tap.metadata

Class TAPColumn

java.lang.Object

tap.metadata.TAPColumn

All Implemented Interfaces:

DBColumn

public class TAPColumn
extends java.lang.Object
implements DBColumn

Represent a column as described by the IVOA standard in the TAP protocol definition.

This object representation has exactly the same fields as the column of the table TAP_SCHEMA.columns. But it also provides a way to add other data. For instance, if information not listed in the standard may be stored here, they can be using the function setOtherData(Object). This object can be a single value (integer, string, ...), but also a Map, List, etc...

Important note: A TAPColumn object MUST always have a DB name. That's why, getDBName() returns what getADQLName() returns when no DB name is set. After creation, it is possible to set the DB name with setDBName(String).
This DB name MUST be UNqualified and without double quotes. If a NULL or empty value is provided, getDBName() returns what getADQLName() returns.

Set a table

By default a column is detached (not part of a table). To specify the table in which this column is, you must use TAPTable.addColumn(TAPColumn). By doing this, the table link inside this column will be set automatically and you will be able to get the table with getTable().

Foreign keys

In case this column is linked to one or several of other tables, it will be possible to list all foreign keys where the target columns is with getTargets(). In the same way, it will be possible to list all foreign keys in which this column is a target with getSources(). However, in order to ensure the consistency between all metadata, these foreign key's links are set at the table level by the table itself using addSource(TAPForeignKey) and addTarget(TAPForeignKey).

Version:

2.1 (07/2017)

Author:

Grégory Mantelet (CDS;ARI)

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.ArrayList<TAPForeignKey>	lstSources List all foreign keys in which this column is a target.
protected java.util.ArrayList<TAPForeignKey>	lstTargets List all foreign keys in which this column is a source.
protected java.lang.Object	otherData Let add some information in addition of the ones of the TAP protocol.

Constructor Summary

Constructors

Constructor and Description
TAPColumn(java.lang.String columnName) Build a VARCHAR TAPColumn instance with the given ADQL name.
TAPColumn(java.lang.String columnName, DBType type) Build a TAPColumn instance with the given ADQL name and datatype.
TAPColumn(java.lang.String columnName, DBType type, java.lang.String description) Build a TAPColumn instance with the given ADQL name, datatype and description.
TAPColumn(java.lang.String columnName, DBType type, java.lang.String description, java.lang.String unit) Build a TAPColumn instance with the given ADQL name, type, description and unit.
TAPColumn(java.lang.String columnName, DBType type, java.lang.String description, java.lang.String unit, java.lang.String ucd, java.lang.String utype) Build a TAPColumn instance with the given fields.
TAPColumn(java.lang.String columnName, java.lang.String description) Build a VARCHAR TAPColumn instance with the given ADQL name and description.
TAPColumn(java.lang.String columnName, java.lang.String description, java.lang.String unit) Build a VARCHAR TAPColumn instance with the given ADQL name, description and unit.
TAPColumn(java.lang.String columnName, java.lang.String description, java.lang.String unit, java.lang.String ucd, java.lang.String utype) Build a VARCHAR TAPColumn instance with the given fields.

