org.exolab.castor.jdo.oql
Class ParseTreeNode
java.lang.Objectorg.exolab.castor.jdo.oql.ParseTreeNode
- TokenTypes
public class ParseTreeNode
extends java.lang.Object
A Node in the Parse tree which is generated by the
Parser as the
tree representation of the OQL Query. Each node has a link back to the
parent node (null for the root node), and a vector of children. Each node
contains the
Token which represents that part of the tree.
$Revision: 1.1.1.1 $ $Date: 2003/03/03 07:08:24 $ARROW, BOOLEAN_LITERAL, CHAR_LITERAL, COLON, COMMA, CONCAT, DATE_LITERAL, DIVIDE, DOLLAR, DOT, DOUBLE_LITERAL, END_OF_QUERY, EQUAL, GT, GTE, IDENTIFIER, KEYWORD_ABS, KEYWORD_AND, KEYWORD_AS, KEYWORD_ASC, KEYWORD_AVG, KEYWORD_BETWEEN, KEYWORD_BY, KEYWORD_COUNT, KEYWORD_DESC, KEYWORD_DISTINCT, KEYWORD_FROM, KEYWORD_IN, KEYWORD_IS_DEFINED, KEYWORD_IS_UNDEFINED, KEYWORD_LIKE, KEYWORD_LIMIT, KEYWORD_LIST, KEYWORD_MAX, KEYWORD_MIN, KEYWORD_MOD, KEYWORD_NIL, KEYWORD_NOT, KEYWORD_OR, KEYWORD_ORDER, KEYWORD_SELECT, KEYWORD_SUM, KEYWORD_UNDEFINED, KEYWORD_WHERE, LONG_LITERAL, LPAREN, LT, LTE, MINUS, NOT_EQUAL, PLUS, RPAREN, STRING_LITERAL, TIMES, TIMESTAMP_LITERAL, TIME_LITERAL |
ParseTreeNode
public ParseTreeNode(ParseTreeNode parent,
Token token) Creates a new Node with supplied parent and token.
parent - The parent of this node (null for root)token - The token data in this node
ParseTreeNode
public ParseTreeNode(Token token)
Creates a new root Node with supplied token.
token - The token data in this node
addChild
public void addChild(ParseTreeNode child)
Adds a new node as a child of this node. Changes the nodes parent to
this.
children
public Enumeration children()
Accessor method for an enumeration of this nodes children.
- An Enumeration of children.
getChild
public ParseTreeNode getChild(int index)
Accessor method for individual children of this node.
index - the index of the child to retrieve.
- the index child of this node.
getChildCount
public int getChildCount()
Accessor method for the number of children of this node.
- the number of children of this node.
getParent
public ParseTreeNode getParent()
Accessor method for the parent of this node.
getToken
public Token getToken()
Accessor method for the token.
- The token which is the datum of this node.
isLeaf
public boolean isLeaf()
Specifies whether this node is a leaf.
- True if the node does not have any children, otherwise false.
isRoot
public boolean isRoot()
Specifies whether this node is the root of a tree.
- True if the node does not have a parent, otherwise false.
setParent
public void setParent(ParseTreeNode parent)
Changes the parent of this node.
toString
public String toString()
toStringEx
public String toStringEx()
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