olapmodeltag.java

OLAP 的客户端代码

/*
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * Copyright (C) 2003-2004 TONBELLER AG.
 * All Rights Reserved.
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 *
 * 
 */
package com.tonbeller.jpivot.tags;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyTagSupport;

import org.apache.log4j.Logger;

import com.tonbeller.jpivot.olap.model.OlapModel;
import com.tonbeller.jpivot.olap.navi.ClickableExtension;
import com.tonbeller.jpivot.olap.navi.ClickableExtensionImpl;
import com.tonbeller.jpivot.table.ClickableMember;
import com.tonbeller.wcf.controller.RequestContext;

/**
 * places a table model into the session
 */
public abstract class OlapModelTag extends BodyTagSupport {

  private static Logger logger = Logger.getLogger(OlapModelTag.class);
  
  private List clickables;
  private String queryName;
  private boolean stackMode;

  public OlapModelTag() {
  }
  
  public void addClickable(ClickableMember clickable) {
    clickables.add(clickable);
  }

  public int doStartTag() throws JspException {
    clickables = new ArrayList();
    return EVAL_BODY_BUFFERED;
  }
  
  public int doEndTag() throws JspException {
    try {
      logger.info("enter");
      RequestContext context = RequestContext.instance();
      OlapModel om = getOlapModel(context);
      om = (OlapModel) om.getTopDecorator();
      om.setLocale(context.getLocale());
      om.setID(id);

      HttpSession session = pageContext.getSession();
      om.setServletContext(session.getServletContext());
      
      ClickableExtension ext = (ClickableExtension) om.getExtension(ClickableExtension.ID);
      if (ext == null) {
        ext = new ClickableExtensionImpl();
        om.addExtension(ext);
      }
      ext.setClickables(clickables);

      OlapModelProxy omp = OlapModelProxy.instance(id, session, stackMode);
      if (queryName != null)
        omp.initializeAndShow(queryName, om);
      else
        omp.initializeAndShow(om);

      return EVAL_PAGE;
    } catch (Exception e) {
      logger.error(null, e);
      throw new JspException(e);
    }
  }

  protected abstract OlapModel getOlapModel(RequestContext context) throws Exception;

  public void setQueryName(String queryName) {
    this.queryName = queryName;
  }
  public void setStackMode(boolean stackMode) {
    this.stackMode = stackMode;
  }
}