| Access | Constructor and Description |
|---|---|
| public |
| Modifier and Type | Method and Description |
|---|---|
| public boolean | compatible(TypeId
The TypeId of the other type. otherType)Implements org. Tell whether this type (numeric) is compatible with the given type. |
| public boolean | convertible(TypeId
The CompilationType of the other type to compare
this type to otherType, boolean true if this is a type function that
requires more liberal behavior (e.g DOUBLE can convert a char but
you cannot cast a CHAR to double. forDataTypeFunction)Implements org. Determine if this type can be CONVERTed to some other type |
| pack-priv String | dataValueMethodName()
Overrides org. Return the method name to get a Derby DataValueDescriptor object of the correct type. |
| public void | generateDataValue(MethodBuilder
The method to put the expression in mb, int For character DVDs, this will be used to determine
what Collator should be associated with the DVD which in turn will
decide whether to generate CollatorSQLcharDVDs or SQLcharDVDs. For
other types of DVDs, this parameter will be ignored. collationType, LocalField LocalField field)Overrides org. Implements org. The caller will have pushed a DataValueFactory and value of that can be converted to the correct type, e.g. int for a SQL INTEGER. |
| public int | getCastToCharWidth(DataTypeDescriptor
The associated DataTypeDescriptor for this TypeId. dts)Implements org. Return the maximum width for this data type when cast to a char type. |
| public String | getCorrespondingPrimitiveTypeName()
Implements org. Get the name of the corresponding Java type. |
| private int | Returns: the resultant precisiona string representing the operator,
null means no operator, just a type merge operator, DataTypeDescriptor the left type leftType, DataTypeDescriptor the left type rightType)Get the precision of the operation involving two of the same types. |
| public String | Returns: String The method call name for getting the corresponding primitive Java type.Overrides org. Implements org. Get the method name for getting out the corresponding primitive Java type. |
| private int | Returns: the resultant precisiona string representing the operator,
null means no operator, just a type merge operator, DataTypeDescriptor the left type leftType, DataTypeDescriptor the left type rightType)Get the scale of the operation involving two of the same types. |
| public String | interfaceName()
Implements org. Get the name of the interface for this type. |
| pack-priv String | nullMethodName()
Implements abstract org. Return the method name to get a Derby DataValueDescriptor object of the correct type set to SQL NULL. |
| public DataTypeDescriptor | resolveArithmeticOperation(DataTypeDescriptor
The type of the left parameter leftType, DataTypeDescriptor The type of the right parameter rightType, String The name of the operator (e.g. "+"). operator)Overrides org. Implements org. Type resolution methods on binary operators |
| public boolean | storable(TypeId
The TypeId of the other type to compare this type to otherType, ClassFactory A ClassFactory cf)Implements org. Determine if this type can have a value of another type stored into it. |
| NumericTypeCompiler | back to summary |
|---|---|
| public NumericTypeCompiler() | |
| compatible | back to summary |
|---|---|
| public boolean compatible(TypeId otherType) Implements org. Tell whether this type (numeric) is compatible with the given type.
| |
| convertible | back to summary |
|---|---|
| public boolean convertible(TypeId otherType, boolean forDataTypeFunction) Implements org. Doc from org. Determine if this type can be CONVERTed to some other type
| |
| dataValueMethodName | back to summary |
|---|---|
| pack-priv String dataValueMethodName() Overrides org. Return the method name to get a Derby DataValueDescriptor object of the
correct type. This implementation returns
| |
| generateDataValue | back to summary |
|---|---|
| public void generateDataValue(MethodBuilder mb, int collationType, LocalField field) Overrides org. Implements org. Doc from org. The caller will have pushed a DataValueFactory and value of that can be converted to the correct type, e.g. int for a SQL INTEGER. Thus upon entry the stack looks like: ...,dvf,value If field is not null then it is used as the holder of the generated DataValueDescriptor to avoid object creations on multiple passes through this code. The field may contain null or a valid value. This method then sets up to call the required method on DataValueFactory using the dataValueMethodName(). The value left on the stack will be a DataValueDescriptor of the correct type: If the field contained a valid value then generated code will return that value rather than a newly created object. If field was not-null then the generated code will set the value of field to be the return from the DataValueFactory method call. Thus if the field was empty (set to null) when this code is executed it will contain the newly generated value, otherwise it will be reset to the same value. ...,dvd
| |
| getCastToCharWidth | back to summary |
|---|---|
| public int getCastToCharWidth(DataTypeDescriptor dts) Implements org. Doc from org. Return the maximum width for this data type when cast to a char type.
| |
| getCorrespondingPrimitiveTypeName | back to summary |
|---|---|
| public String getCorrespondingPrimitiveTypeName() Implements org. Doc from org. Get the name of the corresponding Java type. For numerics and booleans we will get the corresponding Java primitive type. e Each SQL type has a corresponding Java type. When a SQL value is passed to a Java method, it is translated to its corresponding Java type. For example, a SQL Integer will be mapped to a Java int, but a SQL date will be mapped to a java.sql.Date.
| |
| getPrecision | back to summary |
|---|---|
| private int getPrecision(String operator, DataTypeDescriptor leftType, DataTypeDescriptor rightType) Get the precision of the operation involving two of the same types. Only meaningful for decimals, which override this.
| |
| getPrimitiveMethodName | back to summary |
|---|---|
| public String getPrimitiveMethodName() Overrides org. Implements org. Get the method name for getting out the corresponding primitive Java type. | |
| getScale | back to summary |
|---|---|
| private int getScale(String operator, DataTypeDescriptor leftType, DataTypeDescriptor rightType) Get the scale of the operation involving two of the same types. Since we don't really have a good way to pass the resultant scale and precision around at execution time, we will model that BigDecimal does by default. This is good in most cases, though we would probably like to use something more sophisticated for division.
| |
| interfaceName | back to summary |
|---|---|
| public String interfaceName() Implements org. Doc from org. Get the name of the interface for this type. For example, the interface for a SQLInteger is NumberDataValue. The full path name of the type is returned.
| |
| nullMethodName | back to summary |
|---|---|
| pack-priv String nullMethodName() Implements abstract org. Doc from org. Return the method name to get a Derby DataValueDescriptor object of the correct type set to SQL NULL. The method named will be called with one argument: a holder object if pushCollationForDataValue() returns false, otherwise two arguments, the second being the collationType. | |
| resolveArithmeticOperation | back to summary |
|---|---|
| public DataTypeDescriptor resolveArithmeticOperation(DataTypeDescriptor leftType, DataTypeDescriptor rightType, String operator) throws StandardException Overrides org. Implements org. Doc from org. Type resolution methods on binary operators
| |
| storable | back to summary |
|---|---|
| public boolean storable(TypeId otherType, ClassFactory cf) Implements org. Doc from org. Determine if this type can have a value of another type stored into it. Note that direction is relevant here: the test is that the otherType is storable into this type.
| |