Package com.sun.el.lang

Class ELSupport

java.lang.Object

com.sun.el.lang.ELSupport

Direct Known Subclasses:

SimpleNode

public class ELSupport
extends Object

A helper class that implements the Jakarta Expression Specification

Version:

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

Field Summary

Fields

Modifier and Type	Field	Description
private static final Long	ZERO

Constructor Summary

Constructors

Constructor	Description
ELSupport()

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Details

ZERO

private static final Long ZERO

Constructor Details

ELSupport

public ELSupport()

Method Details

throwUnhandled

public static final void throwUnhandled(Object base,
 Object property)
                                 throws ELException

Throws:

ELException

compare

public static final int compare(Object obj0,
 Object obj1)
                         throws 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:

ELException - when something goes wrong

equals

public static final boolean equals(Object obj0,
 Object obj1)
                            throws ELException

Parameters:

obj0 - Fisrt object to be compared

obj1 - Second object to be compared

Returns:

true if the objects compared equal

Throws:

ELException - when something goes wrong

coerceToBoolean

public static final Boolean coerceToBoolean(Object obj)
                                     throws IllegalArgumentException

Parameters:

obj - Object to be coerced

Returns:

The result of coercion

Throws:

IllegalArgumentException

coerceToEnum

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

coerceToCharacter

public static final Character coerceToCharacter(Object obj)
                                         throws IllegalArgumentException

Throws:

IllegalArgumentException

coerceToNumber

public static final Number coerceToNumber(Object obj)

coerceToNumber

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

Throws:

IllegalArgumentException

coerceToNumber

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

Throws:

IllegalArgumentException

coerceToNumber

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

Throws:

IllegalArgumentException

coerceToString

public static final String coerceToString(Object obj)

Parameters:

obj - Object to be coerced

Returns:

The result of coercion

checkType

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

Throws:

IllegalArgumentException

coerceToType

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

Throws:

IllegalArgumentException

coerceToType

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

Throws:

IllegalArgumentException

containsNulls

public static final boolean containsNulls(Object[] obj)

Parameters:

obj - An array of objects

Returns:

true if the array contains a null, false otherwise

isBigDecimalOp

public static final boolean isBigDecimalOp(Object obj0,
 Object obj1)

isBigIntegerOp

public static final boolean isBigIntegerOp(Object obj0,
 Object obj1)

isDoubleOp

public static final boolean isDoubleOp(Object obj0,
 Object obj1)

isDoubleStringOp

public static final boolean isDoubleStringOp(Object obj0,
 Object obj1)

isLongOp

public static final boolean isLongOp(Object obj0,
 Object obj1)

isStringFloat

public static final boolean isStringFloat(String str)

toFloat

public static final Number toFloat(String value)

toNumber

public static final Number toNumber(String value)