java.lang.Object
- javax.faces.view.facelets.TagAttribute

```
public abstract class TagAttribute
extends Object
```
Representation of an XML attribute name=value pair on an XML element in a Facelet file.

Since:

2.0

Constructor Summary

Constructors
Constructor and Description

TagAttribute()

Eerste pagina van API Java Inhoudsopgave Haut

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract boolean`	`getBoolean(FaceletContext ctx)` If literal, return `Boolean.getBoolean(java.lang.String)` passing our value, otherwise call `getObject(FaceletContext, Class)`.
`abstract int`	`getInt(FaceletContext ctx)` If literal, call `Integer.parseInt(String)`, otherwise call `getObject(FaceletContext, Class)`.
`abstract String`	`getLocalName()` Local name of this attribute
`abstract Location`	`getLocation()` The location of this attribute in the FaceletContext
`abstract MethodExpression`	`getMethodExpression(FaceletContext ctx, Class type, Class[] paramTypes)` Create a MethodExpression, using this attribute's value as the expression String.
`abstract String`	`getNamespace()` The resolved Namespace for this attribute
`abstract Object`	`getObject(FaceletContext ctx)` Delegates to getObject with Object.class as a param
`abstract Object`	`getObject(FaceletContext ctx, Class type)` If literal, simply coerce our String literal value using an ExpressionFactory, otherwise create a ValueExpression and evaluate it.
`abstract String`	`getQName()` The qualified name for this attribute
`Tag`	`getTag()` A reference to the Tag for which this class represents the attributes.
`abstract String`	`getValue()` Return the literal value of this attribute
`abstract String`	`getValue(FaceletContext ctx)` If literal, then return our value, otherwise delegate to getObject, passing String.class.
`abstract ValueExpression`	`getValueExpression(FaceletContext ctx, Class type)` Create a ValueExpression, using this attribute's literal value and the passed expected type.
`abstract boolean`	`isLiteral()` If this TagAttribute is literal (not #{..} or ${..})
`void`	`setTag(Tag tag)` Set a reference to the Tag for which this class represents the attributes.

Eerste pagina van API Java Inhoudsopgave Haut

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TagAttribute
```
public TagAttribute()
```
- Method Detail
  - getBoolean
```
public abstract boolean getBoolean(FaceletContext ctx)
```
    If literal, return Boolean.getBoolean(java.lang.String) passing our value, otherwise call getObject(FaceletContext, Class).
    
    Parameters:
    
    ctx - FaceletContext to use
    
    Returns:
    
    boolean value
    
    See Also:
    
    Boolean.getBoolean(java.lang.String), getObject(FaceletContext, Class)
  - getInt
```
public abstract int getInt(FaceletContext ctx)
```
    If literal, call Integer.parseInt(String), otherwise call getObject(FaceletContext, Class).
    
    Parameters:
    
    ctx - FaceletContext to use
    
    Returns:
    
    int value
    
    See Also:
    
    Integer.parseInt(java.lang.String), getObject(FaceletContext, Class)
  - getLocalName
```
public abstract String getLocalName()
```
    Local name of this attribute
    
    Returns:
    
    local name of this attribute
  - getLocation
```
public abstract Location getLocation()
```
    The location of this attribute in the FaceletContext
    
    Returns:
    
    the TagAttribute's location
  - getMethodExpression
```
public abstract MethodExpression getMethodExpression(FaceletContext ctx,
                                                     Class type,
                                                     Class[] paramTypes)
```
    Create a MethodExpression, using this attribute's value as the expression String.
    
    Parameters:
    
    ctx - FaceletContext to use
    
    type - expected return type
    
    paramTypes - parameter type
    
    Returns:
    
    a MethodExpression instance
    
    See Also:
    
    ExpressionFactory.createMethodExpression(javax.el.ELContext, java.lang.String, java.lang.Class, java.lang.Class[]), MethodExpression
  - getNamespace
```
public abstract String getNamespace()
```
    The resolved Namespace for this attribute
    
    Returns:
    
    resolved Namespace
  - getObject
```
public abstract Object getObject(FaceletContext ctx)
```
    Delegates to getObject with Object.class as a param
    
    Parameters:
    
    ctx - FaceletContext to use
    
    Returns:
    
    Object representation of this attribute's value
    
    See Also:
    
    getObject(FaceletContext, Class)
  - getQName
```
public abstract String getQName()
```
    The qualified name for this attribute
    
    Returns:
    
    the qualified name for this attribute
  - getValue
```
public abstract String getValue()
```
    Return the literal value of this attribute
    
    Returns:
    
    literal value
  - getValue
```
public abstract String getValue(FaceletContext ctx)
```
    If literal, then return our value, otherwise delegate to getObject, passing String.class.
    
    Parameters:
    
    ctx - FaceletContext to use
    
    Returns:
    
    String value of this attribute
    
    See Also:
    
    getObject(FaceletContext, Class)
  - getObject
```
public abstract Object getObject(FaceletContext ctx,
                                 Class type)
```
    If literal, simply coerce our String literal value using an ExpressionFactory, otherwise create a ValueExpression and evaluate it.
    
    Parameters:
    
    ctx - FaceletContext to use
    
    type - expected return type
    
    Returns:
    
    Object value of this attribute
    
    See Also:
    
    ExpressionFactory.coerceToType(java.lang.Object, java.lang.Class), ExpressionFactory.createValueExpression(javax.el.ELContext, java.lang.String, java.lang.Class), ValueExpression
  - getValueExpression
```
public abstract ValueExpression getValueExpression(FaceletContext ctx,
                                                   Class type)
```
    Create a ValueExpression, using this attribute's literal value and the passed expected type.
    
    Parameters:
    
    ctx - FaceletContext to use
    
    type - expected return type
    
    Returns:
    
    ValueExpression instance
    
    See Also:
    
    ExpressionFactory.createValueExpression(javax.el.ELContext, java.lang.String, java.lang.Class), ValueExpression
  - isLiteral
```
public abstract boolean isLiteral()
```
    If this TagAttribute is literal (not #{..} or ${..})
    
    Returns:
    
    true if this attribute is literal
  - getTag
```
public Tag getTag()
```
    A reference to the Tag for which this class represents the attributes. For compatibility with previous implementations, an implementation is provided that returns null.
    
    Returns:
    
    the Tag for which this class represents the attributes.
    
    Since:
    
    2.2
  - setTag
```
public void setTag(Tag tag)
```
    Set a reference to the Tag for which this class represents the attributes. The VDL runtime must ensure that this method is called before any FaceletHandlers for this element are instantiated. For compatibility with previous implementations, a no-op implementation is provided.
    
    Since:
    
    2.2

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Bij voorbaat dank.

Document heeft de 11/06/2005 gemaakt, de laatste keer de 18/08/2025 gewijzigd
Bron van het afgedrukte document:https://www.gaudry.be/nl/java-api-javaee-rf-javax/faces/view/facelets/tagattribute.html

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Referenties

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Class TagAttribute

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

TagAttribute

Method Detail

getBoolean

getInt

getLocalName

getLocation

getMethodExpression

getNamespace

getObject

getQName

getValue

getValue

getObject

getValueExpression

isLiteral

getTag

setTag

Referenties