wt.query
Class RangeExpression

java.lang.Object
  wt.query.RangeExpression

All Implemented Interfaces:

Expression, Externalizable, RelationalExpression, Serializable

public class RangeExpression

extends Object

implements RelationalExpression, Externalizable

This class represents a range in a SQL WHERE clause. The range endpoint values (i.e. begin, end) are specified via the AttributeRange class.

Supported API: true

Extendable: false

See Also:

Serialized Form

Field Summary

private static String	CLASSNAME
private RelationalExpression	end
static long	EXTERNALIZATION_VERSION_UID
protected static long	OLD_FORMAT_VERSION_UID
private static String	RESOURCE
(package private) static long	serialVersionUID
private RelationalExpression	start

Fields inherited from interface wt.query.RelationalExpression

BIND_PARAMETER

Fields inherited from interface wt.query.Expression

FROM_COUNT

Constructor Summary

RangeExpression()


Supported API: false

RangeExpression(AttributeRange a_value)


Supported API: true

Method Summary

BinaryValue	getBinaryValue()
Object	getBindParameter() Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).
List	getClassAttributes() Supported API: false
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
void	readExternal(ObjectInput input) Reads the non-transient fields of this class from an external source.
private boolean	readOldVersion(ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source, which is not the current version.
protected boolean	readVersion(RangeExpression thisObject, ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source.
int	setFromAlias(String[] a_aliases, int a_offset) This method sets the FROM clause alias for this expression.
String	toString()
int	validate(TableExpression[] a_tableExpressions, int a_offset) This method validates this expression against the specified table expression.
void	writeExternal(ObjectOutput output) Writes the non-transient fields of this class to an external source.

Methods inherited from class java.lang.Object

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

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

start

private RelationalExpression start

end

private RelationalExpression end

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

EXTERNALIZATION_VERSION_UID

public static final long EXTERNALIZATION_VERSION_UID

See Also:

Constant Field Values

OLD_FORMAT_VERSION_UID

protected static final long OLD_FORMAT_VERSION_UID

See Also:

Constant Field Values

Constructor Detail

RangeExpression

public RangeExpression()

Supported API: false

RangeExpression

public RangeExpression(AttributeRange a_value)

Supported API: true

Parameters:

a_value - Range of values for this expression.

Method Detail

writeExternal

public void writeExternal(ObjectOutput output)
                   throws IOException

Writes the non-transient fields of this class to an external source.

Supported API: false

Specified by:

writeExternal in interface Externalizable

Parameters:

output -

Throws:

IOException

readExternal

public void readExternal(ObjectInput input)
                  throws IOException,
                         ClassNotFoundException

Reads the non-transient fields of this class from an external source.

Supported API: false

Specified by:

readExternal in interface Externalizable

Parameters:

input -

Throws:

IOException

ClassNotFoundException

readVersion

protected boolean readVersion(RangeExpression thisObject,
                              ObjectInput input,
                              long readSerialVersionUID,
                              boolean passThrough,
                              boolean superDone)
                       throws IOException,
                              ClassNotFoundException

Reads the non-transient fields of this class from an external source.

Supported API: false

Parameters:

thisObject -

input -

readSerialVersionUID -

passThrough -

superDone -

Returns:

boolean

Throws:

IOException

ClassNotFoundException

readOldVersion

private boolean readOldVersion(ObjectInput input,
                               long readSerialVersionUID,
                               boolean passThrough,
                               boolean superDone)
                        throws IOException,
                               ClassNotFoundException

Reads the non-transient fields of this class from an external source, which is not the current version.

Parameters:

input -

readSerialVersionUID -

passThrough -

superDone -

Returns:

boolean

Throws:

IOException

ClassNotFoundException

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

getBinaryValue

public BinaryValue getBinaryValue()
                           throws WTPropertyVetoException

Throws:

WTPropertyVetoException

toString

public String toString()