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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.cayenne.ejbql.parser;
import org.apache.cayenne.ejbql.EJBQLExpressionVisitor;
/**
* @since 3.0
*/
public class EJBQLPositionalInputParameter extends SimpleNode {
public EJBQLPositionalInputParameter(int id) {
super(id);
}
@Override
protected boolean visitNode(EJBQLExpressionVisitor visitor) {
// this special handling caters for the fact that if a position parameter is used
// in an IN clause and it is the only parameter and it is a collection of objects
// then it should be bound as a number of objects rather than as that collection.
if(null!=parent && EJBQLIn.class.isAssignableFrom(parent.getClass())) {
EJBQLIn parentIn = (EJBQLIn) parent;
// the count here is two; 0 is the expression to the thing that should IN the
// list and 1... is the list itself.
if(2==parentIn.getChildrenCount() && this==parentIn.getChild(1)) {
return visitor.visitPositionalInputParameterForIn(this);
}
}
return visitor.visitPositionalInputParameter(this);
}
public int getPosition() {
return getText() != null ? Integer.parseInt(getText()) : -1;
}
}