org.apache.empire.db

Class DBCombinedCmd

java.lang.Object

org.apache.empire.db.DBObject

org.apache.empire.db.DBExpr

org.apache.empire.db.DBCommandExpr

org.apache.empire.db.DBCombinedCmd

All Implemented Interfaces:

Serializable

public class DBCombinedCmd
extends DBCommandExpr

This class is used for building up a partition of a SQL-Command. It handles the insert from a specified key word between two DBCommandExpr objects.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.empire.db.DBCommandExpr

DBCommandExpr.DBCmdColumn, DBCommandExpr.DBCmdQuery

Field Summary

Fields

Modifier and Type	Field and Description
protected String	keyWord
protected DBCommandExpr	left
protected DBCommandExpr	right

Fields inherited from class org.apache.empire.db.DBCommandExpr

cmdQuery, orderBy

Fields inherited from class org.apache.empire.db.DBExpr

CTX_ALIAS, CTX_ALL, CTX_DEFAULT, CTX_FULLNAME, CTX_NAME, CTX_NOPARENTHESES, CTX_VALUE

Constructor Summary

Constructors

Constructor and Description
DBCombinedCmd(DBCommandExpr left, String keyWord, DBCommandExpr right) Constructs a new DBFuncExpr object and sets the specified parameters to this object.

Method Summary

Methods

Modifier and Type	Method and Description
void	addReferencedColumns(Set<DBColumn> list) Internal function to obtain all DBColumnExpr-objects used by this expression.
DBDatabase	getDatabase() Returns the current DBDatabase object.
Object[]	getParamValues() Returns the list of parameter values for a prepared statement.
void	getSelect(StringBuilder buf) Creates the SQL-Command.
DBColumnExpr[]	getSelectExprList() Calls the method dbDBCommandExpr.getSelectExprList from the private variable 'left'.
boolean	isValid()
void	orderBy(DBOrderByExpr... exprs) Adds an order by expression the command

Methods inherited from class org.apache.empire.db.DBCommandExpr

addListExpr, addSQL, clearLimit, clearOrderBy, getCmdColumn, getInsertInto, getInsertInto, getInsertInto, getSelect, intersect, limitRows, orderBy, orderBy, skipRows, union

Methods inherited from class org.apache.empire.db.DBExpr

getObjectValue, getValueClass

Methods inherited from class java.lang.Object

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

Field Detail

left

protected DBCommandExpr left

right

protected DBCommandExpr right

keyWord

protected String keyWord

Constructor Detail

DBCombinedCmd

public DBCombinedCmd(DBCommandExpr left,
             String keyWord,
             DBCommandExpr right)

Constructs a new DBFuncExpr object and sets the specified parameters to this object.

Parameters:

left - the first DBCommandExpr object

keyWord - the key word between the two DBCommandExpr objects

right - the second DBCommandExpr object

Method Detail

isValid

public boolean isValid()

Specified by:

isValid in class DBCommandExpr

getDatabase

public DBDatabase getDatabase()

Returns the current DBDatabase object.

Specified by:

getDatabase in class DBObject

Returns:

the current DBDatabase object

addReferencedColumns

public void addReferencedColumns(Set<DBColumn> list)

Description copied from class: DBExpr

Internal function to obtain all DBColumnExpr-objects used by this expression.

Specified by:

addReferencedColumns in class DBExpr

Parameters:

list - list to which all used column expressions must be added

See Also:

DBExpr.addReferencedColumns(Set)

getSelectExprList

public DBColumnExpr[] getSelectExprList()

Calls the method dbDBCommandExpr.getSelectExprList from the private variable 'left'. Returns a array of all DBColumnExpr object of the Vector: 'select'.

Specified by:

getSelectExprList in class DBCommandExpr

Returns:

returns an array of all DBColumnExpr object of the Vector: 'select'

See Also:

DBCommandExpr.getSelectExprList()

getParamValues

public Object[] getParamValues()

Returns the list of parameter values for a prepared statement.

Specified by:

getParamValues in class DBCommandExpr

Returns:

the list of parameter values for a prepared statement

getSelect

public void getSelect(StringBuilder buf)

Creates the SQL-Command.

Specified by:

getSelect in class DBCommandExpr

Parameters:

buf - the SQL-Command

orderBy

public void orderBy(DBOrderByExpr... exprs)

Description copied from class: DBCommandExpr

Adds an order by expression the command

Overrides:

orderBy in class DBCommandExpr

Parameters:

exprs - vararg of orderBy expressions

See Also:

DBCommandExpr.orderBy(DBColumnExpr, boolean)