org.d2rq.db.expr
Class BooleanToIntegerCaseExpression
java.lang.Object
org.d2rq.db.expr.Expression
org.d2rq.db.expr.BooleanToIntegerCaseExpression
public class BooleanToIntegerCaseExpression
- extends Expression
A CASE statement that turns a BOOLEAN (TRUE, FALSE) into an
INT (1, 0)
- Author:
- Richard Cyganiak (richard@cyganiak.de)
BooleanToIntegerCaseExpression
public BooleanToIntegerCaseExpression(Expression base)
getBase
public Expression getBase()
getColumns
public Set<ColumnName> getColumns()
- Specified by:
getColumns
in class Expression
isFalse
public boolean isFalse()
- Specified by:
isFalse
in class Expression
isTrue
public boolean isTrue()
- Specified by:
isTrue
in class Expression
isConstant
public boolean isConstant()
- Specified by:
isConstant
in class Expression
isConstantColumn
public boolean isConstantColumn(ColumnName column,
boolean constIfTrue,
boolean constIfFalse,
boolean constIfConstantValue)
- Description copied from class:
Expression
- Checks whether this expression forces a given column to be a constant,
that is, have the same value everywhere. For example,
T.COL1=5 forces T.COL1 to be constant if the expression is assumed
to be true; T.COL1+1 forces it to be constant if the expression
is assumed to evaluate to a constant value. Exactly one of the three
constXXX arguments must be true, the other two must be false.
- Specified by:
isConstantColumn
in class Expression
- Parameters:
column
- The column to be checkedconstIfTrue
- Is the column constant assuming the expression evaluates to true?constIfFalse
- Is the column constant assuming the expression evaluates to false?constIfConstantValue
- Is column constant assuming the expression evaluates to a value equal to some constant?
rename
public Expression rename(Renamer columnRenamer)
- Specified by:
rename
in class Expression
toSQL
public String toSQL(DatabaseOp table,
Vendor vendor)
- Specified by:
toSQL
in class Expression
getDataType
public DataType getDataType(DatabaseOp table,
Vendor vendor)
- Specified by:
getDataType
in class Expression
toString
public String toString()
- Overrides:
toString
in class Object
equals
public boolean equals(Object other)
- Overrides:
equals
in class Object
hashCode
public int hashCode()
- Overrides:
hashCode
in class Object