com.cc.framework.ui.model.value
Class DeferredValue

java.lang.Object
  com.cc.framework.ui.model.value.DeferredValue

All Implemented Interfaces:

java.io.Serializable

public class DeferredValue

extends java.lang.Object

implements java.io.Serializable

This is the value wrapper class for deferred EL expressions

Version:

$Revision: 1.12 $

Author:

Harald Schulz

See Also:

Serialized Form

Field Summary

private static java.lang.String	EL_DEFERRED_INDICATOR This is the indicator the framework uses to distinguish a deferred EL expression
private static java.lang.String	EL_INDICATOR The standard EL markup
private java.lang.String	expression Expression (-> literal is null)
static DeferredValue	FALSE Boolean literal TRUE
private java.lang.Object	literal Literal value (-> expression is null)
static DeferredValue	NEG Integer literal for -1
private static long	serialVersionUID Serial Version UID
static DeferredValue	TRUE Boolean literal FALSE

Constructor Summary

DeferredValue()
Constructor

DeferredValue(boolean value)
Constructor for an literal boolean value

DeferredValue(int value)
Constructor for an literal int value

DeferredValue(java.lang.Object value)
Constructor for an literal String value

Method Summary

private static java.lang.String	convertEL(java.lang.String deferredExpression) This method converts an expression in the frameworks deferred syntax (with "@{") to a valid EL expression that can be executed by an EL expression Parser.
private java.lang.Object	evaluate(DeferredEnvironment env) Method to evaluate a EL expression
static java.lang.Object	evaluate(java.lang.String value, DeferredEnvironment env) Evaluates the given String value to an object
static java.lang.String	evaluateToString(java.lang.String value, DeferredEnvironment env) Evaluates the given String value to a String object
static DeferredValue	fromLiteral(java.lang.Object value) Creates a literal deferred value
private static boolean	isExpression(java.lang.String value) Checks if the given string is a deferred expression.
static DeferredValue	parseAlignment(java.lang.String value) Parses a Alignment expression
static DeferredValue	parseBoolean(java.lang.String value) Parses a boolean expression
static DeferredValue	parseImage(java.lang.String value) Parses a Image expression
static DeferredValue	parseInt(java.lang.String value) Parses a integer expression
static DeferredValue	parseJoinMode(java.lang.String value) Parses a JoinMode expression
static DeferredValue	parsePermission(java.lang.String value) Parses a Permission expression
AlignmentType	toAlignment(DeferredEnvironment env) Converts the deferred value to a AlignmentType object
static AlignmentType	toAlignment(DeferredValue value, DeferredEnvironment env) Converts the given deferred value to a AlignmentType object
boolean	toBoolean(DeferredEnvironment env) Converts the deferred value to a boolean value
ImageModel	toImage(DeferredEnvironment env) Converts the deferred value to a ImageModel object
static ImageModel	toImage(DeferredValue value, DeferredEnvironment env) Converts the given deferred value to a ImageModel object
int	toInt(DeferredEnvironment env) Converts the deferred value to a integer value
JoinMode	toJoinMode(DeferredEnvironment env) Converts the deferred value to a JoinMode object
static JoinMode	toJoinMode(DeferredValue value, DeferredEnvironment env) Converts the given deferred value to a JoinMode object
Permission	toPermission(DeferredEnvironment env) Converts the deferred value to a Permission object
static Permission	toPermission(DeferredValue value, DeferredEnvironment env) Converts the given deferred value to a Permission object
java.lang.String	toString(DeferredEnvironment env) Converts the deferred value to a String object
static java.lang.String	toString(DeferredValue value, DeferredEnvironment env) Converts the given deferred value to a String object

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

Serial Version UID

See Also:

Constant Field Values

FALSE

public static final DeferredValue FALSE

Boolean literal TRUE

TRUE

public static final DeferredValue TRUE

Boolean literal FALSE

NEG

public static final DeferredValue NEG

Integer literal for -1

EL_DEFERRED_INDICATOR

private static final java.lang.String EL_DEFERRED_INDICATOR

This is the indicator the framework uses to distinguish a deferred EL expression

See Also:

Constant Field Values

EL_INDICATOR

private static final java.lang.String EL_INDICATOR

The standard EL markup

See Also:

Constant Field Values

literal

private java.lang.Object literal

Literal value (-> expression is null)

expression

private java.lang.String expression

Expression (-> literal is null)

Constructor Detail

DeferredValue

public DeferredValue()

Constructor

DeferredValue

public DeferredValue(boolean value)

Constructor for an literal boolean value

Parameters:

value - literal boolean value

DeferredValue

public DeferredValue(int value)

Constructor for an literal int value

Parameters:

value - literal int value

DeferredValue

public DeferredValue(java.lang.Object value)

Constructor for an literal String value

Parameters:

value - literal String value

Method Detail

convertEL

private static java.lang.String convertEL(java.lang.String deferredExpression)

This method converts an expression in the frameworks deferred syntax (with "@{") to a valid EL expression that can be executed by an EL expression Parser.

