extractsearchpropertytag.java

招标投标网上系统

/*
 *********************************************************************
 *  文件 : $Workfile: ExtractSearchPropertyTag.java $
 *  项目 : 腾龙1.2
 *  公司 : 沈阳东软软件股份有限公司
 *  日期 : $Date: 03-12-10 18:22 $
 *  说明 :
 **********************************************************************
 * 版本历史:
 * $Log: /4 开发工作目录/src/com/neusoft/taglibs/smart/ExtractSearchPropertyTag.java $
 * 
 * 1     03-12-10 18:22 Lihg
 * 
 * 1     03-12-10 8:44 Lihg
 *********************************************************************
 */
package com.neusoft.taglibs.smart;

import java.lang.reflect.*;
import java.util.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

/**
     *  This class allows you to retrieve a parameter from the request and output it
 *  to the page This should allow you to avoid expressions for extracting
 *  parameter info.
 *
 *@author     <a href="mailto:[e-mail]">李红国</a>
 *@created    2003年7月1日
 */

public class ExtractSearchPropertyTag
    extends BodyTagSupport {

  private String sourceId = null;
  private String sourceScope = null;
  private String targetScope = null;
  private String property = null;
  private Object targetObject = null;
  private String destinationId = null;
  private String paracount = null;

  private ArrayList parameters = new ArrayList();

  /**
   *  构造对象 ExtractSearchPropertyTag
   */
  public ExtractSearchPropertyTag() {
    super();
  }

  /**
   *  设定ExtractSearchPropertyTag object-id的属性值
   *
   *@param  sourceId  属性 id 的值
   */
  public void setId(String sourceId) {
    this.sourceId = sourceId;
  }

  /**
   *  设定ExtractSearchPropertyTag object-scope的属性值
   *
   *@param  sourceScope  属性 scope 的值
   */
  public void setScope(String sourceScope) {
    this.sourceScope = sourceScope.toLowerCase();
  }

  /**
   *  设定ExtractSearchPropertyTag object-destinationId的属性值
   *
   *@param  destinationId  属性 destinationId 的值
   */
  public void setDestinationId(String destinationId) {
    this.destinationId = destinationId;
  }

  /**
   *  设定ExtractSearchPropertyTag object-destinationScope的属性值
   *
   *@param  targetScope  属性 destinationScope 的值
   */
  public void setDestinationScope(String targetScope) {
    this.targetScope = targetScope.toLowerCase();
  }

  /**
   *  设定ExtractSearchPropertyTag object-property的属性值
   *
   *@param  property  属性 property 的值
   */
  public void setProperty(String property) {
    this.property = property;
  }

  /**
   *  设定ExtractSearchPropertyTag object-paracount的属性值
   *
   *@param  paracount  属性 paracount 的值
   */
  public void setParacount(String paracount) {
    this.paracount = paracount;
  }

  /**
   *  方法描述
   *
   *@return                      描述返回值信息
   *@exception  JspTagException  异常描述
   */
  public int doStartTag() throws JspTagException {
    //System.out.println("sdfsdfsdfsdf");
    targetObject = null;
    if (sourceScope.equals("request")) {
      targetObject = pageContext.getRequest().getAttribute(sourceId);
    }
    else if (sourceScope.equals("session")) {
      targetObject = pageContext.getSession().getAttribute(sourceId);
    }
    else if (sourceScope.equals("page")) {
      targetObject = pageContext.getAttribute(sourceId);
    }
    if (targetObject == null) {
      throw new JspTagException("ExtractSearchPropertyTag: Target Item " +
                                sourceId + " not found in " + sourceScope +
                                " scope.");
    }
    return EVAL_BODY_TAG;
  }

  /**
   *  方法描述
   *
   *@return                      描述返回值信息
   *@exception  JspTagException  异常描述
   */
  public int doEndTag() throws JspTagException {
    Object extractedObject = getProperty();
    if (targetScope.equals("request")) {
      pageContext.getRequest().setAttribute(destinationId, extractedObject);
    }
    else if (targetScope.equals("session")) {
      pageContext.getSession().setAttribute(destinationId, extractedObject);
    }
    else if (targetScope.equals("page")) {
      pageContext.setAttribute(destinationId, extractedObject);
    }
    parameters = null;
    sourceId = null;
    sourceScope = null;
    targetScope = null;
    property = null;
    targetObject = null;
    destinationId = null;
    return EVAL_PAGE;
  }

  /**
   *  Using the current Object use reflection to obtain the String data from
   *  the element method the same as a JavaBean would use: <Br>
   *  <br>
   *  e.g. a getXXXX method which has no parameters <br>
   *  The target method is the property attribute
   *
   *@return                      属性 property的值
   *@exception  JspTagException  异常描述
   */
  private Object getProperty() throws JspTagException {
    //String targetMethod = property.substring(0,1).toUpperCase() + property.substring(1,property.length());
    String targetMethod = property;
    Object returnValue = null;
    try {
      // set arguments if  needed
      Class[] args = null;
      Object[] params = null;
      Object[] paralist = null;
      ArrayList aparalist = null;
      ArrayList sqlnblist = null;
      if (parameters == null) {
        Class[] tempArgs = {};
        args = tempArgs;
        Object[] tempParams = {};
        params = tempParams;
      }
      else {
        // set the parameters here
        args = new Class[parameters.size()];
        params = new Object[parameters.size()];
        Iterator it = parameters.iterator();
        int index = 0;
        //System.out.println("paracount="+paracount);

