Package org.datanucleus.store.query.compiler

Class AbstractParser

java.lang.Object

org.datanucleus.store.query.compiler.AbstractParser

All Implemented Interfaces:

Parser

Direct Known Subclasses:

JDOQLParser, JPQLParser

public abstract class AbstractParser
extends Object
implements Parser

Abstract query parser. To be extended for the particular query language.

Field Summary

Fields

Modifier and Type	Field	Description
protected Lexer	lexer
protected Deque<Node>	stack
protected boolean	strict	Whether to impose strict syntax for the query language.

Constructor Summary

Constructors

Constructor	Description
AbstractParser()

Method Summary

Modifier and Type	Method	Description
protected static Node	getLastDescendantNodeForNode(Node node)	Convenience method to navigate down through descendants to find the last one.
void	setExplicitParameters(boolean flag)
void	setStrict(boolean flag)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.datanucleus.store.query.compiler.Parser

parse, parseFrom, parseOrder, parseParameters, parseResult, parseTuple, parseUpdate, parseVariable, parseVariables

Field Details

strict

protected boolean strict

Whether to impose strict syntax for the query language.

lexer

protected Lexer lexer

stack

protected Deque<Node> stack

Constructor Details

AbstractParser

public AbstractParser()

Method Details

setStrict

public void setStrict(boolean flag)

Specified by:

setStrict in interface Parser

setExplicitParameters

public void setExplicitParameters(boolean flag)

Specified by:

setExplicitParameters in interface Parser

getLastDescendantNodeForNode

protected static Node getLastDescendantNodeForNode(Node node)

Convenience method to navigate down through descendants to find the last one. Uses the first child node each time, so doesn't cope if there are multiple.

Parameters:

node - The node

Returns:

The last descendant