103 lines
3.2 KiB
Java
103 lines
3.2 KiB
Java
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package eu.dnetlib.dhp.schema.oaf.utils;
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import java.io.Serializable;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.regex.Pattern;
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import org.apache.commons.lang.StringUtils;
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import eu.dnetlib.dhp.schema.oaf.CleaningFunctions;
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import eu.dnetlib.dhp.schema.oaf.OafEntity;
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import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
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import eu.dnetlib.dhp.utils.DHPUtils;
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/**
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* Factory class for OpenAIRE identifiers in the Graph
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*/
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public class IdentifierFactory implements Serializable {
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public static final String ID_SEPARATOR = "::";
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public static final String ID_PREFIX_SEPARATOR = "|";
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public final static String ID_REGEX = "^[0-9][0-9]\\" + ID_PREFIX_SEPARATOR + ".{12}" + ID_SEPARATOR
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+ "[a-zA-Z0-9]{32}$";
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public final static String DOI_REGEX = "(^10\\.[0-9]{4,9}\\/[-._;()\\/:a-zA-Z0-9]+$)|" +
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"(^10\\.1002\\/[^\\s]+$)|" +
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"(^10\\.1021\\/[a-zA-Z0-9_][a-zA-Z0-9_][0-9]++$)|" +
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"(^10\\.1207\\/[a-zA-Z0-9_]+\\&[0-9]+_[0-9]+$)";
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public static final int ID_PREFIX_LEN = 12;
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public static final String NONE = "none";
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/**
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* Creates an identifier from the most relevant PID (if available) in the given entity T. Returns entity.id
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* when no PID is available
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* @param entity the entity providing PIDs and a default ID.
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* @param <T> the specific entity type. Currently Organization and Result subclasses are supported.
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* @return an identifier from the most relevant PID, entity.id otherwise
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*/
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public static <T extends OafEntity> String createIdentifier(T entity) {
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if (Objects.isNull(entity.getPid()) || entity.getPid().isEmpty()) {
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return entity.getId();
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}
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return entity
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.getPid()
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.stream()
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.filter(s -> pidFilter(s))
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.min(new PidComparator<>(entity))
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.map(s -> idFromPid(entity, s))
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.map(IdentifierFactory::verifyIdSyntax)
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.orElseGet(entity::getId);
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}
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protected static boolean pidFilter(StructuredProperty s) {
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if (Objects.isNull(s.getQualifier()) ||
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StringUtils.isBlank(StringUtils.trim(s.getValue()))) {
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return false;
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}
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try {
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switch (PidType.valueOf(s.getQualifier().getClassid())) {
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case doi:
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final String doi = StringUtils.trim(StringUtils.lowerCase(s.getValue()));
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return doi.matches(DOI_REGEX);
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default:
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return true;
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}
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} catch (IllegalArgumentException e) {
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return false;
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}
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}
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private static String verifyIdSyntax(String s) {
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if (StringUtils.isBlank(s) || !s.matches(ID_REGEX)) {
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throw new RuntimeException(String.format("malformed id: '%s'", s));
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} else {
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return s;
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}
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}
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private static <T extends OafEntity> String idFromPid(T entity, StructuredProperty s) {
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return new StringBuilder()
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.append(StringUtils.substringBefore(entity.getId(), ID_PREFIX_SEPARATOR))
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.append(ID_PREFIX_SEPARATOR)
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.append(createPrefix(s.getQualifier().getClassid()))
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.append(ID_SEPARATOR)
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.append(DHPUtils.md5(CleaningFunctions.normalizePidValue(s).getValue()))
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.toString();
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}
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// create the prefix (length = 12)
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private static String createPrefix(String pidType) {
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StringBuilder prefix = new StringBuilder(StringUtils.left(pidType, ID_PREFIX_LEN));
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while (prefix.length() < ID_PREFIX_LEN) {
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prefix.append("_");
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}
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return prefix.substring(0, ID_PREFIX_LEN);
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}
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}
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