wt.query
Class FromClause

java.lang.Object
  wt.query.FromClause

All Implemented Interfaces:

Cloneable, Externalizable, Serializable

public class FromClause

extends Object

implements Cloneable, Externalizable

This class represents a FROM SQL clause.

Supported API: true

Extendable: false

See Also:

Serialized Form

Field Summary

private String	aliasPrefix
private static String	CLASSNAME
private static String	DEFAULT_ALIAS_PREFIX Default prefix to use.
static long	EXTERNALIZATION_VERSION_UID
static int	NULL_INDEX Supported API: true
protected static long	OLD_FORMAT_VERSION_UID
private static String	RESOURCE
(package private) static long	serialVersionUID
private Vector	tables

Constructor Summary

FromClause()

Method Summary

void	append(TableExpression a_tableExpression) Appends the TableExpression Supported API: false
Object	clone() Returns a deep copy of this object.
String	getAliasAt(int a_index) Returns the specified alias.
Vector	getAliases() Return a Vector of aliases for the tables in the FROM clause.
String	getAliasPrefix() Gets the value of the attribute: aliasPrefix; Prefix string for generating alias names.
static Vector	getClassInfos(Vector a_tables) Return a Vector of ClassInfos for the tables in the FROM clause.
int	getCount() Gets the value of the attribute: count.
int	getPosition(Class a_class) Returns the position of the specified class.
Class	getPrimaryClass() Gets the value of the attribute: primaryClass.
TableExpression	getTableExpressionAt(int a_index) Returns the specified TableExpression Supported API: false
Vector	getTableExpressions()
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(FromClause thisObject, ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source.
void	setAliasPrefix(String a_AliasPrefix) Sets the value of the attribute: aliasPrefix; Prefix string for generating alias names.
void	setTableExpressionAt(TableExpression a_tableExpression, int a_index) Sets the specified TableExpression at the specified index.
String	toString() Returns a string representation of this clause.
void	writeExternal(ObjectOutput output) Writes the non-transient fields of this class to an external source.

Methods inherited from class java.lang.Object

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

NULL_INDEX

public static final int NULL_INDEX

Supported API: true

See Also:

Constant Field Values

aliasPrefix

private String aliasPrefix

DEFAULT_ALIAS_PREFIX

private static final String DEFAULT_ALIAS_PREFIX

Default prefix to use.

See Also:

Constant Field Values

tables

private Vector tables

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

FromClause

public FromClause()

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(FromClause 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

getPrimaryClass

public Class getPrimaryClass()

Gets the value of the attribute: primaryClass.

Supported API: false

Returns:

Class

getCount

public int getCount()

Gets the value of the attribute: count.

Supported API: false

Returns:

int

getAliasPrefix

public String getAliasPrefix()

Gets the value of the attribute: aliasPrefix; Prefix string for generating alias names.

Supported API: true

Returns:

String

setAliasPrefix

public void setAliasPrefix(String a_AliasPrefix)
                    throws WTPropertyVetoException

Sets the value of the attribute: aliasPrefix; Prefix string for generating alias names.

Supported API: true

Parameters:

a_AliasPrefix -

Throws:

WTPropertyVetoException

append

public void append(TableExpression a_tableExpression)

Appends the TableExpression

Supported API: false

Parameters:

a_tableExpression - Object to append

getTableExpressionAt

public TableExpression getTableExpressionAt(int a_index)

Returns the specified TableExpression

Supported API: false

Parameters:

a_index -

Returns:

TableExpression

getAliasAt

public String getAliasAt(int a_index)

Returns the specified alias.

Supported API: true

Parameters:

a_index -

Returns:

String

getPosition

public int getPosition(Class a_class)

Returns the position of the specified class.

Supported API: false

Parameters:

a_class -

Returns:

int

getAliases

public Vector getAliases()

Return a Vector of aliases for the tables in the FROM clause.

Supported API: false

Returns:

Vector

getClassInfos

public static Vector getClassInfos(Vector a_tables)
                            throws QueryException

Return a Vector of ClassInfos for the tables in the FROM clause. If a TableExpression has no table class, then the corresponding element in the Vectro is null.

Supported API: false

Parameters:

a_tables -

Returns:

Vector

Throws:

QueryException

setTableExpressionAt

public void setTableExpressionAt(TableExpression a_tableExpression,
                                 int a_index)

Sets the specified TableExpression at the specified index.

Supported API: false

Parameters:

a_tableExpression -

a_index -

toString

public String toString()

Returns a string representation of this clause.

Returns:

String

clone

public Object clone()

Returns a deep copy of this object.

Returns:

Object

getTableExpressions

public Vector getTableExpressions()