javax.faces.view.facelets
Class TagAttribute

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

public abstract class TagAttribute
extends java.lang.Object

Representation of a Tag's attribute in a Facelet File

Version:

$Id: TagAttribute.java,v 1.9 2008/07/13 19:01:35 rlubke Exp $

Author:

Jacob Hookom

Constructor Summary

TagAttribute()

Method Summary

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 java.lang.String	getLocalName() Local name of this attribute
abstract Location	getLocation() The location of this attribute in the FaceletContext
abstract javax.el.MethodExpression	getMethodExpression(FaceletContext ctx, java.lang.Class type, java.lang.Class[] paramTypes) Create a MethodExpression, using this attribute's value as the expression String.
abstract java.lang.String	getNamespace() The resolved Namespace for this attribute
abstract java.lang.Object	getObject(FaceletContext ctx) Delegates to getObject with Object.class as a param
abstract java.lang.Object	getObject(FaceletContext ctx, java.lang.Class type) If literal, simply coerce our String literal value using an ExpressionFactory, otherwise create a ValueExpression and evaluate it.
abstract java.lang.String	getQName() The qualified name for this attribute
abstract java.lang.String	getValue() Return the literal value of this attribute
abstract java.lang.String	getValue(FaceletContext ctx) If literal, then return our value, otherwise delegate to getObject, passing String.class.
abstract javax.el.ValueExpression	getValueExpression(FaceletContext ctx, java.lang.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 ${..})

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 java.lang.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 javax.el.MethodExpression getMethodExpression(FaceletContext ctx,
                                                              java.lang.Class type,
                                                              java.lang.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 java.lang.String getNamespace()

The resolved Namespace for this attribute

Returns:

resolved Namespace

getObject

public abstract java.lang.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)

getObject

public abstract java.lang.Object getObject(FaceletContext ctx,
                                           java.lang.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

getQName

public abstract java.lang.String getQName()

The qualified name for this attribute

Returns:

the qualified name for this attribute

getValue

public abstract java.lang.String getValue()

Return the literal value of this attribute

Returns:

literal value

getValue

public abstract java.lang.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)

getValueExpression

public abstract javax.el.ValueExpression getValueExpression(FaceletContext ctx,
                                                            java.lang.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