Package javax.servlet.jsp.tagext
Class TagData
- java.lang.Object
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- javax.servlet.jsp.tagext.TagData
 
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- All Implemented Interfaces:
- java.lang.Cloneable
 
 public class TagData extends java.lang.Object implements java.lang.CloneableThe (translation-time only) attribute/value information for a tag instance.TagData is only used as an argument to the isValid, validate, and getVariableInfo methods of TagExtraInfo, which are invoked at translation time. 
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Field SummaryFields Modifier and Type Field Description static java.lang.ObjectREQUEST_TIME_VALUEDistinguished 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).
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.ObjectgetAttribute(java.lang.String attName)The value of the attribute.java.util.Enumeration<java.lang.String>getAttributes()Enumerates the attributes.java.lang.StringgetAttributeString(java.lang.String attName)Get the value for a given attribute.java.lang.StringgetId()The value of the tag's id attribute.voidsetAttribute(java.lang.String attName, java.lang.Object value)Set the value of an attribute.
 
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Constructor Detail- 
TagDatapublic TagData(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.
 
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TagDatapublic TagData(java.util.Hashtable<java.lang.String,java.lang.Object> 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.
 
 
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Method Detail- 
getIdpublic java.lang.String getId() The value of the tag's id attribute.- Returns:
- the value of the tag's id attribute, or null if no such attribute was specified.
 
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getAttributepublic java.lang.Object getAttribute(java.lang.String attName) The value of the attribute. If a static value is specified for an attribute that accepts a request-time attribute expression then that static value is returned, even if the value is provided in the body of a <jsp:attribute> action. The distinguished object REQUEST_TIME_VALUE is only returned if the value is specified as a request-time attribute expression or via the <jsp:attribute> action with a body that contains dynamic content (scriptlets, scripting expressions, EL expressions, standard actions, or custom actions). Returns null if the attribute is not set.- Parameters:
- attName- the name of the attribute
- Returns:
- the attribute's value
 
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setAttributepublic void setAttribute(java.lang.String attName, java.lang.Object value)Set the value of an attribute.- Parameters:
- attName- the name of the attribute
- value- the value.
 
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getAttributeStringpublic java.lang.String getAttributeString(java.lang.String attName) Get the value for a given attribute.- Parameters:
- attName- the name of the attribute
- Returns:
- the attribute value string
- Throws:
- java.lang.ClassCastException- if attribute value is not a String
 
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getAttributespublic java.util.Enumeration<java.lang.String> getAttributes() Enumerates the attributes.- Returns:
- An enumeration of the attributes in a TagData
 
 
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