org.apache.xalan.client

## Class XSLTProcessorApplet

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

- All Implemented Interfaces:
    java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible

      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:

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class java.awt.Component

      `java.awt.Component.BaselineResizeBehavior`

  - ### Field Summary

    - ### Fields inherited from class java.awt.Component

      `BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

    - ### Fields inherited from interface java.awt.image.ImageObserver

      `ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `XSLTProcessorApplet()` The XSLTProcessorApplet constructor takes no arguments.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `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, isValidateRoot, 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, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, validate`

    - ### Methods inherited from class java.awt.Component

      `action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, dispatchEvent, enable, enable, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, 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, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocusInWindow, reshape, revalidate, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle`

    - ### 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
      Overrides:
        `getAppletInfo` in class `java.applet.Applet`
      Returns:
        A String with the applet name and author.

    - #### getParameterInfo

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

      Get descriptions of the applet parameters.
      Overrides:
        `getParameterInfo` in class `java.applet.Applet`
      Returns:
        A two-dimensional array of Strings with Name, Type, and Description for each parameter.

    - #### 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

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