org.apache.tinkerpop.gremlin.structure.Element类的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.apache.tinkerpop.gremlin.structure.Element类的一些代码示例，展示了Element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。Element类的具体详情如下：
包路径：org.apache.tinkerpop.gremlin.structure.Element
类名称：Element

Element介绍

[英]An Element is the base class for both Vertex and Edge. An Element has an identifier that must be unique to its inheriting classes ( Vertex or Edge). An Element can maintain a collection of Property objects. Typically, objects are Java primitives (e.g. String, long, int, boolean, etc.)
[中]元素是顶点和边的基类。元素的标识符必须对其继承类（顶点或边）唯一。元素可以维护属性对象的集合。通常，对象是Java原语（例如String、long、int、boolean等）

代码示例

代码示例来源：origin: thinkaurelius/titan

  1. public static long getCompareId(Element element) {
  2.   Object id = element.id();
  3.   if (id instanceof Long) return (Long)id;
  4.   else if (id instanceof RelationIdentifier) return ((RelationIdentifier)id).getRelationId();
  5.   else throw new IllegalArgumentException("Element identifier has unrecognized type: " + id);
  6. }

代码示例来源：origin: apache/tinkerpop

  1. @Override
  2. public <V> Property<V> property(final String key) {
  3.   return this.baseElement.property(key);
  4. }

代码示例来源：origin: apache/tinkerpop

  1. public static Map<String, Object> propertyValueMap(final Element element, final String... propertyKeys) {
  2.   final Map<String, Object> values = new HashMap<>();
  3.   element.properties(propertyKeys).forEachRemaining(property -> values.put(property.key(), property.value()));
  4.   return values;
  5. }

代码示例来源：origin: thinkaurelius/titan

  1. @Override
  2. protected Iterator<E> flatMap(final Traverser.Admin<Element> traverser) {
  3.   if (useMultiQuery) { //it is guaranteed that all elements are vertices
  4.     assert multiQueryResults != null;
  5.     return convertIterator(multiQueryResults.get(traverser.get()));
  6.   } else if (traverser.get() instanceof Vertex) {
  7.     TitanVertexQuery query = makeQuery((TitanTraversalUtil.getTitanVertex(traverser)).query());
  8.     return convertIterator(query.properties());
  9.   } else {
  10.     //It is some other element (edge or vertex property)
  11.     Iterator<E> iter;
  12.     if (getReturnType().forValues()) {
  13.       assert orders.isEmpty() && hasContainers.isEmpty();
  14.       iter = traverser.get().values(getPropertyKeys());
  15.     } else {
  16.       //this asks for properties
  17.       assert orders.isEmpty();
  18.       //HasContainers don't apply => empty result set
  19.       if (!hasContainers.isEmpty()) return Collections.emptyIterator();
  20.       iter = (Iterator<E>) traverser.get().properties(getPropertyKeys());
  21.     }
  22.     if (limit!=Query.NO_LIMIT) iter = Iterators.limit(iter,limit);
  23.     return iter;
  24.   }
  25. }

代码示例来源：origin: apache/tinkerpop

  1. protected DetachedElement(final Element element) {
  2.   this.id = element.id();
  3.   try {
  4.     this.label = element.label();
  5.   } catch (final UnsupportedOperationException e) {   // ghetto.
  6.     this.label = Vertex.DEFAULT_LABEL;
  7.   }
  8. }

代码示例来源：origin: apache/tinkerpop

  1. @Override
  2. protected Map<K, E> map(final Traverser.Admin<Element> traverser) {
  3.   final Map<Object, Object> map = new LinkedHashMap<>();
  4.   final Element element = traverser.get();
  5.   final boolean isVertex = element instanceof Vertex;
  6.   if (this.returnType == PropertyType.VALUE) {
  7.     if (includeToken(WithOptions.ids)) map.put(T.id, element.id());
  8.     if (element instanceof VertexProperty) {
  9.       if (includeToken(WithOptions.keys)) map.put(T.key, ((VertexProperty<?>) element).key());
  10.       if (includeToken(WithOptions.values)) map.put(T.value, ((VertexProperty<?>) element).value());
  11.     } else {
  12.       if (includeToken(WithOptions.labels)) map.put(T.label, element.label());
  13.       element.properties(this.propertyKeys) :
  14.       TraversalUtil.applyAll(traverser, this.propertyTraversal);
  15.     final Object value = this.returnType == PropertyType.VALUE ? property.value() : property;
  16.     if (isVertex) {
  17.       map.compute(property.key(), (k, v) -> {
  18.         final List<Object> values = v != null ? (List<Object>) v : new ArrayList<>();
  19.         values.add(value);
  20.       });
  21.     } else {
  22.       map.put(property.key(), value);

代码示例来源：origin: apache/tinkerpop

  1. @Override
  2. public <O extends OutputShim> void write(final KryoShim<?, O> kryo, final O output, final Property property) {
  3.   output.writeString(property.key());
  4.   kryo.writeClassAndObject(output, property.value());
  5.   kryo.writeClassAndObject(output, property.element().id());
  6.   output.writeString(property.element().label());
  7. }

