PortableIdMapper (Ignite 1.4.0)

```
public interface PortableIdMapper
```
Type and field ID mapper for portable objects. Ignite never writes full strings for field or type names. Instead, for performance reasons, Ignite writes integer hash codes for type and field names. It has been tested that hash code conflicts for the type names or the field names within the same type are virtually non-existent and, to gain performance, it is safe to work with hash codes. For the cases when hash codes for different types or fields actually do collide PortableIdMapper allows to override the automatically generated hash code IDs for the type and field names.
Portable ID mapper can be configured for all portable objects via PortableMarshaller.getIdMapper() method, or for a specific portable type via PortableTypeConfiguration.getIdMapper() method.

Methods
Modifier and Type	Method and Description
`int`	`fieldId(int typeId, String fieldName)` Gets ID for provided field.
`int`	`typeId(String clsName)` Gets type ID for provided class name.

Interface PortableIdMapper