GraphBinaryReader (Apache TinkerPop 3.7.1 API)

java.lang.Object
- org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader

```
public class GraphBinaryReader
extends Object
```
Reads a value from a buffer using the TypeSerializer instances configured in the TypeSerializerRegistry.
This class exposes two different methods to read a value from a buffer: read(Buffer) and readValue(Buffer, Class, boolean):
- read() method expects a value in fully-qualified format, composed of {type_code}{type_info}{value_flag}{value}.
- readValue() method expects a {value_flag}{value} when a value is nullable and only {value} when a value is not nullable.
The GraphBinaryReader should be used to read a nested known type from a TypeSerializer. For example, if a POINT type is composed by two doubles representing the position in the x and y axes, a TypeSerializer for POINT type should use the provided GraphBinaryReader instance to read those two double values. As x and y values are expected to be provided as non-nullable doubles, the method readValue() should be used: readValue(buffer, Double.class, false)

Constructor Summary

Constructors
Constructor Description

GraphBinaryReader()

GraphBinaryReader(TypeSerializerRegistry registry)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<T> T`	`read(Buffer buffer)`	Reads the type code, information and value of a given buffer with fully-qualified format.
`<T> T`	`readValue(Buffer buffer, Class<T> type, boolean nullable)`	Reads a value for an specific type.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GraphBinaryReader
```
public GraphBinaryReader()
```
  - GraphBinaryReader
```
public GraphBinaryReader(TypeSerializerRegistry registry)
```
- Method Detail
  - readValue
```
public <T> T readValue(Buffer buffer,
                       Class<T> type,
                       boolean nullable)
                throws IOException
```
    Reads a value for an specific type.
    When the value is nullable, the reader expects the {value_flag}{value} to be contained in the buffer.
    
    When the value is not nullable, the reader expects only the {value} to be contained in the buffer.
    
    Throws:
    
    IOException
  - read
```
public <T> T read(Buffer buffer)
           throws IOException
```
    Reads the type code, information and value of a given buffer with fully-qualified format.
    
    Throws:
    
    IOException