Package org.eclipse.persistence.internal.jpa.parsing

Class DotNode

java.lang.Object

org.eclipse.persistence.internal.jpa.parsing.Node

org.eclipse.persistence.internal.jpa.parsing.LogicalOperatorNode

org.eclipse.persistence.internal.jpa.parsing.DotNode

All Implemented Interfaces:

AliasableNode

public class DotNode
extends LogicalOperatorNode
implements AliasableNode

INTERNAL

Purpose: This node represents an 'DOT' (i.e. '.') on the input stream. The left and right will depend on the input stream.

Responsibilities:

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
DotNode()

Method Summary

Modifier and Type	Method	Description
void	applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context)	INTERNAL Apply this node to the passed query
boolean	endsWithCollectionField(GenerationContext context)	INTERNAL (): Answer true if the node has a left and right, and the right represents a collection mapping.
boolean	endsWithDirectToField(GenerationContext context)	INTERNAL (): Answer true if the SELECTed node has a left and right, and the right represents a direct-to-field mapping.
Expression	generateExpression(GenerationContext context)	INTERNAL Return a TopLink expression by getting the required variables using the left and right nodes "emp.address.city" = builder.get("address").get("city")
String	getAsString()	INTERNAL Get the string representation of this node.
Node	getLeftMostNode()	INTERNAL Return the left most node of a dot expr, so return 'a' for 'a.b.c'.
Node	getRightMostNode()	INTERNAL Return the right most node of a dot expr, so return 'c' for 'a.b.c'.
Object	getTypeForMapKey(ParseTreeContext context)
Class	getTypeOfDirectToField(GenerationContext context)	INTERNAL Returns the attribute type if the right represents a direct-to-field mapping.
boolean	isAliasableNode()
boolean	isDotNode()	INTERNAL Yes, this is a dot node
Node	qualifyAttributeAccess(ParseTreeContext context)	INTERNAL Check the left child node for an unqualified field access.
String	resolveAttribute()	INTERNAL Answer the name of the attribute which is represented by the receiver's right node.
Class	resolveClass(GenerationContext context)	resolveClass: Answer the class which results from traversing the mappings for the receiver's nodes
DatabaseMapping	resolveMapping(GenerationContext context)	INTERNAL Answer the mapping resulting from traversing the receiver's nodes
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, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAggregateNode, isAttributeNode, isConstructorNode, isCountNode, isDivideNode, isEscape, isLiteralNode, isMapKeyNode, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, resolveClass, 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

DotNode

public DotNode()

Method Detail

applyToQuery

public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext context)

INTERNAL Apply this node to the passed query

Overrides:

applyToQuery in class Node

qualifyAttributeAccess

public Node qualifyAttributeAccess(ParseTreeContext context)

INTERNAL Check the left child node for an unqualified field access. The method delegates to the left most expression of multi-navigation path expression.

Overrides:

qualifyAttributeAccess in class Node

validate

public void validate(ParseTreeContext context)

INTERNAL Validate node and calculate its type. Check for enum literals.

Overrides:

validate in class LogicalOperatorNode

generateExpression

public Expression generateExpression(GenerationContext context)

INTERNAL Return a TopLink expression by getting the required variables using the left and right nodes "emp.address.city" = builder.get("address").get("city")

Overrides:

generateExpression in class Node

isDotNode

public boolean isDotNode()

INTERNAL Yes, this is a dot node

Overrides:

isDotNode in class Node

endsWithDirectToField

public boolean endsWithDirectToField(GenerationContext context)

INTERNAL (): Answer true if the SELECTed node has a left and right, and the right represents a direct-to-field mapping.

getTypeOfDirectToField

public Class getTypeOfDirectToField(GenerationContext context)

INTERNAL Returns the attribute type if the right represents a direct-to-field mapping.

getTypeForMapKey

public Object getTypeForMapKey(ParseTreeContext context)

endsWithCollectionField

public boolean endsWithCollectionField(GenerationContext context)

INTERNAL (): Answer true if the node has a left and right, and the right represents a collection mapping.

resolveAttribute

public String resolveAttribute()

INTERNAL Answer the name of the attribute which is represented by the receiver's right node.

Overrides:

resolveAttribute in class Node

resolveMapping

public DatabaseMapping resolveMapping(GenerationContext context)

INTERNAL Answer the mapping resulting from traversing the receiver's nodes

Overrides:

resolveMapping in class Node

resolveClass

public Class resolveClass(GenerationContext context)

resolveClass: Answer the class which results from traversing the mappings for the receiver's nodes

Overrides:

resolveClass in class Node

getAsString

public String getAsString()

INTERNAL Get the string representation of this node.

Overrides:

getAsString in class Node

getLeftMostNode

public Node getLeftMostNode()

INTERNAL Return the left most node of a dot expr, so return 'a' for 'a.b.c'.

getRightMostNode

public Node getRightMostNode()

INTERNAL Return the right most node of a dot expr, so return 'c' for 'a.b.c'.

isAliasableNode

public boolean isAliasableNode()

Overrides:

isAliasableNode in class Node