org.openrdf.model.Model.iterator()方法的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中org.openrdf.model.Model.iterator()方法的一些代码示例，展示了Model.iterator()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。Model.iterator()方法的具体详情如下：
包路径：org.openrdf.model.Model
类名称：Model
方法名：iterator

Model.iterator介绍

暂无

代码示例

代码示例来源：origin: org.openrdf.alibaba/alibaba-model

public boolean hasNext() {
  if (iter == null) {
    iter = models[++idx].iterator();
  }
  while (!iter.hasNext() && idx < models.length - 1) {
    iter = models[++idx].iterator();
  }
  return iter.hasNext();
}

代码示例来源：origin: org.openrdf.sesame/sesame-model

@Deprecated
@Override
public Iterator<Statement> match(Resource subj, IRI pred, Value obj, Resource... contexts) {
  return this.filter(subj, pred, obj, contexts).iterator();
}

代码示例来源：origin: org.openrdf.alibaba/alibaba-model

public Iterator<Statement> iterator() {
  return getDelegate().iterator();
}

代码示例来源：origin: org.openrdf.alibaba/alibaba-model

@Override
  public Iterator<Statement> iterator() {
    return getDelegate().filter(subj, pred, obj, contexts)
        .iterator();
  }
};

代码示例来源：origin: apache/stanbol

@Override
public void removeAllNaturalText(String field, String... languages) throws IllegalArgumentException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  ValueTypeFilter<Literal> vtf = new ValueTypeFilter<Literal>(languages);
  Iterator<Statement> statements = model.filter(
    subject, sesameFactory.createURI(field), null).iterator();
  while(statements.hasNext()){
    Statement statement = statements.next();
    if(vtf.evaluate(statement.getObject())){
      statements.remove();
    }
  }
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
public void removeAllNaturalText(String field, String... languages) throws IllegalArgumentException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  ValueTypeFilter<Literal> vtf = new ValueTypeFilter<Literal>(languages);
  Iterator<Statement> statements = model.filter(
    subject, sesameFactory.createURI(field), null).iterator();
  while(statements.hasNext()){
    Statement statement = statements.next();
    if(vtf.evaluate(statement.getObject())){
      statements.remove();
    }
  }
}

代码示例来源：origin: org.openrdf.sesame/sesame-sail-base

private CloseableIteration<? extends Statement, SailException> union(
    CloseableIteration<? extends Statement, SailException> result, Model included)
{
  if (included.isEmpty()) {
    return result;
  }
  final Iterator<Statement> iter = included.iterator();
  CloseableIteration<Statement, SailException> incl;
  incl = new CloseableIteratorIteration<Statement, SailException>(iter);
  return new UnionIteration<Statement, SailException>(incl, result);
}

代码示例来源：origin: apache/stanbol

@Override
@SuppressWarnings("unchecked")
public Iterator<Reference> getReferences(String field) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.filteredIterator(
      IteratorUtils.transformedIterator(
        model.filter(subject, property, null).iterator(), 
        objectTransFormer), // get the object from the statement
      new ValueTypeFilter<Reference>(Reference.class)), //filter references
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
@SuppressWarnings("unchecked")
public Iterator<Reference> getReferences(String field) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.filteredIterator(
      IteratorUtils.transformedIterator(
        model.filter(subject, property, null).iterator(), 
        objectTransFormer), // get the object from the statement
      new ValueTypeFilter<Reference>(Reference.class)), //filter references
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: net.fortytwo.sesametools/common

