PaginationUtils.java
/*
* Copyright 2020 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.keycloak.models.jpa;
import jakarta.persistence.TypedQuery;
public class PaginationUtils {
public static final int DEFAULT_MAX_RESULTS = Integer.MAX_VALUE >> 1;
public static <T> TypedQuery<T> paginateQuery(TypedQuery<T> query, Integer first, Integer max) {
if (first != null && first >= 0) {
query = query.setFirstResult(first);
// Workaround for https://hibernate.atlassian.net/browse/HHH-14295
if (max == null || max < 0) {
max = DEFAULT_MAX_RESULTS;
}
}
if (max != null && max >= 0) {
query = query.setMaxResults(max);
}
return query;
}
}