com.azaptree.services.domain.entity.dao.Page.java Source code

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Here is the source code for com.azaptree.services.domain.entity.dao.Page.java

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package com.azaptree.services.domain.entity.dao;

import org.springframework.util.Assert;

/*
 * #%L
 * AZAPTREE-DOMAIN-ENTITY
 * %%
 * Copyright (C) 2012 - 2013 AZAPTREE.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.
 * #L%
 */

public class Page {

    private final int pageSize;

    private final int page;

    public Page(final int page, final int pageSize) {
        Assert.isTrue(page >= 0, "contraint check failed: page >= 0");
        Assert.isTrue(pageSize >= 1, "contraint check failed: pageSize >= 1");
        this.page = page;
        this.pageSize = pageSize;
    }

    public long getOffset() {
        return page * pageSize;
    }

    public int getPage() {
        return page;
    }

    public int getPageSize() {
        return pageSize;
    }

    @Override
    public String toString() {
        return String.format("{pageSize=%d, page=%d}", pageSize, page);

    }
}