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Add support for migrating R and X 'local.fedora.server' urls.
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src/main/java/org/fcrepo/migration/ExternalContentURLMapper.java
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| package org.fcrepo.migration; | ||
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| /** | ||
| * An interface defining a method to replace one URL (represented as a String) with another. | ||
| * In the context of migrating objects from fedora 3 to fedora 4, there may be a need to | ||
| * make programmatic updates to the URLs founds in External or Redirect datastreams. This | ||
| * interface is for that purpose. | ||
| * | ||
| * @author Mike Durbin | ||
| */ | ||
| public interface ExternalContentURLMapper { | ||
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| /** | ||
| * Gets the String containing a URL that should be used instead of the given String | ||
| * for migrated external or redirect datastreams. | ||
| */ | ||
| public String mapURL(String url); | ||
| } |
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src/main/java/org/fcrepo/migration/urlmappers/SelfReferencingURLMapper.java
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| package org.fcrepo.migration.urlmappers; | ||
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| import org.fcrepo.migration.ExternalContentURLMapper; | ||
| import org.fcrepo.migration.MigrationIDMapper; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| /** | ||
| * An ExternalContentURLMapper implementation that updates redirects that point to the | ||
| * fedora repository in which they originated to the destination of that pointed-to resource | ||
| * in the fedora 4 repository to which the content is being migrated. | ||
| * | ||
| * For example, if "http://localhost:8080/fedora/objects/object:1/datastreams/POLICY" was a | ||
| * redirect datastream in fedora 3 that redirected to | ||
| * "http://localhost:8080/fedora/objects/policy:1/datastreams/XACML/content", this class would | ||
| * supply the URL for the content of the migrated XACML datastream on the migrated policy:1 | ||
| * object. | ||
| * | ||
| * @author Mike Durbin | ||
| */ | ||
| public class SelfReferencingURLMapper implements ExternalContentURLMapper { | ||
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| private static final String OLD_DS_CONTENT_URL_PATTERN = "http://{local-fedora-server}/fedora/get/([^/]+)/(.+)"; | ||
| private static final String NEW_DS_CONTENT_URL_PATTERN | ||
| = "http://{local-fedora-server}/fedora/objects/([^/]+)/datastreams/([^/]+)/content"; | ||
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| private List<Pattern> contentPatterns; | ||
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| /** | ||
| * A pattern that is compared after the content patterns, and if it matches, | ||
| * an exception is thrown. This is implemented to allow an error to be thrown | ||
| * if any unmatched URLs that reference the fedora 3 repository are found; a | ||
| * case that generally indicates a configuration error in the migration scenario. | ||
| */ | ||
| private Pattern invalidPattern; | ||
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| private MigrationIDMapper idMapper; | ||
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| /** | ||
| * Basic constructor. | ||
| * @param localFedoraServer the domain and port for the server that hosted the fedora objects in the format | ||
| * "localhost:8080". | ||
| * @param idMapper the MigrationIDMapper used for the current migration scenario | ||
| */ | ||
| public SelfReferencingURLMapper(final String localFedoraServer, final MigrationIDMapper idMapper) { | ||
| this.contentPatterns = new ArrayList<>(); | ||
| this.contentPatterns.add(parsePattern(OLD_DS_CONTENT_URL_PATTERN, localFedoraServer)); | ||
| this.contentPatterns.add(parsePattern(NEW_DS_CONTENT_URL_PATTERN, localFedoraServer)); | ||
| this.idMapper = idMapper; | ||
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| this.invalidPattern = parsePattern("http://{local-fedora-server}/fedora/.*", localFedoraServer); | ||
| } | ||
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| private Pattern parsePattern(final String pattern, final String localFedoraServer) { | ||
| return Pattern.compile(pattern.replace("{local-fedora-server}", localFedoraServer)); | ||
| } | ||
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| @Override | ||
| public String mapURL(final String url) { | ||
| for (Pattern p : contentPatterns) { | ||
| final Matcher m = p.matcher(url); | ||
| if (m.matches()) { | ||
| return idMapper.getBaseURL() + idMapper.mapDatastreamPath(m.group(1), m.group(2)); | ||
| } | ||
| } | ||
| if (invalidPattern.matcher(url).matches()) { | ||
| throw new IllegalArgumentException("Unhandled internal external fedora 3 URL. (" + url + ")"); | ||
| } | ||
| return url; | ||
| } | ||
| } |
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