wt.query
Class FixedLengthStringExpression

java.lang.Object
  wt.query.FixedLengthStringExpression

All Implemented Interfaces:

Expression, RelationalExpression, Serializable

public class FixedLengthStringExpression

extends Object

implements RelationalExpression, Serializable

This class represents a fixed length string constant in a SQL statement.

Supported API: true

Extendable: false

See Also:

Serialized Form

Field Summary

private static String	CLASSNAME
private static DMLGenerator	dmlGenerator
private static String	RESOURCE
private String	value

Fields inherited from interface wt.query.RelationalExpression

BIND_PARAMETER

Fields inherited from interface wt.query.Expression

FROM_COUNT

Constructor Summary

FixedLengthStringExpression(Character a_value, int a_length, char a_fill)


Supported API: true

FixedLengthStringExpression(String a_value, int a_length, char a_fill)


Supported API: true

Method Summary

Object	getBindParameter() Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).
List	getClassAttributes() Supported API: false
private DMLGenerator	getDMLGenerator()
String	getExpression(boolean a_useBind, Vector a_tableInfos, Vector a_aliases, boolean a_outerJoin) Return string representation of this expression.
int	getFromCount() Gets the value of the attribute: fromCount; Number of from index values that this expression requires Supported API: false
int	setFromAlias(String[] a_aliases, int a_offset) This method sets the FROM clause alias for this expression.
int	validate(TableExpression[] a_tableExpressions, int a_offset) This method validates this expression against the specified table expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

value

private String value

dmlGenerator

private static DMLGenerator dmlGenerator

Constructor Detail

FixedLengthStringExpression

public FixedLengthStringExpression(String a_value,
                                   int a_length,
                                   char a_fill)

Supported API: true

Parameters:

a_value - String value.

a_length - Fixed length of the string column.

a_fill - Character to use to fill if the string size is less than a_length.

FixedLengthStringExpression

public FixedLengthStringExpression(Character a_value,
                                   int a_length,
                                   char a_fill)

Supported API: true

Parameters:

a_value - Character value for the String

a_length - Fixed length of the string column.

a_fill - Character to use to fill if the string size is less than a_length.

Method Detail

getBindParameter

public Object getBindParameter()
                        throws WTException

Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).

Supported API: false

Specified by:

getBindParameter in interface RelationalExpression

Returns:

Object

Throws:

WTException

getExpression

public String getExpression(boolean a_useBind,
                            Vector a_tableInfos,
                            Vector a_aliases,
                            boolean a_outerJoin)
                     throws QueryException

Return string representation of this expression.

Supported API: false

Specified by:

getExpression in interface RelationalExpression

Parameters:

a_useBind - Indicates that bind variables should be used for this expression.

a_tableInfos -

a_aliases -

a_outerJoin - Indicates that outer join syntax should be used for this expression.

Returns:

String

Throws:

QueryException

getClassAttributes

public List getClassAttributes()

Supported API: false

Specified by:

getClassAttributes in interface RelationalExpression

Returns:

List

getFromCount

public int getFromCount()

Gets the value of the attribute: fromCount; Number of from index values that this expression requires

Supported API: false

Specified by:

getFromCount in interface Expression

Returns:

int

validate

public int validate(TableExpression[] a_tableExpressions,
                    int a_offset)
             throws QueryException

This method validates this expression against the specified table expression. A QueryException is thrown if this expression is not valid.

Supported API: false

Specified by:

validate in interface Expression

Parameters:

a_tableExpressions - Table expression to validate against.

a_offset - Offset index into the TableExpression array for the next valid TableExpression

Returns:

number of TableExpressions validated

Throws:

QueryException

setFromAlias

public int setFromAlias(String[] a_aliases,
                        int a_offset)

This method sets the FROM clause alias for this expression. This alias is used in this Expression in place of the corresponding TableExpression.

Supported API: false

Specified by:

setFromAlias in interface Expression

Parameters:

a_aliases - Array of aliases for expressions

a_offset - Offset index into the alias array for the next valid alias

Returns:

number of aliases used

getDMLGenerator

private DMLGenerator getDMLGenerator()