org.jruby.runtime.ivars

Class VariableAccessorField

java.lang.Object

org.jruby.runtime.ivars.VariableAccessorField

public final class VariableAccessorField
extends java.lang.Object

A lazy mechanism for accessing VariableAccessors for a given variable name.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	name the name of the variable
private VariableAccessor	variableAccessor the accessor cached after it has been allocated

Constructor Summary

Constructors

Constructor and Description
VariableAccessorField(java.lang.String name) Construct a new VariableAccessorField for the given named variable.

Method Summary

Modifier and Type	Method and Description
private VariableAccessor	allocateVariableAccessor(VariableTableManager tableMgr) Retrieve or allocate the variable accessor for this variable.
VariableAccessor	getVariableAccessorForRead() Retrieve the variable accessor for read.
VariableAccessor	getVariableAccessorForWrite(VariableTableManager tableMgr) Retrieve the variable access for write.

Methods inherited from class java.lang.Object

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

Field Detail

name

private final java.lang.String name

the name of the variable

variableAccessor

private volatile VariableAccessor variableAccessor

the accessor cached after it has been allocated

Constructor Detail

VariableAccessorField

public VariableAccessorField(java.lang.String name)

Construct a new VariableAccessorField for the given named variable.

Parameters:

name - the name of the variable

Method Detail

getVariableAccessorForRead

public VariableAccessor getVariableAccessorForRead()

Retrieve the variable accessor for read.

Returns:

the variable accessor appropriate for reads

getVariableAccessorForWrite

public VariableAccessor getVariableAccessorForWrite(VariableTableManager tableMgr)

Retrieve the variable access for write.

Parameters:

tableMgr - the VariableTableManager for which to allocate an accessor, if it has not already been allocated.

Returns:

the variable accessor appropriate for writes.

allocateVariableAccessor

private VariableAccessor allocateVariableAccessor(VariableTableManager tableMgr)

Retrieve or allocate the variable accessor for this variable. This version differs from getVariableAccessorForWrite only in its visibility and the fact that it is synchronized against this field to ensure volatile behavior of the variableAccessor field.

Parameters:

tableMgr - the VariableTableManager for which to allocate an accessor, if it has not already been allocated.

Returns:

the variable accessor appropriate for writes