Parameters:

deferredExpression - The expression in deferred syntax

Returns:

the expression in valid EL syntax

isExpression

private static boolean isExpression(java.lang.String value)

Checks if the given string is a deferred expression. This is the case when the character sequence "@{" or "${" is part of the string

Parameters:

value - string to test

Returns:

returns true if the string is an expression

fromLiteral

public static DeferredValue fromLiteral(java.lang.Object value)

Creates a literal deferred value

Parameters:

value - literal value

Returns:

Deferred value

parseBoolean

public static DeferredValue parseBoolean(java.lang.String value)

Parses a boolean expression

Parameters:

value - string to parse

Returns:

Deferred value

parseInt

public static DeferredValue parseInt(java.lang.String value)

Parses a integer expression

Parameters:

value - string to parse

Returns:

Deferred value

parsePermission

public static DeferredValue parsePermission(java.lang.String value)

Parses a Permission expression

Parameters:

value - string to parse

Returns:

Deferred value

parseImage

public static DeferredValue parseImage(java.lang.String value)

Parses a Image expression

Parameters:

value - string to parse

Returns:

Deferred value

parseAlignment

public static DeferredValue parseAlignment(java.lang.String value)

Parses a Alignment expression

Parameters:

value - string to parse

Returns:

Deferred value

parseJoinMode

public static DeferredValue parseJoinMode(java.lang.String value)

Parses a JoinMode expression

Parameters:

value - string to parse

Returns:

Deferred value

toPermission

public static Permission toPermission(DeferredValue value,
                                      DeferredEnvironment env)

Converts the given deferred value to a Permission object

Parameters:

value - The deferred value to convert or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toImage

public static ImageModel toImage(DeferredValue value,
                                 DeferredEnvironment env)

Converts the given deferred value to a ImageModel object

Parameters:

value - The deferred value to convert or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toAlignment

public static AlignmentType toAlignment(DeferredValue value,
                                        DeferredEnvironment env)

Converts the given deferred value to a AlignmentType object

Parameters:

value - The deferred value to convert or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toJoinMode

public static JoinMode toJoinMode(DeferredValue value,
                                  DeferredEnvironment env)

Converts the given deferred value to a JoinMode object

Parameters:

value - The deferred value to convert or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toString

public static java.lang.String toString(DeferredValue value,
                                        DeferredEnvironment env)

Converts the given deferred value to a String object

Parameters:

value - The deferred value to convert or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

evaluateToString

public static java.lang.String evaluateToString(java.lang.String value,
                                                DeferredEnvironment env)

Evaluates the given String value to a String object

Parameters:

value - The Expression source code or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

evaluate

public static java.lang.Object evaluate(java.lang.String value,
                                        DeferredEnvironment env)

Evaluates the given String value to an object

Parameters:

value - The Expression source code or null

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toString

public java.lang.String toString(DeferredEnvironment env)

Converts the deferred value to a String object

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toImage

public ImageModel toImage(DeferredEnvironment env)

Converts the deferred value to a ImageModel object

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toAlignment

public AlignmentType toAlignment(DeferredEnvironment env)

Converts the deferred value to a AlignmentType object

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toJoinMode

public JoinMode toJoinMode(DeferredEnvironment env)

Converts the deferred value to a JoinMode object

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toPermission

public Permission toPermission(DeferredEnvironment env)

Converts the deferred value to a Permission object

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression or null

toBoolean

public boolean toBoolean(DeferredEnvironment env)

Converts the deferred value to a boolean value

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression

toInt

public int toInt(DeferredEnvironment env)

Converts the deferred value to a integer value

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

Evaluated expression

evaluate

private java.lang.Object evaluate(DeferredEnvironment env)

Method to evaluate a EL expression

Parameters:

env - The expression environment that gives access to the EL Parser an the (row-)bean

Returns:

The Result of the EL evaluation