/**
 * Fetches a collection of generalized lists based on the given subject and
 * predicate, where lists are allowed to branch from head to tail.
 *
 * @param subject       the subject of a statement pointing to the list
 * @param predicate     the predicate of a statement pointing to the list
 * @param graphToSearch the Model from which the list is to be fetched
 * @param contexts      the Model contexts from which the list is to be fetched
 * @return all matching lists. If no matching lists are found, an empty
 * collection is returned.
 */
public Collection<List<Value>> getListsAtNode(
    final Resource subject, final IRI predicate,
    final Model graphToSearch, final Resource... contexts) {
  OpenRDFUtil.verifyContextNotNull(contexts);
  Collection<List<Value>> results;
  final Iterator<Statement> headStatementMatches = graphToSearch.filter(
      subject, predicate, null, contexts).iterator();
  final Set<Resource> heads = new HashSet<>();
  while (headStatementMatches.hasNext()) {
    final Statement nextHeadStatement = headStatementMatches.next();
    if (nextHeadStatement.getObject() instanceof Resource) {
      heads.add((Resource) nextHeadStatement.getObject());
    }
  }
  results = this.getLists(heads, graphToSearch, contexts);
  return results;
}

代码示例来源：origin: apache/stanbol

@Override
@SuppressWarnings("unchecked")
public <T> Iterator<T> get(String field, final Class<T> type) throws UnsupportedTypeException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  //filter for values that are compatible with the parsed type
  Iterator<?> iterator = IteratorUtils.filteredIterator(
    IteratorUtils.transformedIterator(
      model.filter(subject, property, null).iterator(),
      objectTransFormer), // get the object from the statement
    new ValueTypeFilter<T>(type));
  if(!Value.class.isAssignableFrom(type)){
    //if the requested type is not a Sesame value, we need also to
    //transform results
    iterator = IteratorUtils.transformedIterator(
      iterator, // the already filtered values
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); // need to be transformed
  }
  return (Iterator<T>)iterator; 
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
@SuppressWarnings("unchecked")
public <T> Iterator<T> get(String field, final Class<T> type) throws UnsupportedTypeException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  //filter for values that are compatible with the parsed type
  Iterator<?> iterator = IteratorUtils.filteredIterator(
    IteratorUtils.transformedIterator(
      model.filter(subject, property, null).iterator(),
      objectTransFormer), // get the object from the statement
    new ValueTypeFilter<T>(type));
  if(!Value.class.isAssignableFrom(type)){
    //if the requested type is not a Sesame value, we need also to
    //transform results
    iterator = IteratorUtils.transformedIterator(
      iterator, // the already filtered values
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); // need to be transformed
  }
  return (Iterator<T>)iterator; 
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
@SuppressWarnings("unchecked")
public Iterator<Object> get(String field) throws IllegalArgumentException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.filteredIterator(
      IteratorUtils.transformedIterator(
        model.filter(subject, property, null).iterator(), 
        objectTransFormer), // get the object from the statement
      notPredicate(instanceofPredicate(BNode.class))),
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); // transform the values
}

代码示例来源：origin: apache/stanbol

@Override
@SuppressWarnings("unchecked")
public Iterator<Object> get(String field) throws IllegalArgumentException {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.filteredIterator(
      IteratorUtils.transformedIterator(
        model.filter(subject, property, null).iterator(), 
        objectTransFormer), // get the object from the statement
      notPredicate(instanceofPredicate(BNode.class))),
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); // transform the values
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
@SuppressWarnings("unchecked")
public Iterator<Text> get(String field, String...languages) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.transformedIterator(
      IteratorUtils.filteredIterator(
        IteratorUtils.transformedIterator(
          model.filter(subject, property, null).iterator(), 
          objectTransFormer), // get the object from the statement
        new ValueTypeFilter<Text>(languages)), //filter languages
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.STRING_LITERAL_TO_TEXT_TRANSFORMER), //transform strings to Text
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: org.apache.stanbol/org.apache.stanbol.entityhub.model.sesame

@Override
@SuppressWarnings("unchecked")
public Iterator<Text> getText(String field) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.transformedIterator(
      IteratorUtils.filteredIterator(
        IteratorUtils.transformedIterator(
          model.filter(subject, property, null).iterator(), 
          objectTransFormer), // get the object from the statement
        new ValueTypeFilter<Text>(Text.class)), //filter plain literals
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.STRING_LITERAL_TO_TEXT_TRANSFORMER),
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: apache/stanbol

