com.caucho.el

Class BooleanExpr

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

com.caucho.el.Expr

com.caucho.el.AbstractBooleanExpr

com.caucho.el.BooleanExpr

All Implemented Interfaces:

java.io.Serializable

public class BooleanExpr
extends AbstractBooleanExpr

Represents a binary boolean expression.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.caucho.el.Expr

L, log

Constructor Summary

Constructors

Constructor and Description
BooleanExpr(int op, Expr left, Expr right) Constructs a new Boolean expression.

Method Summary

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

Methods inherited from class com.caucho.el.AbstractBooleanExpr

evalDouble, evalLong, evalString, getValue, print

Methods inherited from class com.caucho.el.Expr

coerceToType, createField, createField, createMethod, error, evalBigDecimal, evalBigInteger, evalCharacter, evalObject, evalPeriod, evalStringWithNull, getExpectedType, getExpressionString, getMethodInfo, getType, hashCode, invocationError, invoke, isDouble, isDoubleString, isLiteralText, isReadOnly, 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

BooleanExpr

public BooleanExpr(int op,
                   Expr left,
                   Expr right)

Constructs a new Boolean expression.

Parameters:

op - the lexeme code for the boolean operation.

left - the left expression

right - the right expression

Method Detail

isConstant

public boolean isConstant()

Returns true if this is a constant expression.

Overrides:

isConstant in class Expr

evalBoolean

public boolean evalBoolean(ELContext env)
                    throws ELException

Evaluate the expression as a boolean.

Specified by:

evalBoolean in class AbstractBooleanExpr

Parameters:

env - the variable environment

Returns:

the result as a boolean

Throws:

ELException

printCreate

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

Prints the Java code to recreate a BooleanExpr

Overrides:

printCreate in class Expr

Parameters:

os - the stream to the *.java page

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