Paging.java

/*
 * #%L
 * Wheelmap - App
 * %%
 * Copyright (C) 2011 - 2012 Michal Harakal - Michael Kroez - Sozialhelden e.V.
 * %%
 * Wheelmap App based on the Wheelmap Service by Sozialhelden e.V.
 * 
 * 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.
 * #L%
 */
package org.wheelmap.android.net.request;

public class Paging {

    public static final Paging DEFAULT_PAGING = new Paging(200, 1);

    public static final int MAX_NUMBER_OF_ITEMS_PER_PAGE = 500;

    public final int numberOfItemsPerPage;

    public int pageNumber;

    public Paging(int numberOfItemsPerPage) {
        this(numberOfItemsPerPage, 1);
    }

    public Paging(int numberOfItemsPerPage, int pageNumber) {
        if (numberOfItemsPerPage > MAX_NUMBER_OF_ITEMS_PER_PAGE) {
            throw new IllegalArgumentException(
                    "numberOfItemsPerPage must be <=" + MAX_NUMBER_OF_ITEMS_PER_PAGE);
        }
        this.numberOfItemsPerPage = numberOfItemsPerPage;
        this.pageNumber = pageNumber;
    }

    public void setPage(int pageNumber) {
        if (pageNumber < 1) {
            throw new IllegalArgumentException("pageNumber must be greater than zero");
        }
        this.pageNumber = pageNumber;
    }

    @Override
    public String toString() {
        return "Paging [numberOfItemsPerPage=" + numberOfItemsPerPage
                + ", pageNumber=" + pageNumber + "]";
    }
}