wt.query
Class ExistsExpression

java.lang.Object
  wt.query.ExistsExpression

All Implemented Interfaces:

Externalizable, Serializable, WhereExpression

public class ExistsExpression

extends Object

implements WhereExpression, Externalizable

This class represents an EXISTS expression in a WHERE clause. A StatementSpec instance is used for the subselect.

Supported API: true

Extendable: false

See Also:

Serialized Form

Field Summary

private boolean	advancedQueryEnabled
private int	bindParameterCount
private int	bindParameterOffset
private static String	CLASSNAME
private static DMLGenerator	dmlGenerator
static long	EXTERNALIZATION_VERSION_UID
protected static long	OLD_FORMAT_VERSION_UID
private static String	RESOURCE
(package private) static long	serialVersionUID
private StatementSpec	subSelect

Fields inherited from interface wt.query.WhereExpression

ADVANCED_QUERY, ADVANCED_QUERY_ENABLED, BIND_PARAMETER, CORRELATED_CLASS_ATTRIBUTES, FROM_COUNT, FROM_INDICIES

Constructor Summary

ExistsExpression()


Supported API: false

ExistsExpression(StatementSpec a_subSelect)


Supported API: true

Method Summary

Object	getBindParameter() Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).
Object	getBindParameterFrom(Vector a_singleBindParameter) Supported API: false
List	getClassAttributes() Supported API: false
List	getCorrelatedClassAttributes() Gets the value of the attribute: correlatedClassAttributes.
private DMLGenerator	getDMLGenerator()
String	getExpression(boolean a_useBind, Vector a_tableInfos, Vector a_aliases) Return string representation of this expression.
int	getFromCount() Gets the value of the attribute: fromCount; Number of FromClause TableExpressions/Aliases that this expression requires.
int[]	getFromIndicies() Gets the value of the attribute: fromIndicies; Indicies for all current expressions relative to a FromClause that will be used for validating and setting aliases when this compostie expression is appended to a statement.
WhereExpression	getJoinConditions(JoinIndex a_joinIndex) This method is to return the join search condition.
WhereExpression	getJoinConditions(Set a_joinIndexSet) This method is to return the join search condition.
WhereExpression	getJoinConditions(String a_alias) This method is to return the join search condition.
WhereExpression	getJoinConditions(String a_alias, boolean a_removed) This method is to return the join search condition.
WhereExpression	getJoinConditions(String a_alias, int a_outerNonJoinFromIndex, boolean a_removed) This method is to return the join search condition.
Set	getJoinIndex() Supported API: false
void	handleCorrelatedAttributes(Vector a_tableInfos, Vector a_aliases) Supported API: false
boolean	isAdvancedQuery() Gets the value of the attribute: advancedQuery; Indicates if the expression uses advanced query capabilities.
boolean	isAdvancedQueryEnabled() Gets the value of the attribute: advancedQueryEnabled; Indicates if advanced query capabilities are enabled.
boolean	isAllJoinConditions(JoinIndex a_joinIndex) Supported API: false
boolean	isAllJoinConditions(Set a_joinIndexSet) Supported API: false
boolean	isAllJoinConditions(String a_alias) Supported API: false
boolean	isAllJoinConditions(String a_alias, boolean a_removed) Supported API: false
boolean	isAllOuterNonJoinConditions() 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(ExistsExpression thisObject, ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source.
void	setAdvancedQueryEnabled(boolean a_AdvancedQueryEnabled) Sets the value of the attribute: advancedQueryEnabled; Indicates if advanced query capabilities are enabled.
int	setAliases(String[] a_aliases, int a_offset) This method sets the aliases for components of the expression.
int	setBindParameterIndicies(int a_offset) Supported API: false
int	setFromIndicies(int[] a_fromIndicies, int a_offset) This method sets the From clause indicies for components of the expression.
int	validate(TableExpression[] a_fromTables, int a_offset) This method validates the expression against the FROM clause.
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, toString, wait, wait, wait

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

bindParameterOffset

private int bindParameterOffset

bindParameterCount

private int bindParameterCount

subSelect

private StatementSpec subSelect

advancedQueryEnabled

private transient boolean advancedQueryEnabled

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

dmlGenerator

private static DMLGenerator dmlGenerator

Constructor Detail

ExistsExpression

public ExistsExpression()

Supported API: false

ExistsExpression

public ExistsExpression(StatementSpec a_subSelect)

Supported API: true

Parameters:

a_subSelect - Specifies instance to use for sub-select.

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(ExistsExpression 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 WhereExpression

Returns:

Object

Throws:

WTException

getFromCount

public int getFromCount()

Gets the value of the attribute: fromCount; Number of FromClause TableExpressions/Aliases that this expression requires.

Supported API: false

Specified by:

getFromCount in interface WhereExpression

Returns:

int

getFromIndicies

public int[] getFromIndicies()

Gets the value of the attribute: fromIndicies; Indicies for all current expressions relative to a FromClause that will be used for validating and setting aliases when this compostie expression is appended to a statement.

Supported API: true

Specified by:

getFromIndicies in interface WhereExpression

Returns:

int[]

isAdvancedQuery

public boolean isAdvancedQuery()
                        throws WTException

Gets the value of the attribute: advancedQuery; Indicates if the expression uses advanced query capabilities.

Supported API: false

Specified by:

isAdvancedQuery in interface WhereExpression

Returns:

boolean

Throws:

WTException

getCorrelatedClassAttributes

public List getCorrelatedClassAttributes()

Gets the value of the attribute: correlatedClassAttributes.

Supported API: false

Specified by:

getCorrelatedClassAttributes in interface WhereExpression

Returns:

List

isAdvancedQueryEnabled

public boolean isAdvancedQueryEnabled()

Gets the value of the attribute: advancedQueryEnabled; Indicates if advanced query capabilities are enabled.

