115 lines
3.4 KiB
Java
115 lines
3.4 KiB
Java
/*
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* This file is part of the L2J Mobius project.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jmobius.gameserver.model.html;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Objects;
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import com.l2jmobius.gameserver.model.html.formatters.DefaultFormatter;
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import com.l2jmobius.gameserver.model.html.pagehandlers.DefaultPageHandler;
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import com.l2jmobius.gameserver.model.html.styles.DefaultStyle;
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/**
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* @author UnAfraid
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* @param <T>
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*/
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public class PageBuilder<T>
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{
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private final Collection<T> _elements;
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private final int _elementsPerPage;
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private final String _bypass;
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private int _currentPage = 0;
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private IPageHandler _pageHandler = DefaultPageHandler.INSTANCE;
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private IBypassFormatter _formatter = DefaultFormatter.INSTANCE;
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private IHtmlStyle _style = DefaultStyle.INSTANCE;
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private IBodyHandler<T> _bodyHandler;
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private PageBuilder(Collection<T> elements, int elementsPerPage, String bypass)
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{
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_elements = elements;
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_elementsPerPage = elementsPerPage;
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_bypass = bypass;
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}
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public PageBuilder<T> currentPage(int currentPage)
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{
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_currentPage = Math.max(currentPage, 0);
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return this;
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}
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public PageBuilder<T> bodyHandler(IBodyHandler<T> bodyHandler)
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{
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Objects.requireNonNull(bodyHandler, "Body Handler cannot be null!");
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_bodyHandler = bodyHandler;
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return this;
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}
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public PageBuilder<T> pageHandler(IPageHandler pageHandler)
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{
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Objects.requireNonNull(pageHandler, "Page Handler cannot be null!");
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_pageHandler = pageHandler;
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return this;
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}
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public PageBuilder<T> formatter(IBypassFormatter formatter)
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{
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Objects.requireNonNull(formatter, "Formatter cannot be null!");
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_formatter = formatter;
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return this;
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}
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public PageBuilder<T> style(IHtmlStyle style)
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{
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Objects.requireNonNull(style, "Style cannot be null!");
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_style = style;
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return this;
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}
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public PageResult build()
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{
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Objects.requireNonNull(_bodyHandler, "Body was not set!");
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final int pages = (_elements.size() / _elementsPerPage) + ((_elements.size() % _elementsPerPage) > 0 ? 1 : 0);
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final StringBuilder pagerTemplate = new StringBuilder();
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if (pages > 1)
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{
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_pageHandler.apply(_bypass, _currentPage, pages, pagerTemplate, _formatter, _style);
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}
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if (_currentPage > pages)
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{
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_currentPage = pages - 1;
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}
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final int start = Math.max(_elementsPerPage * _currentPage, 0);
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final StringBuilder sb = new StringBuilder();
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_bodyHandler.create(_elements, pages, start, _elementsPerPage, sb);
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return new PageResult(pages, pagerTemplate, sb);
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}
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public static <T> PageBuilder<T> newBuilder(Collection<T> elements, int elementsPerPage, String bypass)
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{
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return new PageBuilder<>(elements, elementsPerPage, bypass.trim());
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}
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public static <T> PageBuilder<T> newBuilder(T[] elements, int elementsPerPage, String bypass)
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{
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return new PageBuilder<>(Arrays.asList(elements), elementsPerPage, bypass.trim());
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}
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}
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