代码示例来源：origin: apache/tinkerpop

  1. public void createKeyIndex(final String key) {
  2.   if (null == key)
  3.     throw Graph.Exceptions.argumentCanNotBeNull("key");
  4.   if (key.isEmpty())
  5.     throw new IllegalArgumentException("The key for the index cannot be an empty string");
  6.   if (this.indexedKeys.contains(key))
  7.     return;
  8.   this.indexedKeys.add(key);
  9.   (Vertex.class.isAssignableFrom(this.indexClass) ?
  10.       this.graph.vertices.values().<T>parallelStream() :
  11.       this.graph.edges.values().<T>parallelStream())
  12.       .map(e -> new Object[]{((T) e).property(key), e})
  13.       .filter(a -> ((Property) a[0]).isPresent())
  14.       .forEach(a -> this.put(key, ((Property) a[0]).value(), (T) a[1]));
  15. }

代码示例来源：origin: apache/tinkerpop

  1. public static Map<String, Property> propertyMap(final Element element, final String... propertyKeys) {
  2.   final Map<String, Property> propertyMap = new HashMap<>();
  3.   element.properties(propertyKeys).forEachRemaining(property -> propertyMap.put(property.key(), property));
  4.   return propertyMap;
  5. }

代码示例来源：origin: org.jboss.windup.graph/windup-graph-api

  1. /**
  2.  * A string representation of this vertex, showing it's properties in a JSON-like format.
  3.  */
  4. default String toPrettyString()
  5. {
  6.   Element v = getElement();
  7.   StringBuilder result = new StringBuilder();
  8.   result.append("[").append(v.toString()).append("=");
  9.   result.append("{");
  10.   boolean hasSome = false;
  11.   for (String propKey : v.keys())
  12.   {
  13.     hasSome = true;
  14.     Iterator<? extends Property<Object>> propVal = v.properties(propKey);
  15.     List<Object> propValues = new ArrayList<>();
  16.     propVal.forEachRemaining(prop -> propValues.add(prop.value()));
  17.     if (propValues.size() == 1)
  18.       result.append(propKey).append(": ").append(propValues.get(0));
  19.     else
  20.       result.append(propKey).append(": ").append(propValues);
  21.     result.append(", ");
  22.   }
  23.   if (hasSome)
  24.   {
  25.     result.delete(result.length() - 2, result.length());
  26.   }
  27.   result.append("}]");
  28.   return result.toString();
  29. }

代码示例来源：origin: apache/tinkerpop

  1. /**
  2.  * Retrieve the properties associated with a particular element.
  3.  * The result is a Object[] where odd indices are String keys and even indices are the values.
  4.  *
  5.  * @param element          the element to retrieve properties from
  6.  * @param includeId        include Element.ID in the key/value list
  7.  * @param includeLabel     include Element.LABEL in the key/value list
  8.  * @param propertiesToCopy the properties to include with an empty list meaning copy all properties
  9.  * @return a key/value array of properties where odd indices are String keys and even indices are the values.
  10.  */
  11. public static Object[] getProperties(final Element element, final boolean includeId, final boolean includeLabel, final Set<String> propertiesToCopy) {
  12.   final List<Object> keyValues = new ArrayList<>();
  13.   if (includeId) {
  14.     keyValues.add(T.id);
  15.     keyValues.add(element.id());
  16.   }
  17.   if (includeLabel) {
  18.     keyValues.add(T.label);
  19.     keyValues.add(element.label());
  20.   }
  21.   element.keys().forEach(key -> {
  22.     if (propertiesToCopy.isEmpty() || propertiesToCopy.contains(key)) {
  23.       keyValues.add(key);
  24.       keyValues.add(element.value(key));
  25.     }
  26.   });
  27.   return keyValues.toArray(new Object[keyValues.size()]);
  28. }

代码示例来源：origin: org.hawkular.inventory/hawkular-inventory-impl-tinkerpop

  1. @Override
  2. public boolean isBackendInternal(Element element) {
  3.   return (element instanceof Vertex && element.property(Constants.Property.__type.name()).value().equals(
  4.       Constants.InternalType.__identityHash.name())) || (element instanceof Edge && (
  5.           element.label().equals(Constants.InternalEdge.__withIdentityHash.name()) ||
  6.           element.label().equals(Constants.InternalEdge.__containsIdentityHash.name())
  7.       ));
  8. }

代码示例来源：origin: apache/tinkerpop

  1. /**
  2.  * Get the values of properties as an {@link Iterator}.
  3.  */
  4. public default <V> Iterator<V> values(final String... propertyKeys) {
  5.   return IteratorUtils.map(this.<V>properties(propertyKeys), property -> property.value());
  6. }