Supported API: false

Specified by:

isAdvancedQueryEnabled in interface WhereExpression

Returns:

boolean

setAdvancedQueryEnabled

public void setAdvancedQueryEnabled(boolean a_AdvancedQueryEnabled)

Sets the value of the attribute: advancedQueryEnabled; Indicates if advanced query capabilities are enabled.

Supported API: false

Specified by:

setAdvancedQueryEnabled in interface WhereExpression

Parameters:

a_AdvancedQueryEnabled -

validate

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

This method validates the expression against the FROM clause.

Supported API: false

Specified by:

validate in interface WhereExpression

Parameters:

a_fromTables - TableExpressions to validate against.

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

Returns:

number of TableExpressions validated

Throws:

QueryException

setAliases

public int setAliases(String[] a_aliases,
                      int a_offset)
               throws QueryException

This method sets the aliases for components of the expression.

Supported API: false

Specified by:

setAliases in interface WhereExpression

Parameters:

a_aliases - Aliases to set.

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

Returns:

number of aliases used

Throws:

QueryException

getExpression

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

Return string representation of this expression.

Supported API: false

Specified by:

getExpression in interface WhereExpression

Parameters:

a_useBind - Indicates if bind parameters should be used.

a_tableInfos -

a_aliases -

Returns:

String

Throws:

QueryException

setFromIndicies

public int setFromIndicies(int[] a_fromIndicies,
                           int a_offset)

This method sets the From clause indicies for components of the expression.

Supported API: true

Specified by:

setFromIndicies in interface WhereExpression

Parameters:

a_fromIndicies - From indicies to set.

a_offset - Offset index into the From indicies array for the next valid From index

Returns:

number of indicies used

getClassAttributes

public List getClassAttributes()

Supported API: false

Specified by:

getClassAttributes in interface WhereExpression

Returns:

List

getJoinConditions

public WhereExpression getJoinConditions(String a_alias)
                                  throws QueryException

This method is to return the join search condition.

Supported API: false

Specified by:

getJoinConditions in interface WhereExpression

Parameters:

a_alias -

Returns:

WhereExpression

Throws:

QueryException

isAllJoinConditions

public boolean isAllJoinConditions(String a_alias)
                            throws QueryException

Supported API: false

Specified by:

isAllJoinConditions in interface WhereExpression

Parameters:

a_alias -

Returns:

boolean

Throws:

QueryException

getJoinIndex

public Set getJoinIndex()

Supported API: false

Specified by:

getJoinIndex in interface WhereExpression

Returns:

Set

getJoinConditions

public WhereExpression getJoinConditions(JoinIndex a_joinIndex)

This method is to return the join search condition.

Supported API: false

Specified by:

getJoinConditions in interface WhereExpression

Parameters:

a_joinIndex -

Returns:

WhereExpression

isAllOuterNonJoinConditions

public boolean isAllOuterNonJoinConditions()

Supported API: false

Specified by:

isAllOuterNonJoinConditions in interface WhereExpression

Returns:

boolean

getBindParameterFrom

public Object getBindParameterFrom(Vector a_singleBindParameter)

Supported API: false

Specified by:

getBindParameterFrom in interface WhereExpression

Parameters:

a_singleBindParameter -

Returns:

Object

setBindParameterIndicies

public int setBindParameterIndicies(int a_offset)

Supported API: false

Specified by:

setBindParameterIndicies in interface WhereExpression

Parameters:

a_offset -

Returns:

int

getJoinConditions

public WhereExpression getJoinConditions(Set a_joinIndexSet)

This method is to return the join search condition.

Supported API: false

Specified by:

getJoinConditions in interface WhereExpression

Parameters:

a_joinIndexSet -

Returns:

WhereExpression

isAllJoinConditions

public boolean isAllJoinConditions(Set a_joinIndexSet)

Supported API: false

Specified by:

isAllJoinConditions in interface WhereExpression

Parameters:

a_joinIndexSet -

Returns:

boolean

isAllJoinConditions

public boolean isAllJoinConditions(JoinIndex a_joinIndex)

Supported API: false

Specified by:

isAllJoinConditions in interface WhereExpression

Parameters:

a_joinIndex -

Returns:

boolean

getJoinConditions

public WhereExpression getJoinConditions(String a_alias,
                                         boolean a_removed)
                                  throws QueryException

This method is to return the join search condition.

Supported API: false

Specified by:

getJoinConditions in interface WhereExpression

Parameters:

a_alias -

a_removed -

Returns:

WhereExpression

Throws:

QueryException

isAllJoinConditions

public boolean isAllJoinConditions(String a_alias,
                                   boolean a_removed)
                            throws QueryException

Supported API: false

Specified by:

isAllJoinConditions in interface WhereExpression

Parameters:

a_alias -

a_removed -

Returns:

boolean

Throws:

QueryException

getJoinConditions

public WhereExpression getJoinConditions(String a_alias,
                                         int a_outerNonJoinFromIndex,
                                         boolean a_removed)
                                  throws QueryException

This method is to return the join search condition.

Supported API: false

Specified by:

getJoinConditions in interface WhereExpression

Parameters:

a_alias -

a_outerNonJoinFromIndex -

a_removed -

Returns:

WhereExpression

Throws:

QueryException

handleCorrelatedAttributes

public void handleCorrelatedAttributes(Vector a_tableInfos,
                                       Vector a_aliases)

Supported API: false

Specified by:

handleCorrelatedAttributes in interface WhereExpression

Parameters:

a_tableInfos -

a_aliases -

getDMLGenerator

private DMLGenerator getDMLGenerator()