com.caucho.amber.expr
Class NullExpr

java.lang.Object
  com.caucho.amber.expr.AbstractAmberExpr
      com.caucho.amber.expr.NullExpr

All Implemented Interfaces:

AmberExpr

public class NullExpr
extends AbstractAmberExpr

Null expression for Amber.

Field Summary

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

IS_INNER_JOIN, USES_DATA

Constructor Summary

NullExpr()
Creates a new null expression.

Method Summary

AmberExpr	bindSelect(QueryParser parser) Binds the expression as a select item.
void	generateHaving(CharBuffer cb) Generates the having expression.
void	generateUpdateWhere(CharBuffer cb) Generates the (update) literal.
void	generateWhere(CharBuffer cb) Generates the literal.
java.lang.String	toString()

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

createBoolean, exists, exists, findItem, generateJoin, generateSelect, getCacheObject, getColumnCount, getObject, getType, hasRelationship, isBoolean, replaceJoin, setInternalArgType, usesFrom, usesFrom

Methods inherited from class java.lang.Object

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

Constructor Detail

NullExpr

public NullExpr()

Creates a new null expression.

Method Detail

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

generateWhere

public void generateWhere(CharBuffer cb)

Generates the literal.

Specified by:

generateWhere in interface AmberExpr

Overrides:

generateWhere in class AbstractAmberExpr

generateUpdateWhere

public void generateUpdateWhere(CharBuffer cb)

Generates the (update) literal.

Specified by:

generateUpdateWhere in interface AmberExpr

Overrides:

generateUpdateWhere in class AbstractAmberExpr

generateHaving

public void generateHaving(CharBuffer cb)

Generates the having expression.

Specified by:

generateHaving in interface AmberExpr

Overrides:

generateHaving in class AbstractAmberExpr

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object