Java VertexProperty.Cardinality方法代码示例

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
/**
 * This is a helper method for dealing with vertex property cardinality and typically used in {@link Vertex#property(org.apache.tinkerpop.gremlin.structure.VertexProperty.Cardinality, String, Object, Object...)}.
 * If the cardinality is list, simply return {@link Optional#empty}.
 * If the cardinality is single, delete all existing properties of the provided key and return {@link Optional#empty}.
 * If the cardinality is set, find one that has the same key/value and attached the properties to it and return it. Else, if no equal value is found, return {@link Optional#empty}.
 *
 * @param vertex      the vertex to stage a vertex property for
 * @param cardinality the cardinality of the vertex property
 * @param key         the key of the vertex property
 * @param value       the value of the vertex property
 * @param keyValues   the properties of vertex property
 * @param <V>         the type of the vertex property value
 * @return a vertex property if it has been found in set with equal value
 */
public static <V> Optional<VertexProperty<V>> stageVertexProperty(final Vertex vertex, final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    if (cardinality.equals(VertexProperty.Cardinality.single))
        vertex.properties(key).forEachRemaining(VertexProperty::remove);
    else if (cardinality.equals(VertexProperty.Cardinality.set)) {
        final Iterator<VertexProperty<V>> itty = vertex.properties(key);
        while (itty.hasNext()) {
            final VertexProperty<V> property = itty.next();
            if (property.value().equals(value)) {
                ElementHelper.attachProperties(property, keyValues);
                return Optional.of(property);
            }
        }
    } // do nothing on Cardinality.list
    return Optional.empty();
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
	if (cardinality != Cardinality.single) {
		// For some reason, TP3 tests fail with this exception
		//throw new BitsyException(BitsyErrorCodes.NO_MULTI_PROPERTY_SUPPORT, "Encountered cardinality: " + cardinality.toString());
	} else if (keyValues.length != 0) {
		throw new UnsupportedOperationException("Encountered key values: " + keyValues.toString(), new BitsyException(BitsyErrorCodes.NO_META_PROPERTY_SUPPORT));
	}

	return property(key, value);
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    ElementHelper.validateProperty(key, value);
    if (ElementHelper.getIdValue(keyValues).isPresent())
        throw Vertex.Exceptions.userSuppliedIdsNotSupported();
    this.graph.tx().readWrite();
    return this.graph.trait.setVertexProperty(this, cardinality, key, value, keyValues);
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
/**
 * Assign key/value pairs as properties to a {@link org.apache.tinkerpop.gremlin.structure.Vertex}.
 * If the value of {@link T#id} or {@link T#label} is in the set of pairs, then they are ignored.
 *
 * @param vertex            the vertex to attach the properties to
 * @param cardinality       the cardinality of the key value pair settings
 * @param propertyKeyValues the key/value pairs to assign to the {@code element}
 * @throws ClassCastException       if the value of the key is not a {@link String}
 * @throws IllegalArgumentException if the value of {@code element} is null
 */
public static void attachProperties(final Vertex vertex, final VertexProperty.Cardinality cardinality, final Object... propertyKeyValues) {

