Package com.orientechnologies.orient.core.sql.filter

Class OSQLPredicate

java.lang.Object

com.orientechnologies.common.parser.OBaseParser

com.orientechnologies.orient.core.sql.filter.OSQLPredicate

All Implemented Interfaces:

OCommandPredicate

Direct Known Subclasses:

OSQLFilter

public class OSQLPredicate
extends OBaseParser
implements OCommandPredicate

Parses text in SQL format and build a tree of conditions.

Author:

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

Field Summary

Fields

Modifier and Type	Field	Description
protected int	braces
protected OCommandContext	context
protected List<OSQLFilterItemParameter>	parameterItems
protected Set<OProperty>	properties
protected List<String>	recordTransformed
protected OSQLFilterCondition	rootCondition

Fields inherited from class com.orientechnologies.common.parser.OBaseParser

parserText, parserTextUpperCase

Constructor Summary

Constructors

Constructor	Description
OSQLPredicate()
OSQLPredicate(String iText)

Method Summary

Modifier and Type	Method	Description
OSQLFilterItemParameter	addParameter(String iName)
void	bindParameters(Map<Object,Object> iArgs)	Binds parameters.
protected boolean	checkForEnd(String iWord)
protected Set<String>	computePrefetchFieldList(OSQLFilterCondition iCondition, Set<String> iFields)
Object	evaluate()
Object	evaluate(OCommandContext iContext)
Object	evaluate(OIdentifiable iRecord, ODocument iCurrentResult, OCommandContext iContext)	Evaluates the predicate.
protected OSQLFilterCondition	extractCondition()
protected Object	extractConditions(OSQLFilterCondition iParentCondition)
OSQLFilterCondition	getRootCondition()
protected void	optimize()
void	setRootCondition(OSQLFilterCondition iCondition)
OSQLPredicate	text(String iText)
protected void	throwSyntaxErrorException(String iText)	Throws a syntax error exception.
String	toString()
static String	upperCase(String text)

Methods inherited from class com.orientechnologies.common.parser.OBaseParser

getLastWordLength, getSyntax, getWordStatic, nextWord, nextWord, parseOptionalWord, parserGetCurrentChar, parserGetCurrentPosition, parserGetLastSeparator, parserGetLastWord, parserGetPreviousPosition, parserGoBack, parserIsEnded, parserMoveCurrentPosition, parserNextChars, parserNextWord, parserNextWord, parserNextWord, parserOptionalKeyword, parserOptionalWord, parserRequiredKeyword, parserRequiredWord, parserRequiredWord, parserRequiredWord, parserSetCurrentPosition, parserSetEndOfText, parserSetLastSeparator, parserSkipWhiteSpaces

Methods inherited from class java.lang.Object

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

Field Details

properties

protected Set<OProperty> properties

rootCondition

protected OSQLFilterCondition rootCondition

recordTransformed

protected List<String> recordTransformed

parameterItems

protected List<OSQLFilterItemParameter> parameterItems

braces

protected int braces

context

protected OCommandContext context

Constructor Details

OSQLPredicate

public OSQLPredicate()

OSQLPredicate

public OSQLPredicate(String iText)

Method Details

throwSyntaxErrorException

protected void throwSyntaxErrorException(String iText)

Description copied from class: OBaseParser

Throws a syntax error exception.

Specified by:

throwSyntaxErrorException in class OBaseParser

Parameters:

iText - Text about the problem.

upperCase

public static String upperCase(String text)

text

public OSQLPredicate text(String iText)

evaluate

public Object evaluate()

evaluate

public Object evaluate(OCommandContext iContext)

evaluate

public Object evaluate(OIdentifiable iRecord,
 ODocument iCurrentResult,
 OCommandContext iContext)

Description copied from interface: OCommandPredicate

Evaluates the predicate.

Specified by:

evaluate in interface OCommandPredicate

Parameters:

iRecord - Target record

iCurrentResult - TODO

iContext - Context of execution

Returns:

The result of predicate

extractConditions

protected Object extractConditions(OSQLFilterCondition iParentCondition)

extractCondition

protected OSQLFilterCondition extractCondition()

checkForEnd

protected boolean checkForEnd(String iWord)

getRootCondition

public OSQLFilterCondition getRootCondition()

toString

public String toString()

Overrides:

toString in class Object

bindParameters

public void bindParameters(Map<Object,Object> iArgs)

Binds parameters.

addParameter

public OSQLFilterItemParameter addParameter(String iName)

setRootCondition

public void setRootCondition(OSQLFilterCondition iCondition)

optimize

protected void optimize()

computePrefetchFieldList

protected Set<String> computePrefetchFieldList(OSQLFilterCondition iCondition,
 Set<String> iFields)