com.caucho.el
Class BooleanExpr

java.lang.Object
  extended by javax.el.Expression
      extended by javax.el.ValueExpression
          extended by com.caucho.el.Expr
              extended by com.caucho.el.AbstractBooleanExpr
                  extended by 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
BooleanExpr(int op, Expr left, Expr right)
          Constructs a new Boolean expression.
 
Method Summary
 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, 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