net.sf.jailer.datamodel

Class Column

java.lang.Object

net.sf.jailer.datamodel.Column

public class Column
extends Object

Column of a table.

Author:

Ralf Wisser

Field Summary

Fields

Modifier and Type	Field and Description
boolean	isIdentityColumn true if column is identity column.
boolean	isNullable true if column is nullable.
boolean	isVirtual true if column is virtual.
int	length The length (for VARCHAR, DECIMAL, ...) or 0 if type-length is not variable.
String	name The name.
int	precision The precision (for DECIMAL, NUMBER ...) or -1 if precision is not variable.
String	type The type.

Constructor Summary

Constructors

Constructor and Description
Column(String name, String type, int length, int precision) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj) Compares two columns.
Filter	getFilter() Gets filter for server-side column data filtering.
String	getFilterExpression() Gets SQL expression for server-side column data filtering.
int	hashCode()
boolean	isVirtualOrBlocked(Session session) Returns true iff this column cannot be updated.
static Column	parse(String columnDeclaration) Parses a column declaration in SQL syntax.
void	setFilter(Filter filter) Sets filter for server-side column data filtering.
String	toSQL(String columnPrefix) Returns the column definition in SQL syntax.
String	toSQL(String columnPrefix, Map<String,String> typeReplacement) Returns the primary key in SQL syntax.
String	toString() Returns a string representation of the column.

Methods inherited from class java.lang.Object

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

Field Detail

name

public final String name

The name.

type

public final String type

The type.

length

public final int length

The length (for VARCHAR, DECIMAL, ...) or 0 if type-length is not variable.

precision

public final int precision

The precision (for DECIMAL, NUMBER ...) or -1 if precision is not variable.

isIdentityColumn

public boolean isIdentityColumn

true if column is identity column.

isVirtual

public boolean isVirtual

true if column is virtual.

isNullable

public boolean isNullable

true if column is nullable.

Constructor Detail

Column

public Column(String name,
      String type,
      int length,
      int precision)

Constructor.

Parameters:

name - the name (upper-case)

type - the type (in SQL)

length - the length (for VARCHAR, DECIMAL, ...) or 0 if type-length is not variable

precision - the precision (for DECIMAL, NUMBER ...) or -1 if precision is not variable

Method Detail

getFilterExpression

public String getFilterExpression()

Gets SQL expression for server-side column data filtering. Filter.OLD_VALUE_PROP is replaced by column name.

Returns:

SQL expression for server-side column data filtering or null, if no filter is defined for this column

getFilter

public Filter getFilter()

Gets filter for server-side column data filtering.

Returns:

filter for server-side column data filtering or null, if no filter is defined for this column

setFilter

public void setFilter(Filter filter)

Sets filter for server-side column data filtering.

Parameters:

filterExpression - SQL expression for server-side column data filtering or null, if no filter is defined for this column

parse

public static Column parse(String columnDeclaration)

Parses a column declaration in SQL syntax.

Parameters:

columnDeclaration - the column declaration in SQL syntax

Returns:

the column

equals

public boolean equals(Object obj)

Compares two columns.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toSQL

public String toSQL(String columnPrefix,
           Map<String,String> typeReplacement)

Returns the primary key in SQL syntax.

Parameters:

columnPrefix - an optional prefix for each PK-column

typeReplacement - column types replacements

toSQL

public String toSQL(String columnPrefix)

Returns the column definition in SQL syntax.

Parameters:

columnPrefix - an optional prefix for the column name

toString

public String toString()

Returns a string representation of the column.

Overrides:

toString in class Object

isVirtualOrBlocked

public boolean isVirtualOrBlocked(Session session)

Returns true iff this column cannot be updated.

Parameters:

session - the session

Returns:

true iff this column cannot be updated