        int pcount = 0;
        Integer count = new Integer( -1);
        Integer start = new Integer( -1);
        String sqlname = "";
        while (it.hasNext()) {
          ParameterItem item = (ParameterItem) it.next();
          //System.out.println("-----------------------" + item);
          if (item.getName().equals("start")) {
            start = new Integer(item.getParameter());
          }
          else if (item.getName().equals("count")) {
            count = new Integer(item.getParameter());
          }
          else if (item.getName().equals("sql")) {
            sqlname = item.getParameter();
          }
          else {
            if (aparalist == null) {
              aparalist = new ArrayList();
            }
            if (item.getType().equals("int")) {
              aparalist.add(new Integer(item.getParameter()));
              ;
            }
            else if (item.getType().equals("long")) {
              aparalist.add(new Long(item.getParameter()));
            }
            else {
              String escapeString = item.getEscapeString();
              String parameter = item.getParameter();
              if (escapeString != null && parameter.equals(escapeString)) {
                if (sqlnblist == null) {
                  sqlnblist = new ArrayList();
                }
                sqlnblist.add(item.getSqlnb());
              }
              else {
                aparalist.add(parameter);
              }
            }
            paralist = aparalist.toArray();
          }

        }
        args = new Class[5];
        args[1] = Class.forName("[Ljava.lang.Object;");
        args[0] = String.class;
        args[2] = int.class;
        args[3] = int.class;
        args[4] = Class.forName("java.util.ArrayList");
        params = new Object[5];
        params[1] = paralist;
        params[0] = sqlname;
        params[2] = start;
        params[3] = count;
        params[4] = sqlnblist;

      }
      ////System.out.println(targetObject.getClass().getName());
      //Method[] mm=targetObject.getClass().getMethods();
      //for(int i=0;i<mm.length;i++){
      //System.out.println("---"+mm[i].getName());
      //for(int j=0;j<mm[i].getParameterTypes().length;j++)

      //	System.out.println(mm[i].getParameterTypes()[j].getName());
      //}
      //System.out.println(targetObject.getClass());
      Method m = targetObject.getClass().getMethod(property, args);

      ////System.out.printn(m.getName());
      if (m == null) {
        throw new JspTagException(
            "ExtractPropertyTag: There is no method by the name of " +
            targetMethod);
      }
      returnValue = m.invoke(targetObject, params);
    }
    catch (java.lang.NoSuchMethodException ex) {
      ex.printStackTrace();
      throw new JspTagException("ExtractPropertyTag: Method for property " +
                                property + " not found.");
    }
    catch (java.lang.reflect.InvocationTargetException ex) {
      ex.printStackTrace();
      throw new JspTagException("ExtractPropertyTag: Error calling method " +
                                targetMethod + ":" + ex);
    }
    catch (java.lang.IllegalAccessException ex) {
      ex.printStackTrace();
      throw new JspTagException("ExtractPropertyTag: Error calling method " +
                                targetMethod + ":" + ex);
    }
    catch (java.lang.ClassNotFoundException ex) {
      ex.printStackTrace();
      throw new JspTagException("ExtractPropertyTag: Error calling method " +
                                targetMethod + ":" + ex);
    }
    return returnValue;
  }

  /**
   *  在ExtractSearchPropertyTag object中Adds a feature to the Parameter
   *  attribute of the
   *
   *@param  name          The feature to be added to the Parameter attribute
   *@param  parameter     The feature to be added to the Parameter attribute
   *@param  type          The feature to be added to the Parameter attribute
   *@param  escapeString  The feature to be added to the Parameter attribute
   *@param  sqlnb         The feature to be added to the Parameter attribute
   */
  public void addParameter(String name, String parameter, String type,
                           String escapeString, String sqlnb) {
    //System.out.println(name + "=" + parameter + "=" + type + "=" + escapeString +
                       //"=" + sqlnb);
    ParameterItem parameterItem = new ParameterItem(name, parameter, type,
        escapeString, sqlnb);
    //System.out.println("-----------" + parameters);
    if (parameters == null) {
      parameters = new ArrayList();
    }
    parameters.add(parameterItem);
    //System.out.println("11111111111111111111111111111");
  }

  // This class represents a parameter for internal use in this class only

  /**
   *  类描述
   *
   *@author     <a href="mailto:[e-mail]">李红国</a>
   *@created    2003年7月1日
   */
  class ParameterItem {

    private String parameter;
    private String type;
    private String name;
    private String escapeString;
    private String sqlnb;

    /**
     *  构造对象 ParameterItem
     *
     *@param  name          参数描述
     *@param  parameter     参数描述
     *@param  type          参数描述
     *@param  escapeString  参数描述
     *@param  sqlnb         参数描述
     */
    ParameterItem(String name, String parameter, String type,
                  String escapeString, String sqlnb) {
      this.name = name;
      this.parameter = parameter;
      this.type = type;
      this.escapeString = escapeString;
      this.sqlnb = sqlnb;
    }

    /**
     *  取得 ParameterItem object 的属性parameter
     *
     *@return    属性 parameter的值
     */
    public String getParameter() {
      return parameter;
    }

    /**
     *  取得 ParameterItem object 的属性type
     *
     *@return    属性 type的值
     */
    public String getType() {
      return type;
    }

    /**
     *  取得 ParameterItem object 的属性name
     *
     *@return    属性 name的值
     */
    public String getName() {
      return name;
    }

    /**
     *  取得 ParameterItem object 的属性escapeString
     *
     *@return    属性 escapeString的值
     */
    public String getEscapeString() {
      return escapeString;
    }

    /**
     *  取得 ParameterItem object 的属性sqlnb
     *
     *@return    属性 sqlnb的值
     */
    public String getSqlnb() {
      return sqlnb;
    }

  }
}