SubstringNode

java.lang.Object
- org.eclipse.persistence.internal.jpa.parsing.Node
- - org.eclipse.persistence.internal.jpa.parsing.FunctionalExpressionNode
  - - org.eclipse.persistence.internal.jpa.parsing.StringFunctionNode
    - - org.eclipse.persistence.internal.jpa.parsing.SubstringNode

All Implemented Interfaces:

AliasableNode
```
public class SubstringNode
extends StringFunctionNode
```
INTERNAL
Purpose: Represent a SUBSTRING
Responsibilities:
- Generate the correct expression for SUBSTRING
Since:

TopLink 4.0

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

SubstringNode()
SubstringNode constructor comment.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression`	`generateExpression(GenerationContext context)`	INTERNAL Generate the EclipseLink expression for this node
`Node`	`qualifyAttributeAccess(ParseTreeContext context)`	INTERNAL Check the child nodes for an unqualified field access and if so, replace them by a qualified field access.
`void`	`setStartPosition(Node newStartPosition)`	Insert the method's description here.
`void`	`setStringLength(Node newStringLength)`	Insert the method's description here.
`void`	`validate(ParseTreeContext context)`	INTERNAL Validate node and calculate its type.

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.FunctionalExpressionNode
applyToQuery, isAliasableNode

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, 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
  - SubstringNode
```
public SubstringNode()
```
    SubstringNode constructor comment.
- Method Detail
  - qualifyAttributeAccess
```
public Node qualifyAttributeAccess(ParseTreeContext context)
```
    INTERNAL Check the child nodes for an unqualified field access and if so, replace them by a qualified field access.
    
    Overrides:
    
    qualifyAttributeAccess in class Node
  - validate
```
public void validate(ParseTreeContext context)
```
    INTERNAL Validate node and calculate its type.
    
    Overrides:
    
    validate in class Node
  - generateExpression
```
public Expression generateExpression(GenerationContext context)
```
    INTERNAL Generate the EclipseLink expression for this node
    
    Overrides:
    
    generateExpression in class Node
  - setStartPosition
```
public void setStartPosition(Node newStartPosition)
```
    Insert the method's description here. Creation date: (1/19/01 3:41:55 PM)
    
    Parameters:
    
    newStartPosition - java.lang.Integer
  - setStringLength
```
public void setStringLength(Node newStringLength)
```
    Insert the method's description here. Creation date: (1/19/01 3:42:26 PM)
    
    Parameters:
    
    newStringLength - java.lang.Integer