Method Summary

Modifier and Type	Method and Description
protected void	addSource(TAPForeignKey key) Let add a foreign key in which this column is a target (= which is targeted by another column).
protected void	addTarget(TAPForeignKey key) Let add a foreign key in which this column is a source (= which is targeting another column).
DBColumn	copy() Provide a deep copy (included the other data) of this column.
DBColumn	copy(java.lang.String dbName, java.lang.String adqlName, DBTable dbTable) Warning: Since the type of the other data is not known, the copy of its value can not be done properly.
boolean	equals(java.lang.Object obj)
java.lang.String	getADQLName() Gets the name of this column (without any prefix and double-quotes).
TAPCoosys	getCoosys() Get the used coordinate system.
DBType	getDatatype() Get the type of the column's values.
java.lang.String	getDBName() Gets the name of this column in the "database".
java.lang.String	getDescription() Get the description of this column.
int	getIndex() Get the ordering index of this column inside its table.
java.lang.String	getName() Deprecated. Does not do anything special: just call getADQLName().
int	getNbSources() Get the number of times this column is targeted by another column.
int	getNbTargets() Get the number of times this column is targeting another column.
java.lang.Object	getOtherData() Get the other (piece of) information associated with this column.
java.lang.String	getRawName() Get the full ADQL name of this table, as it has been provided at initialization.
java.util.Iterator<TAPForeignKey>	getSources() Get the list of foreign keys in which this column is a target (= is targeted another column).
DBTable	getTable() Gets the table which contains this DBColumn.
java.util.Iterator<TAPForeignKey>	getTargets() Get the list of foreign keys in which this column is a source (= is targeting another column).
java.lang.String	getUcd() Get the UCD describing the scientific content of this column.
java.lang.String	getUnit() Get the unit of the column's values.
java.lang.String	getUtype() Get the UType associating this column with a data-model.
boolean	isIndexed() Tell whether this column is indexed.
boolean	isNullable() Tell whether this column is nullable.
boolean	isPrincipal() Tell whether this column is one of those returned by default.
boolean	isStd() Tell whether this column is defined by a standard.
protected void	removeAllSources() Remove the fact that this column is a target (= is targeted by another column) in any foreign key in which it was.
protected void	removeAllTargets() Remove the fact that this column is a source (= is targeting another column) in any foreign key in which it was.
protected void	removeSource(TAPForeignKey key) Remove the fact that this column is a target (= is targeted by another column) in the given foreign key.
protected void	removeTarget(TAPForeignKey key) Remove the fact that this column is a source (= is targeting another column) in the given foreign key.
void	setCoosys(TAPCoosys newCoosys) Set the the coordinate system to use.
void	setDatatype(DBType type) Set the type of the column's values.
void	setDBName(java.lang.String name) Change the name that this column MUST have in the database (i.e.
void	setDescription(java.lang.String description) Set the description of this column.
void	setIndex(int columnIndex) Set the ordering index of this column inside its table.
void	setIndexed(boolean indexed) Set whether this column is indexed or not.
void	setNullable(boolean nullable) Set whether this column is nullable or not.
void	setOtherData(java.lang.Object data) Set the other (piece of) information associated with this column.
void	setPrincipal(boolean principal) Set whether this column should be one of those returned by default.
void	setStd(boolean std) Set whether this column is defined by a standard.
protected void	setTable(DBTable table) Set the table in which this column is.
void	setUcd(java.lang.String ucd) Set the UCD describing the scientific content of this column.
void	setUnit(java.lang.String unit) Set the unit of the column's values.
void	setUtype(java.lang.String utype) Set the UType associating this column with a data-model.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

otherData

protected java.lang.Object otherData

Let add some information in addition of the ones of the TAP protocol. Note: This object can be anything: an Integer, a String, a Map, a List, ... Its content is totally free and never used or checked.

lstTargets

protected final java.util.ArrayList<TAPForeignKey> lstTargets

List all foreign keys in which this column is a source.

CAUTION: For consistency consideration, this attribute SHOULD never be modified! It is set by the constructor and filled ONLY by the table.

lstSources

protected final java.util.ArrayList<TAPForeignKey> lstSources

List all foreign keys in which this column is a target.

CAUTION: For consistency consideration, this attribute SHOULD never be modified! It is set by the constructor and filled ONLY by the table.

Constructor Detail

TAPColumn

public TAPColumn(java.lang.String columnName)
          throws java.lang.NullPointerException

Build a VARCHAR TAPColumn instance with the given ADQL name.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by default to VARCHAR.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 DBType type)
          throws java.lang.NullPointerException

Build a TAPColumn instance with the given ADQL name and datatype.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by default to VARCHAR.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

type - Datatype of this column. If NULL, VARCHAR will be the datatype of this column

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

See Also:

setDatatype(DBType)

TAPColumn

public TAPColumn(java.lang.String columnName,
                 java.lang.String description)
          throws java.lang.NullPointerException

Build a VARCHAR TAPColumn instance with the given ADQL name and description.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by default to VARCHAR.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

description - Description of the column's content. May be NULL

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 DBType type,
                 java.lang.String description)
          throws java.lang.NullPointerException

Build a TAPColumn instance with the given ADQL name, datatype and description.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by calling the function setDatatype(DBType) which does not do anything if the given datatype is NULL.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

type - Datatype of this column. If NULL, VARCHAR will be the datatype of this column

description - Description of the column's content. May be NULL

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 java.lang.String description,
                 java.lang.String unit)
          throws java.lang.NullPointerException

Build a VARCHAR TAPColumn instance with the given ADQL name, description and unit.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by default to VARCHAR.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

description - Description of the column's content. May be NULL

unit - Unit of the column's values. May be NULL

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 DBType type,
                 java.lang.String description,
                 java.lang.String unit)
          throws java.lang.NullPointerException

Build a TAPColumn instance with the given ADQL name, type, description and unit.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by calling the function setDatatype(DBType) which does not do anything if the given datatype is NULL.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

type - Datatype of this column. If NULL, VARCHAR will be the datatype of this column

description - Description of the column's content. May be NULL

unit - Unit of the column's values. May be NULL

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 java.lang.String description,
                 java.lang.String unit,
                 java.lang.String ucd,
                 java.lang.String utype)
          throws java.lang.NullPointerException

Build a VARCHAR TAPColumn instance with the given fields.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by default to VARCHAR.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

description - Description of the column's content. May be NULL

unit - Unit of the column's values. May be NULL

ucd - UCD describing the scientific content of this column.

utype - UType associating this column with a data-model.

