QueryNode (EclipseLink Core 3.0.4-RC1 API)

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

Direct Known Subclasses:

ModifyNode, SelectNode
```
public abstract class QueryNode
extends MajorNode
```
INTERNAL: This node contains the information about what kind of query is represented it's tree (e.g. Select, Update etc.) Subclasses of this node will contain query specific behavior.

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

Constructor Summary

Constructors
Constructor Description

QueryNode()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract void`	`applyToQuery(DatabaseQuery theQuery, GenerationContext context)`	INTERNAL Apply this node to the passed query
`abstract DatabaseQuery`	`createDatabaseQuery(ParseTreeContext context)`	INTERNAL Returns a DatabaseQuery instance according to the kind of the query the owning ParseTree represents: SELECT, UPDATE or DELETE.
`abstract Expression`	`generateExpression(GenerationContext context)`	INTERNAL Return a EclipseLink expression generated using the left node
`ParseTree`	`getParseTree()`
`Class`	`getReferenceClass(GenerationContext genContext)`	Compute the Reference class for this query
`boolean`	`isDeleteNode()`
`boolean`	`isSelectNode()`
`boolean`	`isUpdateNode()`
`abstract Class`	`resolveClass(GenerationContext context)`	Return the class represented in this node.
`void`	`setParseTree(ParseTree parseTree)`	Set the parseTree

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.MajorNode
getContext, setContext

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

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

Constructor Detail
- QueryNode
```
public QueryNode()
```

Method Detail

createDatabaseQuery
```
public abstract DatabaseQuery createDatabaseQuery(ParseTreeContext context)
```
INTERNAL Returns a DatabaseQuery instance according to the kind of the query the owning ParseTree represents: SELECT, UPDATE or DELETE.

applyToQuery

public abstract void applyToQuery(DatabaseQuery theQuery,
                                  GenerationContext context)

INTERNAL Apply this node to the passed query

generateExpression
```
public abstract Expression generateExpression(GenerationContext context)
```
INTERNAL Return a EclipseLink expression generated using the left node

Overrides:

generateExpression in class Node

getReferenceClass
```
public Class getReferenceClass(GenerationContext genContext)
```
Compute the Reference class for this query

Parameters:

genContext -

Returns:

the class this query is querying for

isSelectNode
```
public boolean isSelectNode()
```

isUpdateNode
```
public boolean isUpdateNode()
```

isDeleteNode
```
public boolean isDeleteNode()
```

resolveClass
```
public abstract Class resolveClass(GenerationContext context)
```
Return the class represented in this node.

Overrides:

resolveClass in class Node

setParseTree

public void setParseTree(ParseTree parseTree)

Set the parseTree

getParseTree
```
public ParseTree getParseTree()
```