org.apache.jdo.impl.jdoql.tree

Class StaticFieldAccessExpr

java.lang.Object

antlr.BaseAST

antlr.CommonAST

org.apache.jdo.impl.jdoql.jdoqlc.JDOQLAST

org.apache.jdo.impl.jdoql.tree.NodeImpl

org.apache.jdo.impl.jdoql.tree.Expr

org.apache.jdo.impl.jdoql.tree.IdentifierExpr

org.apache.jdo.impl.jdoql.tree.StaticFieldAccessExpr

All Implemented Interfaces:

antlr.collections.AST, java.io.Serializable, java.lang.Cloneable, Expression, IdentifierExpression, Node, StaticFieldAccessExpression

public final class StaticFieldAccessExpr
extends IdentifierExpr
implements StaticFieldAccessExpression

This node represents a static field access expression. It inherits from FieldAccessExpr. Static Field access expressions have exactly one child, the target expression. That target expression is an identifier expression.

Author:

Michael Watzek

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.jdo.impl.jdoql.jdoqlc.JDOQLAST

column, line, typeInfo

Fields inherited from class antlr.BaseAST

down, right

Constructor Summary

Constructors

Constructor and Description
StaticFieldAccessExpr() The noarg constructor is needed for ANTLR support and deserialization.
StaticFieldAccessExpr(antlr.Token token) The noarg constructor is needed for ANTLR support.

Method Summary

Methods

Modifier and Type	Method and Description
void	arrive(NodeVisitor visitor) Delegates to the argument visitor.
java.lang.Object	getFieldValue(javax.jdo.PersistenceManager pm) Returns the value of the field corresponding with this static field access expression.
java.lang.String	getName() Returns the name of the accessed field.
java.lang.Object	leave(NodeVisitor visitor, java.lang.Object[] results) Delegates to the argument visitor.
void	setName(java.lang.String fieldName) Sets the name of the accessed field.

Methods inherited from class org.apache.jdo.impl.jdoql.tree.IdentifierExpr

getTypeName

Methods inherited from class org.apache.jdo.impl.jdoql.tree.NodeImpl

clone, getChildren, getJavaClass, getObject, getParent, getTokenType, setObject, setParent, toString, walkNextChild

Methods inherited from class org.apache.jdo.impl.jdoql.jdoqlc.JDOQLAST

getColumn, getLine, getTypeInfo, initialize, initialize, initialize, setColumn, setLine, setTypeInfo, treeToString

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

Methods inherited from interface org.apache.jdo.jdoql.tree.IdentifierExpression

getTypeName

Methods inherited from interface org.apache.jdo.jdoql.tree.Node

getChildren, getJavaClass, getObject, getParent, getTokenType, setObject, setParent, walkNextChild

Constructor Detail

StaticFieldAccessExpr

public StaticFieldAccessExpr()

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.

StaticFieldAccessExpr

public StaticFieldAccessExpr(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.

Method Detail

getName

public java.lang.String getName()

Returns the name of the accessed field. Please note, that this name does not contain any information about the target object of this field access.

Specified by:

getName in interface IdentifierExpression

Overrides:

getName in class IdentifierExpr

Returns:

the field name

setName

public void setName(java.lang.String fieldName)

Sets the name of the accessed field. Please note, that this name must not contain any information about the target object of this field access. This method is used by semantic analysis only.

Parameters:

fieldName - the field name

getFieldValue

public java.lang.Object getFieldValue(javax.jdo.PersistenceManager pm)

Returns the value of the field corresponding with this static field access expression.

Specified by:

getFieldValue in interface StaticFieldAccessExpression

Parameters:

pm - the persistence manager of the query

Returns:

the field value

Throws:

JDOQueryException - if access to the corresponding field of this expression is denied

arrive

public void arrive(NodeVisitor visitor)

Delegates to the argument visitor.

Specified by:

arrive in interface Node

Overrides:

arrive in class IdentifierExpr

Parameters:

visitor - the node visitor

leave

public java.lang.Object leave(NodeVisitor visitor,
                     java.lang.Object[] results)

Delegates to the argument visitor.

Specified by:

leave in interface Node

Overrides:

leave in class IdentifierExpr

Parameters:

visitor - the node visitor

results - the result array

Returns:

the object returned by the visitor instance