org.opensprout.osaf.web.support.PageNavigation.java Source code

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Here is the source code for org.opensprout.osaf.web.support.PageNavigation.java

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/**
 * Copyright (c) 2008 OpenSprout Team.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 */
package org.opensprout.osaf.web.support;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.opensprout.osaf.data.support.OrderPage;
import org.springframework.util.StringUtils;

/**
 * OSAF grid.tag uses this class to show navigation bar. 
 * @author Toby
 */
public class PageNavigation {
    final Log logger = LogFactory.getLog(getClass());

    private static final String PAGE_NAME = "grid.do";

    private static final Object PAGE_PARAM_NAME = "page";
    private static final Object PAGESIZE_PARAM_NAME = "pagesize";
    private static final Object ORDER_PARAM_NAME = "order";

    int rowCount;
    int pageSize;
    int page;
    String ord;
    String ordValue;
    String searchParams;
    String uriprefix;
    String order;

    public PageNavigation(OrderPage orderPage, HttpServletRequest req, String uriprefix) {
        this.rowCount = orderPage.getRowcount();
        this.pageSize = orderPage.getPagesize();
        this.page = orderPage.getPage();
        this.order = orderPage.getOrder();
        this.ord = "order=" + this.order;
        //      this.ord = orders.generateOrdersParamString();
        //      this.ordValue = orders.generateOrdersParamValue();
        this.searchParams = extractSearchParamsExceptPageParams(req);
        this.uriprefix = !StringUtils.hasText(uriprefix) ? "" : uriprefix;
    }

    @SuppressWarnings("unchecked")
    private String extractSearchParamsExceptPageParams(HttpServletRequest req) {
        StringBuilder param = new StringBuilder();

        try {
            Enumeration<String> e = req.getParameterNames();
            while (e.hasMoreElements()) {
                String key = e.nextElement();

                if (key.equals(PAGE_PARAM_NAME) || key.equals(PAGESIZE_PARAM_NAME) || key.equals(ORDER_PARAM_NAME))
                    continue;

                String value = req.getParameter(key);
                param.append("&");
                param.append(key);
                param.append("=");
                param.append(URLEncoder.encode(value, "EUC-KR"));
            }

            return param.toString();
        } catch (UnsupportedEncodingException e1) {
            throw new RuntimeException(e1);
        }
    }

    public String getNavigationBar() {
        StringBuffer str = new StringBuffer("");
        int pCount = 0;
        int pStart = 0;

        pCount = (rowCount - 1) / pageSize + 1;
        pStart = ((page - 1) / 10) * 10 + 1;
        if (page > 10) {
            str.append("<a href=\"");
            str.append(getPageUri(1));
            str.append("\">[]</a>\n");
            str.append("<a href=\"");
            str.append(getPageUri(pStart - 10));
            str.append("\">[]</a>\n");
        }

        for (int i = pStart; i <= pCount && i - pStart < 10; i++)
            if (i == page) {
                str.append("| <strong>");
                str.append(i);
                str.append("</strong>&nbsp;");
            } else {
                str.append("| <a href=\"");
                str.append(getPageUri(i));
                str.append("\">");
                str.append(i);
                str.append("</a>&nbsp;");
            }

        str.append("|");

        if (pCount - pStart >= 10) {
            str.append(" <a href=\"");
            str.append(getPageUri(pStart + 10));
            str.append("\">[]</a>");
            str.append(" <a href=\"");
            str.append(getPageUri(((pCount - 1) / 10) * 10 + 1));
            str.append("\">[]</a>");
        }
        return str.toString();
    }

    public String getUriWithoutPageSize() {
        return getUriWithOrd() + "&" + PAGE_PARAM_NAME + "=1";
    }

    public String getUriWithoutPageSizeWithoutOrd() {
        return getBaseUri() + "&" + PAGE_PARAM_NAME + "=1";
    }

    public String getUriWithOrd() {
        return getBaseUri() + "&" + ord;
    }

    public String getBaseUri() {
        return this.uriprefix + PAGE_NAME + "?" + this.searchParams;
    }

    private String getPageUri(int page) {
        return getUriWithOrd() + getPageParams(page);
    }

    private String getPageParams(int page) {
        return "&" + PAGE_PARAM_NAME + "=" + page + "&" + PAGESIZE_PARAM_NAME + "=" + this.pageSize;
    }

    public String getUriWithoutOrd() {
        return getBaseUri() + getPageParams(1);
    }

    public String getPageUriWithoutOrd(int page) {
        return getBaseUri() + getPageParams(page);
    }

    //   public boolean isAsc() {
    //      return this.orders.getOrders().get(0).getOrderType() == OrderType.ASC;
    //   }

    public boolean hasSameSortFields(String sort) {
        //      AbstractWebOrders ords = new AbstractWebOrders();
        //      ords.parseOrderString(sort);
        //      
        //      if (ords.getOrders().size() == this.orders.getOrders().size()) {
        //         List<Order> sortOrders = ords.getOrders();
        //         List<Order> thisOrders = this.orders.getOrders();
        //         
        //         for (int i = 0; i<sortOrders.size(); i++) {
        //            if (!sortOrders.get(i).getField().equalsIgnoreCase(thisOrders.get(i).getField())) return false;
        //         }
        //         
        //         return true;
        //      }
        return false;
    }

    //   public String reverseOrderType(String sort) {
    //      AbstractWebOrders ords = new AbstractWebOrders();
    //      ords.parseOrderString(sort);
    //      
    //      for(Order order : ords.getOrders()) {
    //         if (order.getOrderType() == OrderType.ASC) order.setOrderType(OrderType.DESC);
    //         else order.setOrderType(OrderType.ASC);
    //      }
    //      
    //      return ords.generateOrdersParamValue();
    //   }

    public String getOrd() {
        return ord;
    }

    public void setOrd(String ord) {
        this.ord = ord;
    }

    public String getOrdValue() {
        return ordValue;
    }
}