com.caucho.el

Class ConditionalNullExpr

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

com.caucho.el.Expr

com.caucho.el.ConditionalNullExpr

All Implemented Interfaces:

java.io.Serializable

public class ConditionalNullExpr
extends Expr

Represents a conditional expression

See Also:

Serialized Form

Field Summary

Fields inherited from class com.caucho.el.Expr

L, log

Constructor Summary

Constructors

Constructor and Description
ConditionalNullExpr(Expr value, Expr defaultExpr) Creates the conditional expression.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Returns true for equal strings.
java.lang.Object	getValue(ELContext env) Evaluate the expression as an object.
boolean	isConstant() Returns true if this is a constant expression.
void	printCreate(WriteStream os) Prints the Java code to recreate the expr
java.lang.String	toString() Returns a readable representation of the expr.

Methods inherited from class com.caucho.el.Expr

coerceToType, createField, createField, createMethod, error, evalBigDecimal, evalBigInteger, evalBoolean, evalCharacter, evalDouble, evalLong, evalObject, evalPeriod, evalString, evalStringWithNull, getExpectedType, getExpressionString, getMethodInfo, getType, hashCode, invocationError, invoke, isDouble, isDoubleString, isLiteralText, isReadOnly, print, print, printEscaped, printEscapedString, setProperty, setValue, toBigDecimal, toBigInteger, toBoolean, toCharacter, toClass, toDouble, toEnum, toLong, toStream, toStream, toStream, toStreamEscaped, toStreamEscaped, toStreamEscaped, toString, toString, toString, toString, toString, toStringWithNull

Methods inherited from class javax.el.ValueExpression

getValueReference

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ConditionalNullExpr

public ConditionalNullExpr(Expr value,
                           Expr defaultExpr)

Creates the conditional expression.

Parameters:

test - the conditional expressions test.

trueExpr - the true subexpression

falseExpr - the false subexpression

Method Detail

isConstant

public boolean isConstant()

Returns true if this is a constant expression.

Overrides:

isConstant in class Expr

getValue

public java.lang.Object getValue(ELContext env)
                          throws ELException

Evaluate the expression as an object.

Specified by:

getValue in class Expr

Parameters:

env - the variable environment

Returns:

the result as an object

Throws:

ELException

printCreate

public void printCreate(WriteStream os)
                 throws java.io.IOException

Prints the Java code to recreate the expr

Overrides:

printCreate in class Expr

Parameters:

os - the output stream to the *.java file

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object o)

Returns true for equal strings.

Overrides:

equals in class Expr

toString

public java.lang.String toString()

Returns a readable representation of the expr.

Specified by:

toString in class Expr