org.eclipse.rdf4j.model.util.Literals类的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中org.eclipse.rdf4j.model.util.Literals类的一些代码示例，展示了Literals类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Literals类的具体详情如下：
包路径：org.eclipse.rdf4j.model.util.Literals
类名称：Literals

Literals介绍

[英]Various utility methods related to Literal.
[中]与文字相关的各种实用程序方法。

代码示例

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

private StringBuilder appendValue(StringBuilder sb, Literal lit) {
  sb.append('"');
  sb.append(lit.getLabel().replace("\"", "\\\""));
  sb.append('"');
  if (Literals.isLanguageLiteral(lit)) {
    sb.append('@');
    sb.append(lit.getLanguage().get());
  }
  else {
    sb.append("^^<");
    sb.append(lit.getDatatype().stringValue());
    sb.append('>');
  }
  return sb;
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

/**
 * Returns the result of {@link #getBooleanValue(Literal, boolean) getBooleanValue((Literal)value,
 * fallback)} in case the supplied value is a literal, returns the fallback value otherwise.
 */
public static boolean getBooleanValue(Value v, boolean fallback) {
  if (v instanceof Literal) {
    return getBooleanValue((Literal)v, fallback);
  }
  else {
    return fallback;
  }
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

public Literal createLiteral(String label, String language) {
  if (!Literals.isValidLanguageTag(language)) {
    throw new IllegalArgumentException("Not a valid language tag: " + language);
  }
  return delegate.createLiteral(label, language);
}

代码示例来源：origin: apache/incubator-rya

/**
 * Converts a {@link Literal} into a {@link RyaType} representation of the
 * {@code literal}.
 * @param literal the {@link Literal} to convert.
 * @return the {@link RyaType} representation of the {@code literal}.
 */
public static RyaType convertLiteral(final Literal literal) {
  if (literal == null) {
    return null;
  }
  if (literal.getDatatype() != null) {
    if (Literals.isLanguageLiteral(literal)) {
      final String language = literal.getLanguage().get();
      if (Literals.isValidLanguageTag(language)) {
        return new RyaType(literal.getDatatype(), literal.stringValue(), language);
      } else {
        log.warn("Invalid language (" + LogUtils.clean(language) + ") found in Literal. Defaulting to: " + UNDETERMINED_LANGUAGE);
        // Replace invalid language with "und"
        return new RyaType(literal.getDatatype(), literal.stringValue(), UNDETERMINED_LANGUAGE);
      }
    }
    return new RyaType(literal.getDatatype(), literal.stringValue());
  }
  return new RyaType(literal.stringValue());
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

RepositoryInfo repInfo = new RepositoryInfo();
String id = Literals.getLabel(bindingSet.getValue("id"), null);
String description = Literals.getLabel(bindingSet.getValue("title"), null);
boolean readable = Literals.getBooleanValue(bindingSet.getValue("readable"), false);
boolean writable = Literals.getBooleanValue(bindingSet.getValue("writable"), false);

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

/**
 * Creates a typed {@link Literal} out of the supplied object, mapping the runtime type of the object to
 * the appropriate XML Schema type. If no mapping is available, the method throws a
 * {@link LiteralUtilException}. Recognized types are {@link Boolean}, {@link Byte}, {@link Double},
 * {@link Float}, {@link Integer}, {@link Long}, {@link Short}, {@link XMLGregorianCalendar } , and
 * {@link Date}.
 * 
 * @param valueFactory
 * @param object
 *        an object to be converted to a typed literal.
 * @return a typed literal representation of the supplied object.
 * @throws LiteralUtilException
 *         If the literal could not be created.
 * @throws NullPointerException
 *         If the object was null.
 */
public static Literal createLiteralOrFail(ValueFactory valueFactory, Object object)
  throws LiteralUtilException
{
  return createLiteral(valueFactory, object, true);
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

/**
 * Returns the result of {@link #getLabel(Literal, String) getLabel((Literal)v, fallback} in case the
 * supplied value is a literal, returns the fallback value otherwise.
 */
public static String getLabel(Value v, String fallback) {
  return v instanceof Literal ? getLabel((Literal)v, fallback) : fallback;
}

代码示例来源：origin: eclipse/rdf4j

RepositoryInfo repInfo = new RepositoryInfo();
String id = Literals.getLabel(bindingSet.getValue("id"), null);
String description = Literals.getLabel(bindingSet.getValue("title"), null);
boolean readable = Literals.getBooleanValue(bindingSet.getValue("readable"), false);
boolean writable = Literals.getBooleanValue(bindingSet.getValue("writable"), false);

