org.apache.commons.jexl2
Class JexlEngine.Scope

java.lang.Object
  org.apache.commons.jexl2.JexlEngine.Scope

Enclosing class:

JexlEngine

public static final class JexlEngine.Scope
extends Object

A script scope, stores the declaration of parameters and local variables.

Since:

2.1

Constructor Summary

JexlEngine.Scope(String... parameters)
Creates a new scope with a list of parameters.

Method Summary

JexlEngine.Frame	createFrame(Object... values) Creates a frame by copying values up to the number of parameters.
Integer	declareVariable(String name) Declares a local variable.
boolean	equals(JexlEngine.Scope frame) Whether this frame is equal to another.
boolean	equals(Object o)
int	getArgCount() Gets the (maximum) number of arguments this script expects.
String[]	getLocalVariables() Gets this script local variable, i.e.
String[]	getParameters() Gets this script parameters, i.e.
Integer	getRegister(String name) Checks whether an identifier is a local variable or argument, ie stored in a register.
String[]	getRegisters() Gets this script registers, i.e.
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

JexlEngine.Scope

public JexlEngine.Scope(String... parameters)

Creates a new scope with a list of parameters.

Parameters:

parameters - the list of parameters

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

equals

public boolean equals(JexlEngine.Scope frame)

Whether this frame is equal to another.

Parameters:

frame - the frame to compare to

Returns:

true if equal, false otherwise

getRegister

public Integer getRegister(String name)

Checks whether an identifier is a local variable or argument, ie stored in a register.

Parameters:

name - the register name

Returns:

the register index

declareVariable

public Integer declareVariable(String name)

Declares a local variable.

This method creates an new entry in the named register map.

Parameters:

name - the variable name

Returns:

the register index storing this variable

createFrame

public JexlEngine.Frame createFrame(Object... values)

Creates a frame by copying values up to the number of parameters.

Parameters:

values - the argument values

Returns:

the arguments array

getArgCount

public int getArgCount()

Gets the (maximum) number of arguments this script expects.

Returns:

the number of parameters

getRegisters

public String[] getRegisters()

Gets this script registers, i.e. parameters and local variables.

Returns:

the register names

getParameters

public String[] getParameters()

Gets this script parameters, i.e. registers assigned before creating local variables.

Returns:

the parameter names

getLocalVariables

public String[] getLocalVariables()

Gets this script local variable, i.e. registers assigned to local variables.

Returns:

the parameter names