@Override
@SuppressWarnings("unchecked")
public Iterator<Text> get(String field, String...languages) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.transformedIterator(
      IteratorUtils.filteredIterator(
        IteratorUtils.transformedIterator(
          model.filter(subject, property, null).iterator(), 
          objectTransFormer), // get the object from the statement
        new ValueTypeFilter<Text>(languages)), //filter languages
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.STRING_LITERAL_TO_TEXT_TRANSFORMER), //transform strings to Text
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: apache/stanbol

@Override
@SuppressWarnings("unchecked")
public Iterator<Text> getText(String field) {
  if(field == null){
    throw new IllegalArgumentException("The parsed field MUST NOT be NULL");
  } else if(field.isEmpty()){
    throw new IllegalArgumentException("The parsed field MUST NOT be Empty");
  }
  URI property = sesameFactory.createURI(field);
  return IteratorUtils.transformedIterator(
    IteratorUtils.transformedIterator(
      IteratorUtils.filteredIterator(
        IteratorUtils.transformedIterator(
          model.filter(subject, property, null).iterator(), 
          objectTransFormer), // get the object from the statement
        new ValueTypeFilter<Text>(Text.class)), //filter plain literals
      org.apache.stanbol.entityhub.model.sesame.ModelUtils.STRING_LITERAL_TO_TEXT_TRANSFORMER),
    org.apache.stanbol.entityhub.model.sesame.ModelUtils.VALUE_TRANSFORMER); //transform to Text instances
}

代码示例来源：origin: apache/marmotta

/**
 * Get the statements for the query pattern passed as arguments. In case the subject resource is acceptable for caching,
 * refreshes the cache for this resource and returns a merged query result together with the wrapped connection.
 * Otherwise, simply delegates to the wrapped connection.
 *
 * @param subj
 * @param pred
 * @param obj
 * @param includeInferred
 * @param contexts
 * @return
 * @throws SailException
 */
@Override
public CloseableIteration<? extends Statement, SailException> getStatements(Resource subj, URI pred, Value obj, boolean includeInferred, Resource... contexts) throws SailException {
  if (accept(subj)) {
    log.debug("Refreshing resource: {}", subj.stringValue());
    final Model cached = ldcache.get((URI)subj);
    // join the results of the cache connection and the wrapped connection in a single result
    return new UnionIteration<>(
        new CloseableIteratorIteration<Statement, SailException>(cached.iterator()),
        super.getStatements(subj, pred, obj, includeInferred, contexts)
    );
  } else {
    return super.getStatements(subj, pred, obj, includeInferred, contexts);
  }
}

代码示例来源：origin: org.openrdf.alibaba/alibaba-repository-optimistic

@Override
public CloseableIteration<BindingSet, QueryEvaluationException> evaluate(
    BindingSet bindings) throws QueryEvaluationException {
  if (this.bindings != null) {
    QueryBindingSet b = new QueryBindingSet(bindings);
    b.addAll(this.bindings);
    bindings = b;
  }
  CloseableIteration<? extends Statement, QueryEvaluationException> stIter = null;
  try {
    Resource[] contexts = contexts(sp, dataset, bindings);
    if (contexts == null)
      return new EmptyIteration<BindingSet, QueryEvaluationException>();
    Iterator<Statement> iter = filter(model, bindings).iterator();
    stIter = new CloseableIteratorIteration<Statement, QueryEvaluationException>(iter);
    if (contexts.length == 0 && sp.getScope() == Scope.NAMED_CONTEXTS) {
      stIter = new NamedContextCursor(stIter);
    }
  } catch (ClassCastException e) {
    // Invalid value type for subject, predicate and/or context
    return new EmptyIteration<BindingSet, QueryEvaluationException>();
  }
  // The same variable might have been used multiple times in this
  // StatementPattern, verify value equality in those cases.
  stIter = new StatementPatternCursor(stIter, sp);
  // Return an iterator that converts the statements to var bindings
  return new StatementBindingSetCursor(stIter, sp, bindings);
}

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