BooleanExpression (DataNucleus RDBMS plugin 4.1.19-SNAPSHOT API)

java.lang.Object
- org.datanucleus.store.rdbms.sql.expression.SQLExpression
- - org.datanucleus.store.rdbms.sql.expression.BooleanExpression

Direct Known Subclasses:

BooleanLiteral, BooleanSubqueryExpression, CaseBooleanExpression, InExpression
```
public class BooleanExpression
extends SQLExpression
```
Representation of a Boolean expression in a Query. Can be represented in one of the following ways in the datastore
- As String-based, so stored as "Y", "N"
- As numeric-based, so stored as 1, 0
- As boolean-based, so stored as true, false
A boolean expression has "closure" if it represents a boolean SQL expression (i.e "fld == val"). If it doesn't have "closure" then it represents a clause like "booleanFld" or "false" or "true".

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
  lowestOperator, mapping, parameterName, st, stmt, subExprs, table

Constructor Summary

Constructors
Constructor and Description
`BooleanExpression(org.datanucleus.query.expression.Expression.MonadicOperator op, SQLExpression expr1)` Perform an operation
`BooleanExpression(SQLExpression expr1, org.datanucleus.query.expression.Expression.DyadicOperator op, SQLExpression expr2)` Perform an operation
`BooleanExpression(SQLStatement stmt, JavaTypeMapping mapping)` Constructor for a boolean expression for the specified mapping of the table.
`BooleanExpression(SQLStatement stmt, JavaTypeMapping mapping, String sql)` Constructor for a boolean expression for the specified mapping using the specified SQL text.
`BooleanExpression(SQLStatement stmt, SQLTable table, JavaTypeMapping mapping)` Constructor for a boolean expression for the specified mapping of the table.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`BooleanExpression`	`and(SQLExpression expr)` Conditional AND.
`BooleanExpression`	`eor(SQLExpression expr)` Exclusive OR
`BooleanExpression`	`eq(SQLExpression expr)` Equality operator (equals to)
`boolean`	`hasClosure()`
`BooleanExpression`	`in(SQLExpression expr, boolean not)` In expression.
`SQLExpression`	`invoke(String methodName, List args)` Invocation of a method on this expression.
`BooleanExpression`	`ior(SQLExpression expr)` Conditional OR.
`BooleanExpression`	`ne(SQLExpression expr)` Not equality operator (not equals to)
`BooleanExpression`	`neg()` Unary Minus Operator
`BooleanExpression`	`not()` Logical complement

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression
add, bitAnd, bitOr, cast, com, distinct, div, encloseInParentheses, ge, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, gt, is, isParameter, le, lt, mod, mul, setJavaTypeMapping, sub, toSQLText

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BooleanExpression
```
public BooleanExpression(SQLStatement stmt,
                         JavaTypeMapping mapping,
                         String sql)
```
    Constructor for a boolean expression for the specified mapping using the specified SQL text.
    
    Parameters:
    
    stmt - The statement
    
    mapping - the mapping associated to this expression
    
    sql - The SQL text that will return a boolean
  - BooleanExpression
```
public BooleanExpression(SQLStatement stmt,
                         SQLTable table,
                         JavaTypeMapping mapping)
```
    Constructor for a boolean expression for the specified mapping of the table. The boolean expression DOESN'T have closure using this constructor.
    
    Parameters:
    
    stmt - The statement
    
    table - The table this mapping belongs to
    
    mapping - the mapping associated to this expression
  - BooleanExpression
```
public BooleanExpression(SQLStatement stmt,
                         JavaTypeMapping mapping)
```
    Constructor for a boolean expression for the specified mapping of the table. The boolean expression has closure using this constructor.
    
    Parameters:
    
    stmt - The statement
    
    mapping - the mapping associated to this expression
  - BooleanExpression
```
public BooleanExpression(org.datanucleus.query.expression.Expression.MonadicOperator op,
                         SQLExpression expr1)
```
    Perform an operation
```
op
```
    on expression
```
expr1
```
    . The boolean expression has closure using this constructor.
    Parameters:
    
    op - operator
    
    expr1 - operand
  - BooleanExpression
```
public BooleanExpression(SQLExpression expr1,
                         org.datanucleus.query.expression.Expression.DyadicOperator op,
                         SQLExpression expr2)
```
    Perform an operation
```
op
```
    between
```
expr1
```
    and
```
expr2
```
    . The boolean expression has closure using this constructor.
    Parameters:
    
    expr1 - the first expression
    
    op - the operator between operands
    
    expr2 - the second expression
- Method Detail
  - hasClosure
```
public boolean hasClosure()
```
  - and
```
public BooleanExpression and(SQLExpression expr)
```
    Description copied from class: SQLExpression
    
    Conditional AND. Evaluates its right-hand operand only if the value of its left-hand operand is true.
    
    Overrides:
    
    and in class SQLExpression
    
    Parameters:
    
    expr - the right-hand operand
    
    Returns:
    
    the result value is true if both operand values are true; otherwise, the result is false.
  - eor
```
public BooleanExpression eor(SQLExpression expr)
```
    Description copied from class: SQLExpression
    
    Exclusive OR
    
    Overrides:
    
    eor in class SQLExpression
    
    Parameters:
    
    expr - the right-hand operand
    
    Returns:
    
    the result value is the bitwise exclusive OR of the operand values.
  - ior
```
public BooleanExpression ior(SQLExpression expr)
```
    Description copied from class: SQLExpression
    
    Conditional OR. Evaluates its right-hand operand only if the value of its left-hand operand is false.
    
    Overrides:
    
    ior in class SQLExpression
    
    Parameters:
    
    expr - the right-hand operand
    
    Returns:
    
    the result value is false if both operand values are false; otherwise, the result is true.
  - not
```
public BooleanExpression not()
```
    Description copied from class: SQLExpression
    
    Logical complement
    
    Overrides:
    
    not in class SQLExpression
    
    Returns:
    
    the result value is false if operand is true; otherwise, the result is true.
  - 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
  - in
```
public BooleanExpression in(SQLExpression expr,
                            boolean not)
```
    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
    
    not - Whether we really want "not in"
    
    Returns:
    
    true if the left-hand expression is contained by the right-hand expression. Otherwise the result is false.
  - invoke
```
public SQLExpression invoke(String methodName,
                            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
  - neg
```
public BooleanExpression 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.

Class BooleanExpression

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

Constructor Summary

Method Summary

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

Methods inherited from class java.lang.Object

Constructor Detail

BooleanExpression

BooleanExpression

BooleanExpression

BooleanExpression

BooleanExpression

Method Detail

hasClosure

and

eor

ior

not

eq

ne

in

invoke

neg