Package com.blackrook.expression

Class ExpressionVariableContext

java.lang.Object

com.blackrook.expression.ExpressionVariableContext

All Implemented Interfaces:

ExpressionVariableSet

public class ExpressionVariableContext
extends Object
implements ExpressionVariableSet

An open variable set in which values can be set. The internals are written so that the storage uses few memory allocations/deletions.

Author:

Matthew Tropiano

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_CAPACITY	Default capacity.

Constructor Summary

Constructors

Constructor	Description
ExpressionVariableContext()	Creates a context with a default size.
ExpressionVariableContext(int capacity)	Creates a context with a default size.

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the context.
ExpressionValue	get(String name)	Gets a corresponding expression value by name.
boolean	isEmpty()
void	set(String name, boolean value)	Gets a corresponding expression value by name.
void	set(String name, double value)	Gets a corresponding expression value by name.
void	set(String name, long value)	Gets a corresponding expression value by name.
void	set(String name, ExpressionValue value)	Gets a corresponding expression value by name.
int	size()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CAPACITY

public static final int DEFAULT_CAPACITY

Default capacity.

See Also:

Constant Field Values

Constructor Detail

ExpressionVariableContext

public ExpressionVariableContext()

Creates a context with a default size.

See Also:

DEFAULT_CAPACITY

ExpressionVariableContext

public ExpressionVariableContext(int capacity)

Creates a context with a default size.

Parameters:

capacity - the initial capacity.

Method Detail

clear

public void clear()

Clears the context.

get

public ExpressionValue get(String name)

Description copied from interface: ExpressionVariableSet

Gets a corresponding expression value by name.

Specified by:

get in interface ExpressionVariableSet

Parameters:

name - the name of the variable.

Returns:

the value or null if no variable.

set

public void set(String name,
                boolean value)

Gets a corresponding expression value by name.

Parameters:

name - the name of the variable.

value - the value to set.

set

public void set(String name,
                long value)

Gets a corresponding expression value by name.

Parameters:

name - the name of the variable.

value - the value to set.

set

public void set(String name,
                double value)

Gets a corresponding expression value by name.

Parameters:

name - the name of the variable.

value - the value to set.

set

public void set(String name,
                ExpressionValue value)

Gets a corresponding expression value by name.

Parameters:

name - the name of the variable.

value - the value to set.

size

public int size()

Returns:

the amount of variables maintained by this context.

isEmpty

public boolean isEmpty()

Returns:

true if this has no variables, false of not.

toString

public String toString()

Overrides:

toString in class Object