/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tinkerpop.gremlin.structure.util.detached;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Property;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.VertexProperty;
import org.apache.tinkerpop.gremlin.structure.util.ElementHelper;
import org.apache.tinkerpop.gremlin.structure.util.Host;
import org.apache.tinkerpop.gremlin.structure.util.StringFactory;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
public class DetachedVertexProperty<V> extends DetachedElement<VertexProperty<V>> implements VertexProperty<V> {
protected V value;
protected transient DetachedVertex vertex;
private DetachedVertexProperty() {
}
protected DetachedVertexProperty(final VertexProperty<V> vertexProperty, final boolean withProperties) {
super(vertexProperty);
this.value = vertexProperty.value();
this.vertex = DetachedFactory.detach(vertexProperty.element(), false);
// only serialize properties if requested, the graph supports it and there are meta properties present.
// this prevents unnecessary object creation of a new HashMap which will just be empty. it will use
// Collections.emptyMap() by default
if (withProperties && vertexProperty.graph().features().vertex().supportsMetaProperties()) {
final Iterator<Property<Object>> propertyIterator = vertexProperty.properties();
if (propertyIterator.hasNext()) {
this.properties = new HashMap<>();
propertyIterator.forEachRemaining(property -> this.properties.put(property.key(), Collections.singletonList(DetachedFactory.detach(property))));
}
}
}
public DetachedVertexProperty(final Object id, final String label, final V value,
final Map<String, Object> properties,
final Vertex vertex) {
super(id, label);
this.value = value;
this.vertex = DetachedFactory.detach(vertex, true);
if (null != properties && !properties.isEmpty()) {
this.properties = new HashMap<>();
properties.entrySet().iterator().forEachRemaining(entry -> this.properties.put(entry.getKey(), Collections.singletonList(new DetachedProperty<>(entry.getKey(), entry.getValue(), this))));
}
}
/**
* This constructor is used by GraphSON when deserializing and the {@link Host} is not known.
*/
public DetachedVertexProperty(final Object id, final String label, final V value,
final Map<String, Object> properties) {
super(id, label);
this.value = value;
if (null != properties && !properties.isEmpty()) {
this.properties = new HashMap<>();
properties.entrySet().iterator().forEachRemaining(entry -> this.properties.put(entry.getKey(), Collections.singletonList(new DetachedProperty<>(entry.getKey(), entry.getValue(), this))));
}
}
@Override
public boolean isPresent() {
return true;
}
@Override
public String key() {
return this.label;
}
@Override
public V value() {
return this.value;
}
@Override
public Vertex element() {
return this.vertex;
}
@Override
public void remove() {
throw Property.Exceptions.propertyRemovalNotSupported();
}
@Override
public String toString() {
return StringFactory.propertyString(this);
}
@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
@Override
public boolean equals(final Object object) {
return ElementHelper.areEqual(this, object);
}
@Override
public <U> Iterator<Property<U>> properties(final String... propertyKeys) {
return (Iterator) super.properties(propertyKeys);
}
}