org.openrdf.query.algebra.Extension.getElements()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.openrdf.query.algebra.Extension.getElements()方法的一些代码示例，展示了Extension.getElements()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。Extension.getElements()方法的具体详情如下：
包路径：org.openrdf.query.algebra.Extension
类名称：Extension
方法名：getElements

Extension.getElements介绍

暂无

代码示例

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

@Override
public boolean equals(Object other) {
  if (other instanceof Extension && super.equals(other)) {
    Extension o = (Extension)other;
    return elements.equals(o.getElements());
  }
  return false;
}

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

@Override
  public Extension clone() {
    Extension clone = (Extension)super.clone();

    clone.elements = new ArrayList<ExtensionElem>(getElements().size());
    for (ExtensionElem elem : getElements()) {
      clone.addElement(elem.clone());
    }

    return clone;
  }
}

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

@Override
public void meet(Extension node) {
  extension = node;
  List<ExtensionElem> elements = node.getElements();
  // NB: preserve ExtensionElem order
  extensionExprs = new LinkedHashMap<String, ValueExpr>(elements.size());
  for (ExtensionElem elem : elements) {
    extensionExprs.put(elem.getName(), elem.getExpr());
  }
}

代码示例来源：origin: eu.fbk.rdfpro/rdfpro-rules

public static ValueExpr parseValueExpr(final String string, @Nullable final String baseURI,
    @Nullable final Map<String, String> namespaces) throws MalformedQueryException {
  Objects.requireNonNull(string);
  final TupleExpr expr = parseQuery("SELECT ((" + string + ") AS ?dummy) WHERE {}", baseURI,
      namespaces).getTupleExpr();
  return ((Extension) ((Projection) expr).getArg()).getElements().get(0).getExpr();
}

代码示例来源：origin: eu.fbk.knowledgestore/ks-server

private static Map<String, ExtensionElem> extractExtensions(final TupleExpr rootNode) {
  final Map<String, ExtensionElem> map = Maps.newHashMap();
  for (final UnaryTupleOperator node : extractQueryNodes(rootNode, true)) {
    if (node instanceof Extension) {
      for (final ExtensionElem elem : ((Extension) node).getElements()) {
        final String variable = elem.getName();
        final ValueExpr expression = elem.getExpr();
        if (!(expression instanceof Var)
            || !((Var) expression).getName().equals(variable)) {
          map.put(variable, elem);
        }
      }
    }
  }
  return map;
}

代码示例来源：origin: eu.fbk.rdfpro/rdfpro-rules

private static Map<String, ExtensionElem> extractExtensions(final TupleExpr rootNode) {
  final Map<String, ExtensionElem> map = new HashMap<>();
  for (final UnaryTupleOperator node : extractQueryNodes(rootNode, true)) {
    if (node instanceof Extension) {
      for (final ExtensionElem elem : ((Extension) node).getElements()) {
        final String variable = elem.getName();
        final ValueExpr expression = elem.getExpr();
        if (!(expression instanceof Var)
            || !((Var) expression).getName().equals(variable)) {
          map.put(variable, elem);
        }
      }
    }
  }
  return map;
}

代码示例来源：origin: org.apache.rya/rya.api.evaluation

/**
 * Constructs an instance of {@link ProjectionEvaluator}.
 *
 * @param projectionElems - Defines the structure of the resulting value. (not null)
 * @param extensions - Extra information about the projection elements when there are anonymous constants or blank
 *   nodes within the projection elements. (not null)
 */
public ProjectionEvaluator(final ProjectionElemList projectionElems, final Optional<Extension> extensions) {
  this.projectionElems = requireNonNull(projectionElems);
  requireNonNull(extensions);
  // Find all extensions that represent constant insertions.
  if(extensions.isPresent()) {
    for(final ExtensionElem extensionElem : extensions.get().getElements()) {
      final ValueExpr valueExpr = extensionElem.getExpr();
      // If the extension is a ValueConstant, store it so that they may be added to the binding sets.
      if(valueExpr instanceof ValueConstant) {
        final String sourceName = extensionElem.getName();
        final Value targetValue = ((ValueConstant) valueExpr).getValue();
        constantSources.put(sourceName, targetValue);
      }
      // If the extension is a BNodeGenerator, keep track of the name so that we know we have to generate an ID for it.
      else if(valueExpr instanceof BNodeGenerator) {
        final String sourceName = extensionElem.getName();
        anonymousSources.add( sourceName );
      }
    }
  }
}

