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/**
 * Copyright 1999-2015 dangdang.com.
 * 
 * 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 com.vip.saturn.job.console.utils;

import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;

public class PageableUtil {
    private static final int DEFAULT_PAGE = 1;
    private static final int DEFAULT_SIZE = 25;

    private PageableUtil() {

    }

    public static Pageable generatePageble(final int page, final int size) {
        return new Pageable() {
            @Override
            public int getPageNumber() {
                if (page <= 0) {
                    return DEFAULT_PAGE;
                }
                return page;
            }

            @Override
            public int getPageSize() {
                if (size <= 0) {
                    return DEFAULT_SIZE;
                }
                return size;
            }

            @Override
            public int getOffset() {
                return getPageSize() * (getPageNumber() - 1);
            }

            @Override
            public Sort getSort() {
                return null;
            }

            @Override
            public Pageable next() {
                return null;
            }

            @Override
            public Pageable previousOrFirst() {
                return null;
            }

            @Override
            public Pageable first() {
                return null;
            }

            @Override
            public boolean hasPrevious() {
                return false;
            }
        };
    }
}