src.com.ibm.as400.util.html.HTMLTagAttributes Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of jt400 Show documentation
The Open Source version of the IBM Toolbox for Java
There is a newer version: 20.0.7
///////////////////////////////////////////////////////////////////////////////
//                                                                             
// JTOpen (IBM Toolbox for Java - OSS version)                              
//                                                                             
// Filename: HTMLTagAttributes.java
//                                                                             
// The source code contained herein is licensed under the IBM Public License   
// Version 1.0, which has been approved by the Open Source Initiative.         
// Copyright (C) 1997-2000 International Business Machines Corporation and     
// others. All rights reserved.                                                
//                                                                             
///////////////////////////////////////////////////////////////////////////////

package com.ibm.as400.util.html;

import java.util.Properties;
import java.util.Enumeration;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyChangeListener;

/**
*  The HTMLTagAttributes class represents any additional HTML tag attributes
*  not implemented in the HTML classes.
*    
*  HTMLTagAttributes objects generate the following events:
*  

*    PropertyChangeEvent
*    
**/
public abstract class HTMLTagAttributes implements HTMLTagElement, java.io.Serializable
{
  private static final String copyright = "Copyright (C) 1997-2000 International Business Machines Corporation and others.";
  static final long serialVersionUID = -8745891871151787644L;

    private Properties attributes_;      // The additional html tag attributes.
    
    transient PropertyChangeSupport changes_; //@CRS
    

    /**
    *  Constructs a default HTMLTagAttributes.
    **/
    public HTMLTagAttributes()
    {
       super();
    }


    /**
     * Adds a PropertyChangeListener.  The specified PropertyChangeListener's
     * propertyChange method will be called each time the value of any
     * bound property is changed.
     * 
     * @see #removePropertyChangeListener
     *
     * @param listener The PropertyChangeListener.
    **/
    public void addPropertyChangeListener(PropertyChangeListener listener)
    {
      if (listener == null)
           throw new NullPointerException ("listener");
      if (changes_ == null) changes_ = new PropertyChangeSupport(this); //@CRS
      changes_.addPropertyChangeListener(listener);
    }

    
    /**
     *  Returns the attribute properties object.
     *
     *  @return The attributes.
     **/
    public Properties getAttributes()
    {
       return attributes_;
    }


    /**
     *  Returns the attribute string.
     *
     *  @return The attributes.
     **/
    public String getAttributeString()
    {
       if (attributes_ == null)
          return "";

       StringBuffer buffer = new StringBuffer("");

       Enumeration e = attributes_.propertyNames();
       
       while(e.hasMoreElements())
       {
          String s = (String)e.nextElement();
          buffer.append(" ");
          buffer.append(s);
          buffer.append("=");
          buffer.append("\"");
          buffer.append(attributes_.getProperty(s));
          buffer.append("\"");
       }

       return buffer.toString();
    }

    
    /**
    *  Deserializes and initializes transient data.
    **/
    private void readObject(java.io.ObjectInputStream in)          
        throws java.io.IOException, ClassNotFoundException
    {
        in.defaultReadObject();

        //@CRS changes_ = new PropertyChangeSupport(this);
    }


    /**
     *  Removes the PropertyChangeListener from the internal list.
     *  If the PropertyChangeListener is not on the list, nothing is done.
     *
     *  @see #addPropertyChangeListener
     *
     *  @param listener The PropertyChangeListener.
     **/
    public void removePropertyChangeListener(PropertyChangeListener listener)
    {
       if (listener == null)
            throw new NullPointerException ("listener");
       if (changes_ != null) changes_.removePropertyChangeListener(listener); //@CRS
    }


    /**
     *  Set the additional HTML tag attributes.
     *
     *  @param attributes The attributes.
     **/
    public void setAttributes(Properties attributes)
    {
       if (attributes == null)
          throw new NullPointerException("attributes");

       Properties old = attributes_;
       
       attributes_ = attributes;

       if (changes_ != null) changes_.firePropertyChange("attributes", old, attributes_ ); //@CRS
    }
}