org.hypergraphdb.util

Class VarContext

java.lang.Object

org.hypergraphdb.util.VarContext

public class VarContext
extends Object

This is a glorified name/value map implementing the handling of query variables.

The glory comes from the implementation of a thread-local (and therefore call stack bound) stack of frames.

Author:

Borislav Iordanov

Constructor Summary

Constructors

Constructor and Description
VarContext()

Method Summary

Methods

Modifier and Type	Method and Description
static VarContext	ctx()
<T> Var<T>	get(String name)
<T> T	getGlobalValue(String name)
boolean	isSameVar(Var<?> v1, Var<?> v2)
static VarContext	popFrame()
static VarContext	pushFrame()
static VarContext	pushFrame(VarContext ctx)
<T> void	setGlobalValue(String name, T value)

Methods inherited from class java.lang.Object

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

Constructor Detail

VarContext

public VarContext()

Method Detail

pushFrame

public static VarContext pushFrame()

pushFrame

public static VarContext pushFrame(VarContext ctx)

popFrame

public static VarContext popFrame()

ctx

public static VarContext ctx()

isSameVar

public boolean isSameVar(Var<?> v1,
                Var<?> v2)

get

public <T> Var<T> get(String name)

getGlobalValue

public <T> T getGlobalValue(String name)

setGlobalValue

public <T> void setGlobalValue(String name,
                      T value)