Java VertexProperty.isPresent方法代码示例

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
/**
 * {@inheritDoc}
 */
@Override
public VertexProperty getOrCreateVertexProperty(final VertexProperty<?> property, final Vertex vertex, final Graph graph, final GraphTraversalSource g) {
    final VertexProperty<?> vp;
    final VertexProperty<?> existing = vertex.property(property.key());
    if (!existing.isPresent()) {
        return createVertexProperty(property, vertex, graph, g);
    }
    if (!existing.value().equals(property.value())) {
        vp = vertex.property(property.key(), property.value());
    } else {
        vp = existing;
    }
    property.properties().forEachRemaining(metaProperty -> {
        final Property<?> existing2 = vp.property(metaProperty.key());
        if (!existing2.isPresent() || !existing2.value().equals(metaProperty.value())) {
            vp.property(metaProperty.key(), metaProperty.value());
        }
    });
    return vp;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> Iterator<VertexProperty<V>> properties(String... propertyKeys) {
       ArrayList<VertexProperty<V>> ans = new ArrayList<VertexProperty<V>>();

       if (propertyKeys.length == 0) {
       	if (this.properties == null) return Collections.emptyIterator();
       	propertyKeys = this.properties.getPropertyKeys();
       }

       for (String key : propertyKeys) {
       	VertexProperty<V> prop = property(key);
           if (prop.isPresent()) ans.add(prop);
       }
       return ans.iterator();
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
public static String getPropertyOrEmptyString(final Vertex vertex, final String propertyKey) {
    VertexProperty<String> property = vertex.property(propertyKey);
    if (property.isPresent()) {
        return property.value();
    }
    return "";
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
public static String getPropertyOrFail(final Vertex vertex, final String propertyKey) {
    VertexProperty<String> property = vertex.property(propertyKey);
    if (property.isPresent()) {
        return property.value();
    }
    throw new IllegalStateException(
            String.format("The vertex with id '%s' does not conatin the expected property '%s'.", vertex.id(),
                    propertyKey));
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
public static String getPropertyOrNull(final Vertex vertex, final String propertyKey) {
    VertexProperty<String> property = vertex.property(propertyKey);
    if (property.isPresent()) {
        return property.value();
    }
    return null;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public int compare(VertexProperty<T> left, VertexProperty<T> right) {
    if (!left.isPresent()) {
        return !right.isPresent() ? 0 : (presentFirst ? -1 : 1);
    } else if (!right.isPresent()) {
        return presentFirst ? 1 : -1;
    } else {
        return delegate != null ? delegate.compare(left.value(), right.value()) : 0;
    }
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Nullable
private static String computeNodeLabel(Vertex vertex) {
    if (vertex.label().equals(Bdio.Class.Project.name())
            || vertex.label().equals(Bdio.Class.Component.name())) {
        return vertex.<String> property(Bdio.DataProperty.name.name()).orElse(null);
    } else if (vertex.label().equals(Bdio.Class.File.name())) {
        VertexProperty<String> path = vertex.property(Bdio.DataProperty.path.name());
        return path.isPresent() ? HID.from(URI.create(path.value())).getName() : vertex.id().toString();
    } else {
        return null;
    }
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public <V> VertexProperty<V> property(final String key) {
    final VertexProperty<V> vertexProperty = getBaseVertex().<V>property(key);
    return vertexProperty.isPresent() ?
            new HadoopVertexProperty<>((VertexProperty<V>) ((Vertex) this.baseElement).property(key), this) :
            VertexProperty.<V>empty();
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
@Override
public void addStart(final Traverser.Admin<Vertex> start) {
    final VertexProperty<TraverserSet<Object>> property = start.get().<TraverserSet<Object>>property(TraversalVertexProgram.HALTED_TRAVERSERS);
    this.count = property.isPresent() ? property.value().bulkSize() : 0l;
}
 

import org.apache.tinkerpop.gremlin.structure.VertexProperty; //导入方法依赖的package包/类
/**
 * Returns an optional representing the value of the vertex property. While the vertex property itself has methods
 * like {@code orElse}, it lacks methods like {@code map}.
 */
public static <T> Optional<T> optionalValue(VertexProperty<T> vp) {
    return vp.isPresent() ? Optional.of(vp.value()) : Optional.empty();
}