * Adds the fileFilter to filter files that should be included, this overrides any
      * exclusion of the same files.
      * @param fileFilter the filter to identify files that should be included.
      */
     public void addIncludedFilter(final FileFilter fileFilter) {
         exclusionProcessor.addIncludedMatcher(new DocumentNameMatcher(fileFilter));
     }
 
     /**
      * Add file patterns that are to be included. These patterns override any exclusion of
      * the same files.
      * @param patterns The iterable of Strings containing the patterns.
      */
     public void addIncludedPatterns(final Iterable<String> patterns) {
         exclusionProcessor.addIncludedPatterns(patterns);
     }
 
     /**
      * Get the DocumentNameMatcher that excludes files found in the directory tree..
      * @param baseDir the DocumentName for the base directory.
      * @return the DocumentNameMatcher for the base directory.
      */
     public DocumentNameMatcher getDocumentExcluder(final DocumentName baseDir) {
         return exclusionProcessor.getNameMatcher(baseDir);
     }
 
     /**
      * Gets the IOSupplier with the style sheet.
      * @return the Supplier of the InputStream that is the XSLT style sheet to style
      * the report with.
      */
     public IOSupplier<InputStream> getStyleSheet() {
         return styleSheet;
     }
 
     /**
      * Sets the style sheet for custom processing. The IOSupplier may be called
      * multiple times, so the input stream must be able to be opened and closed
      * multiple times.
      * @param styleSheet the XSLT style sheet to style the report with.
      */
     public void setStyleSheet(final IOSupplier<InputStream> styleSheet) {
         this.styleSheet = styleSheet;
     }
 
     /**
      * Adds the licenses and approved licenses from the defaults object to the
      * configuration. <em>Side effect:</em> if the report should be styled and no
      * style sheet has been set the plain stylesheet from the defaults will be used.
      * @param defaults The defaults to set.
      */
     public void setFrom(final Defaults defaults) {
         licenseSetFactory.add(defaults.getLicenseSetFactory());
         if (getStyleSheet() == null) {
             setStyleSheet(StyleSheets.PLAIN.getStyleSheet());
         }
         defaults.getStandardExclusion().forEach(this::addExcludedCollection);
     }
 
     /**
      * Sets the style sheet.
      * @param styleSheet the XSLT style sheet file to style the report with.
      */
     public void setStyleSheet(final File styleSheet) {
         Objects.requireNonNull(styleSheet, "styleSheet file should not be null");
         setStyleSheet(styleSheet.toURI());
     }
 
     /**
      * Sets the style sheet for custom processing. The stylesheet may be opened
      * multiple times so the URI must be capable of being opened multiple times.
      * @param styleSheet the URI of the XSLT style sheet to style the report with.
      */
     public void setStyleSheet(final URI styleSheet) {
         Objects.requireNonNull(styleSheet, "Stylesheet file must not be null");
         try {
             setStyleSheet(styleSheet.toURL());
         } catch (MalformedURLException e) {
             throw new ConfigurationException("Unable to process stylesheet", e);
         }
     }
 
     /**
      * Sets the style sheet for custom processing. The stylesheet may be opened
      * multiple times so the URL must be capable of being opened multiple times.
      * @param styleSheet the URL of the XSLT style sheet to style the report with.
      */
     public void setStyleSheet(final URL styleSheet) {
         Objects.requireNonNull(styleSheet, "Stylesheet file must not be null");
         setStyleSheet(styleSheet::openStream);
     }
 
     /**
      * Sets the supplier for the output stream. The supplier may be called multiple
      * times to provide the stream. Suppliers should prepare streams that are
      * appended to and that can be closed. If an {@code OutputStream} should not be
      * closed consider wrapping it in a {@code CloseShieldOutputStream}
      * @param out The OutputStream supplier that provides the output stream to write
      * the report to. A null value will use System.out.
      * @see CloseShieldOutputStream
      */
     public void setOut(final IOSupplier<OutputStream> out) {
         this.out = out;
     }
 
     /**
      * Sets the OutputStream supplier to use the specified file. The file may be
      * opened and closed several times. File is deleted first and then may be
      * repeatedly opened in append mode.
      * @see #setOut(IOSupplier)
      * @param file The file to create the supplier with.
      */
     public void setOut(final File file) {
         Objects.requireNonNull(file, "output file should not be null");
         if (file.exists()) {
             try {
                 Files.delete(file.toPath());
             } catch (IOException e) {
                 DefaultLog.getInstance().warn("Unable to delete file: " + file);
             }
         }
         File parent = file.getParentFile();
         if (!parent.mkdirs() && !parent.isDirectory()) {
             DefaultLog.getInstance().warn("Unable to create directory: " + file.getParentFile());
         }
         setOut(() -> new FileOutputStream(file, true));
     }
 
     /**
      * Returns the output stream supplier. If no stream has been set returns a
      * supplier for System.out.
      * @return The supplier of the output stream to write the report to.
      */
     public IOSupplier<OutputStream> getOutput() {
         return out == null ? () -> CloseShieldOutputStream.wrap(System.out) : out;
     }
 
