Class DelegatedExpression
java.lang.Object
org.datanucleus.store.rdbms.sql.expression.SQLExpression
org.datanucleus.store.rdbms.sql.expression.DelegatedExpression
- Direct Known Subclasses:
EnumExpression
,SingleCollectionExpression
,StringNumericExpression
,StringTemporalExpression
,TypeConverterExpression
,TypeConverterLiteral
Expression for a field/property that can delegate to an internal expression(s).
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Nested Class Summary
Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
SQLExpression.ColumnExpressionList
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Field Summary
FieldsFields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
lowestOperator, mapping, parameterName, st, stmt, subExprs, table
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Constructor Summary
ConstructorsConstructorDescriptionDelegatedExpression
(SQLStatement stmt, SQLTable table, JavaTypeMapping mapping) -
Method Summary
Modifier and TypeMethodDescriptionadd
(SQLExpression expr) Additive Operator.div
(SQLExpression expr) Division Operator.eq
(SQLExpression expr) Equality operator (equals to)ge
(SQLExpression expr) Relational operator (greater than or equals)Accessor for the delegate that represents this enum.gt
(SQLExpression expr) Relational operator (greater than)invoke
(String methodName, List<SQLExpression> args) Invocation of a method on this expression.boolean
le
(SQLExpression expr) Relational operator (lower than or equals)lt
(SQLExpression expr) Relational operator (lower than)mod
(SQLExpression expr) Remainder Operator.mul
(SQLExpression expr) Multiplication Operatorne
(SQLExpression expr) Not equality operator (not equals to)sub
(SQLExpression expr) Additive Operator.Method to return the SQL form of this expression.Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
and, bitAnd, bitOr, cast, com, distinct, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, in, ior, is, neg, not, setJavaTypeMapping, unDistinct
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Field Details
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delegate
The delegate expression that we use. MUST BE SET ON CONSTRUCTION.
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Constructor Details
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DelegatedExpression
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Method Details
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eq
Description copied from class:SQLExpression
Equality operator (equals to)- Overrides:
eq
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The type of an equality expression is a boolean
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ne
Description copied from class:SQLExpression
Not equality operator (not equals to)- Overrides:
ne
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The type of an equality expression is a boolean
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add
Description copied from class:SQLExpression
Additive Operator. The binary + operator performs addition when applied to two operands of numeric type, producing the sum of the operands. If the type of either operand of a + operator is String, then the operation is string concatenation.- Overrides:
add
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- If one of the operands is String, the returned value is the string concatenation; The sum of two operands of numeric type. The left-hand operand is the minuend and the right-hand operand is the subtrahend;
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div
Description copied from class:SQLExpression
Division Operator. The left-hand operand is the dividend and the right-hand operand is the divisor.- Overrides:
div
in classSQLExpression
- Parameters:
expr
- the right-hand operator- Returns:
- The binary / operator performs division, producing the quotient of its operands
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ge
Description copied from class:SQLExpression
Relational operator (greater than or equals)- Overrides:
ge
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- true if the value of the left-hand operand is greater than or equal the value of the right-hand operand, and otherwise is false.
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gt
Description copied from class:SQLExpression
Relational operator (greater than)- Overrides:
gt
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- true if the value of the left-hand operand is greater than the value of the right-hand operand, and otherwise is false.
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le
Description copied from class:SQLExpression
Relational operator (lower than or equals)- Overrides:
le
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- true if the value of the left-hand operand is less than or equal to the value of the right-hand operand, and otherwise is false.
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lt
Description copied from class:SQLExpression
Relational operator (lower than)- Overrides:
lt
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- true if the value of the left-hand operand is less than the value of the right-hand operand, and otherwise is false.
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mod
Description copied from class:SQLExpression
Remainder Operator. The left-hand operand is the dividend and the right-hand operand is the divisor.- Overrides:
mod
in classSQLExpression
- Parameters:
expr
- the right-hand operator- Returns:
- The binary % operator is said to yield the remainder of its operands from an implied division
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mul
Description copied from class:SQLExpression
Multiplication Operator- Overrides:
mul
in classSQLExpression
- Parameters:
expr
- the right-hand operator- Returns:
- The binary * operator performs multiplication, producing the product of its operands.
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sub
Description copied from class:SQLExpression
Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.- Overrides:
sub
in classSQLExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The binary - operator performs subtraction when applied to two operands of numeric type producing the difference of its operands; the left-hand operand is the minuend and the right-hand operand is the subtrahend.
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invoke
Description copied from class:SQLExpression
Invocation of a method on this expression.- Overrides:
invoke
in classSQLExpression
- Parameters:
methodName
- name of the method to invokeargs
- Args to this method (if any)- Returns:
- the converted value
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toSQLText
Description copied from class:SQLExpression
Method to return the SQL form of this expression.- Overrides:
toSQLText
in classSQLExpression
- Returns:
- The SQL
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getDelegate
Accessor for the delegate that represents this enum. Will be either a StringExpression or a NumericExpression depending whether the enum is stored as a string or as a numeric.- Returns:
- The delegate
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isParameter
public boolean isParameter()- Overrides:
isParameter
in classSQLExpression
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