Package com.sun.el.lang

Class ELSupport

java.lang.Object

com.sun.el.lang.ELSupport

Direct Known Subclasses:

SimpleNode

public class ELSupport
extends java.lang.Object

A helper class that implements the EL Specification

Version:

$Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $

Author:

Jacob Hookom [jacob@hookom.net], Kin-man Chung

Constructor Summary

Constructors

Constructor	Description
ELSupport()

Method Summary

Modifier and Type	Method	Description
static void	checkType(java.lang.Object obj, java.lang.Class<?> type)
static java.lang.Boolean	coerceToBoolean(java.lang.Object obj)
static java.lang.Character	coerceToCharacter(java.lang.Object obj)
static java.lang.Enum	coerceToEnum(java.lang.Object obj, java.lang.Class type)
protected static java.lang.Number	coerceToNumber(java.lang.Number number, java.lang.Class type)
static java.lang.Number	coerceToNumber(java.lang.Object obj)
static java.lang.Number	coerceToNumber(java.lang.Object obj, java.lang.Class type)
protected static java.lang.Number	coerceToNumber(java.lang.String val, java.lang.Class type)
static java.lang.String	coerceToString(java.lang.Object obj)
static java.lang.Object	coerceToType(java.lang.Object obj, java.lang.Class<?> type)
static java.lang.Object	coerceToType(java.lang.Object obj, java.lang.Class<?> type, boolean isEL22Compatible)
static int	compare(java.lang.Object obj0, java.lang.Object obj1)
static boolean	containsNulls(java.lang.Object[] obj)
static boolean	equals(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isBigDecimalOp(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isBigIntegerOp(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isDoubleOp(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isDoubleStringOp(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isLongOp(java.lang.Object obj0, java.lang.Object obj1)
static boolean	isStringFloat(java.lang.String str)
static void	throwUnhandled(java.lang.Object base, java.lang.Object property)
static java.lang.Number	toFloat(java.lang.String value)
static java.lang.Number	toNumber(java.lang.String value)

Methods inherited from class java.lang.Object

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

Constructor Detail

ELSupport

public ELSupport()

Method Detail

throwUnhandled

public static final void throwUnhandled(java.lang.Object base,
                                        java.lang.Object property)
                                 throws javax.el.ELException

Throws:

javax.el.ELException

compare

public static final int compare(java.lang.Object obj0,
                                java.lang.Object obj1)
                         throws javax.el.ELException

Parameters:

obj0 - First object to be compared

obj1 - Second object to be compared

Returns:

The result (an int with values -1, 0, or 1) of the comparison

Throws:

EvaluationException

javax.el.ELException

equals

public static final boolean equals(java.lang.Object obj0,
                                   java.lang.Object obj1)
                            throws javax.el.ELException

Parameters:

obj0 - Fisrt object to be compared

obj1 - Second object to be compared

Returns:

true if the objects compared equal

Throws:

EvaluationException

javax.el.ELException

coerceToBoolean

public static final java.lang.Boolean coerceToBoolean(java.lang.Object obj)
                                               throws java.lang.IllegalArgumentException

Parameters:

obj - Object to be coerced

Returns:

The result of coercion

Throws:

java.lang.IllegalArgumentException

coerceToEnum

public static final java.lang.Enum coerceToEnum(java.lang.Object obj,
                                                java.lang.Class type)

coerceToCharacter

public static final java.lang.Character coerceToCharacter(java.lang.Object obj)
                                                   throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToNumber

public static final java.lang.Number coerceToNumber(java.lang.Object obj)

coerceToNumber

protected static final java.lang.Number coerceToNumber(java.lang.Number number,
                                                       java.lang.Class type)
                                                throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToNumber

public static final java.lang.Number coerceToNumber(java.lang.Object obj,
                                                    java.lang.Class type)
                                             throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToNumber

protected static final java.lang.Number coerceToNumber(java.lang.String val,
                                                       java.lang.Class type)
                                                throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToString

public static final java.lang.String coerceToString(java.lang.Object obj)

Parameters:

obj - Object to be coerced

Returns:

The result of coercion

checkType

public static final void checkType(java.lang.Object obj,
                                   java.lang.Class<?> type)
                            throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToType

public static final java.lang.Object coerceToType(java.lang.Object obj,
                                                  java.lang.Class<?> type)
                                           throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

coerceToType

public static final java.lang.Object coerceToType(java.lang.Object obj,
                                                  java.lang.Class<?> type,
                                                  boolean isEL22Compatible)
                                           throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

containsNulls

public static final boolean containsNulls(java.lang.Object[] obj)

Parameters:

obj - An array of objects

Returns:

true if the array contains a null, false otherwise

isBigDecimalOp

public static final boolean isBigDecimalOp(java.lang.Object obj0,
                                           java.lang.Object obj1)

isBigIntegerOp

public static final boolean isBigIntegerOp(java.lang.Object obj0,
                                           java.lang.Object obj1)

isDoubleOp

public static final boolean isDoubleOp(java.lang.Object obj0,
                                       java.lang.Object obj1)

isDoubleStringOp

public static final boolean isDoubleStringOp(java.lang.Object obj0,
                                             java.lang.Object obj1)

isLongOp

public static final boolean isLongOp(java.lang.Object obj0,
                                     java.lang.Object obj1)

isStringFloat

public static final boolean isStringFloat(java.lang.String str)

toFloat

public static final java.lang.Number toFloat(java.lang.String value)

toNumber

public static final java.lang.Number toNumber(java.lang.String value)