```
final class VertexDescriptionHash
extends java.lang.Object
```
A hash object singleton that stores all VertexDescription instances via WeakReference. The purpose of the class is to keep track of created VertexDescription instances to prevent duplicates.

Fields
Modifier and Type	Field	Description
`private static VertexDescriptionHash`	`INSTANCE`
`(package private) java.util.HashMap<java.lang.Integer,VertexDescription>`	`m_map`
`private static VertexDescription`	`m_vd2D`
`private static VertexDescription`	`m_vd3D`

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`VertexDescription`	`FindOrAdd(int bitSet)`
`static VertexDescriptionHash`	`getInstance()`
`VertexDescription`	`getVD2D()`
`VertexDescription`	`getVD3D()`

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

java.util.HashMap<java.lang.Integer,VertexDescription> m_map

private static VertexDescription m_vd2D

private static VertexDescription m_vd3D

private static final VertexDescriptionHash INSTANCE

Constructor Detail
- VertexDescriptionHash
```
private VertexDescriptionHash()
```

public static VertexDescriptionHash getInstance()

public final VertexDescription getVD2D()

public final VertexDescription getVD3D()

public final VertexDescription FindOrAdd(int bitSet)

Class VertexDescriptionHash