Node JS version

node_modules/cassandra-driver/lib/datastax/graph/structure.js

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+/*
+ * Copyright DataStax, Inc.
+ *
+ * Licensed 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.
+ */
+
+'use strict';
+
+const util = require('util');
+
+/**
+ * @classdesc
+ * Represents a graph Element.
+ * @param id
+ * @param label
+ * @abstract
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function Element(id, label) {
+  /**
+   * Gets the element id.
+   */
+  this.id = id;
+  /**
+   * Gets the element label.
+   * @type {String}
+   */
+  this.label = label;
+}
+
+/**
+ * @classdesc
+ * Represents a graph Vertex.
+ * @param id
+ * @param {String} label
+ * @param {Object<string, Array>} properties
+ * @extends {Element}
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function Vertex(id, label, properties) {
+  Element.call(this, id, label);
+  /**
+   * Gets the vertex properties.
+   * @type {Object<string, Array>}
+   */
+  this.properties = properties;
+}
+
+util.inherits(Vertex, Element);
+
+/**
+ * @classdesc
+ * Represents a graph Edge.
+ * @param id
+ * @param outV
+ * @param {outVLabel} outVLabel
+ * @param {String} label
+ * @param inV
+ * @param {String} inVLabel
+ * @param {Object<string, Property>} properties
+ * @extends {Element}
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function Edge(id, outV, outVLabel, label, inV, inVLabel, properties) {
+  Element.call(this, id, label);
+  /**
+   * Gets the id of outgoing vertex of the edge.
+   */
+  this.outV = outV;
+  /**
+   * Gets the label of the outgoing vertex.
+   */
+  this.outVLabel = outVLabel;
+  /**
+   * Gets the id of the incoming vertex of the edge.
+   */
+  this.inV = inV;
+
+  /**
+   * Gets the label of the incoming vertex.
+   */
+  this.inVLabel = inVLabel;
+  /**
+   * Gets the properties of the edge as an associative array.
+   * @type {Object}
+   */
+  this.properties = {};
+  (function adaptProperties(self) {
+    if (properties) {
+      const keys = Object.keys(properties);
+      for (let i = 0; i < keys.length; i++) {
+        const k = keys[i];
+        self.properties[k] = properties[k].value;
+      }
+    }
+  })(this);
+}
+
+util.inherits(Edge, Element);
+
+/**
+ * @classdesc
+ * Represents a graph vertex property.
+ * @param id
+ * @param {String} label
+ * @param value
+ * @param {Object} properties
+ * @extends {Element}
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function VertexProperty(id, label, value, properties) {
+  Element.call(this, id, label);
+  this.value = value;
+  this.key = this.label;
+  this.properties = properties;
+}
+
+util.inherits(VertexProperty, Element);
+
+/**
+ * @classdesc
+ * Represents a property.
+ * @param key
+ * @param value
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function Property(key, value) {
+  this.key = key;
+  this.value = value;
+}
+
+/**
+ * @classdesc
+ * Represents a walk through a graph as defined by a traversal.
+ * @param {Array} labels
+ * @param {Array} objects
+ * @memberOf module:datastax/graph
+ * @constructor
+ */
+function Path(labels, objects) {
+  this.labels = labels;
+  this.objects = objects;
+}
+
+module.exports = {
+  Edge,
+  Element,
+  Path,
+  Property,
+  Vertex,
+  VertexProperty
+};