com.orientechnologies.orient.core.sql.executor

Class CheckClassTypeStep

java.lang.Object

com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

com.orientechnologies.orient.core.sql.executor.CheckClassTypeStep

All Implemented Interfaces:

OExecutionStep, OExecutionStepInternal

public class CheckClassTypeStep
extends AbstractExecutionStep

This step is used just as a gate check for classes (eg. for CREATE VERTEX to make sure that the passed class is a vertex class).

It accepts two values: a target class and a parent class. If the two classes are the same or if the parent class is indeed a parent class of the target class, then the syncPool() returns an empty result set, otherwise it throws an OCommandExecutionException

Author:

Luigi Dell'Aquila (luigi.dellaquila - at - orientdb.com)

Field Summary

Fields inherited from class com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

ctx, next, prev, profilingEnabled, timedOut

Constructor Summary

Constructors

Constructor and Description
CheckClassTypeStep(String targetClass, String parentClass, OCommandContext ctx, boolean profilingEnabled)

Method Summary

Modifier and Type	Method and Description
boolean	canBeCached()
OExecutionStep	copy(OCommandContext ctx)
long	getCost() returns the absolute cost (in nanoseconds) of the execution of this step
String	prettyPrint(int depth, int indent)
OResultSet	syncPull(OCommandContext ctx, int nRecords)

Methods inherited from class com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

close, getContext, getCostFormatted, getNext, getPrev, isProfilingEnabled, sendTimeout, setNext, setPrevious, setProfilingEnabled

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.orientechnologies.orient.core.sql.executor.OExecutionStepInternal

basicDeserialize, basicSerialize, deserialize, getDescription, getIndent, getName, getSubExecutionPlans, getSubSteps, getTargetNode, getType, reset, serialize

Methods inherited from interface com.orientechnologies.orient.core.sql.executor.OExecutionStep

toResult

Constructor Detail

CheckClassTypeStep

public CheckClassTypeStep(String targetClass,
                          String parentClass,
                          OCommandContext ctx,
                          boolean profilingEnabled)

Parameters:

targetClass - a class to be checked

parentClass - a class that is supposed to be the same or a parent class of the target class

ctx - execuiton context

profilingEnabled - true to collect execution stats

Method Detail

syncPull

public OResultSet syncPull(OCommandContext ctx,
                           int nRecords)
                    throws OTimeoutException

Throws:

OTimeoutException

prettyPrint

public String prettyPrint(int depth,
                          int indent)

getCost

public long getCost()

Description copied from interface: OExecutionStep

returns the absolute cost (in nanoseconds) of the execution of this step

Returns:

the absolute cost (in nanoseconds) of the execution of this step, -1 if not calculated

copy

public OExecutionStep copy(OCommandContext ctx)

canBeCached

public boolean canBeCached()