org.revenj.database.postgres.jinq.jpqlquery

Class OperatorPrecedenceLevel

java.lang.Object

org.revenj.database.postgres.jinq.jpqlquery.OperatorPrecedenceLevel

public class OperatorPrecedenceLevel
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static OperatorPrecedenceLevel	JPQL_ORDER_BY_UNRESTRICTED_OPERATOR_PRECEDENCE
static OperatorPrecedenceLevel	JPQL_UNKNOWN_PRECEDENCE
static OperatorPrecedenceLevel	JPQL_UNRESTRICTED_OPERATOR_PRECEDENCE

Constructor Summary

Constructors

Constructor and Description
OperatorPrecedenceLevel()

Method Summary

Modifier and Type	Method and Description
static OperatorPrecedenceLevel	forOperator(String op)
OperatorPrecedenceLevel	getLevelBelow()
boolean	hasPrecedence(OperatorPrecedenceLevel scope) Lookup table that maps an operator symbol to its precedence in order of operations (lower numbers have higher precedence).

Methods inherited from class java.lang.Object

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

Field Detail

JPQL_UNRESTRICTED_OPERATOR_PRECEDENCE

public static final OperatorPrecedenceLevel JPQL_UNRESTRICTED_OPERATOR_PRECEDENCE

JPQL_ORDER_BY_UNRESTRICTED_OPERATOR_PRECEDENCE

public static final OperatorPrecedenceLevel JPQL_ORDER_BY_UNRESTRICTED_OPERATOR_PRECEDENCE

JPQL_UNKNOWN_PRECEDENCE

public static final OperatorPrecedenceLevel JPQL_UNKNOWN_PRECEDENCE

Constructor Detail

OperatorPrecedenceLevel

public OperatorPrecedenceLevel()

Method Detail

hasPrecedence

public boolean hasPrecedence(OperatorPrecedenceLevel scope)

Lookup table that maps an operator symbol to its precedence in order of operations (lower numbers have higher precedence). This is used to remove excess brackets, making queries easier to read and to not overstress certain JPQL implementations which can't handle the extra brackets sometimes.

getLevelBelow

public OperatorPrecedenceLevel getLevelBelow()

forOperator

public static OperatorPrecedenceLevel forOperator(String op)