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HHH-17779 support for key-based pagination

This commit is contained in:
Gavin King 2024-02-26 14:28:31 +01:00
parent 32bd334298
commit 5af80551ad
1 changed files with 11 additions and 5 deletions
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16
hibernate-core/src/main/java/org/hibernate/query/sqm/internal/AbstractSqmSelectionQuery.java
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@ -155,6 +155,7 @@ abstract class AbstractSqmSelectionQuery<R> extends AbstractSelectionQuery<R> {
private void addRestrictions(List<Order<? super R>> keyDefinition, List<Comparable<?>> keyValues) {
SqmSelectStatement<R> sqm = getSqmSelectStatement();
sqm = sqm.copy( noParamCopyContext() );
final NodeBuilder builder = sqm.nodeBuilder();
final SqmQuerySpec<R> querySpec = sqm.getQuerySpec();
final SqmWhereClause whereClause = querySpec.getWhereClause();
final List<? extends JpaSelection<?>> items = querySpec.getSelectClause().getSelectionItems();
@ -166,7 +167,8 @@ abstract class AbstractSqmSelectionQuery<R> extends AbstractSelectionQuery<R> {
whereClause.applyPredicate( keyPredicate(
(SqmFrom<?,?>) selected,
keyDefinition.get(i),
(Comparable) keyValues.get(i))
(Comparable) keyValues.get(i),
builder)
);
}
else {
@ -184,17 +186,21 @@ abstract class AbstractSqmSelectionQuery<R> extends AbstractSelectionQuery<R> {
}
private <C extends Comparable<? super C>> SqmPredicate keyPredicate(
SqmFrom<?, ?> selected, Order<? super R> key, C keyValue) {
SqmFrom<?, ?> selected, Order<? super R> key, C keyValue, NodeBuilder builder) {
if ( !key.getEntityClass().isAssignableFrom( selected.getJavaType() ) ) {
throw new IllegalQueryOperationException("Select item was of wrong entity type");
}
final Expression<? extends C> path = selected.get( key.getAttributeName() );
final NodeBuilder builder = getSqmStatement().nodeBuilder();
// TODO: use a parameter here and create a binding for it
// @SuppressWarnings("unchecked")
// final Class<C> valueClass = (Class<C>) keyValue.getClass();
// final JpaParameterExpression<C> parameter = builder.parameter(valueClass);
// setParameter( parameter, keyValue );
switch ( key.getDirection() ) {
case ASCENDING:
return builder.greaterThan( path, keyValue);
return builder.greaterThan( path, builder.literal(keyValue) );
case DESCENDING:
return builder.lessThan( path, keyValue);
return builder.lessThan( path, builder.literal(keyValue) );
default:
throw new AssertionFailure("Unrecognized key direction");
}