com.caucho.amber.expr

Class JoinExpr

java.lang.Object

com.caucho.amber.expr.AbstractAmberExpr

com.caucho.amber.expr.JoinExpr

All Implemented Interfaces:

AmberExpr

Direct Known Subclasses:

EqualJoinExpr, ManyToOneJoinExpr, OneToManyJoinExpr

public abstract class JoinExpr
extends AbstractAmberExpr

Links two tables.

Field Summary

Fields inherited from interface com.caucho.amber.expr.AmberExpr

IS_INNER_JOIN, USES_DATA

Constructor Summary

Constructors

Constructor and Description
JoinExpr()

Method Summary

Modifier and Type	Method and Description
AmberExpr	bindSelect(QueryParser parser) Binds the expression as a select item.
boolean	bindToFromItem() Binds the expression as a select item.
FromItem	getJoinParent() Returns the parent join clause.
FromItem	getJoinTarget() Returns the target join clause.
AmberExpr	getWhere() Returns the where clause once the parent is removed
boolean	isBoolean() Returns true for a boolean expression.
boolean	isDependent(FromItem parent, LinkColumns link) Returns true if the given from item is the parent link.
AmberExpr	replace(IdExpr id) Returns the id expr with the joined expression.
AmberExpr	replace(KeyColumnExpr id) Returns the id expr with the joined expression.

Methods inherited from class com.caucho.amber.expr.AbstractAmberExpr

createBoolean, exists, exists, findItem, generateHaving, generateJoin, generateSelect, generateUpdateWhere, generateWhere, getCacheObject, getColumnCount, getObject, getType, hasRelationship, replaceJoin, setInternalArgType, usesFrom, usesFrom

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinExpr

public JoinExpr()

Method Detail

isBoolean

public boolean isBoolean()

Returns true for a boolean expression.

Specified by:

isBoolean in interface AmberExpr

Overrides:

isBoolean in class AbstractAmberExpr

bindSelect

public AmberExpr bindSelect(QueryParser parser)

Binds the expression as a select item.

Specified by:

bindSelect in interface AmberExpr

Specified by:

bindSelect in class AbstractAmberExpr

bindToFromItem

public boolean bindToFromItem()

Binds the expression as a select item.

getJoinTarget

public FromItem getJoinTarget()

Returns the target join clause.

getJoinParent

public FromItem getJoinParent()

Returns the parent join clause.

isDependent

public boolean isDependent(FromItem parent,
                           LinkColumns link)

Returns true if the given from item is the parent link.

getWhere

public AmberExpr getWhere()

Returns the where clause once the parent is removed

replace

public AmberExpr replace(KeyColumnExpr id)

Returns the id expr with the joined expression.

replace

public AmberExpr replace(IdExpr id)

Returns the id expr with the joined expression.