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

TAPColumn

public TAPColumn(java.lang.String columnName,
                 DBType type,
                 java.lang.String description,
                 java.lang.String unit,
                 java.lang.String ucd,
                 java.lang.String utype)
          throws java.lang.NullPointerException

Build a TAPColumn instance with the given fields.

Note 1: The DB name is set by default to NULL so that getDBName() returns exactly what getADQLName() returns. To set a specific DB name, you MUST call setDBName(String).

Note 2: The datatype is set by calling the function setDatatype(DBType) which does not do anything if the given datatype is NULL.

Important notes on the given ADQL name:

• Any leading or trailing space is immediately deleted.
• If the column name is prefixed by its table name, this prefix is removed by getADQLName() but will be still here when using getRawName(). To work, the table name must be exactly the same as what the function TAPTable.getRawName() of the set table returns.
• Double quotes may surround the single column name. They will be removed by getADQLName() but will still appear in the result of getRawName().

Parameters:

columnName - Name that this column MUST have in ADQL queries. CAN'T be NULL ; this name can never be changed after initialization.

type - Datatype of this column. If NULL, VARCHAR will be the datatype of this column

description - Description of the column's content. May be NULL

unit - Unit of the column's values. May be NULL

ucd - UCD describing the scientific content of this column.

utype - UType associating this column with a data-model.

Throws:

java.lang.NullPointerException - If the given name is null, or if the given string is empty after simplification (i.e. without the surrounding double quotes).

Method Detail

getName

@Deprecated
public final java.lang.String getName()

Deprecated. Does not do anything special: just call getADQLName().

Get the ADQL name (the name this column MUST have in ADQL queries).

Returns:

Its ADQL name.

See Also:

getADQLName()

getADQLName

public final java.lang.String getADQLName()

Description copied from interface: DBColumn

Gets the name of this column (without any prefix and double-quotes).

Specified by:

getADQLName in interface DBColumn

Returns:

Its ADQL name.

getRawName

public final java.lang.String getRawName()

Get the full ADQL name of this table, as it has been provided at initialization.

Returns:

Get the original ADQL name.

Since:

2.1

getDBName

public final java.lang.String getDBName()

Description copied from interface: DBColumn

Gets the name of this column in the "database".

Specified by:

getDBName in interface DBColumn

Returns:

Its DB name.

setDBName

public final void setDBName(java.lang.String name)

Change the name that this column MUST have in the database (i.e. in SQL queries).

Note: If the given value is NULL or an empty string, nothing is done ; the DB name keeps is former value.

Parameters:

name - The new database name of this column.

getTable

public final DBTable getTable()

Description copied from interface: DBColumn

Gets the table which contains this DBColumn.

Specified by:

getTable in interface DBColumn

Returns:

Its table or null if no table is specified.

setTable

protected final void setTable(DBTable table)

Set the table in which this column is.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column.

Important note: If this column was already linked with another TAPTable object, the previous link is removed here, but also in the table (by calling TAPTable.removeColumn(String)).

Parameters:

table - The table that owns this column.

getDescription

public final java.lang.String getDescription()

Get the description of this column.

Returns:

Its description. MAY be NULL

setDescription

public final void setDescription(java.lang.String description)

Set the description of this column.

Parameters:

description - Its new description. MAY be NULL

getUnit

public final java.lang.String getUnit()

Get the unit of the column's values.

Returns:

Its unit. MAY be NULL

setUnit

public final void setUnit(java.lang.String unit)

Set the unit of the column's values.

Parameters:

unit - Its new unit. MAY be NULL

getUcd

public final java.lang.String getUcd()

Get the UCD describing the scientific content of this column.

Returns:

Its UCD. MAY be NULL

setUcd

public final void setUcd(java.lang.String ucd)

Set the UCD describing the scientific content of this column.

Parameters:

ucd - Its new UCD. MAY be NULL

getUtype

public final java.lang.String getUtype()

Get the UType associating this column with a data-model.

Returns:

Its UType. MAY be NULL

setUtype

public final void setUtype(java.lang.String utype)

Set the UType associating this column with a data-model.

Parameters:

utype - Its new UType. MAY be NULL

getDatatype

public final DBType getDatatype()

Get the type of the column's values.

Specified by:

getDatatype in interface DBColumn

Returns:

Its datatype. CAN'T be NULL

setDatatype

public final void setDatatype(DBType type)

Set the type of the column's values.

Note: If the given type is NULL, an UNKNOWN type will be set instead.

Parameters:

type - Its new datatype.

isPrincipal

public final boolean isPrincipal()

Tell whether this column is one of those returned by default.

Returns:

true if this column should be returned by default, false otherwise.

setPrincipal

public final void setPrincipal(boolean principal)

Set whether this column should be one of those returned by default.

