Package javax.servlet.jsp.tagext
Class TagData
java.lang.Object
javax.servlet.jsp.tagext.TagData
- All Implemented Interfaces:
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.
-
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final Object
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). -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetAttribute
(String attName) The value of the attribute.Enumerates the attributes.getAttributeString
(String attName) Get the value for a given attribute.getId()
The value of the id attribute, if available.void
setAttribute
(String attName, Object value) Set the value of an attribute.
-
Field Details
-
REQUEST_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).
-
-
Constructor Details
-
TagData
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
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.
-
-
Method Details
-
getId
The value of the id attribute, if available.- Returns:
- the value of the id attribute or null
-
getAttribute
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
Set the value of an attribute.- Parameters:
attName
- the name of the attributevalue
- the value.
-
getAttributeString
Get the value for a given attribute.- Returns:
- the attribute value string
-
getAttributes
Enumerates the attributes.- Returns:
- An enumeration of the attributes in a TagData
-