htmlappletscanner.java

梦界家园程序开发基底框架

// HTMLParser Library v1.1 - A java-based parser for HTML
// Copyright (C) Dec 31, 2000 Somik Raha
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// For any questions or suggestions, you can write to me at :
// Email :[e-mail]
// 
// Postal Address : 
// Somik Raha
// R&D Team
// Kizna Corporation
// Hiroo ON Bldg. 2F, 5-19-9 Hiroo,
// Shibuya-ku, Tokyo, 
// 150-0012, 
// JAPAN
// Tel  :  [phone]
// Fax : [phone]
// Website : www.kizna.com

package jm.util.html.scanners;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

import jm.util.html.HTMLNode;
import jm.util.html.HTMLReader;
import jm.util.html.tags.HTMLAppletTag;
import jm.util.html.tags.HTMLEndTag;
import jm.util.html.tags.HTMLTag;
/**
 * Used to scan for applet tags.
 */
public class HTMLAppletScanner extends HTMLTagScanner {
	private java.lang.String className;
	private java.lang.String archive;
	private java.lang.String codebase;
/**
 * HTMLAppletScanner constructor comment.
 */
public HTMLAppletScanner() {
	super();
}
/**
 * HTMLAppletScanner constructor comment.
 * @param filter java.lang.String
 */
public HTMLAppletScanner(String filter) {
	super(filter);
}
	/**
	 * Template Method, used to decide if this scanner can handle this tag type. If the
	 * evaluation returns true, the calling side makes a call to scan().
	 * @param s The complete text contents of the HTMLTag.
	 * @param previousOpenScanner Indicates any previous scanner which hasnt completed, before the current
	 * scan has begun, and hence allows us to write scanners that can work with dirty html
	 */
public boolean evaluate(String s,HTMLTagScanner previousOpenScanner)
{
	// Eat up leading blanks
	s = absorbLeadingBlanks(s);
		
	if (s.toUpperCase().indexOf("APPLET")==0)
	return true;
	else return false;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:31:42 AM)
 * @param text java.lang.String
 */
public void extractFields(HTMLTag tag) 
{
    className = extractField(tag, "CODE");
    archive = extractField(tag, "ARCHIVE");
    codebase = extractField(tag, "CODEBASE");
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:34:38 AM)
 * @return java.lang.String
 */
public java.lang.String getArchive() {
	return archive;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:33:08 AM)
 * @return java.lang.String
 */
public java.lang.String getClassName() {
	return className;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:34:53 AM)
 * @return java.lang.String
 */
public java.lang.String getCodebase() {
	return codebase;
}
	/** 
	 * Scan the tag and extract the information related to this type. The url of the 
	 * initiating scan has to be provided in case relative links are found. The initial 
	 * url is then prepended to it to give an absolute link.
	 * The HTMLReader is provided in order to do a lookahead operation. We assume that
	 * the identification has already been performed using the evaluate() method.
	 * @param tag HTML Tag to be scanned for identification
	 * @param url The initiating url of the scan (Where the html page lies)
	 * @param reader The reader object responsible for reading the html page
	 */
@SuppressWarnings("unchecked")
public HTMLNode scan(HTMLTag tag, String url, HTMLReader reader, String currLine) throws java.io.IOException 
{
	//String tagContents = tag.getText();
	// From the tagContents, get the class name, archive, codebase
	extractFields(tag);

	String line;
	HTMLEndTag endTag=null;
	HTMLNode node = null;
	boolean endScriptFound=false;
	Vector buff=new Vector();
	Vector misc=new Vector();
	do
	{
		line = reader.getNextLine();
		if (line!=null)
		{
			node = HTMLEndTag.find(line,0);
			if (node!=null) 
			{
				endTag = (HTMLEndTag)node;
				if (endTag.getContents().toUpperCase().equals("APPLET")) 
				{
					endScriptFound = true; 
				}
			}
			else 
			{
				node = HTMLTag.find(reader,line,0);
				if (node!=null)
				buff.addElement(node);
			}
		}
	}
	while (!endScriptFound && line!=null);
	// buff may contain applet parameters.
	Hashtable table = new Hashtable();
	if (buff!=null)
	{
		for (Enumeration e = buff.elements();e.hasMoreElements();)
		{
			HTMLNode hnode = (HTMLNode)e.nextElement();
			if (hnode instanceof HTMLTag)
			{
				HTMLTag htag = (HTMLTag)hnode;
				String paramName = extractField(htag,"NAME");
				if (paramName!=null && paramName.length()!=0)
				{
					String paramValue = extractField(htag,"VALUE");
					table.put(paramName,paramValue);
				}
				else
				{
					misc.addElement(htag);
				}
			} 
		}
	}
	HTMLAppletTag appTag = new HTMLAppletTag(node.elementBegin(),node.elementEnd(),tag.getText(),currLine,className,archive,codebase,table,misc);
	appTag.setThisScanner(this);
	return appTag;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:34:38 AM)
 * @param newArchive java.lang.String
 */
public void setArchive(java.lang.String newArchive) {
	archive = newArchive;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:33:08 AM)
 * @param newClassName java.lang.String
 */
public void setClassName(java.lang.String newClassName) {
	className = newClassName;
}
/**
 * Insert the method's description here.
 * Creation date: (6/18/2001 2:34:53 AM)
 * @param newCodebase java.lang.String
 */
public void setCodebase(java.lang.String newCodebase) {
	codebase = newCodebase;
}
}