Index (Tentackle Data Model 11.7.4.1 API)

All Superinterfaces:

ModelElement

All Known Implementing Classes:

IndexImpl
```
public interface Index
extends ModelElement
```
Describes a database index.

Author:

harald

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`createDatabaseIndexName(Entity entity)`	Creates the database index name for given entity.
`List<IndexAttribute>`	`getAttributes()`	Gets the index attributes.
`String`	`getComment()`	Gets the comment.
`Entity`	`getEntity()`	Gets the entity this index belongs to.
`String`	`getFilterCondition()`	Gets the optional filter condition.
`boolean`	`isUnique()`	Returns whether the index is unique.
`String`	`sqlCreateIndex(Backend backend, Entity entity)`	Creates the index creation sql code.
`void`	`validate()`	Validates the index.

Methods inherited from interface org.tentackle.model.ModelElement
getName, getOrdinal, getParent, getSourceInfo

- Method Detail
  - getEntity
```
Entity getEntity()
```
    Gets the entity this index belongs to.
    
    Returns:
    
    the entity
  - createDatabaseIndexName
```
String createDatabaseIndexName(Entity entity)
```
    Creates the database index name for given entity.
    
    Parameters:
    
    entity - the entity
    
    Returns:
    
    the effective sql name
  - getComment
```
String getComment()
```
    Gets the comment.
    
    Returns:
    
    the comment
  - isUnique
```
boolean isUnique()
```
    Returns whether the index is unique.
    
    Returns:
    
    true if unique, else non-unique
  - getFilterCondition
```
String getFilterCondition()
```
    Gets the optional filter condition.
    
    Returns:
    
    the condition, null if none
  - getAttributes
```
List<IndexAttribute> getAttributes()
```
    Gets the index attributes.
    
    Returns:
    
    the attributes
  - validate
```
void validate()
       throws ModelException
```
    Validates the index.
    
    Throws:
    
    ModelException - if validation failed
  - sqlCreateIndex
```
String sqlCreateIndex(Backend backend,
                      Entity entity)
```
    Creates the index creation sql code.
    
    Parameters:
    
    backend - the backend to create sql code for
    
    entity - the entity to create the index for
    
    Returns:
    
    the SQL code