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Class TagData

java.lang.Object  |  +--javax.servlet.jsp.tagext.TagData

All Implemented Interfaces:

java.lang.Cloneable

public classTagData

extends java.lang.Object

implements java.lang.Cloneable

The (translation-time only) attribute/value information for a tag instance.

TagData is only used as an argument to the isValid and getVariableInfo methods of TagExtraInfo, which are invoked at translation time.

REQUEST_TIME_VALUE

public static final java.lang.ObjectREQUEST_TIME_VALUE

Distinguished value for an attribute to indicate its value is a request-time expression (which is not yet available because TagData instances are used at translation-time).

TagData

publicTagData(java.lang.Object[][] atts)

Constructor for TagData.

A typical constructor may be

 static final Object[][] att = {{"connection", "conn0"}, {"id", "query0"}}; static final TagData td = new TagData(att);

All values must be Strings except for those holding the distinguished object REQUEST_TIME_VALUE.

Parameters:

atts - the static attribute and values. May be null.

TagData

publicTagData(java.util.Hashtable attrs)

Constructor for a TagData. If you already have the attributes in a hashtable, use this constructor.

Parameters:

attrs - A hashtable to get the values from.

getId

public java.lang.StringgetId()

The value of the id attribute, if available.

Returns:

the value of the id attribute or null

getAttribute

public java.lang.ObjectgetAttribute(java.lang.String attName)

The value of the attribute. Returns the distinguished object REQUEST_TIME_VALUE if the value is request time. Returns null if the attribute is not set.

Returns:

the attribute's value object

setAttribute

public voidsetAttribute(java.lang.String attName,                         java.lang.Object value)

Set the value of an attribute.

Parameters:

attName - the name of the attribute

value - the value.

getAttributeString

public java.lang.StringgetAttributeString(java.lang.String attName)

Get the value for a given attribute.

Returns:

the attribute value string

getAttributes

public java.util.EnumerationgetAttributes()

Enumerates the attributes.

Returns:

An enumeration of the attributes in a TagData