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Java API - OEdge

This class provides a standard interface for handling edges.

Managing Edges

When using OrientDB as a Graph database, this class represents an edge record. It extends the OElement class. Methods available to that class are also available to this class.

This class is available at com.orientechnologies.orient.core.record. To import it, use the following line where necessary:

import com.orientechnologies.orient.core.record.OEdge;

Once you've imported the class to your application, you can use it to build instances in your code.

For more information on vertices, see OVertex

Example

To create a new instance of this class, it is recommended that you use either the newInstance() or newEdge() methods on the ODatabaseDocument class interface. This allows you to operate on the given record and to easily save it back to the database when you're ready.

[TBD]

Methods

Once you've created or initialized an OEdge instance, you can begin to call methods on it to further define and read data from the edge. This method extends the OElement class. Methods available to that class are also available to this one.

For information on methods specific to this class, see the table below.

Saving Edges

When you create or retrieve an OEdge instance, you create a snapshot of the record. Any changes you make to the record remain in your application. In order to make these changes persistent on the database, you need to call the save() method on the element. For instance,

// GLOBAL VARIABLES
private ODatabaseDocument db;

// CREATE NEW RECORD
public void newEdge(OVertex toPerson, OVertex fromPerson){

   // Initialize Document
   OEdge relationship = db.newEdge("Relationship");
   relationship.setProperty("out", toPerson);
   relationship.setProperty("in", fromPerson);

   // Add Relationship to Database 
   relationship.save();
}