com.samskivert.jdbc.depot.clause
Class Join

java.lang.Object
  com.samskivert.jdbc.depot.clause.QueryClause
      com.samskivert.jdbc.depot.clause.Join

All Implemented Interfaces:

SQLExpression

public class Join
extends QueryClause

Represents a JOIN.

Nested Class Summary

static class

Join.Type Indicates the join type to be used.

Field Summary

protected Class<? extends PersistentRecord>	_joinClass The class of the table we're to join against.
protected SQLExpression	_joinCondition The condition used to join in the new table.
protected Join.Type	_type Indicates the type of join to be performed.

Constructor Summary

Join(Class<? extends PersistentRecord> joinClass, SQLExpression joinCondition)

Join(Class<? extends PersistentRecord> pClass, String pCol, Class<? extends PersistentRecord> joinClass, String jCol)

Join(ColumnExp primary, ColumnExp join)

Method Summary

void	accept(ExpressionVisitor builder) Most uses of this class have been implemented with a visitor pattern.
void	addClasses(Collection<Class<? extends PersistentRecord>> classSet) Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation.
Class<? extends PersistentRecord>	getJoinClass()
SQLExpression	getJoinCondition()
Join.Type	getType()
Join	setType(Join.Type type) Configures the type of join to be performed.

Methods inherited from class java.lang.Object

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

Field Detail

_type

protected Join.Type _type

Indicates the type of join to be performed.

_joinClass

protected Class<? extends PersistentRecord> _joinClass

The class of the table we're to join against.

_joinCondition

protected SQLExpression _joinCondition

The condition used to join in the new table.

Constructor Detail

Join

public Join(Class<? extends PersistentRecord> pClass,
            String pCol,
            Class<? extends PersistentRecord> joinClass,
            String jCol)

Join

public Join(ColumnExp primary,
            ColumnExp join)

Join

public Join(Class<? extends PersistentRecord> joinClass,
            SQLExpression joinCondition)

Method Detail

setType

public Join setType(Join.Type type)

Configures the type of join to be performed.

getType

public Join.Type getType()

getJoinClass

public Class<? extends PersistentRecord> getJoinClass()

getJoinCondition

public SQLExpression getJoinCondition()

accept

public void accept(ExpressionVisitor builder)
            throws Exception

Description copied from interface: SQLExpression

Most uses of this class have been implemented with a visitor pattern. Create your own ExpressionVisitor and call this method with it.

Throws:

Exception

See Also:

SQLBuilder

addClasses

public void addClasses(Collection<Class<? extends PersistentRecord>> classSet)

Description copied from interface: SQLExpression

Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation. This method should recurse into any subordinate state that may in turn bring in new classes so that sub-queries work correctly.