CaseWhenStarterBuilder (Blazebit Persistence Core API 1.1.0-Alpha4 API)

Type Parameters:
T - The builder type that is returned on terminal operations

All Known Subinterfaces:

CaseWhenBuilder<T>
```
public interface CaseWhenStarterBuilder<T>
```
A builder for general case when expressions.

Since:

1.0

Author:

Christian Beikov

Method Summary

Methods
Modifier and Type	Method and Description
`RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>>`	`when(String expression)` Starts a `RestrictionBuilder` to create a when predicate where expression will be on the left hand side of the predicate.
`CaseWhenAndThenBuilder<CaseWhenBuilder<T>>`	`whenAnd()` Starts a `CaseWhenAndThenBuilder` which is a predicate consisting only of conjunctive connected predicates.
`SubqueryInitiator<CaseWhenThenBuilder<CaseWhenBuilder<T>>>`	`whenExists()` Starts an exists predicate for the when clause with a subquery on the right hand side.
`SubqueryInitiator<CaseWhenThenBuilder<CaseWhenBuilder<T>>>`	`whenNotExists()` Starts an exists predicate for the when clause with a subquery on the right hand side.
`CaseWhenOrThenBuilder<CaseWhenBuilder<T>>`	`whenOr()` Starts a `CaseWhenOrThenBuilder` which is a predicate consisting only of disjunctiv connected predicates.
`SubqueryInitiator<RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>>>`	`whenSubquery()` Starts a `SubqueryInitiator` for the left hand side of a when predicate.
`SubqueryInitiator<RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>>>`	`whenSubquery(String subqueryAlias, String expression)` Starts a `SubqueryInitiator` for the left hand side of a when predicate.

- Method Detail
  - when
```
RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>> when(String expression)
```
    Starts a RestrictionBuilder to create a when predicate where expression will be on the left hand side of the predicate.
    
    Parameters:
    expression - The left hand expression for a when predicate
    
    Returns:
    The restriction builder for the given expression
  - whenSubquery
```
SubqueryInitiator<RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>>> whenSubquery()
```
    Starts a SubqueryInitiator for the left hand side of a when predicate. When the subquery builder and the restriction builder for the right hand side are finished, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Returns:
    The subquery initiator for building a subquery
  - whenSubquery
```
SubqueryInitiator<RestrictionBuilder<CaseWhenThenBuilder<CaseWhenBuilder<T>>>> whenSubquery(String subqueryAlias,
                                                                                          String expression)
```
    Starts a SubqueryInitiator for the left hand side of a when predicate. All occurrences of subqueryAlias in expression will be replaced by the subquery. This allows to build expressions containing subqueries like following example shows:
    whenSubquery("x", "x * 2 + 1").from(Person.class, "p").select("COUNT(p)").end();
    
    results in:
    
    (SELECT COUNT(p) FROM Person p) * 2 + 1
    
    When the subquery builder and the restriction builder for the right hand side are finished, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Parameters:
    subqueryAlias - The alias for the subquery which will be replaced by the actual subquery
    expression - The expression which will be used as left hand side of a predicate. This expression contains the subqueryAlias to define the insertion points for the subquery.
    
    Returns:
    The subquery initiator for building a subquery
  - whenExists
```
SubqueryInitiator<CaseWhenThenBuilder<CaseWhenBuilder<T>>> whenExists()
```
    Starts an exists predicate for the when clause with a subquery on the right hand side. When the builder finishes, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Returns:
    The subquery initiator for building a subquery
  - whenNotExists
```
SubqueryInitiator<CaseWhenThenBuilder<CaseWhenBuilder<T>>> whenNotExists()
```
    Starts an exists predicate for the when clause with a subquery on the right hand side. When the builder finishes, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Returns:
    The subquery initiator for building a subquery
  - whenAnd
```
CaseWhenAndThenBuilder<CaseWhenBuilder<T>> whenAnd()
```
    Starts a CaseWhenAndThenBuilder which is a predicate consisting only of conjunctive connected predicates. When the builder finishes, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Returns:
    The and predicate builder for the when expression
  - whenOr
```
CaseWhenOrThenBuilder<CaseWhenBuilder<T>> whenOr()
```
    Starts a CaseWhenOrThenBuilder which is a predicate consisting only of disjunctiv connected predicates. When the builder finishes, the when predicate in conjunction with it's then expression are added to the case when builder.
    
    Returns:
    The or predicate builder for the when expression

Interface CaseWhenStarterBuilder<T>

Method Summary

Method Detail

when

whenSubquery

whenSubquery

whenExists

whenNotExists

whenAnd

whenOr