     /**
      * Gets a PrintWriter that wraps the output stream.
      * @return A supplier for a PrintWriter that wraps the output stream.
      * @see #getOutput()
      */
     public IOSupplier<PrintWriter> getWriter() {
         return () -> new PrintWriter(new OutputStreamWriter(getOutput().get(), StandardCharsets.UTF_8));
     }
 
     /**
      * Adds a license to the list of licenses. Does not add the license to the list
      * of approved licenses.
      * @param license The license to add to the list of licenses.
      */
     public void addLicense(final ILicense license) {
         licenseSetFactory.addLicense(license);
     }
 
     /**
      * Adds a license to the list of licenses. Does not add the license to the list
      * of approved licenses.
      * @param builder The license builder to build and add to the list of licenses.
      * @return The ILicense implementation that was added.
      */
     public ILicense addLicense(final ILicense.Builder builder) {
         return licenseSetFactory.addLicense(builder);
     }
 
     /**
      * Adds multiple licenses to the list of licenses. Does not add the licenses to
      * the list of approved licenses.
      * @param licenses The licenses to add.
      */
     public void addLicenses(final Collection<ILicense> licenses) {
         licenseSetFactory.addLicenses(licenses);
     }
 
     /**
      * Adds a license family to the list of families. Does not add the family to the
      * list of approved licenses.
      * @param family The license family to add to the list of license families.
      */
     public void addFamily(final ILicenseFamily family) {
        licenseSetFactory.addFamily(family);
     }
 
     /**
      * Adds a license family to the list of families. Does not add the family to the
      * list of approved licenses.
      * @param builder The licenseFamily.Builder to build and add to the list of
      * licenses.
      */
     public void addFamily(final ILicenseFamily.Builder builder) {
         licenseSetFactory.addFamily(builder);
     }
 
     /**
      * Adds multiple families to the list of license families. Does not add the
      * licenses to the list of approved licenses.
      * @param families The license families to add.
      */
     public void addFamilies(final Collection<ILicenseFamily> families) {
         families.forEach(this::addApprovedLicenseCategory);
     }
 
     /**
      * Adds an ILicenseFamily to the list of approved licenses.
      * @param approvedILicenseFamily the LicenseFamily to add.
      */
     public void addApprovedLicenseCategory(final ILicenseFamily approvedILicenseFamily) {
         addApprovedLicenseCategory(approvedILicenseFamily.getFamilyCategory());
     }
 
     /**
      * Adds a license family category (id) to the list of approved licenses
      * @param familyCategory the category to add.
      */
     public void addApprovedLicenseCategory(final String familyCategory) {
         licenseSetFactory.approveLicenseCategory(familyCategory);
     }
 
     /**
      * Adds a collection of license family categories to the set of approved license
      * names.
      * @param approvedLicenseCategories set of approved license categories.
      */
     public void addApprovedLicenseCategories(final Collection<String> approvedLicenseCategories) {
         approvedLicenseCategories.forEach(this::addApprovedLicenseCategory);
     }
 
     /**
      * Adds a license family category to the list of approved licenses. <em>Once a
      * license has been removed from the approved list it cannot be re-added</em>
      * @param familyCategory the category to add.
      */
     public void removeApprovedLicenseCategory(final String familyCategory) {
         licenseSetFactory.removeLicenseCategory(ILicenseFamily.makeCategory(familyCategory));
     }
 
     /**
      * Removes a license family category from the list of approved licenses.
      * <em>Once a license has been removed from the approved list it cannot be
      * re-added</em>
      * @param familyCategory the family category to remove.
      */
     public void removeApprovedLicenseCategories(final Collection<String> familyCategory) {
         familyCategory.forEach(this::removeApprovedLicenseCategory);
     }
 
     /**
      * Gets the SortedSet of approved license categories. <em>Once a license has
      * been removed from the approved list it cannot be re-added</em>
      * @param filter The LicenseFilter to filter the categories by.
      * @return the Sorted set of approved license categories.
      */
     public SortedSet<String> getLicenseCategories(final LicenseFilter filter) {
         return licenseSetFactory.getLicenseCategories(filter);
     }
 
     /**
      * Gets the SortedSet of approved license categories. <em>Once a license has
      * been removed from the approved list it cannot be re-added</em>
      * @param filter The LicenseFilter to filter the licenses by.
      * @return the Sorted set of approved license categories.
      */
     public SortedSet<ILicense> getLicenses(final LicenseFilter filter) {
         return licenseSetFactory.getLicenses(filter);
     }
 
     /**
      * Gets the SortedSet of approved license categories. <em>Once a license has
      * been removed from the approved list it cannot be re-added</em>
      * @param filter The LicenseFilter to filter the licenses by.
      * @return the Sorted set of approved license categories.
      */
     public SortedSet<String> getLicenseIds(final LicenseFilter filter) {
         return licenseSetFactory.getLicenseIds(filter);
     }
 
