Package weka.core.expressionlanguage.common

Class SimpleVariableDeclarations

java.lang.Object

weka.core.expressionlanguage.common.SimpleVariableDeclarations

All Implemented Interfaces:

Serializable, VariableDeclarations

public class SimpleVariableDeclarations
extends Object
implements VariableDeclarations

A set of customizable variable declarations for primitive types.

Version:

$Revision: 1000 $

Author:

Benjamin Weber ( benweber at student dot ethz dot ch )

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SimpleVariableDeclarations.VariableInitializer	A class to initialize variables that have been declared by a SimpleVariableDeclarations class and used inside a program

Constructor Summary

Constructors

Constructor	Description
SimpleVariableDeclarations()

Method Summary

Modifier and Type	Method	Description
void	addBoolean(String name)	Adds a variable declaration for a boolean variable
void	addDouble(String name)	Adds a variable declaration for a double variable
void	addString(String name)	Adds a variable declaration for a string variable
SimpleVariableDeclarations.VariableInitializer	getInitializer()	Returns an object to initialize the declared variables
Node	getVariable(String name)	Tries to fetch a declared variable
boolean	hasVariable(String name)	Whether the variable is declared

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleVariableDeclarations

public SimpleVariableDeclarations()

Method Detail

hasVariable

public boolean hasVariable(String name)

Whether the variable is declared

Specified by:

hasVariable in interface VariableDeclarations

Parameters:

name - name of the variable being queried

Returns:

whether the variable is declared

getVariable

public Node getVariable(String name)

Tries to fetch a declared variable

Specified by:

getVariable in interface VariableDeclarations

Parameters:

name - name of the variable to be fetched

Returns:

an AST (abstrac syntax tree) node representing the variable

addBoolean

public void addBoolean(String name)

Adds a variable declaration for a boolean variable

Requires that the variable hasn't been declared before.

Parameters:

name - the name of the variable

addDouble

public void addDouble(String name)

Adds a variable declaration for a double variable

Requires that the variable hasn't been declared before.

Parameters:

name - the name of the variable

addString

public void addString(String name)

Adds a variable declaration for a string variable

Requires that the variable hasn't been declared before.

Parameters:

name - the name of the variable

getInitializer

public SimpleVariableDeclarations.VariableInitializer getInitializer()

Returns an object to initialize the declared variables

Returns:

an object to initialize the declared variables