com.caucho.el
Class UnaryExpr

java.lang.Object
  extended by javax.el.Expression
      extended by javax.el.ValueExpression
          extended by com.caucho.el.Expr
              extended by com.caucho.el.UnaryExpr
All Implemented Interfaces:
java.io.Serializable

public class UnaryExpr
extends Expr

Represents a unary expression.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class com.caucho.el.Expr
L, log
 
Method Summary
static Expr create(int op, Expr expr)
           
 boolean equals(java.lang.Object o)
          Returns true for equal strings.
 boolean evalBoolean(ELContext env)
          Evaluate the expression as a boolean.
 double evalDouble(ELContext env)
          Evaluate the expression as a double
 long evalLong(ELContext env)
          Evaluate the expression as a long
 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 UnaryExpr.
 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, evalCharacter, 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, 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
 

Method Detail

create

public static Expr create(int op,
                          Expr expr)

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 resolver
Returns:
the value as an object
Throws:
ELException

evalBoolean

public boolean evalBoolean(ELContext env)
                    throws ELException
Evaluate the expression as a boolean.

Overrides:
evalBoolean in class Expr
Parameters:
env - the variable resolver
Returns:
the value as a boolean
Throws:
ELException

evalLong

public long evalLong(ELContext env)
              throws ELException
Evaluate the expression as a long

Overrides:
evalLong in class Expr
Parameters:
env - the variable resolver
Returns:
the value as a long
Throws:
ELException

evalDouble

public double evalDouble(ELContext env)
                  throws ELException
Evaluate the expression as a double

Overrides:
evalDouble in class Expr
Parameters:
env - the variable environment
Returns:
the value of the expression as a double
Throws:
ELException

printCreate

public void printCreate(WriteStream os)
                 throws java.io.IOException
Prints the Java code to recreate the UnaryExpr.

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