Java Code Examples for org.apache.tinkerpop.gremlin.structure.Property#empty()

@Override
public <V> Property<V> property(final String key, final V value) {
    ElementHelper.validateProperty(key, value);
    
    if (null == value) {
        properties(key).forEachRemaining(Property::remove);
        return Property.empty();
    }

    this.graph.tx().readWrite();
    try {
        this.baseElement.setProperty(key, value);
        return new Neo4jProperty<>(this, key, value);
    } catch (final IllegalArgumentException e) {
        throw Property.Exceptions.dataTypeOfPropertyValueNotSupported(value, e);
    }
}
 

@Override
public <V> Property<V> property(final String key, final V value) {
    if (this.removed) throw elementAlreadyRemoved(Edge.class, id);
    ElementHelper.validateProperty(key, value);

    if (!allowNullPropertyValues && null == value) {
        properties(key).forEachRemaining(Property::remove);
        return Property.empty();
    }

    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;

}
 

@Override
protected <V> Property<V> specificProperty(String key) {
    // note: use the statically defined strings to take advantage of `==` (pointer comparison) over `.equals` (String content comparison) for performance 
    if (WEIGHT.equals(key) && weight != null) {
        return new TinkerProperty(this, key, weight);
    } else {
        return Property.empty();
    }
}
 

@Override
public <V> Property<V> property(final String key) {
    this.graph.tx().readWrite();
    if (this.baseElement.hasProperty(key))
        return new Neo4jProperty<>(this, key, (V) this.baseElement.getProperty(key));
    else
        return Property.empty();
}
 

/**
 * {@inheritDoc}
 */
@Override
@SuppressWarnings("unchecked")
public <V> Property<V> property(String key) {
    Objects.requireNonNull(key, "key cannot be null");
    // property value
    Neo4JEdgeProperty propertyValue = properties.get(key);
    if (propertyValue != null)
        return (Property<V>)propertyValue;
    // empty property
    return Property.empty();
}
 

@Override
public <T> Property<T> property(String key) {
    T value = value(key);
    if (value == null) {
        return Property.<T>empty();
    } else {
        return new BitsyProperty<T>(this, key, value);
    }
}
 

@Override
protected <V> Property<V> specificProperty(String key) {
    // note: use the statically defined strings to take advantage of `==` (pointer comparison) over `.equals` (String content comparison) for performance
    if (LONG_PROPERTY.equals(key) && longProperty != null) {
        return new TinkerProperty(this, key, longProperty);
    } else {
        return Property.empty();
    }
}
 

@Override
public <V> Property<V> property(final String key) {
    V value = getProperty(key);
    return value != null ? new HBaseProperty<>(graph, this, key, value) : Property.empty();
}
 

@Override
public <U> Property<U> property(String key) {
    return Property.<U>empty();
}
 

@Override
public <U> Property<U> property(String key, U value) {
    return Property.<U>empty();
}
 

@Override
public <V> Property<V> property(final String key) {
    return null != this.properties && this.properties.containsKey(key) ? this.properties.get(key).get(0) : Property.empty();
}
 

@Override
public <U> Property<U> property(String key) {
    return Property.<U>empty();
}
 

@Override
public <U> Property<U> property(String key, U value) {
    return Property.<U>empty();
}
 

@Override
protected <V> Property<V> specificProperty(String key) {
    return Property.empty();
}
 

@Override
public <V> Property<V> property(final String key) {
    return null == this.properties ? Property.<V>empty() : this.properties.getOrDefault(key, Property.<V>empty());
}
 

@Override
public <U> Property<U> property(final String key) {
    return null == this.properties ? Property.<U>empty() : this.properties.getOrDefault(key, Property.<U>empty());
}
 

@Override
protected <V> Property<V> specificProperty(String key) {
    return Property.empty();
}
 

@Override
public <U> Property<U> property(final String key) {
    return null == this.properties ? Property.<U>empty() : this.properties.getOrDefault(key, Property.<U>empty());
}