org.hibernate.sql

Class JoinFragment

java.lang.Object

org.hibernate.sql.JoinFragment

Direct Known Subclasses:

ANSIJoinFragment, OracleJoinFragment, QueryJoinFragment, Sybase11JoinFragment

public abstract class JoinFragment
extends Object

An abstract SQL join fragment renderer

Author:

Gavin King

Field Summary

Fields

Modifier and Type	Field and Description
static int	FULL_JOIN Deprecated. use JoinType.FULL_JOIN instead.
static int	INNER_JOIN Deprecated. use JoinType.INNER_JOIN instead.
static int	LEFT_OUTER_JOIN Deprecated. use JoinType.LEFT_OUTER_JOIN instead.
static int	RIGHT_OUTER_JOIN Deprecated. use JoinType.RIGHT_OUTER_JOIN instead.

Constructor Summary

Constructors

Constructor and Description
JoinFragment()

Method Summary

Modifier and Type	Method and Description
abstract boolean	addCondition(String condition) Adds a free-form condition fragment
protected boolean	addCondition(StringBuilder buffer, String on) Appends the 'on' condition to the buffer, returning true if the condition was added.
abstract void	addCondition(String alias, String[] fkColumns, String[] pkColumns) Adds a condition to the join fragment.
abstract void	addCrossJoin(String tableName, String alias) Adds a cross join to the specified table.
void	addFragment(JoinFragment ojf) Adds another join fragment to this one.
abstract void	addJoin(String tableName, String alias, String[] fkColumns, String[] pkColumns, JoinType joinType) Adds a join.
abstract void	addJoin(String tableName, String alias, String[] fkColumns, String[] pkColumns, JoinType joinType, String on) Adds a join, with an additional ON clause fragment
abstract void	addJoins(String fromFragment, String whereFragment) Free-form form of adding theta-style joins taking the necessary FROM and WHERE clause fragments
abstract JoinFragment	copy() Make a copy.
boolean	hasFilterCondition() True if the where fragment is from a filter condition.
boolean	hasThetaJoins() Determine if the join fragment contained any theta-joins.
void	setHasFilterCondition(boolean b)
void	setHasThetaJoins(boolean hasThetaJoins)
abstract String	toFromFragmentString() Render this fragment to its FROM clause portion
abstract String	toWhereFragmentString() Render this fragment to its WHERE clause portion

Methods inherited from class java.lang.Object

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

Field Detail

INNER_JOIN

@Deprecated
public static final int INNER_JOIN

Deprecated. use JoinType.INNER_JOIN instead.

Specifies an inner join.

FULL_JOIN

@Deprecated
public static final int FULL_JOIN

Deprecated. use JoinType.FULL_JOIN instead.

Specifies a full join

LEFT_OUTER_JOIN

@Deprecated
public static final int LEFT_OUTER_JOIN

Deprecated. use JoinType.LEFT_OUTER_JOIN instead.

Specifies a left join.

RIGHT_OUTER_JOIN

@Deprecated
public static final int RIGHT_OUTER_JOIN

Deprecated. use JoinType.RIGHT_OUTER_JOIN instead.

Specifies a right join.

Constructor Detail

JoinFragment

public JoinFragment()

Method Detail

addJoin

public abstract void addJoin(String tableName,
                             String alias,
                             String[] fkColumns,
                             String[] pkColumns,
                             JoinType joinType)

Adds a join.

Parameters:

tableName - The name of the table to be joined

alias - The alias to apply to the joined table

fkColumns - The names of the columns which reference the joined table

pkColumns - The columns in the joined table being referenced

joinType - The type of join

addJoin

public abstract void addJoin(String tableName,
                             String alias,
                             String[] fkColumns,
                             String[] pkColumns,
                             JoinType joinType,
                             String on)

Adds a join, with an additional ON clause fragment

Parameters:

tableName - The name of the table to be joined

alias - The alias to apply to the joined table

fkColumns - The names of the columns which reference the joined table

pkColumns - The columns in the joined table being referenced

joinType - The type of join

on - The additional ON fragment

addCrossJoin

public abstract void addCrossJoin(String tableName,
                                  String alias)

Adds a cross join to the specified table.

Parameters:

tableName - The name of the table to be joined

alias - The alias to apply to the joined table

addJoins

public abstract void addJoins(String fromFragment,
                              String whereFragment)

Free-form form of adding theta-style joins taking the necessary FROM and WHERE clause fragments

Parameters:

fromFragment - The FROM clause fragment

whereFragment - The WHERE clause fragment

toFromFragmentString

public abstract String toFromFragmentString()

Render this fragment to its FROM clause portion

Returns:

The FROM clause portion of this fragment

toWhereFragmentString

public abstract String toWhereFragmentString()

Render this fragment to its WHERE clause portion

Returns:

The WHERE clause portion of this fragment

addCondition

public abstract void addCondition(String alias,
                                  String[] fkColumns,
                                  String[] pkColumns)

Adds a condition to the join fragment.

Parameters:

alias - The alias of the joined table

fkColumns - The names of the columns which reference the joined table

pkColumns - The columns in the joined table being referenced

addCondition

public abstract boolean addCondition(String condition)

Adds a free-form condition fragment

Parameters:

condition - The fragment

Returns:

true if the condition was added

copy

public abstract JoinFragment copy()

Make a copy.

Returns:

The copy.

addFragment

public void addFragment(JoinFragment ojf)

Adds another join fragment to this one.

Parameters:

ojf - The other join fragment

addCondition

protected boolean addCondition(StringBuilder buffer,
                               String on)

Appends the 'on' condition to the buffer, returning true if the condition was added. Returns false if the 'on' condition was empty.

Parameters:

buffer - The buffer to append the 'on' condition to.

on - The 'on' condition.

Returns:

Returns true if the condition was added, false if the condition was already in 'on' string.

hasFilterCondition

public boolean hasFilterCondition()

True if the where fragment is from a filter condition.

Returns:

True if the where fragment is from a filter condition.

setHasFilterCondition

public void setHasFilterCondition(boolean b)

hasThetaJoins

public boolean hasThetaJoins()

Determine if the join fragment contained any theta-joins.

Returns:

true if the fragment contained theta joins

setHasThetaJoins

public void setHasThetaJoins(boolean hasThetaJoins)