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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: HTMLApplet.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 com.ibm.as400.access.Trace;
import com.ibm.as400.access.ExtendedIllegalStateException;
import com.ibm.as400.access.ExtendedIllegalArgumentException;
import java.util.Vector;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyChangeListener;
/**
* The HTMLApplet class represents a java application embeded within an HTML page.
*
* This example creates a HTMLApplet tag:
*
* // Create an HTMLApplet.
* HTMLApplet applet = new HTMLApplet("myApplet", "http://myCompany.com/dir/", 100, 100);
*
* // Create a parameter, then add it to the applet.
* HTMLParameter param = new HTMLParameter("parm1", "value1");
* applet.addParameter(param);
*
* // Create and add second parameter
* HTMLParameter param2 = applet.addParameter("parm2", "value2");
* System.out.println(applet);
*
*
* Here is the output of the HTMLApplet tag:
*
* <applet name="myApplet" codebase="http://server:port/dir" width="100" height="100";>
* <param name="parm1" value="value1">
* <param name="parm2" value="value2">
* If you see this text, the browser does not support the APPLET tag or the applet has failed to load.
* </applet>
*
*
* HTMLApplet objects generate the following events:
*
* - ElementEvent - The events fired are:
*
* - elementAdded
*
- elementRemoved
*
* - PropertyChangeEvent
*
**/
public class HTMLApplet extends HTMLTagAttributes implements java.io.Serializable // @Z1C
{
private static final String copyright = "Copyright (C) 1997-2000 International Business Machines Corporation and others.";
static final long serialVersionUID = 3578237003243756490L;
private String archive_;
private String code_;
private String codebase_;
private int width_;
private int height_;
// The alternate text will get displayed if the Applet does not appear in the browser.
private String text_ = loader_.getText("PROP_DESC_APPLET_ALTTEXT");
private Vector list_; // The list of Applet parameters.
// Handles loading the appropriate resource bundle
private static ResourceBundleLoader_h loader_;
transient private Vector elementListeners; // The list of element listeners @CRS
/**
* Constructs a default HTMLApplet object.
**/
public HTMLApplet()
{
super();
list_ = new Vector();
}
/**
* Constructs an HTMLApplet object with the specified applet code.
*
* @param code The applet name.
**/
public HTMLApplet(String code)
{
super();
setCode(code);
list_ = new Vector();
}
/**
* Constructs an HTMLApplet object with the specified Applet code, width, and height.
*
* @param code The applet name.
* @param width The applet width.
* @param height The applet height.
**/
public HTMLApplet(String code, int width, int height)
{
super();
setCode(code);
setWidth(width);
setHeight(height);
list_ = new Vector();
}
/**
* Constructs an HTMLApplet object with the specified Applet code, codebase, width, height.
*
* @param code The applet name.
* @param codebase The base URL.
* @param width The applet width.
* @param height The applet height.
**/
public HTMLApplet(String code, String codebase, int width, int height)
{
super();
setCode(code);
setCodebase(codebase);
setWidth(width);
setHeight(height);
list_ = new Vector();
}
/**
* Constructs an HTMLApplet object with the specified Applet code, codebase, width, and height.
*
* @param code The applet name.
* @param codebase The base URL.
* @param width The applet width.
* @param height The applet height.
**/
public HTMLApplet(String archive, String code, String codebase, int width, int height)
{
super();
setArchive(archive);
setCode(code);
setCodebase(codebase);
setWidth(width);
setHeight(height);
list_ = new Vector();
}
/**
* Adds a parameter to the applet tag.
*
* @param param The parameter.
**/
public void addParameter(HTMLParameter param)
{
//@B1D
if (param == null)
throw new NullPointerException("param");
// add parameter to the list
list_.addElement(param);
fireElementEvent(ElementEvent.ELEMENT_ADDED);
}
/**
* Adds a HTMLParameter to the applet.
*
* @param name The parameter name.
* @param value The parameter value.
*
* @return An HTMLParameter object.
**/
public HTMLParameter addParameter(String name, String value)
{
//@B1D
if (name == null)
throw new NullPointerException("name");
if (value == null)
throw new NullPointerException("value");
//Create the HTMLParameter from the values passed in
HTMLParameter param = new HTMLParameter(name,value);
// Add the HTMLParameter to the group.
list_.addElement(param);
fireElementEvent(ElementEvent.ELEMENT_ADDED);
return param;
}
/**
* Adds an addElementListener.
* The specified addElementListeners elementAdded method will
* be called each time a HTMLParameter is added to the group.
* The addElementListener object is added to a list of addElementListeners
* managed by this HTMLApplet. It can be removed with removeElementListener.
*
* @see #removeElementListener
*
* @param listener The ElementListener.
**/
public void addElementListener(ElementListener listener)
{
if (listener == null)
throw new NullPointerException ("listener");
if (elementListeners == null) elementListeners = new Vector(); //@CRS
elementListeners.addElement(listener);
}
/**
* Fires the element event.
**/
private void fireElementEvent(int evt)
{
if (elementListeners == null) return;
Vector targets;
targets = (Vector) elementListeners.clone();
ElementEvent elementEvt = new ElementEvent(this, evt);
for (int i = 0; i < targets.size(); i++)
{
ElementListener target = (ElementListener)targets.elementAt(i);
if (evt == ElementEvent.ELEMENT_ADDED)
target.elementAdded(elementEvt);
else if (evt == ElementEvent.ELEMENT_REMOVED)
target.elementRemoved(elementEvt);
}
}
/**
* Returns the name of the archive(s).
* @return The archive(s).
**/
public String getArchive()
{
return archive_;
}
/**
* Returns the class name of the applet class.
* @return The applet name.
