本文整理了Java中org.apache.tinkerpop.gremlin.structure.Property.isPresent()方法的一些代码示例，展示了Property.isPresent()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。Property.isPresent()方法的具体详情如下：
包路径：org.apache.tinkerpop.gremlin.structure.Property
类名称：Property
方法名：isPresent

Property.isPresent介绍

[英]Whether the property is empty or not.
[中]属性是否为空。

代码示例

代码示例来源：origin: thinkaurelius/titan

@Override
public void map(final Vertex vertex, final MapEmitter<Object, Double> emitter) {
  final Property pageRank = vertex.property(PageRankVertexProgram.PAGE_RANK);
  if (pageRank.isPresent()) {
    emitter.emit(vertex.id(), (Double) pageRank.value());
  }
}

代码示例来源：origin: thinkaurelius/titan

@Override
public void map(final Vertex vertex, final MapEmitter<Object, Long> emitter) {
  final Property distance = vertex.property(ShortestDistanceVertexProgram.DISTANCE);
  if (distance.isPresent()) {
    emitter.emit(vertex.id(), (Long) distance.value());
  }
}

代码示例来源：origin: JanusGraph/janusgraph

@Override
public void map(final Vertex vertex, final MapEmitter<Object, Long> emitter) {
  final Property distance = vertex.property(ShortestDistanceVertexProgram.DISTANCE);
  if (distance.isPresent()) {
    emitter.emit(vertex.id(), (Long) distance.value());
  }
}

代码示例来源：origin: JanusGraph/janusgraph

@Override
public void map(final Vertex vertex, final MapEmitter<Object, Double> emitter) {
  final Property pageRank = vertex.property(PageRankVertexProgram.PAGE_RANK);
  if (pageRank.isPresent()) {
    emitter.emit(vertex.id(), (Double) pageRank.value());
  }
}

代码示例来源：origin: JanusGraph/janusgraph

private void assertGeoshape(Function<Geoshape,Geoshape> makeGeoshape) {
  graph.traversal().E().has("place").toList().forEach(e-> {
    assertTrue(e.property("shape").isPresent());
    Geoshape place = (Geoshape) e.property("place").value();
    Geoshape expected = makeGeoshape.apply(place);
    Geoshape actual = (Geoshape) e.property("shape").value();
    assertEquals(expected, actual);
  });
}

代码示例来源：origin: thinkaurelius/titan

assertEquals(v1id, getId(v));
TitanEdge e = Iterables.getOnlyElement(changes.getEdges(v, Change.REMOVED, Direction.OUT, "knows"));
assertFalse(e.property("weight").isPresent());
assertEquals(v, e.vertex(Direction.IN));
e = Iterables.getOnlyElement(changes.getEdges(v, Change.ADDED, Direction.OUT, "knows"));

代码示例来源：origin: apache/tinkerpop

@Override
public boolean isPresent() {
  return this.property.isPresent();
}

代码示例来源：origin: apache/tinkerpop

@Override
public boolean isPresent() {
  return this.baseProperty.isPresent();
}

代码示例来源：origin: thinkaurelius/titan

assertEquals(111.1, v1.<Float>value("weight").doubleValue(), 0.01);
Edge e = getOnlyElement(v1.query().direction(Direction.OUT).labels("knows").edges());
assertFalse(e.property("weight").isPresent());
e.property("weight", 44.4);
tx2.commit();

代码示例来源：origin: JanusGraph/janusgraph

assertEquals(111.1, v1.<Float>value("weight").doubleValue(), 0.01);
final Edge e = Iterables.getOnlyElement(v1.query().direction(Direction.OUT).labels("knows").edges());
assertFalse(e.property("weight").isPresent());
e.property("weight", 44.4);
tx2.commit();
        JanusGraphEdge e1
            = Iterables.getOnlyElement(changes.getEdges(v, Change.REMOVED, Direction.OUT, "knows"));
        assertFalse(e1.property("weight").isPresent());
        assertEquals(v, e1.vertex(Direction.IN));
        e1 = Iterables.getOnlyElement(changes.getEdges(v, Change.ADDED, Direction.OUT, "knows"));

代码示例来源：origin: apache/tinkerpop

/**
 * If the value is present, return the value, else return the provided value.
 *
 * @param otherValue The value to return if the property is not present
 * @return A value
 */
public default V orElse(final V otherValue) {
  return this.isPresent() ? this.value() : otherValue;
}

代码示例来源：origin: apache/tinkerpop

/**
 * If the value is present, return the value, else generate a value given the {@link Supplier}.
 *
 * @param valueSupplier The supplier to use to generate a value if the property is not present
 * @return A value
 */
public default V orElseGet(final Supplier<? extends V> valueSupplier) {
  return this.isPresent() ? this.value() : valueSupplier.get();
}

代码示例来源：origin: apache/tinkerpop

/**
 * If the property is present, the consume the value as specified by the {@link Consumer}.
 *
 * @param consumer The consumer to process the existing value.
 */
public default void ifPresent(final Consumer<? super V> consumer) {
  if (this.isPresent())
    consumer.accept(this.value());
}

代码示例来源：origin: thinkaurelius/titan

v3 = graph.addVertex();
Edge e = v1.addEdge("knows", v3);
assertFalse(e.property("age").isPresent());

代码示例来源：origin: JanusGraph/janusgraph

v3 = graph.addVertex();
Edge e = v1.addEdge("knows", v3);
assertFalse(e.property("age").isPresent());

代码示例来源：origin: apache/tinkerpop

@Override
public void map(final Vertex vertex, final MapEmitter<Serializable, Long> emitter) {
  final Property<Serializable> cluster = vertex.property(PeerPressureVertexProgram.CLUSTER);
  if (cluster.isPresent()) {
    emitter.emit(cluster.value(), 1l);
  }
}

代码示例来源：origin: apache/tinkerpop

@Override
public <V> Property<V> property(final String key, final V value) {
  if (this.removed) throw elementAlreadyRemoved(Edge.class, id);
  ElementHelper.validateProperty(key, value);
  final Property oldProperty = super.property(key);
  final Property<V> newProperty = new TinkerProperty<>(this, key, value);
  if (null == this.properties) this.properties = new HashMap<>();
  this.properties.put(key, newProperty);
  TinkerHelper.autoUpdateIndex(this, key, value, oldProperty.isPresent() ? oldProperty.value() : null);
  return newProperty;
}

代码示例来源：origin: apache/tinkerpop

@Override
public void map(final Vertex vertex, final MapEmitter<Object, Double> emitter) {
  final Property pageRank = vertex.property(PageRankVertexProgram.PAGE_RANK);
  if (pageRank.isPresent()) {
    emitter.emit(vertex.id(), (Double) pageRank.value());
  }
}

代码示例来源：origin: apache/tinkerpop

@Override
public void map(final Vertex vertex, final MapEmitter<NullObject, Serializable> emitter) {
  final Property<Serializable> cluster = vertex.property(PeerPressureVertexProgram.CLUSTER);
  if (cluster.isPresent()) {
    emitter.emit(NullObject.instance(), cluster.value());
  }
}

代码示例来源：origin: apache/tinkerpop

public static void validatePropertyEquality(final Property originalProperty, final Property otherProperty) {
  assertEquals(originalProperty, otherProperty);
  assertEquals(otherProperty, originalProperty);
  if (originalProperty.isPresent()) {
    assertEquals(originalProperty.key(), otherProperty.key());
    assertEquals(originalProperty.value(), otherProperty.value());
    assertEquals(originalProperty.element(), otherProperty.element());
  }
}