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

Class Node

java.lang.Object
org.eclipse.persistence.internal.jpa.parsing.Node
Direct Known Subclasses:
AggregateNode, AllNode, AnyNode, AttributeNode, BinaryOperatorNode, CaseNode, ClassForInheritanceNode, CoalesceNode, ConstructorNode, ExistsNode, FetchJoinNode, FunctionalExpressionNode, IdentificationVariableDeclNode, IndexNode, LiteralNode, LogicalOperatorNode, MajorNode, MapEntryNode, MapKeyNode, NullIfNode, OrderByItemNode, ParameterNode, SimpleConditionalExpressionNode, SomeNode, SortDirectionNode, SubqueryNode, UnaryMinus, VariableNode, WhenThenNode
public class Node extends Object
INTERNAL

Purpose: This is the superclass for all Nodes.

Responsibilities:

  • Answer default answers for all method calls
  • Delegate most responsibilities to the sub-classes
Since:
TopLink 4.0

  • Field Details

    • left

      protected Node left

    • shouldGenerateExpression

      public boolean shouldGenerateExpression

    • alias

      protected String alias

  • Constructor Details

    • Node

      public Node()
      Return a new Node.

  • Method Details

    • applyToQuery

      public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context)
      INTERNAL Apply this node to the passed query

    • addToExpression

      public Expression addToExpression(Expression parentExpression, GenerationContext context)
      INTERNAL Add my expression semantics to the parentExpression. Each subclass will add a different expression and thus will need to override this method

    • getAsString

      public String getAsString()
      INTERNAL Get the string representation of this node. By default return toString()

    • qualifyAttributeAccess

      public Node qualifyAttributeAccess(ParseTreeContext context)
      INTERNAL Check the child node for an unqualified field access and if so, replace it by a qualified field access.

    • validate

      public void validate(ParseTreeContext context)
      INTERNAL Validate node and calculate its type.

    • validateParameter

      public void validateParameter(ParseTreeContext context, Object contextType)
      INTERNAL

    • generateExpression

      public Expression generateExpression(GenerationContext context)
      INTERNAL Generate an expression for the node. Each subclass will generate a different expression and thus will need to override this method

    • getLeft

      public Node getLeft()
      INTERNAL Return the left node

    • getRight

      public Node getRight()
      INTERNAL Return the right node

    • hasLeft

      public boolean hasLeft()
      INTERNAL Does this node have a left

    • hasRight

      public boolean hasRight()
      INTERNAL Does this node have a right

    • isAggregateNode

      public boolean isAggregateNode()
      INTERNAL Is this node an Aggregate node

    • isDotNode

      public boolean isDotNode()
      INTERNAL Is this node a Dot node

    • isLiteralNode

      public boolean isLiteralNode()
      INTERNAL Is this a literal node

    • isMultiplyNode

      public boolean isMultiplyNode()
      INTERNAL Is this node a Multiply node

    • isNotNode

      public boolean isNotNode()
      INTERNAL Is this node a Not node

    • isParameterNode

      public boolean isParameterNode()
      INTERNAL Is this a Parameter node

    • isDivideNode

      public boolean isDivideNode()
      INTERNAL Is this node a Divide node

    • isPlusNode

      public boolean isPlusNode()
      INTERNAL Is this node a Plus node

    • isMapKeyNode

      public boolean isMapKeyNode()
      INTERNAL Is this node a MapKey node

    • isMinusNode

      public boolean isMinusNode()
      INTERNAL Is this node a Minus node

    • isVariableNode

      public boolean isVariableNode()
      INTERNAL Is this node a VariableNode

    • isAttributeNode

      public boolean isAttributeNode()
      INTERNAL Is this node an AttributeNode

    • isCountNode

      public boolean isCountNode()
      INTERNAL Is this node a CountNode

    • isConstructorNode

      public boolean isConstructorNode()
      INTERNAL Is this node a ConstructorNode

    • isSubqueryNode

      public boolean isSubqueryNode()
      INTERNAL Is this node a SubqueryNode

    • isEscape

      public boolean isEscape()
      INTERNAL Is this an escape node

    • resolveAttribute

      public String resolveAttribute()
      resolveAttribute(): Answer the name of the attribute which is represented by the receiver. Subclasses should override this.

    • resolveClass

      public Class<?> resolveClass(GenerationContext context)
      resolveClass: Answer the class associated with the content of this node. Default is to return null. Subclasses should override this.

    • resolveClass

      public Class<?> resolveClass(GenerationContext context, Class<?> ownerClass)
      resolveClass: Answer the class associated with the content of this node. Default is to return null. Subclasses should override this.

    • resolveMapping

      public DatabaseMapping resolveMapping(GenerationContext context)
      resolveMapping: Answer the mapping associated with the contained nodes. Subclasses should override this.

    • resolveMapping

      public DatabaseMapping resolveMapping(GenerationContext context, Class<?> ownerClass)
      resolveMapping: Answer the mapping associated with the contained nodes. Use the provided class as the context. Subclasses should override this.

    • setLeft

      public void setLeft(Node newLeft)
      INTERNAL Set the left node to the passed value

    • setRight

      public void setRight(Node newRight)
      INTERNAL Set the right for this node

    • getLine

      public int getLine()

    • setLine

      public void setLine(int line)

    • getColumn

      public int getColumn()

    • setColumn

      public void setColumn(int column)

    • getType

      public Object getType()
      INTERNAL Return the type of this node.

    • setType

      public void setType(Object type)
      INTERNAL Set this node's type.

    • appendExpression

      public Expression appendExpression(Expression left, Expression right)
      INTERNAL Returns left.and(right) if both are defined.

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • toString

      public String toString(int indent)

    • toStringDisplayName

      public String toStringDisplayName()

    • toStringIndent

      public void toStringIndent(int indent, StringBuilder buffer)

    • getAlias

      public String getAlias()

    • setAlias

      public void setAlias(String alias)

    • isAliasableNode

      public boolean isAliasableNode()