org.apache.xalan.client
Class XSLTProcessorApplet

java.lang.Object
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  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--org.apache.xalan.client.XSLTProcessorApplet

public class XSLTProcessorApplet

extends java.applet.Applet

Provides applet host for the XSLT processor. To perform transformations on an HTML client:

1. Use an <applet> tag to embed this applet in the HTML client.
2. Use the DocumentURL and StyleURL PARAM tags or the setDocumentURL(java.lang.String) and setStyleURL(java.lang.String) methods to specify the XML source document and XSL stylesheet.
3. Call the getHtmlText() method (or one of the transformToHtml() methods) to perform the transformation and return the result as a String.

This class extends Applet which ultimately causes this class to implement Serializable. This is a serious restriction on this class. All fields that are not transient and not static are written-out/read-in during serialization. So even private fields essentially become part of the API. Developers need to take care when modifying fields.

See Also:

Serialized Form

Usage:

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Constructor Summary

XSLTProcessorApplet()
The XSLTProcessorApplet constructor takes no arguments.

Method Summary

void	destroy() Cleanup; called when applet is terminated and unloaded.
java.lang.String	escapeString(java.lang.String s) Given a String containing markup, escape the markup so it can be displayed in the browser.
void	freeCache() The processor keeps a cache of the source and style trees, so call this method if they have changed or you want to do garbage collection.
java.lang.String	getAppletInfo() Get basic information about the applet
java.lang.String	getHtmlText() Assuming the stylesheet URL and the input XML URL have been set, perform the transformation and return the result as a String.
java.lang.String[][]	getParameterInfo() Get descriptions of the applet parameters.
java.lang.String	getResultTreeAsText() Get the HTML result Tree as a text string suitable for display in a browser.
java.lang.String	getSourceTreeAsText() Get the XML source Tree as a text string suitable for display in a browser.
java.lang.String	getStyleTreeAsText() Get the XSL style Tree as a text string suitable for display in a browser.
java.lang.String	getTreeAsText(java.lang.String treeURL) Get an XML document (or stylesheet)
void	init() Standard applet initialization.
void	paint(java.awt.Graphics g) Do not call; this applet contains no UI or visual components.
void	setDocumentURL(java.lang.String urlString) Set the URL to the XML document that will be transformed with the XSL stylesheet.
void	setStyleSheetAttribute(java.lang.String nameOfIDAttrOfElemToModify, java.lang.String elemId, java.lang.String attrName, java.lang.String value) Set an attribute in the stylesheet, which gives the ability to have some dynamic selection control.
void	setStylesheetParam(java.lang.String key, java.lang.String expr) Submit a stylesheet parameter.
void	setStyleURL(java.lang.String urlString) Set the URL to the XSL stylesheet that will be used to transform the input XML.
void	start() Automatically called when the HTML client containing the applet loads.
void	stop() Automatically called when the HTML page containing the applet is no longer on the screen.
java.lang.String	transformToHtml(java.lang.String doc) Process a document and a stylesheet and return the transformation result.
java.lang.String	transformToHtml(java.lang.String doc, java.lang.String style) Process a document and a stylesheet and return the transformation result.

Methods inherited from class java.applet.Applet

getAccessibleContext, getAppletContext, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, remove, remove, removeAll, removeContainerListener, removeNotify, setFont, setLayout, update, validate

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, contains, contains, createImage, createImage, disable, dispatchEvent, enable, enable, enableInputMethods, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocation, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

XSLTProcessorApplet

public XSLTProcessorApplet()

The XSLTProcessorApplet constructor takes no arguments.

Method Detail

getAppletInfo

public java.lang.String getAppletInfo()

Get basic information about the applet

Returns:

A String with the applet name and author.

Overrides:

getAppletInfo in class java.applet.Applet

getParameterInfo

public java.lang.String[][] getParameterInfo()

Get descriptions of the applet parameters.

Returns:

A two-dimensional array of Strings with Name, Type, and Description for each parameter.

Overrides:

getParameterInfo in class java.applet.Applet

init

public void init()

Standard applet initialization.

Overrides:

init in class java.applet.Applet

start

public void start()

Automatically called when the HTML client containing the applet loads. This method starts execution of the applet thread.