Parameters:

principal - true if this column should be returned by default, false otherwise.

isIndexed

public final boolean isIndexed()

Tell whether this column is indexed.

Returns:

true if this column is indexed, false otherwise.

setIndexed

public final void setIndexed(boolean indexed)

Set whether this column is indexed or not.

Parameters:

indexed - true if this column is indexed, false otherwise.

isNullable

public final boolean isNullable()

Tell whether this column is nullable.

Returns:

true if this column is nullable, false otherwise.

Since:

2.0

setNullable

public final void setNullable(boolean nullable)

Set whether this column is nullable or not.

Parameters:

nullable - true if this column is nullable, false otherwise.

Since:

2.0

isStd

public final boolean isStd()

Tell whether this column is defined by a standard.

Returns:

true if this column is defined by a standard, false otherwise.

setStd

public final void setStd(boolean std)

Set whether this column is defined by a standard.

Parameters:

std - true if this column is defined by a standard, false otherwise.

getIndex

public final int getIndex()

Get the ordering index of this column inside its table.

Returns:

Its ordering index.

Since:

2.1

setIndex

public final void setIndex(int columnIndex)

Set the ordering index of this column inside its table.

Parameters:

columnIndex - Its new ordering index.

Since:

2.1

getCoosys

public final TAPCoosys getCoosys()

Get the used coordinate system.

Returns:

Its coordinate system.

Since:

2.1

setCoosys

public final void setCoosys(TAPCoosys newCoosys)

Set the the coordinate system to use.

Parameters:

newCoosys - Its new coordinate system.

Since:

2.1

getOtherData

public java.lang.Object getOtherData()

Get the other (piece of) information associated with this column.

Note: By default, NULL is returned, but it may be any kind of value (Integer, String, Map, List, ...).

Returns:

The other (piece of) information. MAY be NULL

setOtherData

public void setOtherData(java.lang.Object data)

Set the other (piece of) information associated with this column.

Parameters:

data - Another information about this column. MAY be NULL

addTarget

protected void addTarget(TAPForeignKey key)

Let add a foreign key in which this column is a source (= which is targeting another column).

Note: Nothing is done if the given value is NULL.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

Parameters:

key - A foreign key.

getNbTargets

public int getNbTargets()

Get the number of times this column is targeting another column.

Returns:

How many this column is source in a foreign key.

getTargets

public java.util.Iterator<TAPForeignKey> getTargets()

Get the list of foreign keys in which this column is a source (= is targeting another column).

Returns:

List of foreign keys in which this column is a source.

removeTarget

protected void removeTarget(TAPForeignKey key)

Remove the fact that this column is a source (= is targeting another column) in the given foreign key.

Note: Nothing is done if the given value is NULL.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

Parameters:

key - Foreign key in which this column was targeting another column.

removeAllTargets

protected void removeAllTargets()

Remove the fact that this column is a source (= is targeting another column) in any foreign key in which it was.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

addSource

protected void addSource(TAPForeignKey key)

Let add a foreign key in which this column is a target (= which is targeted by another column).

Note: Nothing is done if the given value is NULL.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

Parameters:

key - A foreign key.

getNbSources

public int getNbSources()

Get the number of times this column is targeted by another column.

Returns:

How many this column is target in a foreign key.

getSources

public java.util.Iterator<TAPForeignKey> getSources()

Get the list of foreign keys in which this column is a target (= is targeted another column).

Returns:

List of foreign keys in which this column is a target.

removeSource

protected void removeSource(TAPForeignKey key)

Remove the fact that this column is a target (= is targeted by another column) in the given foreign key.

Note: Nothing is done if the given value is NULL.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

Parameters:

key - Foreign key in which this column was targeted by another column.

removeAllSources

protected void removeAllSources()

Remove the fact that this column is a target (= is targeted by another column) in any foreign key in which it was.

Warning: For consistency reasons, this function SHOULD be called only by the TAPTable that owns this column or that is part of the foreign key.

copy

public DBColumn copy(java.lang.String dbName,
                     java.lang.String adqlName,
                     DBTable dbTable)

Warning: Since the type of the other data is not known, the copy of its value can not be done properly. So, this column and its copy will share the same other data object. If it is also needed to make a deep copy of this other data object, this function MUST be overridden.

Specified by:

copy in interface DBColumn

Parameters:

dbName - Its new DB name.

adqlName - Its new ADQL name.

dbTable - Its new table.

Returns:

A modified copy of this DBColumn.

See Also:

DBColumn.copy(java.lang.String, java.lang.String, adql.db.DBTable)

copy

public DBColumn copy()

Provide a deep copy (included the other data) of this column.

Warning: Since the type of the other data is not known, the copy of its value can not be done properly. So, this column and its copy will share the same other data object. If it is also needed to make a deep copy of this other data object, this function MUST be overridden.

Returns:

The deep copy of this column.

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object