MinusNode

java.lang.Object
- org.eclipse.persistence.internal.jpa.parsing.Node
- - org.eclipse.persistence.internal.jpa.parsing.BinaryOperatorNode
  - - org.eclipse.persistence.internal.jpa.parsing.MinusNode

All Implemented Interfaces:

AliasableNode
```
public class MinusNode
extends BinaryOperatorNode
implements AliasableNode
```
INTERNAL
Purpose: Represent a '-' in EJBQL
Responsibilities:
- Generate the correct expression for a '-'
Since:

July 2003

Author:

Jon Driscoll and Joel Lucuik

Field Summary
- Fields inherited from class org.eclipse.persistence.internal.jpa.parsing.Node
  alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors
Constructor Description

MinusNode()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context)`	INTERNAL Apply this node to the passed query
`Expression`	`generateExpression(GenerationContext context)`	INTERNAL Generate the expression.
`boolean`	`isAliasableNode()`
`boolean`	`isMinusNode()`	INTERNAL Is this node a Minus node
`void`	`validate(ParseTreeContext context)`	INTERNAL Validate node and calculates its type.

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.Node
addToExpression, appendExpression, getAlias, getAsString, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAggregateNode, isAttributeNode, isConstructorNode, isCountNode, isDivideNode, isDotNode, isEscape, isLiteralNode, isMapKeyNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveAttribute, resolveClass, resolveClass, resolveMapping, resolveMapping, setAlias, setColumn, setLeft, setLine, setRight, setType, toString, toString, toStringDisplayName, toStringIndent, validateParameter

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.persistence.internal.jpa.parsing.AliasableNode
getAlias, setAlias

- Constructor Detail
  - MinusNode
```
public MinusNode()
```
- Method Detail
  - applyToQuery
```
public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext context)
```
    INTERNAL Apply this node to the passed query
    
    Overrides:
    
    applyToQuery in class Node
  - validate
```
public void validate(ParseTreeContext context)
```
    INTERNAL Validate node and calculates its type.
    
    Overrides:
    
    validate in class BinaryOperatorNode
  - generateExpression
```
public Expression generateExpression(GenerationContext context)
```
    INTERNAL Generate the expression. The steps are: 1. Generate the expression for the left node 2. Add the .subtract to the where clause returned from step 1 3. Generate the expression for the right side and use it as the parameter for the .subtract() 4. Return the completed where clause to the caller
    
    Overrides:
    
    generateExpression in class Node
  - isMinusNode
```
public boolean isMinusNode()
```
    Description copied from class: Node
    
    INTERNAL Is this node a Minus node
    
    Overrides:
    
    isMinusNode in class Node
  - isAliasableNode
```
public boolean isAliasableNode()
```
    Overrides:
    
    isAliasableNode in class Node