Package org.aksw.jenax.graphql.sparql.v2.acc.state.api

Class AccStateBase<I,E,K,V>

java.lang.Object

org.aksw.jenax.graphql.sparql.v2.acc.state.api.AccStateBase<I,E,K,V>

All Implemented Interfaces:

AccState<I,E>, AccStateGon<I,E,K,V>

Direct Known Subclasses:

AccStateArrayInit, AccStateCondition, AccStateInit, AccStateLiteral, AccStateMap, AccStateMemberSet, AccStateTransitionBase, AccStateTypeProduceEntryBase

public abstract class AccStateBase<I,E,K,V>
extends Object
implements AccStateGon<I,E,K,V>

Base class for acc states that produce GON output. Keeps track of the current input being processed.

Field Summary

Fields

Modifier and Type	Field	Description
protected AccContext<K,V>	context
protected I	currentInput	Copy of the input passed to the most recent call of #transition(Object, Object).
protected Object	currentSourceNode
protected boolean	hasBegun
protected Object	oldSourceNode	The materialized value - requires materialization to be enabled in the context
protected AccStateGon<I,E,K,V>	parent
protected I	parentInput
protected boolean	skipOutput
protected Object	stateId

Constructor Summary

Constructors

Constructor	Description
AccStateBase()

Method Summary

Modifier and Type	Method	Description
final void	begin(Object fromStateId, I parentInput, E env, boolean skipOutput)	FIXME What exactly is id? Is it the value by which this acc connects to the parent? The context and skipOutput flag are stored on the accumulator until end is called.
protected void	beginActual()
final void	end()
protected void	endActual()
void	ensureBegun()
AccStateGon<I,E,K,V>	getParent()	The immediate parent of this AccState.
Object	getStateId()	Get the id of the state for which this accumulator is notified.
boolean	hasBegun()
void	setContext(AccContext<K,V> context)	The state to which to backtrack if an input cannot be processed by the current state
protected void	setContextOnChildren(AccContext<K,V> context)
void	setParent(AccStateGon<I,E,K,V> parent)
final AccStateGon<I,E,K,V>	transition(Object inputStateId, I input, E env)	FIXME What exactly is id? Is it the value by which this acc connects to the parent? The context and skipOutput flag are stored on the accumulator until end is called.
abstract AccStateGon<I,E,K,V>	transitionActual(Object inputStateId, I input, E env)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.jenax.graphql.sparql.v2.acc.state.api.AccStateGon

children, getGonType, getRoot

Field Details

parent

protected AccStateGon<I,E,K,V> parent

oldSourceNode

protected Object oldSourceNode

The materialized value - requires materialization to be enabled in the context

hasBegun

protected boolean hasBegun

currentSourceNode

protected Object currentSourceNode

parentInput

protected I parentInput

currentInput

protected I currentInput

Copy of the input passed to the most recent call of #transition(Object, Object).

skipOutput

protected boolean skipOutput

context

protected AccContext<K,V> context

stateId

protected Object stateId

Constructor Details

AccStateBase

public AccStateBase()

Method Details

getStateId

public Object getStateId()

Description copied from interface: AccState

Get the id of the state for which this accumulator is notified.

Specified by:

getStateId in interface AccState<I,E>

setParent

public void setParent(AccStateGon<I,E,K,V> parent)

Specified by:

setParent in interface AccStateGon<I,E,K,V>

setContext

public void setContext(AccContext<K,V> context)

Description copied from interface: AccStateGon

The state to which to backtrack if an input cannot be processed by the current state

Specified by:

setContext in interface AccStateGon<I,E,K,V>

setContextOnChildren

protected void setContextOnChildren(AccContext<K,V> context)

getParent

public AccStateGon<I,E,K,V> getParent()

Description copied from interface: AccStateGon

The immediate parent of this AccState.

Specified by:

getParent in interface AccState<I,E>

Specified by:

getParent in interface AccStateGon<I,E,K,V>

hasBegun

public boolean hasBegun()

Specified by:

hasBegun in interface AccState<I,E>

ensureBegun

public void ensureBegun()

transition

public final AccStateGon<I,E,K,V> transition(Object inputStateId,
 I input,
 E env)
                                      throws IOException

Description copied from interface: AccStateGon

FIXME What exactly is id? Is it the value by which this acc connects to the parent? The context and skipOutput flag are stored on the accumulator until end is called.

Specified by:

transition in interface AccState<I,E>

Specified by:

transition in interface AccStateGon<I,E,K,V>

Parameters:

inputStateId - The stateId, typically extracted from the input by the driver. (Rationale: Only the driver needs to know how to extract the state from an input).

Returns:

Throws:

IOException

begin

public final void begin(Object fromStateId,
 I parentInput,
 E env,
 boolean skipOutput)
                 throws IOException

Description copied from interface: AccState

FIXME What exactly is id? Is it the value by which this acc connects to the parent? The context and skipOutput flag are stored on the accumulator until end is called.

Specified by:

begin in interface AccState<I,E>

Parameters:

joinTuple - The values by which the tuple that is about to be passed to transition joined with the parent accumulator.

cxt -

skipOutput -

Throws:

IOException

end

public final void end()
               throws IOException

Specified by:

end in interface AccState<I,E>

Throws:

IOException

transitionActual

public abstract AccStateGon<I,E,K,V> transitionActual(Object inputStateId,
 I input,
 E env)
                                               throws IOException

Throws:

IOException

beginActual

protected void beginActual()
                    throws IOException

Throws:

IOException

endActual

protected void endActual()
                  throws IOException

Throws:

IOException