代码示例来源：origin: eclipse/rdf4j

/**
 * Creates a typed {@link Literal} out of the supplied object, mapping the runtime type of the object to
 * the appropriate XML Schema type. If no mapping is available, the method throws a
 * {@link LiteralUtilException}. Recognized types are {@link Boolean}, {@link Byte}, {@link Double},
 * {@link Float}, {@link Integer}, {@link Long}, {@link Short}, {@link XMLGregorianCalendar } , and
 * {@link Date}.
 * 
 * @param valueFactory
 * @param object
 *        an object to be converted to a typed literal.
 * @return a typed literal representation of the supplied object.
 * @throws LiteralUtilException
 *         If the literal could not be created.
 * @throws NullPointerException
 *         If the object was null.
 */
public static Literal createLiteralOrFail(ValueFactory valueFactory, Object object)
  throws LiteralUtilException
{
  return createLiteral(valueFactory, object, true);
}

代码示例来源：origin: eclipse/rdf4j

/**
 * Returns the result of {@link #getLabel(Literal, String) getLabel((Literal)v, fallback} in case the
 * supplied value is a literal, returns the fallback value otherwise.
 */
public static String getLabel(Value v, String fallback) {
  return v instanceof Literal ? getLabel((Literal)v, fallback) : fallback;
}

代码示例来源：origin: eclipse/rdf4j

private StringBuilder appendValue(StringBuilder sb, Literal lit) {
  sb.append('"');
  sb.append(lit.getLabel().replace("\"", "\\\""));
  sb.append('"');
  if (Literals.isLanguageLiteral(lit)) {
    sb.append('@');
    sb.append(lit.getLanguage().get());
  }
  else {
    sb.append("^^<");
    sb.append(lit.getDatatype().stringValue());
    sb.append('>');
  }
  return sb;
}

代码示例来源：origin: eclipse/rdf4j

@Override
public Literal createLiteral(String label, String language) {
  if (!Literals.isValidLanguageTag(language)) {
    throw new IllegalArgumentException("Not a valid language tag: " + language);
  }
  return delegate.createLiteral(label, language);
}

代码示例来源：origin: eclipse/rdf4j

/**
 * Returns the result of {@link #getBooleanValue(Literal, boolean) getBooleanValue((Literal)value,
 * fallback)} in case the supplied value is a literal, returns the fallback value otherwise.
 */
public static boolean getBooleanValue(Value v, boolean fallback) {
  if (v instanceof Literal) {
    return getBooleanValue((Literal)v, fallback);
  }
  else {
    return fallback;
  }
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-client

/**
 * Creates a typed {@link Literal} out of the supplied object, mapping the runtime type of the object to
 * the appropriate XML Schema type. If no mapping is available, the method returns a literal with the
 * string representation of the supplied object as the value, and {@link XMLSchema#STRING} as the
 * datatype. Recognized types are {@link Boolean}, {@link Byte}, {@link Double}, {@link Float},
 * {@link Integer}, {@link Long}, {@link Short}, {@link XMLGregorianCalendar } , and {@link Date}.
 * 
 * @param valueFactory
 * @param object
 *        an object to be converted to a typed literal.
 * @return a typed literal representation of the supplied object.
 * @throws NullPointerException
 *         If the object was null.
 */
public static Literal createLiteral(ValueFactory valueFactory, Object object) {
  try {
    return createLiteral(valueFactory, object, false);
  }
  catch (LiteralUtilException e) {
    // This should not happen by design
    throw new IllegalStateException(e);
  }
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-repository-sparql

private StringBuilder appendValue(StringBuilder sb, Literal lit) {
  sb.append('"');
  sb.append(lit.getLabel().replace("\"", "\\\""));
  sb.append('"');
  if (Literals.isLanguageLiteral(lit)) {
    sb.append('@');
    sb.append(lit.getLanguage().get());
  }
  else {
    sb.append("^^<");
    sb.append(lit.getDatatype().stringValue());
    sb.append('>');
  }
  return sb;
}