代码示例来源：origin: apache/marmotta

@Override
public void meet(Extension node) throws RuntimeException {
  // visit children before, as there might be dependencies
  super.meet(node);
  for(ExtensionElem elem : node.getElements()) {
    if(elem.getExpr() instanceof Var && ((Var) elem.getExpr()).getName().equals(elem.getName())) {
      log.debug("ignoring self-aliasing of variable {}", elem.getName());
    } else {
      elements.add(elem);
    }
  }
}

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

@Override
public void meet(Extension node) {
  handleType(SeRQO.EXTENSION);
  handleChildList(SeRQO.ELEMENTS, node.getElements());
  super.meet(node);
}

代码示例来源：origin: org.apache.rya/rya.api.evaluation

/**
 * Make a {@link MultiProjectionEvaluator} that processes the logic of a {@link MultiProjection}.
 *
 * @param multiProjection - Defines the projections that will be processed. (not null)
 * @param bNodeIdFactory - Creates the IDs for Blank Nodes. (not null)
 * @return A {@link MultiProjectionEvaluator} for the provided {@link MultiProjection}.
 */
public static MultiProjectionEvaluator make(final MultiProjection multiProjection, final BNodeIdFactory bNodeIdFactory) {
  requireNonNull(multiProjection);
  // Figure out if there are extensions.
  final TupleExpr arg = multiProjection.getArg();
  final Optional<Extension> extension = (arg instanceof Extension) ? Optional.of((Extension)arg): Optional.empty();
  // If there are, iterate through them and find any blank node source names.
  final Set<String> blankNodeSourceNames = new HashSet<>();
  if(extension.isPresent()) {
    for(final ExtensionElem elem : extension.get().getElements()) {
      if(elem.getExpr() instanceof BNodeGenerator) {
        blankNodeSourceNames.add( elem.getName() );
      }
    }
  }
  // Create a ProjectionEvaluator for each projection that is part of the multi.
  final Set<ProjectionEvaluator> projections = new HashSet<>();
  for(final ProjectionElemList projectionElemList : multiProjection.getProjections()) {
    projections.add( new ProjectionEvaluator(projectionElemList, extension) );
  }
  return new MultiProjectionEvaluator(projections, blankNodeSourceNames, bNodeIdFactory);
}

代码示例来源：origin: org.apache.rya/mongodb.rya

@Override
public void meet(Extension extensionNode) throws Exception {
  extensionNode.visitChildren(this);
  if (extensionNode.getArg() instanceof AggregationPipelineQueryNode && extensionNode.getParentNode() != null) {
    AggregationPipelineQueryNode pipelineNode = (AggregationPipelineQueryNode) extensionNode.getArg();
    if (pipelineNode.extend(extensionNode.getElements())) {
      extensionNode.replaceWith(pipelineNode);
    }
  }
}

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

@Override
public void meet(Extension node)
  throws RDFHandlerException
{
  if (inlineBindings != null && inlineBindings.extension == node) {
    // this is the first Extension node and has already been handled
    // by meetExtension()
    // to produce inline bindings in SELECT so we can skip it here
    node.getArg().visit(this);
  }
  else {
    // any further Extension nodes produce BIND() clauses
    node.getArg().visit(this);
    for (ExtensionElem elem : node.getElements()) {
      elem.visit(this);
    }
  }
}

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

@Override
  public void updateQueryModelNodes(boolean hasResult) {
    QueryModelNode replacementNode = hasResult ? new SingletonSet() : new EmptySet();
    geoStatement.replaceWith(replacementNode);

    if(hasResult) {
      filter.replaceWith(filter.getArg());
    } else {
      filter.replaceWith(new EmptySet());
    }

    if(functionParent instanceof ExtensionElem) {
      Extension extension = (Extension) functionParent.getParentNode();
      List<ExtensionElem> elements = extension.getElements();
      if(elements.size() > 1) {
        elements.remove(functionParent);
      } else {
        extension.replaceWith(extension.getArg());
      }
    }
  }
}

