DefaultQueryEnhancer (Spring Data JPA 2.7.3 API)

java.lang.Object
- org.springframework.data.jpa.repository.query.DefaultQueryEnhancer

All Implemented Interfaces:

QueryEnhancer
```
public class DefaultQueryEnhancer
extends Object
implements QueryEnhancer
```
The implementation of QueryEnhancer using QueryUtils.

Since:

2.7.0

Author:

Diego Krupitza

Constructor Summary

Constructors
Constructor and Description

DefaultQueryEnhancer(org.springframework.data.jpa.repository.query.DeclaredQuery query)

Constructors
Constructor and Description
`DefaultQueryEnhancer(org.springframework.data.jpa.repository.query.DeclaredQuery query)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`applySorting(Sort sort, String alias)` Adds order by clause to the JPQL query.
`String`	`createCountQueryFor(String countProjection)` Creates a count projected query from the given original query using the provided `countProjection`.
`String`	`detectAlias()` Resolves the alias for the entity to be retrieved from the given JPA query.
`Set<String>`	`getJoinAliases()`
`String`	`getProjection()` Returns the projection part of the query, i.e. everything between `select` and `from`.
`org.springframework.data.jpa.repository.query.DeclaredQuery`	`getQuery()` Gets the query we want to use for enhancements.

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

Methods inherited from interface org.springframework.data.jpa.repository.query.QueryEnhancer
applySorting, createCountQueryFor, hasConstructorExpression

- Constructor Detail
  - DefaultQueryEnhancer
```
public DefaultQueryEnhancer(org.springframework.data.jpa.repository.query.DeclaredQuery query)
```
- Method Detail
  - applySorting
```
public String applySorting(Sort sort,
                           @Nullable
                           String alias)
```
    Description copied from interface: QueryEnhancer
    
    Adds order by clause to the JPQL query.
    
    Specified by:
    
    applySorting in interface QueryEnhancer
    
    Parameters:
    
    sort - the sort specification to apply.
    
    alias - the alias to be used in the order by clause. May be null or empty.
    
    Returns:
    
    the modified query string.
  - detectAlias
```
public String detectAlias()
```
    Description copied from interface: QueryEnhancer
    
    Resolves the alias for the entity to be retrieved from the given JPA query.
    
    Specified by:
    
    detectAlias in interface QueryEnhancer
    
    Returns:
    
    Might return null.
  - createCountQueryFor
```
public String createCountQueryFor(@Nullable
                                  String countProjection)
```
    Description copied from interface: QueryEnhancer
    
    Creates a count projected query from the given original query using the provided countProjection.
    
    Specified by:
    
    createCountQueryFor in interface QueryEnhancer
    
    Parameters:
    
    countProjection - may be null.
    
    Returns:
    
    a query String to be used a count query for pagination. Guaranteed to be not null.
  - getProjection
```
public String getProjection()
```
    Description copied from interface: QueryEnhancer
    
    Returns the projection part of the query, i.e. everything between select and from.
    
    Specified by:
    
    getProjection in interface QueryEnhancer
    
    Returns:
    
    the projection part of the query.
  - getJoinAliases
```
public Set<String> getJoinAliases()
```
    Specified by:
    
    getJoinAliases in interface QueryEnhancer
  - getQuery
```
public org.springframework.data.jpa.repository.query.DeclaredQuery getQuery()
```
    Description copied from interface: QueryEnhancer
    
    Gets the query we want to use for enhancements.
    
    Specified by:
    
    getQuery in interface QueryEnhancer
    
    Returns:
    
    non-null DeclaredQuery that wraps the query

Class DefaultQueryEnhancer

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.springframework.data.jpa.repository.query.QueryEnhancer

Constructor Detail

DefaultQueryEnhancer

Method Detail

applySorting

detectAlias

createCountQueryFor

getProjection

getJoinAliases

getQuery