com.caucho.amber.expr

Class AbstractAmberExpr

java.lang.Object

com.caucho.amber.expr.AbstractAmberExpr

All Implemented Interfaces:

AmberExpr

Direct Known Subclasses:

AbstractPathExpr, AllExpr, AmberColumnExpr, AndExpr, AnyExpr, ArgExpr, BetweenExpr, BinaryExpr, BooleanColumnExpr, EmptyExpr, EnumExpr, ExistsExpr, FunExpr, InExpr, JoinExpr, KeyPropertyExpr, LikeExpr, LiteralExpr, LoadExpr, MapFieldExpr, MemberExpr, NullExpr, OrExpr, SubSelectExpr, UnaryExpr

public abstract class AbstractAmberExpr
extends java.lang.Object
implements AmberExpr

Represents an Amber query expression

Field Summary

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

IS_INNER_JOIN, USES_DATA

Constructor Summary

Constructors

Constructor and Description
AbstractAmberExpr()

Method Summary

Modifier and Type	Method and Description
abstract AmberExpr	bindSelect(QueryParser parser) Binds the expression as a select item.
AmberExpr	createBoolean() Converts to a boolean expression.
boolean	exists() Returns true if the expression must exist
boolean	exists(FromItem from) Returns true if the expression must exist
EntityItem	findItem(AmberConnection aConn, java.sql.ResultSet rs, int index) Returns the object for the expr.
void	generateHaving(CharBuffer cb) Generates the having expression.
void	generateJoin(CharBuffer cb) Generates the where in a join expression.
void	generateSelect(CharBuffer cb) Generates the select expression.
void	generateUpdateWhere(CharBuffer cb) Generates the (update) where expression.
void	generateWhere(CharBuffer cb) Generates the where expression.
java.lang.Object	getCacheObject(AmberConnection aConn, java.sql.ResultSet rs, int index) Returns the object for the expr.
int	getColumnCount() Returns the number of columns.
java.lang.Object	getObject(AmberConnection aConn, java.sql.ResultSet rs, int index) Returns the object for the expr.
AmberType	getType() Returns the expr type.
boolean	hasRelationship() Returns true if this expr has any relationship.
boolean	isBoolean() Returns true for a boolean expression.
AmberExpr	replaceJoin(JoinExpr join) Returns true if the expression uses the from item.
void	setInternalArgType(AmberExpr other) Binds the argument type based on another expr.
boolean	usesFrom(FromItem from, int type) Returns true if the expression uses the from item.
boolean	usesFrom(FromItem from, int type, boolean isNot) Returns true if the expression uses the from item.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractAmberExpr

public AbstractAmberExpr()

Method Detail

isBoolean

public boolean isBoolean()

Returns true for a boolean expression.

Specified by:

isBoolean in interface AmberExpr

getType

public AmberType getType()

Returns the expr type.

Specified by:

getType in interface AmberExpr

hasRelationship

public boolean hasRelationship()

Returns true if this expr has any relationship.

Specified by:

hasRelationship in interface AmberExpr

createBoolean

public AmberExpr createBoolean()
                        throws QueryParseException

Converts to a boolean expression.

Specified by:

createBoolean in interface AmberExpr

Throws:

QueryParseException

bindSelect

public abstract AmberExpr bindSelect(QueryParser parser)

Binds the expression as a select item.

Specified by:

bindSelect in interface AmberExpr

usesFrom

public boolean usesFrom(FromItem from,
                        int type)

Returns true if the expression uses the from item.

Specified by:

usesFrom in interface AmberExpr

usesFrom

public boolean usesFrom(FromItem from,
                        int type,
                        boolean isNot)

Returns true if the expression uses the from item.

Specified by:

usesFrom in interface AmberExpr

exists

public boolean exists(FromItem from)

Returns true if the expression must exist

Specified by:

exists in interface AmberExpr

exists

public boolean exists()

Returns true if the expression must exist

Specified by:

exists in interface AmberExpr

replaceJoin

public AmberExpr replaceJoin(JoinExpr join)

Returns true if the expression uses the from item.

Specified by:

replaceJoin in interface AmberExpr

getColumnCount

public int getColumnCount()

Returns the number of columns.

generateWhere

public void generateWhere(CharBuffer cb)

Generates the where expression.

Specified by:

generateWhere in interface AmberExpr

generateUpdateWhere

public void generateUpdateWhere(CharBuffer cb)

Generates the (update) where expression.

Specified by:

generateUpdateWhere in interface AmberExpr

generateHaving

public void generateHaving(CharBuffer cb)

Generates the having expression.

Specified by:

generateHaving in interface AmberExpr

generateJoin

public void generateJoin(CharBuffer cb)

Generates the where in a join expression.

Specified by:

generateJoin in interface AmberExpr

generateSelect

public void generateSelect(CharBuffer cb)

Generates the select expression.

Specified by:

generateSelect in interface AmberExpr

getObject

public java.lang.Object getObject(AmberConnection aConn,
                                  java.sql.ResultSet rs,
                                  int index)
                           throws java.sql.SQLException

Returns the object for the expr.

Specified by:

getObject in interface AmberExpr

Throws:

java.sql.SQLException

getCacheObject

public java.lang.Object getCacheObject(AmberConnection aConn,
                                       java.sql.ResultSet rs,
                                       int index)
                                throws java.sql.SQLException

Returns the object for the expr.

Specified by:

getCacheObject in interface AmberExpr

Throws:

java.sql.SQLException

findItem

public EntityItem findItem(AmberConnection aConn,
                           java.sql.ResultSet rs,
                           int index)
                    throws java.sql.SQLException

Returns the object for the expr.

Specified by:

findItem in interface AmberExpr

Throws:

java.sql.SQLException

setInternalArgType

public void setInternalArgType(AmberExpr other)

Binds the argument type based on another expr.

Specified by:

setInternalArgType in interface AmberExpr