ptolemy.data.type
Class MatrixType

java.lang.Object
  ptolemy.data.type.StructuredType
      ptolemy.data.type.MatrixType

All Implemented Interfaces:

java.io.Serializable, Type

Direct Known Subclasses:

MatrixType.BooleanMatrixType, MatrixType.ComplexMatrixType, MatrixType.DoubleMatrixType, MatrixType.FixMatrixType, MatrixType.IntMatrixType, MatrixType.LongMatrixType

public class MatrixType
extends StructuredType
implements java.io.Serializable

The base type of matrix token classes. This type functions as a union of the various matrix types. It allows for the creation of arrays that consist of diverse matrix types, because the array type will be {matrix}.

Since:

Ptolemy II 5.2

Version:

$Id: MatrixType.java,v 1.10 2007/12/07 06:31:52 cxh Exp $

Author:

Steve Neuendorffer and Edward A. Lee

See Also:

Serialized Form

Accepted Rating:

Red

Proposed Rating:

Red (yuhong)

Nested Class Summary

static class	MatrixType.BooleanMatrixType The boolean matrix data type.
static class	MatrixType.ComplexMatrixType The complex matrix data type.
static class	MatrixType.DoubleMatrixType The double matrix data type.
static class	MatrixType.FixMatrixType The fix matrix data type.
static class	MatrixType.IntMatrixType The integer matrix data type.
static class	MatrixType.LongMatrixType The long matrix data type.

Field Summary

Fields inherited from class ptolemy.data.type.StructuredType

MAXDEPTHBOUND

Fields inherited from interface ptolemy.data.type.Type

HASH_INVALID, HASH_MAX

Constructor Summary

MatrixType(java.lang.Class c, Type type, java.lang.String name)
Construct a new matrix type that represents matrix tokens of the given class with the given number of rows and columns.

Method Summary

protected int	_compare(StructuredType type) Compare this type with the specified type.
protected StructuredType	_getRepresentative() Return a static instance of this structured type.
protected StructuredType	_greatestLowerBound(StructuredType type) Return the greatest lower bound of this type with the specified type.
protected StructuredType	_leastUpperBound(StructuredType type) Return the least upper bound of this type with the specified type.
java.lang.Object	clone() Return this, that is, return the reference to this object.
Token	convert(Token token) If the argument is an instance of this class or a subclass, then return the token.
boolean	equals(java.lang.Object object) Determine if the argument represents the same MatrixType as this object.
Type	getElementType() Return the type of the elements contained in an instance of this matrix type.
static MatrixType	getMatrixTypeForElementType(Type elementType) Return a matrix type whose element type is the given element type.
java.lang.Class	getTokenClass() Return the class for tokens that this type represents.
int	hashCode() Return a hash code value for this object.
void	initialize(Type type) Set the elements that have declared type BaseType.UNKNOWN to the specified type.
boolean	isAbstract() Return true if the element type is abstract.
boolean	isCompatible(Type type) Test if the argument type is compatible with this type.
boolean	isConstant() Test if this Type is a constant.
boolean	isInstantiable() Return true, indicating that instances of this type can exist.
boolean	isSubstitutionInstance(Type type) Test if the argument is a substitution instance of this type.
java.lang.String	toString() Return the string representation of this type.
void	updateType(StructuredType newType) Update this StructuredType to the specified Structured Type.

Methods inherited from class ptolemy.data.type.StructuredType

add, depth, divide, getTypeHash, modulo, multiply, one, subtract, zero

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MatrixType

public MatrixType(java.lang.Class c,
                  Type type,
                  java.lang.String name)

Construct a new matrix type that represents matrix tokens of the given class with the given number of rows and columns.

Parameters:

c - The token class.

type - The element type.

name - The name.

Method Detail

clone

public java.lang.Object clone()

Return this, that is, return the reference to this object.

Specified by:

clone in interface Type

Specified by:

clone in class StructuredType

Returns:

A MatrixType.

convert

public Token convert(Token token)
              throws IllegalActionException

If the argument is an instance of this class or a subclass, then return the token. Otherwise, throw an exception.

Specified by:

convert in interface Type

Parameters:

token - A token.

Returns:

An instance of this class.

Throws:

IllegalActionException - If the argument is not an instance of this class.

equals

public boolean equals(java.lang.Object object)

Determine if the argument represents the same MatrixType as this object.

Specified by:

equals in interface Type

Overrides:

equals in class java.lang.Object

Parameters:

object - A Type.

