com.epam.ta.reportportal.ws.resolver.PagingHandlerMethodArgumentResolver.java Source code

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Here is the source code for com.epam.ta.reportportal.ws.resolver.PagingHandlerMethodArgumentResolver.java

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/*
 * Copyright 2016 EPAM Systems
 * 
 * 
 * This file is part of EPAM Report Portal.
 * https://github.com/reportportal/service-api
 * 
 * Report Portal is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Report Portal is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Report Portal.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.epam.ta.reportportal.ws.resolver;

import org.springframework.core.MethodParameter;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.SortHandlerMethodArgumentResolver;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * Added to avoid issue with page size == 0 (in this case repository layer tries
 * to retrieve all results from database) and page size greater than 300.
 * 
 * @author Andrei Varabyeu
 * 
 */
public class PagingHandlerMethodArgumentResolver
        extends org.springframework.data.web.PageableHandlerMethodArgumentResolver {

    public PagingHandlerMethodArgumentResolver() {
        super();
    }

    public PagingHandlerMethodArgumentResolver(SortHandlerMethodArgumentResolver sortResolver) {
        super(sortResolver);
    }

    public static final int DEFAULT_PAGE_SIZE = 50;
    public static final int MAX_PAGE_SIZE = 300;

    @Override
    public Pageable resolveArgument(MethodParameter methodParameter, ModelAndViewContainer mavContainer,
            NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
        Pageable pageable = super.resolveArgument(methodParameter, mavContainer, webRequest, binderFactory);
        if (0 == pageable.getPageSize()) {
            return new PageRequest(pageable.getPageNumber(), DEFAULT_PAGE_SIZE, pageable.getSort());
        } else if (MAX_PAGE_SIZE < pageable.getPageSize()) {
            return new PageRequest(pageable.getPageNumber(), MAX_PAGE_SIZE, pageable.getSort());
        }
        return pageable;
    }

}