org.apache.jdo.impl.jdoql.tree
Class NodeImpl
java.lang.Object
antlr.BaseAST
antlr.CommonAST
org.apache.jdo.impl.jdoql.jdoqlc.JDOQLAST
org.apache.jdo.impl.jdoql.tree.NodeImpl
- All Implemented Interfaces:
- antlr.collections.AST, java.lang.Cloneable, Node, java.io.Serializable
- Direct Known Subclasses:
- CandidateClassImpl, Decl, Expr, OrderingExpr, Tree, TypeImpl
- public class NodeImpl
- extends JDOQLAST
- implements Node
This is the base class of all nodes. Examples of nodes are
, Declaration
, Expression
and OrderingExpression. This class is not defined
abstract
to allow the syntactical analysis to
construct general nodes, which are replaced by the semantic analysis
with their specialized counterparts.
- Author:
- Michael Watzek
- See Also:
- Serialized Form
Fields inherited from class antlr.BaseAST |
down, right |
Constructor Summary |
NodeImpl()
The noarg constructor is needed for ANTLR support and deserialization. |
NodeImpl(antlr.Token token)
The noarg constructor is needed for ANTLR support. |
Method Summary |
void |
arrive(NodeVisitor visitor)
Implements a noop as a default implementation. |
protected java.lang.Object |
clone()
Creates and returns a copy of this object nullifying fields
parent , children and clazz . |
Node[] |
getChildren()
Returns this node's children. |
java.lang.Class |
getJavaClass()
Returns the Java type of this node. |
java.lang.Object |
getObject()
Returns the user object. |
Node |
getParent()
Returns this node's parent node. |
int |
getTokenType()
Returns the token type of this node. |
java.lang.Object |
leave(NodeVisitor visitor,
java.lang.Object[] results)
Returns null as a default implementation. |
void |
setObject(java.lang.Object object)
Sets the user object. |
void |
setParent(Node parent)
Sets the parent of this node. |
java.lang.String |
toString()
Returns a string representation of this JDOQLAST. |
boolean |
walkNextChild(NodeVisitor visitor,
java.lang.Object resultOfPreviousChild,
int indexOfNextChild)
Returns true as a default implementation. |
Methods inherited from class antlr.CommonAST |
getText, getType, initialize, setText, setType |
Methods inherited from class antlr.BaseAST |
addChild, decode, encode, equals, equalsList, equalsListPartial, equalsTree, equalsTreePartial, findAll, findAllPartial, getFirstChild, getNextSibling, getNumberOfChildren, getTokenNames, removeChildren, setFirstChild, setNextSibling, setVerboseStringConversion, toStringList, toStringTree, xmlSerialize, xmlSerializeNode, xmlSerializeRootClose, xmlSerializeRootOpen |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
NodeImpl
public NodeImpl()
- The noarg constructor is needed for ANTLR support and deserialization.
The caller must make sure to set the ANTLR tree structure himself
or, call
setChildren
optionally.
NodeImpl
public NodeImpl(antlr.Token token)
- The noarg constructor is needed for ANTLR support.
The caller must make sure to set the ANTLR tree structure himself
or, call
setChildren
optionally.
clone
protected java.lang.Object clone()
throws java.lang.CloneNotSupportedException
- Creates and returns a copy of this object nullifying fields
parent
, children
and clazz
.
- Overrides:
clone
in class JDOQLAST
- Returns:
- the copy
- Throws:
java.lang.CloneNotSupportedException
- thrown by super.clone()
toString
public java.lang.String toString()
- Description copied from class:
JDOQLAST
- Returns a string representation of this JDOQLAST.
- Specified by:
toString
in interface antlr.collections.AST
- Overrides:
toString
in class JDOQLAST
- Returns:
- a string representation of the object.
getJavaClass
public java.lang.Class getJavaClass()
- Returns the Java type of this node.
- Specified by:
getJavaClass
in interface Node
- Returns:
- the Java type
getTokenType
public int getTokenType()
- Returns the token type of this node.
- Specified by:
getTokenType
in interface Node
- Returns:
- the token type
getObject
public java.lang.Object getObject()
- Returns the user object.
- Specified by:
getObject
in interface Node
- Returns:
- the ouser object
setObject
public void setObject(java.lang.Object object)
- Sets the user object.
- Specified by:
setObject
in interface Node
- Parameters:
object
- the user object
getParent
public Node getParent()
- Returns this node's parent node.
- Specified by:
getParent
in interface Node
- Returns:
- the parent node
setParent
public void setParent(Node parent)
- Sets the parent of this node.
- Specified by:
setParent
in interface Node
- Parameters:
parent
- the parent node
getChildren
public Node[] getChildren()
- Returns this node's children.
Ensures that this node's children corresponds with the underlying
ANTLR tree structure.
- Specified by:
getChildren
in interface Node
- Returns:
- the children
arrive
public void arrive(NodeVisitor visitor)
- Implements a noop as a default implementation.
- Specified by:
arrive
in interface Node
- Parameters:
visitor
- the node visitor
leave
public java.lang.Object leave(NodeVisitor visitor,
java.lang.Object[] results)
- Returns
null
as a default implementation.
- Specified by:
leave
in interface Node
- Parameters:
visitor
- the node visitorresults
- the result array containing result instances of
this node's children
- Returns:
- the result instance of the delegation call
of the argument
visitor
walkNextChild
public boolean walkNextChild(NodeVisitor visitor,
java.lang.Object resultOfPreviousChild,
int indexOfNextChild)
- Returns
true
as a default implementation.
- Specified by:
walkNextChild
in interface Node
- Parameters:
visitor
- the node visitorresultOfPreviousChild
- the result computed by leaving the
previous child nodeindexOfNextChild
- the index in the children array of the
next child to walk
- Returns:
true
Copyright © 2005-2007 Apache Software Foundation. All Rights Reserved.