Package org.eclipse.persistence.jpa.jpql.parser

Class QueryPosition

java.lang.Object

org.eclipse.persistence.jpa.jpql.parser.QueryPosition

public final class QueryPosition
extends java.lang.Object

This object contains the cursor position within the parsed tree and within each of the Expression from the root to the deepest leaf.

Version:

2.5

Author:

Pascal Filion

Since:

2.3

Constructor Summary

Constructors

Constructor	Description
QueryPosition(int position)	Creates a new QueryPosition.

Method Summary

Modifier and Type	Method	Description
void	addPosition(Expression expression, int position)	Adds the position of the cursor within the given Expression
Expression	getExpression()	Returns the child Expression where the position of the cursor is.
int	getPosition()	Returns the position of the cursor in the query.
int	getPosition(Expression expression)	Returns the position of the cursor within the given Expression
void	setExpression(Expression expression)	Sets the deepest leaf where the cursor is located.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryPosition

public QueryPosition(int position)

Creates a new QueryPosition.

Parameters:

position - The position of the cursor in the query

Method Detail

addPosition

public void addPosition(Expression expression,
                        int position)

Adds the position of the cursor within the given Expression

Parameters:

expression - An Expression in which the cursor is located

position - The position of the cursor within the given Expression

getExpression

public Expression getExpression()

Returns the child Expression where the position of the cursor is.

Returns:

The deepest Expression child that was retrieving by traversing the parsed tree up to the position of the cursor.

getPosition

public int getPosition()

Returns the position of the cursor in the query.

Returns:

The position of the cursor in the query

getPosition

public int getPosition(Expression expression)

Returns the position of the cursor within the given Expression

Parameters:

expression - The Expression for which the position of the cursor is requested

Returns:

Either the position of the cursor within the given Expression or -1 if the cursor is not within it

setExpression

public void setExpression(Expression expression)

Sets the deepest leaf where the cursor is located.

Parameters:

expression - The Expression that is the deepest leaf within the parsed tree

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object