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

@Override
  public void updateQueryModelNodes(boolean hasResult) {
    QueryModelNode replacementNode = hasResult ? new SingletonSet() : new EmptySet();
    geoStatement.replaceWith(replacementNode);

    if(hasResult) {
      filter.replaceWith(filter.getArg());
    } else {
      filter.replaceWith(new EmptySet());
    }

    if(functionParent instanceof ExtensionElem) {
      Extension extension = (Extension) functionParent.getParentNode();
      List<ExtensionElem> elements = extension.getElements();
      if(elements.size() > 1) {
        elements.remove(functionParent);
      } else {
        extension.replaceWith(extension.getArg());
      }
    }
  }
}

代码示例来源：origin: eu.fbk.rdfpro/rdfpro-rules

for (final ExtensionElem elem : new ArrayList<>(extension.getElements())) {
  final Set<String> elemVars = extractVariables(elem.getExpr());
  Extension newArg = null;
    extension.getElements().remove(elem);
    dirty = true;
if (extension.getElements().isEmpty()) {
  expr = (TupleExpr) replaceNode(expr, extension, extension.getArg());

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

@Override
  public BindingSet convert(BindingSet sourceBindings)
    throws QueryEvaluationException
  {
    QueryBindingSet targetBindings = new QueryBindingSet(sourceBindings);

    for (ExtensionElem extElem : extension.getElements()) {
      ValueExpr expr = extElem.getExpr();
      if (!(expr instanceof AggregateOperator)) {
        try {
          // we evaluate each extension element over the targetbindings, so that bindings from
          // a previous extension element in this same extension can be used by other extension elements. 
          // e.g. if a projection contains (?a + ?b as ?c) (?c * 2 as ?d)
          Value targetValue = strategy.evaluate(extElem.getExpr(), targetBindings);

          if (targetValue != null) {
            // Potentially overwrites bindings from super
            targetBindings.setBinding(extElem.getName(), targetValue);
          }
        }
        catch (ValueExprEvaluationException e) {
          // silently ignore type errors in extension arguments. They should not cause the 
          // query to fail but just result in no additional binding.
        }
      }
    }

    return targetBindings;
  }
}

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

@Override
public TupleExpr visit(ASTDescribe node, Object data)
  throws VisitorException
{
  TupleExpr tupleExpr = (TupleExpr)data;
  if (tupleExpr == null) {
    tupleExpr = new SingletonSet();
  }
  Extension e = new Extension();
  ProjectionElemList projectionElements = new ProjectionElemList();
  for (int i = 0; i < node.jjtGetNumChildren(); i++) {
    ValueExpr resource = (ValueExpr)node.jjtGetChild(i).jjtAccept(this, null);
    if (resource instanceof Var) {
      projectionElements.addElement(new ProjectionElem(((Var)resource).getName()));
    }
    else {
      String alias = "_describe_" + UUID.randomUUID().toString().replaceAll("-", "_");
      ExtensionElem elem = new ExtensionElem(resource, alias);
      e.addElement(elem);
      projectionElements.addElement(new ProjectionElem(alias));
    }
  }
  if (!e.getElements().isEmpty()) {
    e.setArg(tupleExpr);
    tupleExpr = e;
  }
  Projection p = new Projection(tupleExpr, projectionElements);
  return new DescribeOperator(p);
}

代码示例来源：origin: eu.fbk.knowledgestore/ks-server

@Override
public void meet(final Extension n) {
  emit(n.getArg());
  if (!(n.getArg() instanceof SingletonSet)) {
    newline();
  }
  boolean first = true;
  for (final ExtensionElem e : n.getElements()) {
    final ValueExpr expr = e.getExpr();
    if (!(expr instanceof Var) || !((Var) expr).getName().equals(e.getName())) {
      if (!first) {
        newline();
      }
      emit("BIND (").emit(expr).emit(" AS ?").emit(e.getName()).emit(")");
      first = false;
    }
  }
}

代码示例来源：origin: eu.fbk.rdfpro/rdfpro-rules

@Override
public void meet(final Extension n) {
  emit(n.getArg());
  if (!(n.getArg() instanceof SingletonSet)) {
    newline();
  }
  boolean first = true;
  for (final ExtensionElem e : n.getElements()) {
    final ValueExpr expr = e.getExpr();
    if (!(expr instanceof Var) || !((Var) expr).getName().equals(e.getName())) {
      if (!first) {
        newline();
      }
      emit("BIND (").emit(expr).emit(" AS ?").emit(e.getName()).emit(")");
      first = false;
    }
  }
}

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

if (!extension.getElements().isEmpty()) {
  extension.setArg(result);
  result = extension;

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