Package org.opensourcephysics.ejs.control.value

Class Value

java.lang.Object

org.opensourcephysics.ejs.control.value.Value

Direct Known Subclasses:

BooleanValue, DoubleValue, ExpressionValue, IntegerValue, InterpretedValue, ObjectValue, StringValue

public abstract class Value
extends Object

A Value is an object that holds an internal (but public) variable. This abstract class provides a unified way of acessing the variable value. The fact the variable is public permits quick access to it.

When using subclasses, it is a good idea to directly access the internal variable or use the correct 'get' method in order to increase speed.

Using Number is not suitable for two reasons:

Number does not include Strings and Objects

Number does not allow direct access to the internal variable

See Also:

• Number

Field Summary

Fields

Modifier and Type	Field	Description
protected int	type
static final int	TYPE_BOOLEAN
static final int	TYPE_DOUBLE
static final int	TYPE_EXPRESSION
static final int	TYPE_INTEGER
static final int	TYPE_OBJECT
static final int	TYPE_STRING
static final BooleanValue	VALUE_FALSE
static final ObjectValue	VALUE_NULL
static final BooleanValue	VALUE_TRUE

Method Summary

Modifier and Type	Method	Description
Value	cloneValue()	Clones one value into another
void	copyValue(Value _source)	Copies one value into another
abstract boolean	getBoolean()	Returns the value of the variable as a boolean
abstract double	getDouble()	Returns the value of the variable as a double
abstract int	getInteger()	Returns the value of the variable as an int
abstract Object	getObject()	Returns the value of the variable as an Object.
abstract String	getString()	Returns the value of the variable as a String
int	getType()
static Value	parseConstant(String _input, boolean _silentMode)	revised for efficiency - BH
static Value	parseConstantOrArray(String _input, boolean _silentMode)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

TYPE_OBJECT

public static final int TYPE_OBJECT

See Also:

• Constant Field Values

TYPE_BOOLEAN

public static final int TYPE_BOOLEAN

See Also:

• Constant Field Values

TYPE_DOUBLE

public static final int TYPE_DOUBLE

See Also:

• Constant Field Values

TYPE_EXPRESSION

public static final int TYPE_EXPRESSION

See Also:

• Constant Field Values

TYPE_INTEGER

public static final int TYPE_INTEGER

See Also:

• Constant Field Values

TYPE_STRING

public static final int TYPE_STRING

See Also:

• Constant Field Values

VALUE_NULL

public static final ObjectValue VALUE_NULL

VALUE_FALSE

public static final BooleanValue VALUE_FALSE

VALUE_TRUE

public static final BooleanValue VALUE_TRUE

type

protected int type

Method Details

getType

public int getType()

getBoolean

public abstract boolean getBoolean()

Returns the value of the variable as a boolean

getInteger

public abstract int getInteger()

Returns the value of the variable as an int

getDouble

public abstract double getDouble()

Returns the value of the variable as a double

getString

public abstract String getString()

Returns the value of the variable as a String

getObject

public abstract Object getObject()

Returns the value of the variable as an Object. Ideal for arrays!

copyValue

public void copyValue(Value _source)

Copies one value into another

cloneValue

public Value cloneValue()

Clones one value into another

toString

public String toString()

Overrides:

toString in class Object

parseConstantOrArray

public static Value parseConstantOrArray(String _input,
 boolean _silentMode)

parseConstant

public static Value parseConstant(String _input,
 boolean _silentMode)

revised for efficiency - BH