Package com.arcadedb.query.sql.executor

Class BasicCommandContext

java.lang.Object

com.arcadedb.query.sql.executor.BasicCommandContext

All Implemented Interfaces:

CommandContext

public class BasicCommandContext
extends Object
implements CommandContext

Basic implementation of OCommandContext interface that stores variables in a map. Supports parent/child context to build a tree of contexts. If a variable is not found on current object the search is applied recursively on child contexts.

Author:

Luca Garulli (l.garulli--(at)--gmail.com)

Nested Class Summary

Nested classes/interfaces inherited from interface com.arcadedb.query.sql.executor.CommandContext

CommandContext.TIMEOUT_STRATEGY

Field Summary

Fields

Modifier and Type	Field	Description
protected CommandContext	child
protected DatabaseInternal	database
protected Set<String>	declaredScriptVariables
protected Map<String,Object>	inputParameters
protected CommandContext	parent
protected boolean	recordMetrics
protected AtomicLong	resultsProcessed
protected Map<String,Object>	variables

Constructor Summary

Constructors

Constructor	Description
BasicCommandContext()

Method Summary

Modifier and Type	Method	Description
void	beginExecution(long iTimeout, CommandContext.TIMEOUT_STRATEGY iStrategy)
boolean	checkTimeout()	Check if timeout is elapsed, if defined.
CommandContext	copy()	Creates a copy of execution context.
void	declareScriptVariable(String varName)
DatabaseInternal	getDatabase()
static int	getHigherIndexOf(String iText, int iBeginOffset, String... iToSearch)
Map<String,Object>	getInputParameters()
static int	getLowerIndexOf(String iText, int iBeginOffset, String... iToSearch)
CommandContext	getParent()
AtomicLong	getResultsProcessed()	Returns the number of results processed.
Object	getVariable(String iName)
Object	getVariable(String iName, Object iDefault)
protected Object	getVariableFromParentHierarchy(String varName)
Map<String,Object>	getVariables()	Returns a read-only map with all the variables.
CommandContext	incrementVariable(String iName)
boolean	isRecordingMetrics()
boolean	isScriptVariableDeclared(String varName)
CommandContext	setChild(CommandContext iContext)	Set the inherited context avoid to copying all the values every time.
void	setDatabase(Database database)
void	setInputParameters(Object[] args)
void	setInputParameters(Map<String,Object> inputParameters)
CommandContext	setParent(CommandContext iParentContext)
CommandContext	setParentWithoutOverridingChild(CommandContext iParentContext)
CommandContext	setRecordingMetrics(boolean recordMetrics)
CommandContext	setVariable(String iName, Object iValue)
String	toString()
long	updateMetric(String iName, long iValue)	Updates a counter.

Methods inherited from class java.lang.Object

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

Field Detail

database

protected DatabaseInternal database

recordMetrics

protected boolean recordMetrics

parent

protected CommandContext parent

child

protected CommandContext child

variables

protected Map<String,Object> variables

inputParameters

protected Map<String,Object> inputParameters

declaredScriptVariables

protected Set<String> declaredScriptVariables

resultsProcessed

protected final AtomicLong resultsProcessed

Constructor Detail

BasicCommandContext

public BasicCommandContext()

Method Detail

getVariable

public Object getVariable(String iName)

Specified by:

getVariable in interface CommandContext

getVariable

public Object getVariable(String iName,
                          Object iDefault)

Specified by:

getVariable in interface CommandContext

getVariableFromParentHierarchy

protected Object getVariableFromParentHierarchy(String varName)

setVariable

public CommandContext setVariable(String iName,
                                  Object iValue)

Specified by:

setVariable in interface CommandContext

incrementVariable

public CommandContext incrementVariable(String iName)

Specified by:

incrementVariable in interface CommandContext

updateMetric

public long updateMetric(String iName,
                         long iValue)

Description copied from interface: CommandContext

Updates a counter. Used to record metrics.

Specified by:

updateMetric in interface CommandContext

Parameters:

iName - Metric's name

iValue - delta to add or subtract

Returns:

getVariables

public Map<String,Object> getVariables()

Returns a read-only map with all the variables.

Specified by:

getVariables in interface CommandContext

setChild

public CommandContext setChild(CommandContext iContext)

Set the inherited context avoid to copying all the values every time.

Specified by:

setChild in interface CommandContext

getParent

public CommandContext getParent()

Specified by:

getParent in interface CommandContext

setParent

public CommandContext setParent(CommandContext iParentContext)

Specified by:

setParent in interface CommandContext

setParentWithoutOverridingChild

public CommandContext setParentWithoutOverridingChild(CommandContext iParentContext)

toString

public String toString()

Overrides:

toString in class Object

isRecordingMetrics

public boolean isRecordingMetrics()

Specified by:

isRecordingMetrics in interface CommandContext

setRecordingMetrics

public CommandContext setRecordingMetrics(boolean recordMetrics)

Specified by:

setRecordingMetrics in interface CommandContext

beginExecution

public void beginExecution(long iTimeout,
                           CommandContext.TIMEOUT_STRATEGY iStrategy)

Specified by:

beginExecution in interface CommandContext

checkTimeout

public boolean checkTimeout()

Description copied from interface: CommandContext

Check if timeout is elapsed, if defined.

Specified by:

checkTimeout in interface CommandContext

Returns:

false if it the timeout is elapsed and strategy is "return" if the strategy is "exception" (default)

copy

public CommandContext copy()

Description copied from interface: CommandContext

Creates a copy of execution context.

Specified by:

copy in interface CommandContext

getInputParameters

public Map<String,Object> getInputParameters()

Specified by:

getInputParameters in interface CommandContext

setInputParameters

public void setInputParameters(Map<String,Object> inputParameters)

Specified by:

setInputParameters in interface CommandContext

setInputParameters

public void setInputParameters(Object[] args)

getResultsProcessed

public AtomicLong getResultsProcessed()

Returns the number of results processed. This is intended to be used with LIMIT in SQL statements

getDatabase

public DatabaseInternal getDatabase()

Specified by:

getDatabase in interface CommandContext

setDatabase

public void setDatabase(Database database)

getLowerIndexOf

public static int getLowerIndexOf(String iText,
                                  int iBeginOffset,
                                  String... iToSearch)

getHigherIndexOf

public static int getHigherIndexOf(String iText,
                                   int iBeginOffset,
                                   String... iToSearch)

declareScriptVariable

public void declareScriptVariable(String varName)

Specified by:

declareScriptVariable in interface CommandContext

isScriptVariableDeclared

public boolean isScriptVariableDeclared(String varName)

Specified by:

isScriptVariableDeclared in interface CommandContext