org.foray.fotree.value
Class Expr

java.lang.Object
  org.foray.fotree.value.Expr

All Implemented Interfaces:

PropertyValue

Direct Known Subclasses:

ExprAdditive

public abstract class Expr
extends Object
implements PropertyValue

Abstract Base Class for all Expressions.

Field Summary

static byte	OPERATION_ADD Constant indicating an add operation.
static byte	OPERATION_DIVIDE Constant indicating a division operation.
static byte	OPERATION_MOD Constant indicating a modulo or remainder operation.
static byte	OPERATION_MULTIPLY Constant indicating a multiplication operation.
static byte	OPERATION_NEGATION Constant indicating a negation operation.
static byte	OPERATION_SUBTRACT Constant indicating a subtract operation.
static byte	UNIT_POWER_AREA Constant indicating a two-dimensional item in space, that is, an area.
static byte	UNIT_POWER_LENGTH Constant indicating a one-dimensional item in space, that is, a length.
static byte	UNIT_POWER_NON_NUMERIC Constant indicating an invalid unit power, that is, a non-numeric item.
static byte	UNIT_POWER_NUMERIC Constant indicating a numeric item, but one that has zero dimensions.

Constructor Summary

Expr()

Method Summary

IllegalStateException	evalColorException() Standard exception when trying to evaluate to a Color for a value that cannot do so.
IllegalStateException	evalIntegerException() Standard exception when trying to evaluate to an Integer for a value that cannot do so.
IllegalStateException	evalKeywordException() Standard exception when trying to evaluate to a Keyword for a value that cannot do so.
IllegalStateException	evalLengthException() Standard exception when trying to evaluate to a Length for a value that cannot do so.
IllegalStateException	evalNumericException() Standard exception when trying to evaluate to a Numeric for a value that cannot do so.
IllegalStateException	evalPercentageException() Standard exception when trying to evaluate to a Percentage for a value that cannot do so.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.foray.fotree.value.PropertyValue

canEvalColor, canEvalInteger, canEvalKeyword, canEvalLength, canEvalNumeric, canEvalPercentage, evalColor, evalInteger, evalKeyword, evalLength, evalNumeric, evalPercentage, getUnitPower, lengthRequiresFontSize

Field Detail

UNIT_POWER_NON_NUMERIC

public static final byte UNIT_POWER_NON_NUMERIC

Constant indicating an invalid unit power, that is, a non-numeric item.

See Also:

Constant Field Values

UNIT_POWER_NUMERIC

public static final byte UNIT_POWER_NUMERIC

Constant indicating a numeric item, but one that has zero dimensions.

See Also:

Constant Field Values

UNIT_POWER_LENGTH

public static final byte UNIT_POWER_LENGTH

Constant indicating a one-dimensional item in space, that is, a length.

See Also:

Constant Field Values

UNIT_POWER_AREA

public static final byte UNIT_POWER_AREA

Constant indicating a two-dimensional item in space, that is, an area.

See Also:

Constant Field Values

OPERATION_ADD

public static final byte OPERATION_ADD

Constant indicating an add operation.

See Also:

Constant Field Values

OPERATION_SUBTRACT

public static final byte OPERATION_SUBTRACT

Constant indicating a subtract operation.

See Also:

Constant Field Values

OPERATION_MULTIPLY

public static final byte OPERATION_MULTIPLY

Constant indicating a multiplication operation.

See Also:

Constant Field Values

OPERATION_DIVIDE

public static final byte OPERATION_DIVIDE

Constant indicating a division operation.

See Also:

Constant Field Values

OPERATION_MOD

public static final byte OPERATION_MOD

Constant indicating a modulo or remainder operation.

See Also:

Constant Field Values

OPERATION_NEGATION

public static final byte OPERATION_NEGATION

Constant indicating a negation operation.

See Also:

Constant Field Values

Constructor Detail

Expr

public Expr()

Method Detail

evalNumericException

public IllegalStateException evalNumericException()

Standard exception when trying to evaluate to a Numeric for a value that cannot do so.

Returns:

An appropriate Exception.

evalColorException

public IllegalStateException evalColorException()

Standard exception when trying to evaluate to a Color for a value that cannot do so.

Returns:

An appropriate Exception.

evalLengthException

public IllegalStateException evalLengthException()

Standard exception when trying to evaluate to a Length for a value that cannot do so.

Returns:

An appropriate Exception.

evalIntegerException

public IllegalStateException evalIntegerException()

Standard exception when trying to evaluate to an Integer for a value that cannot do so.

Returns:

An appropriate Exception.

evalKeywordException

public IllegalStateException evalKeywordException()

Standard exception when trying to evaluate to a Keyword for a value that cannot do so.

Returns:

An appropriate Exception.

evalPercentageException

public IllegalStateException evalPercentageException()

Standard exception when trying to evaluate to a Percentage for a value that cannot do so.

Returns:

An appropriate Exception.