代码示例来源：origin: apache/incubator-rya

/**
   * Validates the language based on the data type.
   * <p>
   * This will do one of the following:
   * <ul>
   *   <li>Return the original {@code language} if the {@code dataType} is
   *       {@link RDF#LANGSTRING} and it's of a VALID format.</li>
   *   <li>Returns {@link UNDETERMINED_LANGUAGE} if the {@code dataType} is
   *       {@link RDF#LANGSTRING} and it's of an INVALID format.</li>
   *   <li>Return {@code null} if the dataType is NOT {@link RDF#LANGSTRING}.</li>
   * </ul>
   * @param language the language to validate.
   * @param dataType the {@link IRI} data type to validate against.
   * @return the validated language.
   */
  public static String validateLanguage(final String language, final IRI dataType) {
    String result = null;
    if (RDF.LANGSTRING.equals(dataType)) {
      if (language != null && Literals.isValidLanguageTag(language)) {
        result = language;
      } else {
        result = UNDETERMINED_LANGUAGE;
      }
    }
    return result;
  }
}

代码示例来源：origin: eclipse/rdf4j

@Override
public boolean isWritable() throws RepositoryException {
  if (!isInitialized()) {
    throw new IllegalStateException("HTTPRepository not initialized.");
  }
  boolean isWritable = false;
  try (RDF4JProtocolSession client = createHTTPClient()) {
    final String repositoryURL = client.getRepositoryURL();
    try (TupleQueryResult repositoryList = client.getRepositoryList()) {
      while (repositoryList.hasNext()) {
        final BindingSet bindingSet = repositoryList.next();
        final Value uri = bindingSet.getValue("uri");
        if (uri != null && uri.stringValue().equals(repositoryURL)) {
          isWritable = Literals.getBooleanValue(bindingSet.getValue("writable"), false);
          break;
        }
      }
    }
  }
  catch (QueryEvaluationException e) {
    throw new RepositoryException(e);
  }
  catch (IOException e) {
    throw new RepositoryException(e);
  }
  return isWritable;
}

代码示例来源：origin: eclipse/rdf4j

/**
 * Creates a typed {@link Literal} out of the supplied object, mapping the runtime type of the object to
 * the appropriate XML Schema type. If no mapping is available, the method returns a literal with the
 * string representation of the supplied object as the value, and {@link XMLSchema#STRING} as the
 * datatype. Recognized types are {@link Boolean}, {@link Byte}, {@link Double}, {@link Float},
 * {@link Integer}, {@link Long}, {@link Short}, {@link XMLGregorianCalendar } , and {@link Date}.
 * 
 * @param valueFactory
 * @param object
 *        an object to be converted to a typed literal.
 * @return a typed literal representation of the supplied object.
 * @throws NullPointerException
 *         If the object was null.
 */
public static Literal createLiteral(ValueFactory valueFactory, Object object) {
  try {
    return createLiteral(valueFactory, object, false);
  }
  catch (LiteralUtilException e) {
    // This should not happen by design
    throw new IllegalStateException(e);
  }
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation

/**
 * Checks whether the supplied literal is a "simple literal". A "simple literal" is a literal with no
 * language tag and the datatype {@link XMLSchema#STRING}.
 * 
 * @see <a href="http://www.w3.org/TR/sparql11-query/#simple_literal">SPARQL Simple Literal
 *      Documentation</a>
 */
public static boolean isSimpleLiteral(Literal l) {
  return !Literals.isLanguageLiteral(l) && l.getDatatype().equals(XMLSchema.STRING);
}

代码示例来源：origin: apache/incubator-rya

@Override
public RyaType deserialize(final byte[] bytes) throws RyaTypeResolverException {
  if (!deserializable(bytes)) {
    throw new RyaTypeResolverException("Bytes not deserializable");
  }
  final RyaType rt = newInstance();
  rt.setDataType(getRyaDataType());
  String data = new String(bytes, 0, bytes.length - 2, StandardCharsets.UTF_8);
  if (RDF.LANGSTRING.equals(rt.getDataType())) {
    final int langDelimiterPos = data.lastIndexOf(LiteralLanguageUtils.LANGUAGE_DELIMITER);
    final String parsedData = data.substring(0, langDelimiterPos);
    final String language = data.substring(langDelimiterPos + 1, data.length());
    if (language != null && Literals.isValidLanguageTag(language)) {
      rt.setLanguage(language);
    } else {
      rt.setLanguage(LiteralLanguageUtils.UNDETERMINED_LANGUAGE);
    }
    data = parsedData;
  }
  rt.setData(deserializeData(data));
  return rt;
}

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