Expression (Castor JavaDoc)

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

All Implemented Interfaces:

QueryObject

Direct Known Subclasses:

Column, Function, Parameter
```
public abstract class Expression
extends java.lang.Object
implements 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

Constructors
Constructor Description

Expression()

Constructors
Constructor	Description
`Expression()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.castor.cpa.persistence.sql.query.QueryObject
accept

- 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.

Class Expression

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

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

Constructor Detail

Expression

Method Detail

equal

notEqual

greaterThan

greaterEqual

lessEqual

lessThan

isNull

isNotNull