ptolemy.domains.modal.kernel
Class RelationType

java.lang.Object
  ptolemy.domains.modal.kernel.RelationType

public final class RelationType
extends java.lang.Object

A static class contains a list of types for relation node. There are six different types:

 INVALID
 TRUE
 FALSE
 EQUAL_INEQUAL
 LESS_THAN
 GREATER_THAN
 

For a leaf node evaluated as a boolean token, its relationType is decided by the boolean value of the result boolean token: TRUE for true and FALSE for false.

For a relation node, (scalarLeft relationOperator scalarRight), the relationType depends on the relationOperator. If the relationOperator is '==' or '!=', the relationType can be EQUAL_INEQUAL indicating the two scalars equal or not equal; the relation type is LESS_THAN to indicate that the left scalar is less than the right one, and GREATER_THAN to indicate left scalar is bigger than the right one. For the other kinds of relation operators, the relationType is decided by the boolean value of the evaluation result, i.e., TRUE for true and FALSE for false.

The INVALID type is for a relation not evaluated yet.

Since:

Ptolemy II 8.0

Version:

$Id: RelationType.java 57044 2010-01-27 22:41:05Z cxh $

Author:

Haiyang Zheng

Accepted Rating:

Red (hyzheng)

Proposed Rating:

Yellow (hyzheng)

Field Summary

static int	EQUAL_INEQUAL Relation type a relation node that is evaluated to be true while the relation operation is not equal or inequal.
static int	FALSE Relation type a relation node that is evaluated to be fale while the relation operation is not equal or inequal.
static int	GREATER_THAN Relation type a relation node that is evaluated to be false and the left token is greater than the right token, while the relation operation is not equal or inequal.
static int	INVALID Relation type a relation node that is not evaluated.
static int	LESS_THAN Relation type a relation node that is evaluated to be false and the left token is less than the right token, while the relation operation is not equal or inequal.
static int	TRUE Relation type a relation node that is evaluated to be true while the relation operation is not equal or inequal.

Constructor Summary

RelationType()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

INVALID

public static final int INVALID

Relation type a relation node that is not evaluated.

See Also:

Constant Field Values

TRUE

public static final int TRUE

Relation type a relation node that is evaluated to be true while the relation operation is not equal or inequal.

See Also:

Constant Field Values

FALSE

public static final int FALSE

Relation type a relation node that is evaluated to be fale while the relation operation is not equal or inequal.

See Also:

Constant Field Values

EQUAL_INEQUAL

public static final int EQUAL_INEQUAL

Relation type a relation node that is evaluated to be true while the relation operation is not equal or inequal.

See Also:

Constant Field Values

LESS_THAN

public static final int LESS_THAN

Relation type a relation node that is evaluated to be false and the left token is less than the right token, while the relation operation is not equal or inequal.

See Also:

Constant Field Values

GREATER_THAN

public static final int GREATER_THAN

Relation type a relation node that is evaluated to be false and the left token is greater than the right token, while the relation operation is not equal or inequal.

See Also:

Constant Field Values

Constructor Detail

RelationType

public RelationType()