/** * Licensed under the Artistic License; you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * *      http://displaytag.sourceforge.net/license.html * * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */package org.displaytag.pagination;import java.text.MessageFormat;import java.util.List;import org.apache.commons.lang.builder.ToStringBuilder;import org.apache.commons.lang.builder.ToStringStyle;import org.displaytag.properties.TableProperties;import org.displaytag.util.Href;/** * An implementation of SmartListHelper used for externally sorted and paginated lists. It duplicates nearly all of its * superclass, so these two classes should be refactored * @author JBN */public class PaginatedListSmartListHelper extends SmartListHelper{    private PaginatedList paginatedList;    private TableProperties properties;    private int pageCount;    public PaginatedListSmartListHelper(PaginatedList paginatedList, TableProperties tableProperties)    {        super();        this.paginatedList = paginatedList;        this.properties = tableProperties;        this.pageCount = computePageCount();    }    private int computePageCount()    {        int pageCount = paginatedList.getFullListSize() / Math.max(1, paginatedList.getObjectsPerPage());        if ((paginatedList.getFullListSize() % paginatedList.getObjectsPerPage()) > 0)        {            pageCount++;        }        return pageCount;    }    public int getFirstIndexForCurrentPage()    {        return getFirstIndexForPage(paginatedList.getPageNumber());    }    protected int getFirstIndexForPage(int pageNumber)    {        if (pageNumber > pageCount)        {            pageNumber = pageCount;        }        return ((pageNumber - 1) * paginatedList.getObjectsPerPage());    }    protected int getLastIndexForCurrentPage()    {        return getLastIndexForPage(paginatedList.getPageNumber());    }    protected int getLastIndexForPage(int pageNumber)    {        if (pageNumber > pageCount)        {            pageNumber = pageCount;        }        int result = getFirstIndexForPage(pageNumber) + paginatedList.getObjectsPerPage() - 1;        if (result >= paginatedList.getFullListSize())        {            result = paginatedList.getFullListSize() - 1;        }        return result;    }    public List getListForCurrentPage()    {        return paginatedList.getList();    }    protected List getListForPage(int pageNumber)    {        if ((pageNumber) == paginatedList.getPageNumber())        {            return getListForCurrentPage();        }        else        {            return null;        }    }    public String getPageNavigationBar(Href baseHref, String pageParameter)    {        int groupSize = this.properties.getPagingGroupSize();        int startPage;        int endPage;        Pagination pagination = new Pagination(baseHref, pageParameter, this.properties);        pagination.setCurrent(new Integer(paginatedList.getPageNumber()));        // if no items are found still add pagination?        if (pageCount == 0)        {            pagination.addPage(1, true);        }        // center the selected page, but only if there are {groupSize} pages        // available after it, and check that the        // result is not < 1        startPage = Math.max(Math.min(paginatedList.getPageNumber() - groupSize / 2, pageCount - (groupSize - 1)), 1);        endPage = Math.min(startPage + groupSize - 1, pageCount);        if (paginatedList.getPageNumber() != 1)        {            pagination.setFirst(new Integer(1));            pagination.setPrevious(new Integer(paginatedList.getPageNumber() - 1));        }        for (int j = startPage; j <= endPage; j++)        {            pagination.addPage(j, (j == paginatedList.getPageNumber()));        }        if (paginatedList.getPageNumber() != pageCount)        {            pagination.setNext(new Integer(paginatedList.getPageNumber() + 1));            pagination.setLast(new Integer(pageCount));        }        // format for previous/next banner        String bannerFormat;        if (pagination.isOnePage())        {            bannerFormat = this.properties.getPagingBannerOnePage();        }        else if (pagination.isFirst())        {            bannerFormat = this.properties.getPagingBannerFirst();        }        else if (pagination.isLast())        {            bannerFormat = this.properties.getPagingBannerLast();        }        else        {            bannerFormat = this.properties.getPagingBannerFull();        }        return pagination.getFormattedBanner(this.properties.getPagingPageLink(), this.properties            .getPagingPageSelected(), this.properties.getPagingPageSeparator(), bannerFormat);    }    public String getSearchResultsSummary()    {        Object[] objs;        String message;        if (this.paginatedList.getFullListSize() == 0)        {            objs = new Object[]{this.properties.getPagingItemsName()};            message = this.properties.getPagingFoundNoItems();        }        else if (this.paginatedList.getFullListSize() == 1)        {            objs = new Object[]{this.properties.getPagingItemName()};            message = this.properties.getPagingFoundOneItem();        }        else if (pageCount == 1)        {            objs = new Object[]{                new Integer(this.paginatedList.getFullListSize()),                this.properties.getPagingItemsName(),                this.properties.getPagingItemsName()};            message = this.properties.getPagingFoundAllItems();        }        else        {            objs = new Object[]{                new Integer(this.paginatedList.getFullListSize()),                this.properties.getPagingItemsName(),                new Integer(getFirstIndexForCurrentPage() + 1),                new Integer(getLastIndexForCurrentPage() + 1),                new Integer(this.paginatedList.getPageNumber()),                new Integer(pageCount)};            message = this.properties.getPagingFoundSomeItems();        }        return MessageFormat.format(message, objs);    }    /**     * @see java.lang.Object#toString()     */    public String toString()    {        return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE) //            .append("paginatedList", this.paginatedList) //$NON-NLS-1$            .append("properties", this.properties) //$NON-NLS-1$            .toString();    }}