org.datanucleus.store.rdbms.sql.expression
Class CharacterExpression

java.lang.Object
  extended by org.datanucleus.store.rdbms.sql.expression.SQLExpression
      extended by org.datanucleus.store.rdbms.sql.expression.CharacterExpression
Direct Known Subclasses:
CharacterLiteral

public class CharacterExpression
extends SQLExpression

Representation of a Character expression in a Query


Nested Class Summary
 
Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
SQLExpression.ColumnExpressionList
 
Field Summary
 
Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
isParameter, LOCALISER, lowestOperator, mapping, st, stmt, subExprs, table
 
Constructor Summary
CharacterExpression(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, java.lang.String functionName, java.util.List args)
          Generates statement as e.g.
CharacterExpression(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, java.lang.String functionName, java.util.List args, java.util.List types)
          Generates statement as e.g.
CharacterExpression(SQLStatement stmt, SQLTable table, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping)
          Constructor for an SQL expression for a (field) mapping in a specified table.
 
Method Summary
 SQLExpression add(SQLExpression expr)
          Additive Operator.
 SQLExpression com()
          Bitwise Complement Operator
 SQLExpression div(SQLExpression expr)
          Division Operator.
 BooleanExpression eq(SQLExpression expr)
          Equality operator (equals to)
 BooleanExpression ge(SQLExpression expr)
          Relational operator (greater than or equals)
 BooleanExpression gt(SQLExpression expr)
          Relational operator (greater than)
 BooleanExpression in(SQLExpression expr)
          In expression.
 SQLExpression invoke(java.lang.String methodName, java.util.List args)
          Invocation of a method on this expression.
 BooleanExpression le(SQLExpression expr)
          Relational operator (lower than or equals)
 BooleanExpression lt(SQLExpression expr)
          Relational operator (lower than)
 SQLExpression mod(SQLExpression expr)
          Method to return a modulus expression.
 SQLExpression mul(SQLExpression expr)
          Multiplication Operator
 BooleanExpression ne(SQLExpression expr)
          Not equality operator (not equals to)
 SQLExpression neg()
          Unary Minus Operator
 SQLExpression sub(SQLExpression expr)
          Additive Operator.
 
Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
and, cast, checkForAndCorrectParameterComparison, encloseInParentheses, eor, getJavaTypeMapping, getNumberOfSubExpressions, getSQLStatement, getSQLTable, ior, is, isParameter, not, toSQLText
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

CharacterExpression

public CharacterExpression(SQLStatement stmt,
                           SQLTable table,
                           org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping)
Constructor for an SQL expression for a (field) mapping in a specified table.

Parameters:
stmt - The statement
table - The table in the statement
mapping - The mapping for the field

CharacterExpression

public CharacterExpression(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                           java.lang.String functionName,
                           java.util.List args)
Generates statement as e.g. FUNCTION_NAME(arg[,argN]). The function returns a character value. This is used where we are invoking some SQL function and it returns a character.

Parameters:
mapping - Mapping to use
functionName -
args - SQLExpression list

CharacterExpression

public CharacterExpression(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                           java.lang.String functionName,
                           java.util.List args,
                           java.util.List types)
Generates statement as e.g. FUNCTION_NAME(arg [AS type] [,argN [AS type]]). The function returns a character value. This is used where we are invoking some SQL function and it returns a character.

Parameters:
mapping - Mapping to use
functionName -
args - SQLExpression list
types - Optional types list for the args
Method Detail

eq

public BooleanExpression eq(SQLExpression expr)
Description copied from class: SQLExpression
Equality operator (equals to)

Overrides:
eq in class SQLExpression
Parameters:
expr - the right-hand operand
Returns:
The type of an equality expression is a boolean

ne

public BooleanExpression ne(SQLExpression expr)
Description copied from class: SQLExpression
Not equality operator (not equals to)

Overrides:
ne in class SQLExpression
Parameters:
expr - the right-hand operand
Returns:
The type of an equality expression is a boolean

lt

public BooleanExpression lt(SQLExpression expr)
Description copied from class: SQLExpression
Relational operator (lower than)

Overrides:
lt in class SQLExpression
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.

le

public BooleanExpression le(SQLExpression expr)
Description copied from class: SQLExpression
Relational operator (lower than or equals)

Overrides:
le in class SQLExpression
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.

gt

public BooleanExpression gt(SQLExpression expr)
Description copied from class: SQLExpression
Relational operator (greater than)

Overrides:
gt in class SQLExpression
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.

ge

public BooleanExpression ge(SQLExpression expr)
Description copied from class: SQLExpression
Relational operator (greater than or equals)

Overrides:
ge in class SQLExpression
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.

add

public SQLExpression add(SQLExpression expr)
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 class SQLExpression
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;

sub

public SQLExpression sub(SQLExpression expr)
Description copied from class: SQLExpression
Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.

Overrides:
sub in class SQLExpression
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.

mul

public SQLExpression mul(SQLExpression expr)
Description copied from class: SQLExpression
Multiplication Operator

Overrides:
mul in class SQLExpression
Parameters:
expr - the right-hand operator
Returns:
The binary * operator performs multiplication, producing the product of its operands.

div

public SQLExpression div(SQLExpression expr)
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 class SQLExpression
Parameters:
expr - the right-hand operator
Returns:
The binary / operator performs division, producing the quotient of its operands

mod

public SQLExpression mod(SQLExpression expr)
Method to return a modulus expression.

Overrides:
mod in class SQLExpression
Parameters:
expr - The expression to modulus against
Returns:
The modulus expression

neg

public SQLExpression neg()
Description copied from class: SQLExpression
Unary Minus Operator

Overrides:
neg in class SQLExpression
Returns:
the type of the unary minus expression is the promoted type of the operand.

com

public SQLExpression com()
Description copied from class: SQLExpression
Bitwise Complement Operator

Overrides:
com in class SQLExpression
Returns:
the type of the unary bitwise complement expression is the promoted type of the operand.

in

public BooleanExpression in(SQLExpression expr)
Description copied from class: SQLExpression
In expression. Return true if this is contained by expr

Overrides:
in in class SQLExpression
Parameters:
expr - the right-hand expression
Returns:
true if the left-hand expression is contained by the right-hand expression. Otherwise the result is false.

invoke

public SQLExpression invoke(java.lang.String methodName,
                            java.util.List args)
Description copied from class: SQLExpression
Invocation of a method on this expression.

Overrides:
invoke in class SQLExpression
Parameters:
methodName - name of the method to invoke
args - Args to this method (if any)
Returns:
the converted value


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