DataItem

使用Response的get()、alias()方法时将获得DataItem类。

DataItem的方法：

也可以使用方法asTable()将默认别名_graph、_nodeSchema、_edgeSchema等的DataItem转为Table。

Node

Node类的字段：

Node类的方法：

示例：发送嬴图GQL语句查询一列点，获取第二个点的ID，同时将第一个点的rating改为8并输出

public class Main {
    public static void main(String[] args) {
        // 创建名为 conn 的连接，此部分代码省略

        Response res = conn.uql("find().nodes({@movie}) as nodes return nodes{*} limit 5");
        List<Node> nodeList = res.alias("nodes").asNodes();
        Node firstNode = res.alias("nodes").asFirstNode();
        System.out.println("ID of 2nd node is: " + nodeList.get(1).getID());
        System.out.println("rating of 1st node was: " + firstNode.get("rating"));
        firstNode.set("rating",8);
        System.out.println("rating of 1st node now is: " + firstNode.get("rating"));
    }
}

输出：

ID of 2nd node is: ULTIPA80000000000003EA
rating of 1st node was: 9
rating of 1st node now is: 8

Edge

Edge类的字段：

Edge类的方法：

示例：发送嬴图GQL语句查询一列边，获取第二个边的起点的ID，为第一个边添加属性time并设置为2022-04-13 09:23:24后再将该边输出

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("find().edges({@default}) as edges return edges{*} limit 5");
        List<Edge> edgeList = res.alias("edges").asEdges();
        Edge firstEdge = res.alias("edges").asFirstEdge();
        System.out.println("ID of start node of 2nd edge is: " + edgeList.get(1).getFrom());
        System.out.println("time of 1st edge was: " + firstEdge.get("time"));
        firstEdge.set("time",Timestamp.valueOf("2022-04-13 09:23:24"));
        System.out.println("time of 1st edge now is: " + firstEdge.get("time"));
    }
}

输出：

ID of start node of 2nd edge is: ULTIPA8000000000000001
time of 1st node was: null
time of 1st node now is: 2022-04-13 09:23:24.0

Path

Path类的字段：

Path类的方法：

示例：发送嬴图GQL语句查询一列路径，获取第一个路径的第二个点

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("n().e()[2].n() as paths return paths{*} limit 3");
        List<Path> pathList = res.alias("paths").asPaths();
        System.out.println("the 2nd node in the 1st path: " + pathList.get(0).getNodes().get(1).toJson());
    }
}

输出：

the 2nd node in the 1st path: {"name":"Meng","industry":"Construction","gender":"female","year":1982,"_uuid":20,"_id":"ULTIPA8000000000000014","schema":"account"}

Graph

Graph类的字段：

Graph类的方法：

示例：发送嬴图GQL语句查询图集列表，获取第三个图集的名称

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("show().graph()");
        List<Graph> graphList = res.alias("_graph").asGraphs();
        System.out.println("name of 3rd graph is: " + graphList.get(2).getName());
    }
}

输出：

name of 3rd graph is: miniCircle

Schema

Schema类的字段：

Schema类的方法：

示例：发送嬴图GQL语句查询当前图集的点schema列表，获取第三个点schema的点的数量

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("show().node_schema()");
        List<Schema> schemaList = res.alias("_nodeSchema").asSchemas();
        System.out.println("3rd node schema is: " + schemaList.get(2).toString());
        System.out.println("number of nodes of 3rd node schema is: " + schemaList.get(2).getTotal());
    }
}

输出：

3rd node schema is: Schema(name=country, description=, properties=[Property(name=name, propertyType=null, type=string, lte=false, schema=null, description=, ignored=false)], dbType=DBNODE, total=23)
number of nodes of 3rd node schema is: 23

Property

Property类的字段：

Property类的方法：

示例：发送嬴图GQL语句查询当前图集的点属性列表，获取第三个点属性的LTE信息

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("show().node_property()");
        List<Property> propertyList = res.alias("_nodeProperty").asProperties();
        System.out.println("3rd node property is: " + propertyList.get(2).toString());
        System.out.println("lte of 3rd node property is: " + propertyList.get(2).getLte());
    }
}

输出：

3rd node property is: Property(name=timestamp, propertyType=TIMESTAMP, type=timestamp, lte=false, schema=movie, description=, ignored=false)
lte of 3rd node property is: false

Algo

Algo 类的字段：

Algo 类的方法：

示例：发送嬴图GQL语句查询已安装的算法列表，获取第三个算法的名称及版本

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("show().algo()");
        List<Algo> algoList = res.alias("_algoList").asAlgos();
        System.out.println("3rd algorithm is: " + algoList.get(2).toString());
        System.out.println("name of 3rd algorithm is: " + algoList.get(2).getName());
        System.out.println("version of 3rd algorithm is: " + algoList.get(2).getVersion());
    }
}

输出：

3rd algorithm is: Algo(name=random_walk_struc2vec, desc={"name":"struc2vec walk","description":"struc2vec walk to generate the sample data for next-step training","version":"1.0.1","parameters":{"walk_length":"size_t,required","walk_num":"size_t,required","k":"size_t,required","stay_probability":"float,required","ids":"nodes","limit":"optional,-1 for all results, >=0 partial results"},"write_to_file_parameters":{"filename":"set file name"},"result_opt":"25"}, version=null, params=null)
name of 3rd algorithm is: random_walk_struc2vec
version of 3rd algorithm is: null

Table

Table类的字段：

Table 类的方法：

示例：发送嬴图GQL语句查询一个表格，获取该表格的第二行数据

public class Main {
    public static void main(String[] args) {
        // 创建名为 conn 的连接，此部分代码省略

        Response res = conn.uql("find().nodes({@account}) limit 5 return table(nodes.gender, nodes.year) as myTable");
        Table table = res.alias("myTable").asTable();
        System.out.println("2nd row is: " + table.getRows().get(1));
    }
}

输出：

2nd row is: [female, 1989]

UqlArray

UqlArray类继承于二维集合ArrayList<List<Object>> 。

示例：发送嬴图GQL语句查询一列数组，获取第二个数组的第三个元素

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("find().nodes({@account}) as nodes group by nodes.industry return collect(nodes.name) as myArray limit 3");
        UqlArray array = res.alias("myArray").asArray();
        System.out.println("2nd array is: " + array.get(1));
        System.out.println("3rd element of 2nd array is: " + array.get(1).get(2));
    }
}

输出：

2nd array is: [Meng, HolyC, pixiedust, sadmov]
3rd element of 2nd array is: pixiedust

Attr

Attr类的字段：

Attr类的方法：

示例：发送嬴图GQL语句查询一列属性，获取第二个属性

public class Main {
    public static void main(String[] args) {
        // 创建名为conn的连接，此部分代码省略

        Response res = conn.uql("find().nodes({@account}) as nodes return nodes.industry as myAttr limit 5");
        Attr attr = res.alias("myAttr").asAttr();
        System.out.println("all attrs are: " + attr.getValues());
        System.out.println("2nd attr is: " + attr.getValues().get(1));
    }
}

输出：

all attrs are: [Manufacturing, Health, Other, Education, Publishing]
2nd attr is: Health