org.apache.ignite.springdata22.repository.query

Class QueryUtils

java.lang.Object

org.apache.ignite.springdata22.repository.query.QueryUtils

public abstract class QueryUtils
extends Object

Simple utility class to create queries.

Field Summary

Fields

Modifier and Type	Field and Description
static String	COUNT_QUERY_STRING The constant COUNT_QUERY_STRING.
static String	DELETE_ALL_QUERY_STRING The constant DELETE_ALL_QUERY_STRING.

Method Summary

Modifier and Type	Method and Description
static String	getExistsQueryString(String entityName, String cntQryPlaceHolder, Iterable<String> idAttrs) Returns the query string to execute an exists query for the given id attributes.
static String	getProjection(String qry) Returns the projection part of the query, i.e. everything between select and from.
static String	getQueryString(String template, String entityName) Returns the query string for the given class name.
static boolean	hasConstructorExpression(String qry) Returns whether the given JPQL query contains a constructor expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COUNT_QUERY_STRING

public static final String COUNT_QUERY_STRING

The constant COUNT_QUERY_STRING.

See Also:

Constant Field Values

DELETE_ALL_QUERY_STRING

public static final String DELETE_ALL_QUERY_STRING

The constant DELETE_ALL_QUERY_STRING.

See Also:

Constant Field Values

Method Detail

getExistsQueryString

public static String getExistsQueryString(String entityName,
                                          String cntQryPlaceHolder,
                                          Iterable<String> idAttrs)

Returns the query string to execute an exists query for the given id attributes.

Parameters:

entityName - the name of the entity to create the query for, must not be null.

cntQryPlaceHolder - the placeholder for the count clause, must not be null.

idAttrs - the id attributes for the entity, must not be null.

Returns:

the exists query string

getQueryString

public static String getQueryString(String template,
                                    String entityName)

Returns the query string for the given class name.

Parameters:

template - must not be null.

entityName - must not be null.

Returns:

the template with placeholders replaced by the entityName. Guaranteed to be not null.

hasConstructorExpression

public static boolean hasConstructorExpression(String qry)

Returns whether the given JPQL query contains a constructor expression.

Parameters:

qry - must not be null or empty.

Returns:

boolean

getProjection

public static String getProjection(String qry)

Returns the projection part of the query, i.e. everything between select and from.

Parameters:

qry - must not be null or empty.

Returns:

projection