de.beyondjava.angularFaces.core

Class ELTools

java.lang.Object

de.beyondjava.angularFaces.core.ELTools

public class ELTools
extends Object

Collection of helper methods dealing with the JSF Expression language.

Constructor Summary

Constructors

Constructor and Description
ELTools()

Method Summary

Modifier and Type	Method and Description
static javax.el.ValueExpression	createValueExpression(String p_expression) Caching
static javax.el.ValueExpression	createValueExpression(String p_expression, Class expectedType)
static Object	evalAsObject(String p_expression) Evaluates an EL expression into an object.
static String	evalAsString(String p_expression) Evaluates an EL expression into a string.
static List<String>	getArrayProperties(String p_expression, boolean p_recursive) Returns a list of String denoting every primitively typed property of a certain bean.
static NGBeanAttributeInfo	getBeanAttributeInfos(javax.faces.component.UIComponent c)
static String	getCoreValueExpression(javax.faces.component.UIComponent component)
static List<String>	getEveryProperty(String p_expression, boolean p_recursive) Returns a list of String denoting every primitively typed property of a certain bean.
static String	getNGModel(javax.faces.component.UIComponent p_component)
static Class<?>	getType(String p_expression) Yields the type of the variable given by an expression.
static Class<?>	getType(javax.faces.component.UIComponent p_component) Yields the type of the variable displayed by a component.
static boolean	hasValueExpression(javax.faces.component.UIComponent component)
static Annotation[]	readAnnotations(String p_expression) Which annotations are given to an object described by an EL expression?
static Annotation[]	readAnnotations(javax.faces.component.UIComponent p_component) Which annotations are given to an object displayed by a JSF component?

Methods inherited from class java.lang.Object

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

Constructor Detail

ELTools

public ELTools()

Method Detail

createValueExpression

public static javax.el.ValueExpression createValueExpression(String p_expression)

Caching

createValueExpression

public static javax.el.ValueExpression createValueExpression(String p_expression,
                                                             Class expectedType)

evalAsObject

public static Object evalAsObject(String p_expression)
                           throws javax.el.PropertyNotFoundException

Evaluates an EL expression into an object.

Parameters:

p_expression - the expression

Returns:

the object

Throws:

javax.el.PropertyNotFoundException - if the attribute doesn't exist at all (as opposed to being null)

evalAsString

public static String evalAsString(String p_expression)

Evaluates an EL expression into a string.

Parameters:

p_expression - the el expression

Returns:

the value

getArrayProperties

public static List<String> getArrayProperties(String p_expression,
                                              boolean p_recursive)

Returns a list of String denoting every primitively typed property of a certain bean.

Parameters:

p_expression - The EL expression describing the bean. The EL expression is passed without the leading "#{" and the trailing brace "}".

p_recursive - if true, the list also contains properties of nested beans.

Returns:

a list of strings consisting of EL expressions without the leading "#{" and the trailing brace "}".

getBeanAttributeInfos

public static NGBeanAttributeInfo getBeanAttributeInfos(javax.faces.component.UIComponent c)

getCoreValueExpression

public static String getCoreValueExpression(javax.faces.component.UIComponent component)

getEveryProperty

public static List<String> getEveryProperty(String p_expression,
                                            boolean p_recursive)

Returns a list of String denoting every primitively typed property of a certain bean.

Parameters:

p_expression - The EL expression describing the bean. The EL expression is passed without the leading "#{" and the trailing brace "}".

p_recursive - if true, the list also contains properties of nested beans.

Returns:

a list of strings consisting of EL expressions without the leading "#{" and the trailing brace "}".

getNGModel

public static String getNGModel(javax.faces.component.UIComponent p_component)

getType

public static Class<?> getType(String p_expression)

Yields the type of the variable given by an expression.

Parameters:

p_expression - the expression

Returns:

the type (as class)

getType

public static Class<?> getType(javax.faces.component.UIComponent p_component)

Yields the type of the variable displayed by a component.

Parameters:

p_component - the UIComponent

Returns:

the type (as class)

hasValueExpression

public static boolean hasValueExpression(javax.faces.component.UIComponent component)

readAnnotations

public static Annotation[] readAnnotations(String p_expression)

Which annotations are given to an object described by an EL expression?

Parameters:

p_expression - EL expression of the JSF bean attribute

Returns:

null if there are no annotations, or if they cannot be accessed

readAnnotations

public static Annotation[] readAnnotations(javax.faces.component.UIComponent p_component)

Which annotations are given to an object displayed by a JSF component?

Parameters:

p_component - the component

Returns:

null if there are no annotations, or if they cannot be accessed