org.mmbase.bridge.jsp.taglib.util
Class NullAttribute

java.lang.Object
  org.mmbase.bridge.jsp.taglib.util.Attribute
      org.mmbase.bridge.jsp.taglib.util.NullAttribute

final class NullAttribute
extends Attribute

The attribute containing 'null' is special. No parsing needed, nothing needed. It is very often used, so we provide an implementation optimized for speed.

Nested Class Summary

Nested classes/interfaces inherited from class org.mmbase.bridge.jsp.taglib.util.Attribute

Attribute.ExpressionPart, Attribute.Part, Attribute.StringPart, Attribute.VariablePart

Field Summary

Fields inherited from class org.mmbase.bridge.jsp.taglib.util.Attribute

NULL

Constructor Summary

NullAttribute()

Method Summary

void	appendValue(ContextReferrerTag tag, StringBuilder buffer) Appends the evaluated Attribute to StringBuilder
String	getString(ContextReferrerTag tag) Returns the evaluated Attribute as a String.
Object	getValue(ContextReferrerTag tag) Returns the evaluated Attribute as an Object.
String	toString() String representation of this Attribute object (for debugging)

Methods inherited from class org.mmbase.bridge.jsp.taglib.util.Attribute

containsVars, getAttribute, getAttribute, getBoolean, getInt, getList, getLong, parse

Methods inherited from class java.lang.Object

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

Constructor Detail

NullAttribute

NullAttribute()

Method Detail

getValue

public final Object getValue(ContextReferrerTag tag)

Description copied from class: Attribute

Returns the evaluated Attribute as an Object. Can also be null.

Overrides:

getValue in class Attribute

Parameters:

tag - tag with the attribute

Returns:

Value of attribute

getString

public final String getString(ContextReferrerTag tag)

Description copied from class: Attribute

Returns the evaluated Attribute as a String. This is never null (empty string in that case)..

Overrides:

getString in class Attribute

Parameters:

tag - tag with the attribute

Returns:

Value of attribute

appendValue

public final void appendValue(ContextReferrerTag tag,
                              StringBuilder buffer)

Description copied from class: Attribute

Appends the evaluated Attribute to StringBuilder

Overrides:

appendValue in class Attribute

Parameters:

tag - The tag relative to which the variable evaluations must be done (normally 'this' in a Tag implementation)

buffer - buffer to write attribute value to

toString

public final String toString()

Description copied from class: Attribute

String representation of this Attribute object (for debugging)

Overrides:

toString in class Attribute

See Also:

Object.toString()