Element

All Known Subinterfaces:

Edge, Vertex
```
public interface Element
```
图元素

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Map<String,Object>`	`getProperties()`	返回属性集合
`default Object`	`getProperty(String propertyName)`	获取某个属性值
`int`	`getTypeIndex()`	获取类型index
`long`	`getVersion()`	获取 version
`default boolean`	`hasProperty(String propertyName)`	判断属性是否存在

- Method Detail
  - getVersion
```
long getVersion()
```
    获取 version
    
    Returns:
    
    version
  - getTypeIndex
```
int getTypeIndex()
```
    获取类型index
    
    Returns:
    
    类型index
  - hasProperty
```
default boolean hasProperty(String propertyName)
```
    判断属性是否存在
    
    Parameters:
    
    propertyName - 属性名
    
    Returns:
    
    true存在，false不存在
  - getProperty
```
default Object getProperty(String propertyName)
```
    获取某个属性值
    
    Parameters:
    
    propertyName - 属性名
    
    Returns:
    
    属性值
  - getProperties
```
Map<String,Object> getProperties()
```
    返回属性集合
    
    Returns:
    
    {属性名，属性值}