org.apache.torque.engine.database.model
Class Index

java.lang.Object
  org.apache.torque.engine.database.model.Index

Direct Known Subclasses:

Unique

public class Index

extends java.lang.Object

Information about indices of a table.

Version:

$Id: Index.java,v 1.2.2.3 2004/08/23 00:29:52 seade Exp $

Author:

Jason van Zyl,

Constructor Summary

	Index() Creates a new instance with default characteristics (no name or parent table, small column list size allocation, non-unique).
protected	Index(Table table, java.util.List indexColumns) Creates a new instance for the list of columns composing an index.

Method Summary

void	addColumn(org.xml.sax.Attributes attrib) Adds a new column to an index.
java.lang.String	getColumnList() Return a comma delimited string of the columns which compose this index.
protected java.util.List	getColumnNames() Returns the list of names of the columns referenced by this index.
java.util.List	getColumns() Return the list of local columns.
java.lang.String	getName() Gets the name of this index.
Table	getTable() Get the parent Table of the index
java.lang.String	getTableName() Returns the Name of the table the index is in
boolean	isUnique() Returns the uniqueness of this index.
void	loadFromXML(org.xml.sax.Attributes attrib) Imports index from an XML specification
void	setName(java.lang.String name) Set the name of this index.
void	setTable(Table parent) Set the parent Table of the index
java.lang.String	toString() String representation of the index.

Methods inherited from class java.lang.Object

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

Constructor Detail

Index

public Index()

Creates a new instance with default characteristics (no name or parent table, small column list size allocation, non-unique).

Index

protected Index(Table table,
                java.util.List indexColumns)
         throws EngineException

Creates a new instance for the list of columns composing an index. Otherwise performs as Index().

Parameters:

table - The table this index is associated with.

indexColumns - The list of Column objects which make up this index. Cannot be empty.

Throws:

EngineException - Error generating name.

See Also:

Index()

Method Detail

loadFromXML

public void loadFromXML(org.xml.sax.Attributes attrib)

Imports index from an XML specification

Parameters:

attrib - the xml attributes

isUnique

public boolean isUnique()

Returns the uniqueness of this index.

Returns:

the uniqueness of this index

getName

public java.lang.String getName()

Gets the name of this index.

Returns:

the name of this index

setName

public void setName(java.lang.String name)

Set the name of this index.

Parameters:

name - the name of this index

setTable

public void setTable(Table parent)

Set the parent Table of the index

Parameters:

parent - the table

getTable

public Table getTable()

Get the parent Table of the index

Returns:

the table

getTableName

public java.lang.String getTableName()

Returns the Name of the table the index is in

Returns:

the name of the table

addColumn

public void addColumn(org.xml.sax.Attributes attrib)

Adds a new column to an index.

Parameters:

attrib - xml attributes for the column

getColumnList

public java.lang.String getColumnList()

Return a comma delimited string of the columns which compose this index.

Returns:

a list of column names

getColumns

public java.util.List getColumns()

Return the list of local columns. You should not edit this list.

Returns:

a list of columns

getColumnNames

protected java.util.List getColumnNames()

Returns the list of names of the columns referenced by this index. Slightly over-allocates the list's buffer (just in case more elements are going to be added, such as when a name is being generated). Feel free to modify this list.

Returns:

a list of column names

toString

public java.lang.String toString()

String representation of the index. This is an xml representation.

Returns:

a xml representation