com.orientechnologies.orient.core.sql.parser

Class OParenthesisBlock

java.lang.Object

com.orientechnologies.orient.core.sql.parser.SimpleNode

com.orientechnologies.orient.core.sql.parser.OBooleanExpression

com.orientechnologies.orient.core.sql.parser.OParenthesisBlock

All Implemented Interfaces:

Node

public class OParenthesisBlock
extends OBooleanExpression

Field Summary

Fields

Modifier and Type	Field and Description
protected OBooleanExpression	subElement

Fields inherited from class com.orientechnologies.orient.core.sql.parser.OBooleanExpression

FALSE, TRUE

Fields inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

children, firstToken, id, lastToken, parent, parser, value

Constructor Summary

Constructors

Constructor and Description
OParenthesisBlock(int id)
OParenthesisBlock(OrientSql p, int id)

Method Summary

Modifier and Type	Method and Description
OParenthesisBlock	copy()
boolean	equals(Object o)
boolean	evaluate(OIdentifiable currentRecord, OCommandContext ctx)
boolean	evaluate(OResult currentRecord, OCommandContext ctx)
void	extractSubQueries(SubQueryCollector collector)
List<OAndBlock>	flatten()
protected List<Object>	getExternalCalculationConditions()
List<String>	getMatchPatternInvolvedAliases()
protected int	getNumberOfExternalCalculations()
int	hashCode()
boolean	isAlwaysTrue() returns true only if the expression does not need any further evaluation (eg.
boolean	isCacheable()
boolean	needsAliases(Set<String> aliases)
boolean	refersToParent()
boolean	supportsBasicCalculation()
void	toString(Map<Object,Object> params, StringBuilder builder)
void	translateLuceneOperator()

Methods inherited from class com.orientechnologies.orient.core.sql.parser.OBooleanExpression

deserialize, deserializeFromOResult, encapsulateInAndBlock, getIndexedFunctionConditions, isEmpty, rewriteIndexChainsAsSubqueries, serialize, transformToUpdateItem

Methods inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

childrenAccept, dump, getDatabase, getValue, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetFirstToken, jjtGetLastToken, jjtGetNumChildren, jjtGetParent, jjtGetValue, jjtOpen, jjtSetFirstToken, jjtSetLastToken, jjtSetParent, jjtSetValue, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

subElement

protected OBooleanExpression subElement

Constructor Detail

OParenthesisBlock

public OParenthesisBlock(int id)

OParenthesisBlock

public OParenthesisBlock(OrientSql p,
                         int id)

Method Detail

evaluate

public boolean evaluate(OIdentifiable currentRecord,
                        OCommandContext ctx)

Specified by:

evaluate in class OBooleanExpression

evaluate

public boolean evaluate(OResult currentRecord,
                        OCommandContext ctx)

Specified by:

evaluate in class OBooleanExpression

toString

public void toString(Map<Object,Object> params,
                     StringBuilder builder)

Overrides:

toString in class SimpleNode

supportsBasicCalculation

public boolean supportsBasicCalculation()

Specified by:

supportsBasicCalculation in class OBooleanExpression

Returns:

true if this expression can be calculated in plain Java, false otherwise (eg. LUCENE operator)

getNumberOfExternalCalculations

protected int getNumberOfExternalCalculations()

Specified by:

getNumberOfExternalCalculations in class OBooleanExpression

Returns:

the number of sub-expressions that have to be calculated using an external engine (eg. LUCENE)

getExternalCalculationConditions

protected List<Object> getExternalCalculationConditions()

Specified by:

getExternalCalculationConditions in class OBooleanExpression

Returns:

the sub-expressions that have to be calculated using an external engine (eg. LUCENE)

flatten

public List<OAndBlock> flatten()

Overrides:

flatten in class OBooleanExpression

needsAliases

public boolean needsAliases(Set<String> aliases)

Specified by:

needsAliases in class OBooleanExpression

copy

public OParenthesisBlock copy()

Specified by:

copy in class OBooleanExpression

extractSubQueries

public void extractSubQueries(SubQueryCollector collector)

Specified by:

extractSubQueries in class OBooleanExpression

refersToParent

public boolean refersToParent()

Specified by:

refersToParent in class OBooleanExpression

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getMatchPatternInvolvedAliases

public List<String> getMatchPatternInvolvedAliases()

Specified by:

getMatchPatternInvolvedAliases in class OBooleanExpression

translateLuceneOperator

public void translateLuceneOperator()

Overrides:

translateLuceneOperator in class OBooleanExpression

isCacheable

public boolean isCacheable()

Specified by:

isCacheable in class OBooleanExpression

isAlwaysTrue

public boolean isAlwaysTrue()

Description copied from class: OBooleanExpression

returns true only if the expression does not need any further evaluation (eg. "true") and always evaluates to true. It is supposed to be used as and optimization, and is allowed to return false negatives

Overrides:

isAlwaysTrue in class OBooleanExpression

Returns: