HyperExpressBindHelper.java

/**
 * Copyright (C) 2015 Caratarse Auth Team <lucio.benfante@gmail.com>
 *
 * This file is part of Caratarse Auth Services.
 *
 * 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.caratarse.auth.services.util;

import com.strategicgains.hyperexpress.HyperExpress;
import org.restexpress.common.query.QueryRange;

/**
 * Some utilities for binding HyperExpress tokens.
 *
 * @author <a href="mailto:lucio.benfante@gmail.com">Lucio Benfante</a>
 */
public class HyperExpressBindHelper {
    
    public static void bindPaginationTokens(final QueryRange range, final long rows) {
        if (range.hasLimit()) {
            if (range.getOffset() + range.getLimit() <= rows) {
                HyperExpress.bind("nextOffset", Long.toString(range.getOffset() + range.getLimit()));
            }
            if (range.getOffset() - range.getLimit() >= 0) {
                HyperExpress.bind("prevOffset", Long.toString(range.getOffset() - range.getLimit()));
            }
        }
    }
}