    if (null == vertex) {
        throw Graph.Exceptions.argumentCanNotBeNull("vertex");
    }
    //System.out.println("property number="+propertyKeyValues.length);
    for (int i = 0; i < propertyKeyValues.length; i = i + 2) {
        if (!propertyKeyValues[i].equals(T.id) && !propertyKeyValues[i].equals(T.label)) {
            //System.out.println("cardinality="+cardinality+"\tkey="+propertyKeyValues[i]+"\tvalue="+propertyKeyValues[i+1]);
            vertex.property(cardinality, (String) propertyKeyValues[i], propertyKeyValues[i + 1]);
        }
    }
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
public AddPropertyStep(final Traversal.Admin traversal, final VertexProperty.Cardinality cardinality, final Object keyObject, final Object valueObject) {
    super(traversal);
    this.parameters.set(T.key, keyObject);
    this.parameters.set(T.value, valueObject);
    this.cardinality = cardinality;
    this.parameters.integrateTraversals(this);
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    if (state.equals(State.MAP_REDUCE))
        throw GraphComputer.Exceptions.vertexPropertiesCanNotBeUpdatedInMapReduce();
    if (!computeKeys.contains(key))
        throw GraphComputer.Exceptions.providedKeyIsNotAnElementComputeKey(key);
    return new ComputerVertexProperty<>(this.getBaseVertex().property(cardinality, key, value, keyValues));
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> setVertexProperty(final Neo4jVertex vertex, final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    if (cardinality != VertexProperty.Cardinality.single)
        throw VertexProperty.Exceptions.multiPropertiesNotSupported();
    if (keyValues.length > 0)
        throw VertexProperty.Exceptions.metaPropertiesNotSupported();
    try {
        vertex.getBaseVertex().setProperty(key, value);
        return new Neo4jVertexProperty<>(vertex, key, value);
    } catch (final IllegalArgumentException iae) {
        throw Property.Exceptions.dataTypeOfPropertyValueNotSupported(value, iae);
    }
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public VertexProperty.Cardinality getCardinality(final String key) {
    return defaultVertexPropertyCardinality;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public VertexProperty.Cardinality getCardinality(final String key) {
    return VertexProperty.Cardinality.single;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    throw Element.Exceptions.propertyAdditionNotSupported();
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final VertexProperty.Cardinality cardinality, final String key, final V value, final Object... keyValues) {
    throw GraphComputer.Exceptions.adjacentVertexPropertiesCanNotBeReadOrUpdated();
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public VertexProperty.Cardinality getCardinality(final String key) {
    // probably not much hurt here in returning list...it's an "empty graph"
    return VertexProperty.Cardinality.list;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public VertexProperty.Cardinality getCardinality(final String key) {
    return trait.getCardinality(key);
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public VertexProperty.Cardinality getCardinality(final String key) {
    return VertexProperty.Cardinality.list;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
/**
 * Sets a {@link Property} value and related meta properties if supplied, if supported by the {@link Graph}
 * and if the {@link Element} is a {@link VertexProperty}.  This method is the long-hand version of
 * {@link #property(Object, Object, Object...)} with the difference that the
 * {@link org.apache.tinkerpop.gremlin.structure.VertexProperty.Cardinality} can be supplied.
 * <p/>
 * Generally speaking, this method will append an {@link AddPropertyStep} to the {@link Traversal} but when
 * possible, this method will attempt to fold key/value pairs into an {@link AddVertexStep}, {@link AddEdgeStep} or
 * {@link AddVertexStartStep}.  This potential optimization can only happen if cardinality is not supplied
 * and when meta-properties are not included.
 *
 * @param cardinality the specified cardinality of the property where {@code null} will allow the {@link Graph}
 *                    to use its default settings
 * @param key         the key for the property
 * @param value       the value for the property
 * @param keyValues   any meta properties to be assigned to this property
 */
public default GraphTraversal<S, E> property(final VertexProperty.Cardinality cardinality, final Object key, final Object value, final Object... keyValues) {
    // if it can be detected that this call to property() is related to an addV/E() then we can attempt to fold
    // the properties into that step to gain an optimization for those graphs that support such capabilities.
    if ((this.asAdmin().getEndStep() instanceof AddVertexStep || this.asAdmin().getEndStep() instanceof AddEdgeStep
            || this.asAdmin().getEndStep() instanceof AddVertexStartStep) && keyValues.length == 0 && null == cardinality) {
        ((Mutating) this.asAdmin().getEndStep()).addPropertyMutations(key, value);
    } else {
        this.asAdmin().addStep(new AddPropertyStep(this.asAdmin(), cardinality, key, value));
        ((AddPropertyStep) this.asAdmin().getEndStep()).addPropertyMutations(keyValues);
    }
    return this;
}