CoalesceNode

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

All Implemented Interfaces:

AliasableNode
```
public class CoalesceNode
extends Node
implements AliasableNode
```
INTERNAL
Purpose: Represent an COALESCE in EJBQL
Responsibilities:
- Generate the correct expression for an COALESCE in EJBQL
Since:

EclipseLink 1.2

Author:

tware

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

Constructor Summary

Constructors
Constructor Description

CoalesceNode()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext generationContext)`	INTERNAL Apply this node to the passed query
`Expression`	`generateExpression(GenerationContext context)`	INTERNAL Generate the a new EclipseLink Coalesce expression for this node.
`java.util.List`	`getClauses()`
`boolean`	`isAliasableNode()`
`void`	`setClauses(java.util.List clauses)`
`java.lang.String`	`toString(int indent)`
`void`	`validate(ParseTreeContext context)`	INTERNAL Validate node and calculate 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, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveAttribute, resolveClass, resolveClass, resolveMapping, resolveMapping, setAlias, setColumn, setLeft, setLine, setRight, setType, 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
  - CoalesceNode
```
public CoalesceNode()
```
- Method Detail
  - applyToQuery
```
public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext generationContext)
```
    INTERNAL Apply this node to the passed query
    
    Overrides:
    
    applyToQuery in class Node
  - generateExpression
```
public Expression generateExpression(GenerationContext context)
```
    INTERNAL Generate the a new EclipseLink Coalesce expression for this node.
    
    Overrides:
    
    generateExpression in class Node
  - validate
```
public void validate(ParseTreeContext context)
```
    Description copied from class: Node
    
    INTERNAL Validate node and calculate its type.
    
    Overrides:
    
    validate in class Node
  - getClauses
```
public java.util.List getClauses()
```
  - setClauses
```
public void setClauses(java.util.List clauses)
```
  - isAliasableNode
```
public boolean isAliasableNode()
```
    Overrides:
    
    isAliasableNode in class Node
  - toString
```
public java.lang.String toString(int indent)
```
    Overrides:
    
    toString in class Node