Returns:

True if the argument type is a matrix type representing the same class, with the same number of rows and columns.

getElementType

public Type getElementType()

Return the type of the elements contained in an instance of this matrix type. Tokens of the type returned by this method will be returned by the getElementAsToken of matrices that have this type. If this is an instance of this base class rather than the specific matrix types, then return null.

Returns:

The type of the elements.

getMatrixTypeForElementType

public static MatrixType getMatrixTypeForElementType(Type elementType)
                                              throws IllegalActionException

Return a matrix type whose element type is the given element type.

Parameters:

elementType - The type of the element.

Returns:

The matrix type.

Throws:

IllegalActionException - If the elementType is not a type that has a corresponding matrix type.

getTokenClass

public java.lang.Class getTokenClass()

Return the class for tokens that this type represents.

Specified by:

getTokenClass in interface Type

Returns:

A class that represents a matrix token.

hashCode

public int hashCode()

Return a hash code value for this object.

Overrides:

hashCode in class java.lang.Object

Returns:

The hash code for the token class of this type.

initialize

public void initialize(Type type)

Set the elements that have declared type BaseType.UNKNOWN to the specified type.

Specified by:

initialize in class StructuredType

Parameters:

type - A Type.

isAbstract

public boolean isAbstract()

Return true if the element type is abstract.

Specified by:

isAbstract in interface Type

Overrides:

isAbstract in class StructuredType

Returns:

True.

isCompatible

public boolean isCompatible(Type type)

Test if the argument type is compatible with this type. The method returns true if this type is UNKNOWN, since any type is a substitution instance of it. If this type is not UNKNOWN, this method returns true if the argument type is less than or equal to this type in the type lattice, and false otherwise.

Specified by:

isCompatible in interface Type

Parameters:

type - An instance of Type.

Returns:

True if the argument is compatible with this type.

isConstant

public boolean isConstant()

Test if this Type is a constant. A Type is a constant if it does not contain BaseType.UNKNOWN in any level within it.

Specified by:

isConstant in interface Type

Returns:

False.

isInstantiable

public boolean isInstantiable()

Return true, indicating that instances of this type can exist.

Specified by:

isInstantiable in interface Type

Returns:

True.

isSubstitutionInstance

public boolean isSubstitutionInstance(Type type)

Test if the argument is a substitution instance of this type.

Specified by:

isSubstitutionInstance in interface Type

Parameters:

type - A Type.

Returns:

False.

toString

public java.lang.String toString()

Return the string representation of this type.

Specified by:

toString in interface Type

Overrides:

toString in class java.lang.Object

Returns:

A String.

updateType

public void updateType(StructuredType newType)
                throws IllegalActionException

Update this StructuredType to the specified Structured Type. The specified type must have the same structure as this type. This method will only update the component type that is BaseType.UNKNOWN, and leave the constant part of this type intact.

Overrides:

updateType in class StructuredType

Parameters:

newType - A StructuredType.

Throws:

IllegalActionException - If the specified type has a different structure.

_compare

protected int _compare(StructuredType type)

Compare this type with the specified type. The specified type must be of the same structured type, otherwise an exception will be thrown. This method returns one of ptolemy.graph.CPO.LOWER, ptolemy.graph.CPO.SAME, ptolemy.graph.CPO.HIGHER, ptolemy.graph.CPO.INCOMPARABLE, indicating this type is lower than, equal to, higher than, or incomparable with the specified type in the type hierarchy, respectively.

Specified by:

_compare in class StructuredType

Parameters:

type - a StructuredType.

Returns:

An integer.

Throws:

java.lang.IllegalArgumentException - If the specified type is not the same structured type as this one.

_getRepresentative

protected StructuredType _getRepresentative()

Return a static instance of this structured type. The return value is used by TypeLattice to represent this type.

Specified by:

_getRepresentative in class StructuredType

Returns:

a StructuredType.

_greatestLowerBound

protected StructuredType _greatestLowerBound(StructuredType type)

Return the greatest lower bound of this type with the specified type. The specified type must be of the same structured type, otherwise an exception will be thrown.

Specified by:

_greatestLowerBound in class StructuredType

Parameters:

type - a StructuredType.

Returns:

a StructuredType.

Throws:

java.lang.IllegalArgumentException - If the specified type is not the same structured type as this one.

_leastUpperBound

protected StructuredType _leastUpperBound(StructuredType type)

Return the least upper bound of this type with the specified type. The specified type must be of the same structured type, otherwise an exception will be thrown.

Specified by:

_leastUpperBound in class StructuredType

Parameters:

type - a StructuredType.

Returns:

a StructuredType.

Throws:

java.lang.IllegalArgumentException - If the specified type is not the same structured type as this one.