goeventinstance.java

一个用 java写的wap浏览器 对于浏览器感兴趣起的可以看看咯

/*
 * j2wap is distributed under the terms of the GNU Public License
 *
 *  j2wap was written by:
 *
 *	        Scott Campbell
 *			Michael Nordling
 *			Karl Maftoum
 * 			Julian Bright
 *
 *			This was a final project for Comp.Engineering at the University of Canberra, Australia
 *
 *			Now released as Open Source software. 28 November 2000
 *
 *			Email: [e-mail] for more info
 *
 *			Use entirely at your own risk.
 */

package wae;
import java.util.Stack;

/**
 * A storage class for a GO event used by EventManagement.<br>
 * Company: J2wap.com
 * @author  Julian Bright, Scott Campbell.
 * @version 1.1
 */
public class GoEventInstance extends EventInstance
{
  /** SendReferer flag for URL */
  private boolean         c_bolSendReferer;
  /** Method for URL */
  private String          c_clsStrMethod;
  /** Encoding type for URL */
  private String          c_clsStrEncType;
  /** Stack for Post variables */
  private Stack           c_clsPostStack;

  /**
   * Constructor calls the super's constructor and initialises postfield stack.
   * @param EventType To initialize the object (should allways be 1)
   */
  public GoEventInstance (int in_intEventType)
  {
    super(in_intEventType);
    c_clsPostStack = new Stack();
  }

  /**
   * Returns the method type for the URL operation.
   * @return The method type:
   * <ul>
   * <li>GET
   * <li>POST
   * </ul>
   */
  public String getMethod ()
  {
    return c_clsStrMethod;
  }

  /**
   * Set attributes on the GO event
   * @param in_strURL The URL for go event. <i>(Pre-condition: URL != null)</i>
   * @param in_bolSendReferer Boolean indicating whether to send the referer. (Not used)
   * @param in_strMethod The method type (GET/POST)
   * @param in_strEncType Determines the Encoding type for data retrived. (Not used)
   */
   public void setAttributes (String  in_strURL,
                              boolean in_bolSendReferer,
                              String  in_strMethod,
                              String  in_strEncType)
  {
    in_bolSendReferer = c_bolSendReferer;

    // Apply defaults if a parameter is null.
    if (in_strURL != null)
      setURL (in_strURL);
    if (in_strMethod == null)
      c_clsStrMethod = "GET";
    else
      c_clsStrMethod = new String(in_strMethod);
    if (in_strEncType == null)
      c_clsStrEncType = "application/x-www-form-urlencoded";
    else
      c_clsStrEncType = new String(in_strEncType);
  } // setAttributes

  /**
   * Adds a postfield to the internal store.
   * @param in_strName The name of the new postfield.
   * @param in_strValue The value associated with the name.
   */
  public void addPostfield(String in_strName, String in_strValue)
  {
    c_clsPostStack.push(in_strValue);
    c_clsPostStack.push(in_strName);
  } // addPostfield

  /**
   * Build up postfield string.
   * @param  in_clsBrowserContext The Browser Context reference.
   * @return Postfield string.
   */
  public String getPostfieldStr(BrowserContext in_clsBrowserContext)
  {
    String strName;
    String strVal;
    StringBuffer strBPost = new StringBuffer("?");

    while (!c_clsPostStack.empty())
    {
      strName = (String)c_clsPostStack.pop();
      strVal = (String)c_clsPostStack.pop();

      // Add to the postfield string.
      strBPost.append(strName + strVal + '&');
    } // while

    // Remove the last '&' or '?' if no postfields.
    strBPost.deleteCharAt(strBPost.length()-1);
    return strBPost.toString();

  } // getPostfieldStr

} // class goEventInstance