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

Class VariableNode

java.lang.Object
org.eclipse.persistence.internal.jpa.parsing.Node
org.eclipse.persistence.internal.jpa.parsing.VariableNode
All Implemented Interfaces:
AliasableNode
public class VariableNode extends Node implements AliasableNode
INTERNAL

Purpose: The node that represents typed variables, local variables, remote variables and TYPE constants.

Since:
TopLink 4.0

  • Constructor Details

    • VariableNode

      public VariableNode()
      VariableNode constructor comment.

    • VariableNode

      public VariableNode(String newVariableName)

  • Method Details

    • getVariableName

      public String getVariableName()

    • setVariableName

      public void setVariableName(String newVariableName)

    • getCanonicalVariableName

      public String getCanonicalVariableName()

    • isVariableNode

      public boolean isVariableNode()
      INTERNAL Is this node a VariableNode
      Overrides:
      isVariableNode in class Node

    • applyToQuery

      public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext generationContext)
      INTERNAL Apply this node to the passed query
      Overrides:
      applyToQuery in class Node

    • qualifyAttributeAccess

      public Node qualifyAttributeAccess(ParseTreeContext context)
      INTERNAL This node represent an unqualified field access in the case the method is called and the variableName is not defined as identification variable. The method returns a DotNode representing a qualified field access with the base variable as left child node. The right child node is an AttributeNode using the variableName as field name.
      Overrides:
      qualifyAttributeAccess in class Node

    • validate

      public void validate(ParseTreeContext context)
      INTERNAL Validate node and calculate its type.
      Overrides:
      validate in class Node

    • generateBaseBuilderExpression

      public Expression generateBaseBuilderExpression(GenerationContext context)

    • generateExpression

      public Expression generateExpression(GenerationContext generationContext)
      Description copied from class: Node
      INTERNAL Generate an expression for the node. Each subclass will generate a different expression and thus will need to override this method
      Overrides:
      generateExpression in class Node

    • generateExpressionForAlias

      public Expression generateExpressionForAlias(GenerationContext context)

    • getNodeForAlias

      public Node getNodeForAlias(GenerationContext context)

    • isAlias

      public boolean isAlias(GenerationContext context)
      isAlias: Answer true if this variable represents an alias in the FROM clause. i.e. "FROM Employee emp" declares "emp" as an alias

    • isAlias

      public boolean isAlias(ParseTreeContext context)

    • resolveClass

      public Class<?> resolveClass(GenerationContext generationContext)
      resolveClass: Answer the class which corresponds to my variableName. This is the class for an alias, where the variableName is registered to an alias.
      Overrides:
      resolveClass in class Node

    • toString

      public String toString(int indent)
      Overrides:
      toString in class Node

    • getAsString

      public String getAsString()
      INTERNAL Get the string representation of this node.
      Overrides:
      getAsString in class Node

    • getTypeForMapKey

      public Object getTypeForMapKey(ParseTreeContext context)

    • isAliasableNode

      public boolean isAliasableNode()
      Overrides:
      isAliasableNode in class Node