de.dante.extex.interpreter.expression.term
Class TBoolean

java.lang.Object
  de.dante.extex.interpreter.expression.term.TBoolean

All Implemented Interfaces:

EType

public class TBoolean

extends java.lang.Object

implements EType

This class encapsulates a boolean value for the use in the expression evaluator.

Version:

$Revision: 1.1 $

Author:

Gerd Neugebauer

TBoolean

public TBoolean()

Creates a new object.

TBoolean

public TBoolean(boolean value)

Creates a new object.

Parameters:

value - the initial value

castTerminal

protected static boolean castTerminal(EType t)
                               throws CastException

Cast a terminal to a double.

Parameters:

t - the terminal to cast

Returns:

the double encountered

Throws:

CastException - in case of an error

add

public EType add(EType t)
          throws UnsupportedException

Description copied from interface: EType

Apply the operation + on the current instance and an additional argument.

Specified by:

add in interface EType

Parameters:

t - the terminal to add

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.add( de.dante.extex.interpreter.expression.EType)

and

public EType and(EType t)
          throws CastException

Description copied from interface: EType

Apply the operation && on the current instance and an additional argument.

Specified by:

and in interface EType

Parameters:

t - the terminal to build the conjunction with

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

See Also:

EType.and( de.dante.extex.interpreter.expression.EType)

divide

public EType divide(EType t)
             throws CastException,
                    UnsupportedException

Description copied from interface: EType

Apply the operation + on the current instance and an additional argument.

Specified by:

divide in interface EType

Parameters:

t - the terminal to divide by

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

See Also:

EType.divide( de.dante.extex.interpreter.expression.EType)

eq

public TBoolean eq(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for equality.

Specified by:

eq in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.eq( de.dante.extex.interpreter.expression.EType)

ge

public TBoolean ge(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for greater or equal.

Specified by:

ge in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.ge( de.dante.extex.interpreter.expression.EType)

gt

public TBoolean gt(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for greater than.

Specified by:

gt in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.gt( de.dante.extex.interpreter.expression.EType)

isValue

public boolean isValue()

Getter for value.

Returns:

the value

le

public TBoolean le(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for less or equal.

Specified by:

le in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.le( de.dante.extex.interpreter.expression.EType)

lt

public TBoolean lt(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for less.

Specified by:

lt in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.lt( de.dante.extex.interpreter.expression.EType)

multiply

public EType multiply(EType t)
               throws CastException,
                      UnsupportedException

Description copied from interface: EType

Apply the operation * on the current instance and an additional argument.

Specified by:

multiply in interface EType

Parameters:

t - the terminal to multiply

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

See Also:

EType.multiply( de.dante.extex.interpreter.expression.EType)

ne

public TBoolean ne(EType t)
            throws UnsupportedException

Description copied from interface: EType

Compare the current instance with an another value for not equal.

Specified by:

ne in interface EType

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.ne( de.dante.extex.interpreter.expression.EType)

negate

public EType negate()
             throws UnsupportedException

Description copied from interface: EType

Apply the unary minus - on the current instance.

Specified by:

negate in interface EType

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.negate()

not

public EType not()
          throws UnsupportedException

Description copied from interface: EType

Apply the unary negation ! on the current instance.

Specified by:

not in interface EType

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.not()

or

public EType or(EType t)
         throws CastException

Description copied from interface: EType

Apply the operation || on the current instance and an additional argument.

Specified by:

or in interface EType

Parameters:

t - the terminal to build the disjunction with

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

See Also:

EType.or( de.dante.extex.interpreter.expression.EType)

parse

public EType parse(java.lang.CharSequence sequence)

See Also:

de.dante.extex.interpreter.expression.EType#parse( java.lang.CharSequence)

set

public EType set(EType t)
          throws CastException

Description copied from interface: EType

Assign a new value from an additional argument. The argument is casted into the proper type.

Specified by:

set in interface EType

Parameters:

t - the terminal to build the conjunction with

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

See Also:

EType.set( de.dante.extex.interpreter.expression.EType)

setValue

public void setValue(boolean value)

Setter for value.

Parameters:

value - the value to set

subtract

public EType subtract(EType t)
               throws UnsupportedException

Description copied from interface: EType

Apply the operation - on the current instance and an additional argument.

Specified by:

subtract in interface EType

Parameters:

t - the terminal to subtract

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

See Also:

EType.subtract( de.dante.extex.interpreter.expression.EType)

toString

public java.lang.String toString()

See Also:

Object.toString()