blog
Class BuiltInTypes

java.lang.Object
  blog.BuiltInTypes

public class BuiltInTypes
extends java.lang.Object

Class with static methods and variables for dealing with the built-in types that exist in every BLOG model. These include Boolean, Real, Integer, NaturalNum, String, Character and types RmxnMatrix and RnVector for positive integers m, n.

Field Summary

static Type	BOOLEAN Type for the Boolean values "true" and "false".
static Type	BUILT_IN Supertype for all built-in types.
static Type	CHARACTER Type for individual unicode characters.
static Type	INTEGER Type for integers.
static Type	NATURAL_NUM Type for natural numbers.
static Type	NULL Type for the built-in constant "null".
static Type	REAL Type for real numbers.
static Type	RMATRIX Supertype for real matrices.
static Type	RVECTOR Supertype for real vectors, which are matrices with one column.
static Type	STRING Type for finite strings of Unicode characters.
static Type	TIMESTEP Type for timesteps.

Method Summary

static boolean	exists(java.lang.String name) Returns true if there is a built-in type with the given name.
static Type	getType(java.lang.String name) Returns the built-in type with the given name, or null if there is no such built-in type.

Methods inherited from class java.lang.Object

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

Field Detail

BUILT_IN

public static final Type BUILT_IN

Supertype for all built-in types. Used to determine whether a type is built in or not.

NULL

public static final Type NULL

Type for the built-in constant "null". A term of any type except BOOLEAN can have the same denotation as "null", so we treat this special type as being a subtype of every type except BOOLEAN.

BOOLEAN

public static final Type BOOLEAN

Type for the Boolean values "true" and "false". Objects of this type are represented as java.lang.Boolean objects.

RMATRIX

public static final Type RMATRIX

Supertype for real matrices. Specific matrix types have names of the form RmxnMatrix for non-zero integers m and n; those types are created lazily as needed. Names of the form Rmx1Matrix are aliases for RmVector.

Objects of this type are represented as Jama.Matrix objects.

RVECTOR

public static final Type RVECTOR

Supertype for real vectors, which are matrices with one column. Specific vector types have names of the form RnVector; those types are created lazily as needed.

Objects of this type are represented as Jama.Matrix objects.

REAL

public static final Type REAL

Type for real numbers. Objects of this type are represented as java.lang.Number objects.

INTEGER

public static final Type INTEGER

Type for integers. This is a subtype of the real numbers. Objects of this type are represented as java.lang.Integer objects.

NATURAL_NUM

public static final Type NATURAL_NUM

Type for natural numbers. This is a subtype of the integers. Objects of this type are represented as java.lang.Integer objects.

STRING

public static final Type STRING

Type for finite strings of Unicode characters. Objects of this type are represented as java.lang.String objects.

CHARACTER

public static final Type CHARACTER

Type for individual unicode characters. Objects of this type are represented as java.lang.Character objects.

TIMESTEP

public static Type TIMESTEP

Type for timesteps. Objects of this type are represented as Timestep objects, which extend Number (but not Integer, because Integer is final).

Method Detail

getType

public static Type getType(java.lang.String name)

Returns the built-in type with the given name, or null if there is no such built-in type.

exists

public static boolean exists(java.lang.String name)

Returns true if there is a built-in type with the given name.