org.apache.cayenne.ejbql.parser
Class SimpleNode

java.lang.Object
  extended by org.apache.cayenne.ejbql.parser.SimpleNode
All Implemented Interfaces:
Serializable, EJBQLExpression, Node
Direct Known Subclasses:
AggregateConditionNode, EJBQLAbs, EJBQLAbstractSchemaName, EJBQLAdd, EJBQLAggregate, EJBQLAggregateColumn, EJBQLAll, EJBQLAny, EJBQLAscending, EJBQLBetween, EJBQLBooleanLiteral, EJBQLClassName, EJBQLConcat, EJBQLConstructor, EJBQLConstructorParameter, EJBQLConstructorParameters, EJBQLCurrentDate, EJBQLCurrentTime, EJBQLCurrentTimestamp, EJBQLDecimalLiteral, EJBQLDelete, EJBQLDescending, EJBQLDistinct, EJBQLDivide, EJBQLEquals, EJBQLEscapeCharacter, EJBQLExists, EJBQLFrom, EJBQLFromItem, EJBQLGreaterOrEqual, EJBQLGreaterThan, EJBQLGroupBy, EJBQLHaving, EJBQLIdentificationVariable, EJBQLIdentifier, EJBQLIn, EJBQLIntegerLiteral, EJBQLIsEmpty, EJBQLIsNull, EJBQLJoin, EJBQLLength, EJBQLLessOrEqual, EJBQLLessThan, EJBQLLike, EJBQLLocate, EJBQLLower, EJBQLMemberOf, EJBQLMod, EJBQLMultiply, EJBQLNamedInputParameter, EJBQLNegative, EJBQLNotEquals, EJBQLOrderBy, EJBQLOrderByItem, EJBQLPath, EJBQLPatternValue, EJBQLPositionalInputParameter, EJBQLSelect, EJBQLSelectClause, EJBQLSelectExpression, EJBQLSelectExpressions, EJBQLSize, EJBQLSqrt, EJBQLStringLiteral, EJBQLSubselect, EJBQLSubstring, EJBQLSubtract, EJBQLTok, EJBQLTrim, EJBQLTrimCharacter, EJBQLTrimSpecification, EJBQLUpdate, EJBQLUpdateField, EJBQLUpdateItem, EJBQLUpdateValue, EJBQLUpper, EJBQLWhere

public abstract class SimpleNode
extends Object
implements Node, Serializable, EJBQLExpression

A base node for the EJBQL concrete nodes that satisfies JJTree requirements.

Since:
3.0
See Also:
Serialized Form

Constructor Summary
SimpleNode(int id)
           
 
Method Summary
 EJBQLExpression getChild(int index)
          Returns a child expression node at the specified index.
 int getChildrenCount()
          Returns a number of child operands of this expression node.
 String getName()
           
 String getText()
          Returns a text property of the node.
 boolean isNegated()
          Returns an optional boolean flag that negates the value of the expression.
 void jjtAddChild(Node n, int i)
          This method tells the node to add its argument to the node's list of children.
 void jjtClose()
          This method is called after all the child nodes have been added.
 Node jjtGetChild(int i)
          This method returns a child node.
 int jjtGetNumChildren()
          Return the number of children the node has.
 Node jjtGetParent()
           
 void jjtOpen()
          This method is called after the node has been made the current node.
 void jjtSetParent(Node parent)
          This pair of methods are used to inform the node of its parent.
 void setText(String text)
           
 String toString()
           
 void visit(EJBQLExpressionVisitor visitor)
          A recursive visit method that passes a visitor to this node and all its children, depth first.
protected  boolean visitChild(EJBQLExpressionVisitor visitor, int childIndex)
          Recursively visits a child at the specified index.
protected  boolean visitNode(EJBQLExpressionVisitor visitor)
          Visits this node without recursion.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SimpleNode

public SimpleNode(int id)
Method Detail

getText

public String getText()
Description copied from interface: EJBQLExpression
Returns a text property of the node.

Specified by:
getText in interface EJBQLExpression

isNegated

public boolean isNegated()
Description copied from interface: EJBQLExpression
Returns an optional boolean flag that negates the value of the expression.

Specified by:
isNegated in interface EJBQLExpression

visit

public void visit(EJBQLExpressionVisitor visitor)
A recursive visit method that passes a visitor to this node and all its children, depth first.

Specified by:
visit in interface EJBQLExpression

visitNode

protected boolean visitNode(EJBQLExpressionVisitor visitor)
Visits this node without recursion. Default implementation simply returns true. Subclasses override this method to call an appropriate visitor method.


visitChild

protected boolean visitChild(EJBQLExpressionVisitor visitor,
                             int childIndex)
Recursively visits a child at the specified index. Subclasses override this method if they desire to implement callbacks after visiting each child.


getChild

public EJBQLExpression getChild(int index)
Description copied from interface: EJBQLExpression
Returns a child expression node at the specified index.

Specified by:
getChild in interface EJBQLExpression

getChildrenCount

public int getChildrenCount()
Description copied from interface: EJBQLExpression
Returns a number of child operands of this expression node.

Specified by:
getChildrenCount in interface EJBQLExpression

getName

public String getName()

jjtOpen

public void jjtOpen()
Description copied from interface: Node
This method is called after the node has been made the current node. It indicates that child nodes can now be added to it.

Specified by:
jjtOpen in interface Node

jjtClose

public void jjtClose()
Description copied from interface: Node
This method is called after all the child nodes have been added.

Specified by:
jjtClose in interface Node

jjtSetParent

public void jjtSetParent(Node parent)
Description copied from interface: Node
This pair of methods are used to inform the node of its parent.

Specified by:
jjtSetParent in interface Node

jjtGetParent

public Node jjtGetParent()
Specified by:
jjtGetParent in interface Node

jjtAddChild

public void jjtAddChild(Node n,
                        int i)
Description copied from interface: Node
This method tells the node to add its argument to the node's list of children.

Specified by:
jjtAddChild in interface Node

jjtGetChild

public Node jjtGetChild(int i)
Description copied from interface: Node
This method returns a child node. The children are numbered from zero, left to right.

Specified by:
jjtGetChild in interface Node

jjtGetNumChildren

public int jjtGetNumChildren()
Description copied from interface: Node
Return the number of children the node has.

Specified by:
jjtGetNumChildren in interface Node

setText

public void setText(String text)

toString

public String toString()
Overrides:
toString in class Object


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