**/
public String getCode()
{
return code_;
}
/**
* Returns the base URL of the applet.
* @return The base URL.
**/
public String getCodebase()
{
return codebase_;
}
/**
* Returns the height of the applet in pixels.
* @return The height.
**/
public int getHeight()
{
return height_;
}
/**
* Returns the alternate text of the applet.
* @return The text.
**/
public String getText()
{
return text_;
}
/**
* Returns the width of the applet in pixels.
* @return The width.
**/
public int getWidth()
{
return width_;
}
/**
* Returns a comment tag.
* This method should not be called. There is no XSL-FO support for this class.
* @return The comment tag.
**/
public String getFOTag() //@C1A
{
Trace.log(Trace.ERROR, "Attempting to getFOTag() for an object that doesn't support it.");
return "";
}
/**
* Returns the tag for the HTML applet.
* @return The tag.
**/
public String getTag()
{
//@B1D
if (code_ == null)
{
Trace.log(Trace.ERROR, "Attempting to get tag before setting applet code.");
throw new ExtendedIllegalStateException("code", ExtendedIllegalStateException.PROPERTY_NOT_SET );
}
if (width_ <= 0)
{
Trace.log(Trace.ERROR, "Attempting to get tag before setting applet width.");
throw new ExtendedIllegalStateException("width", ExtendedIllegalStateException.PROPERTY_NOT_SET );
}
if (height_ <= 0)
{
Trace.log(Trace.ERROR, "Attempting to get tag before setting applet height.");
throw new ExtendedIllegalStateException("height", ExtendedIllegalStateException.PROPERTY_NOT_SET );
}
StringBuffer s = new StringBuffer("\n");
// add parameters to the Applet tag
for (int i=0; i< list_.size(); i++)
{
HTMLParameter p = (HTMLParameter)list_.elementAt(i);
s.append(p.getTag());
}
s.append(getText() + "\n");
s.append("\n");
return s.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);
//@CRS elementListeners = new Vector();
}
/**
* Removes a parameter from the applet tag.
* @param param The parameter.
**/
public void removeParameter(HTMLParameter param)
{
if (param == null)
throw new NullPointerException("param");
//@B1D
if (list_.removeElement(param))
fireElementEvent(ElementEvent.ELEMENT_REMOVED);
}
/**
* Removes this ElementListener from the internal list.
* If the ElementListener is not on the list, nothing is done.
*
* @see #addElementListener
*
* @param listener The ElementListener.
**/
public void removeElementListener(ElementListener listener)
{
if (listener == null)
throw new NullPointerException ("listener");
if (elementListeners != null) elementListeners.removeElement(listener); //@CRS
}
/**
* Sets the base URL of the applet. If the CODEBASE URL is relative, it is in
* relation to the current document URL.
*
* @param codebase The base URL.
**/
public void setCodebase(String codebase)
{
if (codebase == null)
throw new NullPointerException("codebase");
if (codebase.length() == 0)
{
throw new ExtendedIllegalArgumentException("codebase", ExtendedIllegalArgumentException.LENGTH_NOT_VALID);
}
//@B1D
String old = codebase_;
codebase_ = codebase;
if (changes_ != null) changes_.firePropertyChange("codebase", old, codebase ); //@CRS
}
/**
* Sets the name of one or more archives containing classes and other resources that will be "preloaded".
* The archives are separated by a ",".
*
* @param archive The applet archive(s).
**/
public void setArchive(String archive)
{
if (archive == null)
throw new NullPointerException("archive");
if (archive.length() == 0)
throw new ExtendedIllegalArgumentException("archive", ExtendedIllegalArgumentException.LENGTH_NOT_VALID);
//@B1D
String old = archive_;
archive_ = archive;
if (changes_ != null) changes_.firePropertyChange("archive", old, archive ); //@CRS
}
/**
* Sets the class name of the applet code.
*
* @param code The applet name.
**/
public void setCode(String code)
{
if (code == null)
throw new NullPointerException("code");
if (code.length() == 0)
throw new ExtendedIllegalArgumentException("code", ExtendedIllegalArgumentException.LENGTH_NOT_VALID);
//@B1D
String old = code_;
code_ = code;
if (changes_ != null) changes_.firePropertyChange("code", old, code ); //@CRS
}
/**
* Set the height of the applet in pixels.
*
* @param height The height.
**/
public void setHeight(int height)
{
if (height <= 0)
throw new ExtendedIllegalArgumentException("height", ExtendedIllegalArgumentException.RANGE_NOT_VALID);
//@B1D
int old = height_;
height_ = height;
if (changes_ != null) changes_.firePropertyChange("height", new Integer(old), new Integer(height) ); //@CRS
}
/**
* Set the alternate text for the Applet, which will be displayed if
* the browser does not support the APPLET tag or the applet fails to load.
*
* @param text The alternate text.
**/
public void setText(String text)
{
if (text == null)
throw new NullPointerException("text");
if (text.length() == 0)
throw new ExtendedIllegalArgumentException("text",
ExtendedIllegalArgumentException.LENGTH_NOT_VALID);
//@B1D
String old = text_;
text_ = text;
if (changes_ != null) changes_.firePropertyChange("text", old, text ); //@CRS
}
/**
* Set the width of the applet in pixels.
*
* @param width The width.
**/
public void setWidth(int width)
{
if (width <= 0)
throw new ExtendedIllegalArgumentException("width", ExtendedIllegalArgumentException.RANGE_NOT_VALID);
//@B1D
int old = width_;
width_ = width;
if (changes_ != null) changes_.firePropertyChange("width", new Integer(old), new Integer(width) ); //@CRS
}
/**
* Returns a String representation for the HTMLApplet tag.
* @return The tag.
**/
public String toString()
{
return getTag();
}
}
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