Class StringLiteral
java.lang.Object
org.datanucleus.store.rdbms.sql.expression.SQLExpression
org.datanucleus.store.rdbms.sql.expression.StringExpression
org.datanucleus.store.rdbms.sql.expression.StringLiteral
- All Implemented Interfaces:
SQLLiteral
Representation of a string literal.
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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
ConstructorsConstructorDescriptionStringLiteral
(SQLStatement stmt, JavaTypeMapping mapping, Object value, String parameterName) Constructor for a String literal with a value. -
Method Summary
Modifier and TypeMethodDescriptionadd
(SQLExpression expr) Additive Operator.eq
(SQLExpression expr) Equality operator (equals to)ge
(SQLExpression expr) Relational operator (greater than or equals)void
Convenience method to generate the statement without any quotes.getValue()
Accessor to the literal valuegt
(SQLExpression expr) Relational operator (greater than)le
(SQLExpression expr) Relational operator (lower than or equals)lt
(SQLExpression expr) Relational operator (lower than)ne
(SQLExpression expr) Not equality operator (not equals to)void
Method to set this literal as not being a parameter.protected void
Methods inherited from class org.datanucleus.store.rdbms.sql.expression.StringExpression
in, invoke
Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
and, bitAnd, bitOr, cast, com, distinct, div, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, ior, is, isParameter, mod, mul, neg, not, setJavaTypeMapping, sub, toSQLText, unDistinct
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Field Details
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value
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Constructor Details
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StringLiteral
public StringLiteral(SQLStatement stmt, JavaTypeMapping mapping, Object value, String parameterName) Constructor for a String literal with a value.- Parameters:
stmt
- the SQL statementmapping
- the mappingvalue
- the valueparameterName
- Name of the parameter that this represents (as JDBC "?")
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Method Details
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generateStatementWithoutQuotes
public void generateStatementWithoutQuotes()Convenience method to generate the statement without any quotes. This is called when we create a literal using a mapping, and don't want quotes because the string is an SQL keyword. -
getValue
Description copied from interface:SQLLiteral
Accessor to the literal value- Specified by:
getValue
in interfaceSQLLiteral
- Returns:
- the value of the literal
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eq
Description copied from class:SQLExpression
Equality operator (equals to)- Overrides:
eq
in classStringExpression
- 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 classStringExpression
- Parameters:
expr
- the right-hand operand- Returns:
- The type of an equality expression is a boolean
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lt
Description copied from class:SQLExpression
Relational operator (lower than)- Overrides:
lt
in classStringExpression
- 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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le
Description copied from class:SQLExpression
Relational operator (lower than or equals)- Overrides:
le
in classStringExpression
- 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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gt
Description copied from class:SQLExpression
Relational operator (greater than)- Overrides:
gt
in classStringExpression
- 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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ge
Description copied from class:SQLExpression
Relational operator (greater than or equals)- Overrides:
ge
in classStringExpression
- 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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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 classStringExpression
- 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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setNotParameter
public void setNotParameter()Description copied from interface:SQLLiteral
Method to set this literal as not being a parameter. If the literal if not currently a parameter then does nothing. Updates any underlying SQL to have the value.- Specified by:
setNotParameter
in interfaceSQLLiteral
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setStatement
protected void setStatement()
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