代码示例来源：origin: apache/tinkerpop

  1. public final boolean test(final Element element) {
  2.   // it is OK to evaluate equality of ids via toString(), given that the test suite enforces the value of
  3.   // id().toString() to be a first class representation of the identifier. a string test is only executed
  4.   // if the predicate value is a String.  this allows stuff like: g.V().has(id,lt(10)) to work properly
  5.   if (this.key.equals(T.id.getAccessor()))
  6.     return testingIdString ? testIdAsString(element) : testId(element);
  7.   else if (this.key.equals(T.label.getAccessor()))
  8.     return testLabel(element);
  9.   else if (element instanceof VertexProperty && this.key.equals(T.value.getAccessor()))
  10.     return testValue((VertexProperty) element);
  11.   else if (element instanceof VertexProperty && this.key.equals(T.key.getAccessor()))
  12.     return testKey((VertexProperty) element);
  13.   else {
  14.     if (element instanceof Vertex) {
  15.       final Iterator<? extends Property> itty = element.properties(this.key);
  16.       while (itty.hasNext()) {
  17.         if (testValue(itty.next()))
  18.           return true;
  19.       }
  20.       return false;
  21.     } else {
  22.       final Property property = element.property(this.key);
  23.       return property.isPresent() && testValue(property);
  24.     }
  25.   }
  26. }

代码示例来源：origin: HuygensING/timbuctoo

  1. private void updateExistingProperties(LogOutput dbLog) {
  2.  Set<String> existing = Sets.intersection(newKeys, oldKeys);
  3.  existing.forEach(key -> {
  4.   Property<Object> latestProperty = element.property(key);
  5.   if (!Objects.equals(latestProperty.value(), prevElement.value(key))) {
  6.    dbLog.updateProperty(latestProperty);
  7.   }
  8.  });
  9. }

代码示例来源：origin: apache/tinkerpop

  1. private void assertPropertyValue(final Element element) {
  2.   if (value instanceof Map)
  3.     tryCommit(graph, graph -> {
  4.       final Map map = element.<Map>property("aKey").value();
  5.       assertEquals(((Map) value).size(), map.size());
  6.       ((Map) value).keySet().forEach(k -> assertEquals(((Map) value).get(k), map.get(k)));
  7.   else if (value instanceof List)
  8.     tryCommit(graph, graph -> {
  9.       final List l = element.<List>property("aKey").value();
  10.       assertEquals(((List) value).size(), l.size());
  11.       for (int ix = 0; ix < ((List) value).size(); ix++) {
  12.   else if (value instanceof MockSerializable)
  13.     tryCommit(graph, graph -> {
  14.       final MockSerializable mock = element.<MockSerializable>property("aKey").value();
  15.       assertEquals(((MockSerializable) value).getTestField(), mock.getTestField());
  16.     });
  17.   else if (value instanceof boolean[])
  18.     tryCommit(graph, graph -> {
  19.       final boolean[] l = element.<boolean[]>property("aKey").value();
  20.       assertEquals(((boolean[]) value).length, l.length);
  21.       for (int ix = 0; ix < ((boolean[]) value).length; ix++) {
  22.   else if (value instanceof double[])
  23.     tryCommit(graph, graph -> {
  24.       final double[] l = element.<double[]>property("aKey").value();
  25.       assertEquals(((double[]) value).length, l.length);
  26.       for (int ix = 0; ix < ((double[]) value).length; ix++) {

代码示例来源：origin: MartinHaeusler/chronos

  1. @Override
  2. public boolean apply(final V element) {
  3.   ChronoElement chronoElement = (ChronoElement) element;
  4.   if (chronoElement.isRemoved()) {
  5.     // never consider removed elements
  6.     return false;
  7.   }
  8.   for (SearchSpecification<?> searchSpec : this.searchSpecifications) {
  9.     if (element.property(searchSpec.getProperty()).isPresent() == false) {
  10.       // the property in question is not present, it is NOT possible to make
  11.       // any decision if it matches the given search criterion or not. In particular,
  12.       // when the search is negated (e.g. 'not equals'), we decide to have a non-match
  13.       // for non-existing properties
  14.       return false;
  15.     }
  16.     Object propertyValue = element.value(searchSpec.getProperty());
  17.     boolean searchSpecApplies = ChronoGraphQueryUtil.searchSpecApplies(searchSpec, propertyValue);
  18.     if (searchSpecApplies == false) {
  19.       // element failed to pass this filter
  20.       return false;
  21.     }
  22.   }
  23.   // element passed all filters
  24.   return true;
  25. }

代码示例来源：origin: uk.gov.dstl.baleen/baleen-graph

  1. private Map<String, Object> aggregateProperties(Element element) {
  2.  Map<String, Object> mention = new HashMap<>();
  3.  mention.put(ID_PROPERTY, element.id());
  4.  options
  5.    .getAggregateProperties()
  6.    .forEach(p -> element.property(p).ifPresent(value -> mention.put(p, value)));
  7.  return mention;
  8. }

代码示例来源：origin: com.syncleus.ferma/ferma

  1. @Override
  2. public void setProperty(final String name, final Object value) {
  3.   if (value == null) {
  4.     getElement().property(name).remove();
  5.   } else if (value instanceof Enum) {
  6.     getElement().property(name, value.toString());
  7.   } else {
  8.     getElement().property(name, value);
  9.   }
  10. }

代码示例来源：origin: apache/tinkerpop

  1. /**
  2.  * Add or set a property value for the {@code Element} given its key.
  3.  */
  4. public <V> Property<V> property(final String key, final V value);

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