     /**
      * Adds an ILicenseFamily to the list of approved licenses.
      * @param approvedLicense the License to add.
      */
     public void addApprovedLicenseId(final ILicense approvedLicense) {
         addApprovedLicenseId(approvedLicense.getId());
     }
 
     /**
      * Adds a license family category (id) to the list of approved licenses
      * @param licenseId the license id to add.
      */
     public void addApprovedLicenseId(final String licenseId) {
         licenseSetFactory.approveLicenseId(licenseId);
     }
 
     /**
      * Adds a collection of license family categories to the set of approved license
      * names.
      * @param approvedLicenseIds set of approved license IDs.
      */
     public void addApprovedLicenseIds(final Collection<String> approvedLicenseIds) {
         approvedLicenseIds.forEach(this::addApprovedLicenseId);
     }
 
     /**
      * Adds a license family category to the list of approved licenses. <em>Once a
      * license has been removed from the approved list it cannot be re-added</em>
      * @param licenseId the license ID to add.
      */
     public void removeApprovedLicenseId(final String licenseId) {
         licenseSetFactory.removeLicenseId(licenseId);
     }
 
     /**
      * Removes a license family category from the list of approved licenses.
      * <em>Once a license has been removed from the approved list it cannot be
      * re-added</em>
      * @param licenseIds the license IDs to remove.
      */
     public void removeApprovedLicenseIds(final Collection<String> licenseIds) {
         licenseIds.forEach(this::removeApprovedLicenseId);
     }
 
     /**
      * Returns the optional license copyright being added if RAT is adding headers.
      * This value is ignored, if no license headers are added.
      * @return the optional copyright message.
      * @see #isAddingLicenses()
      */
     public String getCopyrightMessage() {
         return copyrightMessage;
     }
 
     /**
      * Sets the optional copyright message used if RAT is adding license headers.
      * This value is ignored, if no license headers are added.
      * @param copyrightMessage message to set.
      * @see #isAddingLicenses()
      */
     public void setCopyrightMessage(final String copyrightMessage) {
         this.copyrightMessage = copyrightMessage;
     }
 
     /**
      * Gets the flag that determines if license headers are "forced" overwriting existing files.
      * This value is ignored if RAT is not adding licenses.
      * @return {@code true} if RAT is forcing the adding license headers.
      * @see #isAddingLicenses()
      */
     public boolean isAddingLicensesForced() {
         return addingLicensesForced;
     }
 
     /**
      * Gets the flag that determines if license headers should be added if missing.
      * @return whether RAT should add missing license headers.
      * @see #isAddingLicensesForced()
      * @see #getCopyrightMessage()
      */
     public boolean isAddingLicenses() {
         return addingLicenses;
     }
 
     /**
      * Sets whether RAT should enable, disable, or force the adding of license
      * headers.
      * @param addLicenseHeaders enables/disables or forces adding of licenses
      * headers.
      * @see #isAddingLicenses()
      * @see #setCopyrightMessage(String)
      */
     public void setAddLicenseHeaders(final AddLicenseHeaders addLicenseHeaders) {
         addingLicenses = false;
         addingLicensesForced = false;
         switch (addLicenseHeaders) {
         case FALSE:
             // do nothing
             break;
         case FORCED:
             addingLicensesForced = true;
             addingLicenses = true;
             break;
         case TRUE:
             addingLicenses = true;
             break;
         }
     }
 
     /**
      * Gets a sorted set of ILicenseFamily objects based on {@code filter}. if
      * filter is set:
      * <ul>
      * <li>{@code all} - All licenses families will be returned.</li>
      * <li>{@code approved} - Only approved license families will be returned</li>
      * <li>{@code none} - No license families will be returned</li>
      * </ul>
      * @param filter The license filter.
      * @return The set of defined licenses.
      */
     public SortedSet<ILicenseFamily> getLicenseFamilies(final LicenseFilter filter) {
         return licenseSetFactory.getLicenseFamilies(filter);
     }
 
     /**
      * Gets the ClaimValidator for the configuration.
      * @return the ClaimValidator.
      */
     public ClaimValidator getClaimValidator() {
         return claimValidator;
     }
 
     /**
      * Gets the enclosed LicenseSetFactory.
      * @return the license set factory.
      */
     public LicenseSetFactory getLicenseSetFactory() {
         return licenseSetFactory;
     }
 
     /**
      * Validates that the configuration is valid.
      * @param logger String consumer to log warning messages to.
      * @throws ConfigurationException on configuration error.
      */
     public void validate(final Consumer<String> logger) {
         if (!hasSource()) {
             String msg = "At least one source must be specified";
             logger.accept(msg);
             throw new ConfigurationException(msg);
         }
         if (licenseSetFactory.getLicenses(LicenseFilter.ALL).isEmpty()) {
             String msg = "You must specify at least one license";
             logger.accept(msg);
             throw new ConfigurationException(msg);
         }
     }
 }