Package org.apache.cayenne.ejbql.parser

Class SimpleNode

java.lang.Object

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

Constructors

Constructor	Description
SimpleNode(int id)

Method Summary

Modifier and Type	Method	Description
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