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/**
* INTERNAL
* <p><b>Purpose</b>: This node represents a HAVING
* <p><b>Responsibilities</b>:<ul>
* <li> Generate the correct expression for HAVING
* </ul>
*/
package oracle.toplink.essentials.internal.parsing;
// TopLink Imports
import oracle.toplink.essentials.queryframework.ReportQuery;
import oracle.toplink.essentials.queryframework.ObjectLevelReadQuery;
import oracle.toplink.essentials.exceptions.EJBQLException;
import oracle.toplink.essentials.expressions.Expression;
public class HavingNode extends MajorNode {
private Node having = null;
/**
* INTERNAL
* Validate the current node.
*/
public void validate(ParseTreeContext context, GroupByNode groupbyNode) {
if (having != null) {
having.validate(context);
if ((groupbyNode != null) && !groupbyNode.isValidHavingExpr(having)) {
throw EJBQLException.invalidHavingExpression(
context.getQueryInfo(), having.getLine(), having.getColumn(),
having.getAsString(), groupbyNode.getAsString());
}
}
}
/**
* INTERNAL
* Add the having expression to the passed query
*/
public void addHavingToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) {
if (theQuery.isReportQuery()) {
Expression havingExpression = getHaving().generateExpression(context);
((ReportQuery)theQuery).setHavingExpression(havingExpression);
}
}
/**
* INTERNAL
* Return the HAVING expression
*/
public Node getHaving() {
return having;
}
/**
* INTERNAL
* Set the HAVING expression
*/
public void setHaving(Node having) {
this.having = having;
}
}