EntityHierarchyBuilder (Hibernate Javadocs)

java.lang.Object
- org.hibernate.boot.model.source.internal.hbm.EntityHierarchyBuilder

```
public class EntityHierarchyBuilder
extends Object
```
Helper for dealing with entity inheritance hierarchies in hbm.xml processing. In hbm.xml the super/sub may be split across documents. The purpose of this class is to:
1. validate that all hierarchies are complete (make sure a mapping does not reference an unknown entity as its super)
2. ultimately order the processing of every entity to make sure we process each hierarchy "downward" (from super to sub(s)).

Constructor Summary

Constructors
Constructor Description

EntityHierarchyBuilder()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`List<EntityHierarchySourceImpl>`	`buildHierarchies()`	To be called after all mapping documents have been processed (via `indexMappingDocument(org.hibernate.boot.model.source.internal.hbm.MappingDocument)`)
`void`	`indexMappingDocument(MappingDocument mappingDocument)`	Called for each mapping document.

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

- Constructor Detail
  - EntityHierarchyBuilder
```
public EntityHierarchyBuilder()
```
- Method Detail
  - buildHierarchies
```
public List<EntityHierarchySourceImpl> buildHierarchies()
                                                 throws HibernateException
```
    To be called after all mapping documents have been processed (via indexMappingDocument(org.hibernate.boot.model.source.internal.hbm.MappingDocument))
    
    Returns:
    
    The built hierarchies
    
    Throws:
    
    HibernateException - Indicates subclass mappings still waiting to be linked to their super types
  - indexMappingDocument
```
public void indexMappingDocument(MappingDocument mappingDocument)
```
    Called for each mapping document.
    
    Parameters:
    
    mappingDocument - The hbm.xml document to index