Package javax.servlet.jsp.tagext

Class TagAttributeInfo

java.lang.Object

javax.servlet.jsp.tagext.TagAttributeInfo

public class TagAttributeInfo
extends Object

Information on the attributes of a Tag, available at translation time. This class is instantiated from the Tag Library Descriptor file (TLD).

Only the information needed to generate code is included here. Other information like SCHEMA for validation belongs elsewhere.

Field Summary

Fields

Modifier and Type	Field	Description
static String	ID	"id" is wired in to be ID.

Constructor Summary

Constructors

Constructor	Description
TagAttributeInfo(String name, boolean required, String type, boolean reqTime)	Constructor for TagAttributeInfo.
TagAttributeInfo(String name, boolean required, String type, boolean reqTime, boolean fragment)	JSP 2.0 Constructor for TagAttributeInfo.
TagAttributeInfo(String name, boolean required, String type, boolean reqTime, boolean fragment, String description, boolean deferredValue, boolean deferredMethod, String expectedTypeName, String methodSignature)	JSP 2.1 Constructor for TagAttributeInfo.

Method Summary

Modifier and Type	Method	Description
boolean	canBeRequestTime()	Whether this attribute can hold a request-time value.
String	getDescription()	Obtain the description for the attribute,
String	getExpectedTypeName()	Obtain the type name, as a string, expected by this attribute.
static TagAttributeInfo	getIdAttribute(TagAttributeInfo[] tagAttributeInfos)	Convenience static method that goes through an array of TagAttributeInfo objects and looks for "id".
String	getMethodSignature()	If this is a deferred method attribute, obtain the expected method signature.
String	getName()	The name of this attribute.
String	getTypeName()	The type (as a String) of this attribute.
boolean	isDeferredMethod()	Does the attribute expect to be passed a deferred method?
boolean	isDeferredValue()	Does the attribute expect to be passed a deferred value?
boolean	isFragment()	Whether this attribute is of type JspFragment.
boolean	isRequired()	Whether this attribute is required.
String	toString()	Returns a String representation of this TagAttributeInfo, suitable for debugging purposes.

Methods inherited from class java.lang.Object

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

Field Detail

ID

public static final String ID

"id" is wired in to be ID. There is no real benefit in having it be something else IDREFs are not handled any differently.

See Also:

Constant Field Values

Constructor Detail

TagAttributeInfo

public TagAttributeInfo(String name,
                        boolean required,
                        String type,
                        boolean reqTime)

Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under request from some JSP code that is parsing a TLD (Tag Library Descriptor).

Parameters:

name - The name of the attribute.

required - If this attribute is required in tag instances.

type - The name of the type of the attribute.

reqTime - Whether this attribute holds a request-time Attribute.

TagAttributeInfo

public TagAttributeInfo(String name,
                        boolean required,
                        String type,
                        boolean reqTime,
                        boolean fragment)

JSP 2.0 Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under request from some JSP code that is parsing a TLD (Tag Library Descriptor).

Parameters:

name - The name of the attribute.

required - If this attribute is required in tag instances.

type - The name of the type of the attribute.

reqTime - Whether this attribute holds a request-time Attribute.

fragment - Whether this attribute is of type JspFragment

Since:

JSP 2.0

TagAttributeInfo

public TagAttributeInfo(String name,
                        boolean required,
                        String type,
                        boolean reqTime,
                        boolean fragment,
                        String description,
                        boolean deferredValue,
                        boolean deferredMethod,
                        String expectedTypeName,
                        String methodSignature)

JSP 2.1 Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under request from some JSP code that is parsing a TLD (Tag Library Descriptor).

Parameters:

name - The name of the attribute.

required - If this attribute is required in tag instances.

type - The name of the type of the attribute.

reqTime - Whether this attribute holds a request-time Attribute.

fragment - Whether this attribute is of type JspFragment

description - Description of this attribute

deferredValue - Does this attribute accept value expressions (written as Strings) as attribute values the evaluation of which is deferred until calculated by the tag

deferredMethod - Does this attribute accept method expressions (written as Strings) as attribute values the evaluation of which is deferred until calculated by the tag

expectedTypeName - The expected type when the deferred value is evaluated

methodSignature - The expected method signature if a deferred method

Since:

JSP 2.1

Method Detail

getName

public String getName()

The name of this attribute.

Returns:

the name of the attribute

getTypeName

public String getTypeName()

The type (as a String) of this attribute.

Returns:

the type of the attribute

canBeRequestTime

public boolean canBeRequestTime()

Whether this attribute can hold a request-time value.

Returns:

if the attribute can hold a request-time value.

isRequired

public boolean isRequired()

Whether this attribute is required.

Returns:

if the attribute is required.

getIdAttribute

public static TagAttributeInfo getIdAttribute(TagAttributeInfo[] tagAttributeInfos)

Convenience static method that goes through an array of TagAttributeInfo objects and looks for "id".

Parameters:

tagAttributeInfos - An array of TagAttributeInfo

Returns:

The TagAttributeInfo reference with name "id"

isFragment

public boolean isFragment()

Whether this attribute is of type JspFragment.

Returns:

if the attribute is of type JspFragment

Since:

JSP 2.0

toString

public String toString()

Returns a String representation of this TagAttributeInfo, suitable for debugging purposes.

Overrides:

toString in class Object

Returns:

a String representation of this TagAttributeInfo

isDeferredMethod

public boolean isDeferredMethod()

Does the attribute expect to be passed a deferred method?

Returns:

true if a deferred method expression is expected, otherwise false

isDeferredValue

public boolean isDeferredValue()

Does the attribute expect to be passed a deferred value?

Returns:

true if a deferred value expression is expected, otherwise false

getDescription

public String getDescription()

Obtain the description for the attribute,

Returns:

the description

getExpectedTypeName

public String getExpectedTypeName()

Obtain the type name, as a string, expected by this attribute.

Returns:

the type name, as a string

getMethodSignature

public String getMethodSignature()

If this is a deferred method attribute, obtain the expected method signature.

Returns:

The expected method signature or null if this attribute is not a deferred method attribute