org.jvoicexml.xml.vxml
Class Block

java.lang.Object
  org.jvoicexml.xml.AbstractXmlNode
      org.jvoicexml.xml.vxml.Block

All Implemented Interfaces:

VoiceXmlNode, XmlNode, XmlWritable, Node

public final class Block
extends AbstractXmlNode

This element is a form item. It contains executable content that is executed if the block's item variable is undefined and the block's cond attribute, if any, evaluates to true.

<block>
Welcome to Flamingo, your source for lawn ornaments.
</block>

The form item variable is automatically set to true just before the block is entered just once per form invocation.

Sometimes you may need more control over blocks. To do this, you can name the form item variable, and set or clear it to control execution of the %lt;block>. This variable is declared in the dialog scope of the form.

Version:

$Revision: 197 $

Copyright © 2005-2007 JVoiceXML group - http://jvoicexml.sourceforge.net/

Author:

Dirk Schnelle

See Also:

Form

Field Summary

static String	ATTRIBUTE_COND An expression thatmust evaluate to true after conversion to boolean in order for the form item to be visited.
static String	ATTRIBUTE_EXPR The initial value of the form item variable; default is ECMAScript undefined.
static String	ATTRIBUTE_NAME The name of the form item variable used to track whether this block is eligible to be executed; defaults to an inaccessible internal variable.
protected static ArrayList<String>	ATTRIBUTE_NAMES Supported attribute names for this node.
static String	TAG_NAME Name of the block tag.

Fields inherited from interface org.w3c.dom.Node

ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_FRAGMENT_NODE, DOCUMENT_NODE, DOCUMENT_POSITION_CONTAINED_BY, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_PRECEDING, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, NOTATION_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE

Constructor Summary

Block()
Construct a new block object without a node.

Method Summary

Text	addText(String text) Create a new text within this block.
protected boolean	canContainChild(String tagName) Can the specified sub-tag be contained within this node?
Collection<String>	getAttributeNames() Returns a collection of permitted attribute names for the node.
NodeList	getChildNodes() A NodeList that contains all children of this node.
String	getCond() Retrieve the cond attribute.
String	getExpr() Retrieve the expr attribute.
String	getName() Retrieve the name attribute.
String	getTagName() Get the name of the tag for the derived node.
VoiceXmlNode	newInstance(Node n) Create a new instance for the given node.
void	setCond(String cond) Set the cond attribute.
void	setExpr(String expr) Set the expr attribute.
void	setName(String name) Set the id attribute.

Methods inherited from class org.jvoicexml.xml.AbstractXmlNode

addChild, addChild, appendChild, cloneNode, compareDocumentPosition, getAttribute, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNode, getNodeFactory, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setAttribute, setNodeValue, setPrefix, setTextContent, setUserData, toString, writeChildrenXml, writeXml

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.jvoicexml.xml.XmlNode

addChild, getAttribute, getChildNodes, getNode, setAttribute

Methods inherited from interface org.jvoicexml.xml.XmlWritable

writeChildrenXml, writeXml

Methods inherited from interface org.w3c.dom.Node

appendChild, cloneNode, compareDocumentPosition, getAttributes, getBaseURI, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setNodeValue, setPrefix, setTextContent, setUserData

Field Detail

TAG_NAME

public static final String TAG_NAME

Name of the block tag.

See Also:

Constant Field Values

ATTRIBUTE_NAME

public static final String ATTRIBUTE_NAME

The name of the form item variable used to track whether this block is eligible to be executed; defaults to an inaccessible internal variable.

See Also:

Constant Field Values

ATTRIBUTE_EXPR

public static final String ATTRIBUTE_EXPR

The initial value of the form item variable; default is ECMAScript undefined. If initialized to a value, then the form item will not be visited unless the form item variable is cleared.

See Also:

Constant Field Values

ATTRIBUTE_COND

public static final String ATTRIBUTE_COND

An expression thatmust evaluate to true after conversion to boolean in order for the form item to be visited.

See Also:

Constant Field Values

ATTRIBUTE_NAMES

protected static final ArrayList<String> ATTRIBUTE_NAMES

Supported attribute names for this node.

Constructor Detail

Block

public Block()

Construct a new block object without a node.

This is necessary for the node factory.

See Also:

VoiceXmlNodeFactory

Method Detail

getName

public String getName()

Retrieve the name attribute.

Returns:

Value of the name attribute.

See Also:

ATTRIBUTE_NAME

setName

public void setName(String name)

Set the id attribute.

Parameters:

name - Value of the name attribute.

See Also:

ATTRIBUTE_NAME

getExpr

public String getExpr()

Retrieve the expr attribute.

Returns:

Value of the expr attribute.

See Also:

ATTRIBUTE_EXPR

setExpr

public void setExpr(String expr)

Set the expr attribute.

Parameters:

expr - Value of the id attribute.

See Also:

ATTRIBUTE_EXPR

getCond

public String getCond()

Retrieve the cond attribute.

Returns:

Value of the cond attribute.

See Also:

ATTRIBUTE_COND

setCond

public void setCond(String cond)

Set the cond attribute.

Parameters:

cond - Value of the cond attribute.

See Also:

ATTRIBUTE_COND

getTagName

public String getTagName()

Get the name of the tag for the derived node.

Returns:

name of the tag.

canContainChild

protected boolean canContainChild(String tagName)

Can the specified sub-tag be contained within this node?

Specified by:

canContainChild in class AbstractXmlNode

Parameters:

tagName - Name of child.

Returns:

True if the sub-tag is allowed on this node.

addText

public Text addText(String text)

Create a new text within this block.

Parameters:

text - The text to be added.

Returns:

The new created text.

newInstance

public VoiceXmlNode newInstance(Node n)

Create a new instance for the given node.

Parameters:

n - The node to encapsulate.

Returns:

The new instance.

See Also:

XmlNodeFactory

getAttributeNames

public Collection<String> getAttributeNames()

Returns a collection of permitted attribute names for the node.

Specified by:

getAttributeNames in interface XmlNode

Overrides:

getAttributeNames in class AbstractXmlNode

Returns:

A collection of attribute names that are allowed for the node

getChildNodes

public final NodeList getChildNodes()

A NodeList that contains all children of this node.

Specified by:

getChildNodes in interface Node

Returns:

NodeList