Overrides:

start in class java.applet.Applet

paint

public void paint(java.awt.Graphics g)

Do not call; this applet contains no UI or visual components.

Overrides:

paint in class java.awt.Container

stop

public void stop()

Automatically called when the HTML page containing the applet is no longer on the screen. Stops execution of the applet thread.

Overrides:

stop in class java.applet.Applet

destroy

public void destroy()

Cleanup; called when applet is terminated and unloaded.

Overrides:

destroy in class java.applet.Applet

setStyleURL

public void setStyleURL(java.lang.String urlString)

Set the URL to the XSL stylesheet that will be used to transform the input XML. No processing is done yet.

Parameters:

urlString - valid URL string for XSL stylesheet.

setDocumentURL

public void setDocumentURL(java.lang.String urlString)

Set the URL to the XML document that will be transformed with the XSL stylesheet. No processing is done yet.

Parameters:

urlString - valid URL string for XML document.

freeCache

public void freeCache()

The processor keeps a cache of the source and style trees, so call this method if they have changed or you want to do garbage collection.

setStyleSheetAttribute

public void setStyleSheetAttribute(java.lang.String nameOfIDAttrOfElemToModify,
                                   java.lang.String elemId,
                                   java.lang.String attrName,
                                   java.lang.String value)

Set an attribute in the stylesheet, which gives the ability to have some dynamic selection control.

Parameters:

nameOfIDAttrOfElemToModify - The name of an attribute to search for a unique id.

elemId - The unique ID to look for.

attrName - Once the element is found, the name of the attribute to set.

value - The value to set the attribute to.

setStylesheetParam

public void setStylesheetParam(java.lang.String key,
                               java.lang.String expr)

Submit a stylesheet parameter.

Parameters:

key - stylesheet parameter key

expr - the parameter expression to be submitted.

See Also:

Transformer.setParameter(String,Object)

escapeString

public java.lang.String escapeString(java.lang.String s)

Given a String containing markup, escape the markup so it can be displayed in the browser.

Parameters:

s - String to escape The escaped string.

getHtmlText

public java.lang.String getHtmlText()

Assuming the stylesheet URL and the input XML URL have been set, perform the transformation and return the result as a String.

Returns:

A string that contains the contents pointed to by the URL.

getTreeAsText

public java.lang.String getTreeAsText(java.lang.String treeURL)
                               throws java.io.IOException

Get an XML document (or stylesheet)

Parameters:

treeURL - valid URL string for the document.

Returns:

document

Throws:

java.io.IOException -

getSourceTreeAsText

public java.lang.String getSourceTreeAsText()
                                     throws java.lang.Exception

Get the XML source Tree as a text string suitable for display in a browser. Note that this is for display of the XML itself, not for rendering of HTML by the browser.

Returns:

XML source document as a string.

Throws:

java.lang.Exception - thrown if tree can not be converted.

getStyleTreeAsText

public java.lang.String getStyleTreeAsText()
                                    throws java.lang.Exception

Get the XSL style Tree as a text string suitable for display in a browser. Note that this is for display of the XML itself, not for rendering of HTML by the browser.

Returns:

The XSL stylesheet as a string.

Throws:

java.lang.Exception - thrown if tree can not be converted.

getResultTreeAsText

public java.lang.String getResultTreeAsText()
                                     throws java.lang.Exception

Get the HTML result Tree as a text string suitable for display in a browser. Note that this is for display of the XML itself, not for rendering of HTML by the browser.

Returns:

Transformation result as unmarked text.

Throws:

java.lang.Exception - thrown if tree can not be converted.

transformToHtml

public java.lang.String transformToHtml(java.lang.String doc,
                                        java.lang.String style)

Process a document and a stylesheet and return the transformation result. If one of these is null, the existing value (of a previous transformation) is not affected.

Parameters:

doc - URL string to XML document

style - URL string to XSL stylesheet

Returns:

HTML transformation result

transformToHtml

public java.lang.String transformToHtml(java.lang.String doc)

Process a document and a stylesheet and return the transformation result. Use the xsl:stylesheet PI to find the document, if one exists.

Parameters:

doc - URL string to XML document containing an xsl:stylesheet PI.

Returns:

HTML transformation result