OrientDB API

public static void main(String[] args) {
    	//使用原生JDK保存一个“人”顶点到图数据库
        People people1 = new People("张三", "男", 18);
        try (ODatabaseSession session = OrientSessionFactory
                .getInstance()
                .getSession()) {
            //在图数据库创建Class:People
            if (session.getClass("People") == null) {
                session.createVertexClass("People");
            }
            OVertex vertex = session.newInstance();
            vertex.setProperty("name", people1.getName());
            vertex.setProperty("age", people1.getAge());
            vertex.save();
        }
}

public static void main(String[] args) {
    	//创建实体对象
        People people2 = new People("李四", "男", 21);
    	//将实体对象包装成ResourceNode对象，其提供了对顶点的操作，对边的操作在ResourceRelation里
    	ResourceNode<People> li = new GraphResourceNode<>(people2);
    	//直接调用save方法进行保存
    	li.save();
}

@Getter
@Setter
@ToString
//实现Vertex语义接口，表明该实体是一个图数据库的顶点对象
public class People implements Vertex {

    private String name;

    private String sex;

    private Integer age;

    public People(String name, String sex, Integer age) {
        this.name = name;
        this.sex = sex;
        this.age = age;
    }

    public People() {
    }
}

 public static void main(String[] args) {
        try (ODatabaseSession session = OrientSessionFactory
                .getInstance()
                .getSession()) {
            OResultSet resultSet = session.query("select * from People where name = ?", "李四");
            People people=new People();
            while(resultSet.hasNext()){
                OResult result= resultSet.next();
                people.setName(result.getProperty("name"));
                people.setAge(result.getProperty("age"));
            }
            resultSet.close();
        }
 }

public static void main(String[] args) {
    	//创建资源图对象，其提供了很多对图的直接操作。使用OrientDB存储库（后续可以拓展Neo4j等存储库）
        ResourceGraph graph = new ResourceGraph(new OrientDBRepository());
    	//调用extractNode方法取出指定节点
        ResourceNode<People> peopleResourceNode = graph.extractNode(QueryParamsBuilder
                .newInstance()
                .addParams("name", "李四")
                .getParams());
    	//获取节点对应的属性实体
        People people = peopleResourceNode.getSource();
}

public static void main(String[] args) {
        try (ODatabaseSession session = OrientSessionFactory
                .getInstance()
                .getSession()) {
            //从顶点#74:0出发，深度优先遍历7层以内的同学，并且进行分页
            OResultSet resultSet = session.query("select * from (traverse * from #74:0 MAXDEPTH 7 STRATEGY DEPTH_FIRST) where (@class = \"Classmate\") skip 0 limit 10");
            List<ClassMates> classMates=new ArrayList<>();
            while(resultSet.hasNext()){
                ClassMates classMate=new ClassMates(null);
                OResult result= resultSet.next();
                classMate.setDate(result.getProperty("date"));
                //...
                classMates.add(classMate);
            }
            resultSet.close();
        }
}

public static void main(String[] args) {
    	  //创建资源图对象，其提供了很多对图的直接操作。使用OrientDB存储库（后续可以拓展Neo4j等存储库）
           ResourceGraph graph = new ResourceGraph(new OrientDBRepository());
    	   //直接调用traverse方法，参数分别是，出发节点、深度、遍历策略、分页配置、目标实体类型
           PagedResult<ResourceNode<? extends Vertex>> result = graph.traverse(graph.extractNode("#74:0"),
                QueryParamsBuilder
                .newInstance()
                .getParams(), 7, TraverseStrategy.DEPTH_FIRST, new PageConfig(1, 10, true), ClassMates.class);
        
        result
                .getSources()
                .forEach(item -> System.out.println(item.getSource()));
}