de.dante.extex.interpreter.expression
Interface EType

All Known Implementing Classes:

Accumulator, TBoolean, TCount, TDouble, TGlue

public interface EType

This interface describes the data type of an expression type.

Version:

$Revision: 1.1 $

Author:

Gerd Neugebauer

add

public EType add(EType t)
          throws CastException,
                 UnsupportedException

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

Parameters:

t - the terminal to add

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

and

public EType and(EType t)
          throws CastException,
                 UnsupportedException

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

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

UnsupportedException - in case of an unsupported operation

divide

public EType divide(EType t)
             throws ArithmeticOverflowException,
                    CastException,
                    UnsupportedException

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

Parameters:

t - the terminal to divide by

Returns:

the result of the operation

Throws:

ArithmeticOverflowException - in case of a division by zero

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

eq

public TBoolean eq(EType t)
            throws CastException,
                   UnsupportedException

Compare the current instance with an another value for equality.

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

ge

public TBoolean ge(EType t)
            throws CastException,
                   UnsupportedException

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

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

gt

public TBoolean gt(EType t)
            throws CastException,
                   UnsupportedException

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

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

le

public TBoolean le(EType t)
            throws CastException,
                   UnsupportedException

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

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

lt

public TBoolean lt(EType t)
            throws CastException,
                   UnsupportedException

Compare the current instance with an another value for less.

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

multiply

public EType multiply(EType t)
               throws CastException,
                      UnsupportedException

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

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

ne

public TBoolean ne(EType t)
            throws CastException,
                   UnsupportedException

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

Parameters:

t - the terminal to compare to

Returns:

the result of the comparison

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation

negate

public EType negate()
             throws UnsupportedException

Apply the unary minus - on the current instance.

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

not

public EType not()
          throws UnsupportedException

Apply the unary negation ! on the current instance.

Returns:

the result of the operation

Throws:

UnsupportedException - in case of an unsupported operation

or

public EType or(EType t)
         throws CastException,
                UnsupportedException

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

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

UnsupportedException - in case of an unsupported operation

set

public EType set(EType t)
          throws CastException

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

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

subtract

public EType subtract(EType t)
               throws CastException,
                      UnsupportedException

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

Parameters:

t - the terminal to subtract

Returns:

the result of the operation

Throws:

CastException - in case of an error in casing the argument

UnsupportedException - in case of an unsupported operation