org.castor.cpa.persistence.sql.query.expression
Class Expression

java.lang.Object
  org.castor.cpa.persistence.sql.query.QueryObject
      org.castor.cpa.persistence.sql.query.expression.Expression

Direct Known Subclasses:

Column, Function, Parameter

public abstract class Expression
extends QueryObject

Abstract base class for all expressions.

Version:

$Revision$ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $

Author:

Ahmad Hassan, Ralf Joachim

Constructor Summary

Expression()

Method Summary

Compare	equal(Expression expression) Compare if this expression is equal to the given one.
Compare	greaterEqual(Expression expression) Compare if this expression is greater than or equal to the given one.
Compare	greaterThan(Expression expression) Compare if this expression is greater than the given one.
Predicate	isNotNull() Check if this expression is not null.
Predicate	isNull() Check if this expression is null.
Compare	lessEqual(Expression expression) Compare if this expression is less than or equal to the given one.
Compare	lessThan(Expression expression) Compare if this expression is less than the given one.
Compare	notEqual(Expression expression) Compare if this expression is not equal to the given one.

Methods inherited from class org.castor.cpa.persistence.sql.query.QueryObject

toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Expression

public Expression()

Method Detail

equal

public final Compare equal(Expression expression)

Compare if this expression is equal to the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

notEqual

public final Compare notEqual(Expression expression)

Compare if this expression is not equal to the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

greaterThan

public final Compare greaterThan(Expression expression)

Compare if this expression is greater than the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

greaterEqual

public final Compare greaterEqual(Expression expression)

Compare if this expression is greater than or equal to the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

lessEqual

public final Compare lessEqual(Expression expression)

Compare if this expression is less than or equal to the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

lessThan

public final Compare lessThan(Expression expression)

Compare if this expression is less than the given one.

Parameters:

expression - Right hand side of the compare.

Returns:

Compare condition.

isNull

public final Predicate isNull()

Check if this expression is null.

Returns:

Compare condition.

isNotNull

public final Predicate isNotNull()

Check if this expression is not null.

Returns:

Compare condition.