org.eclipse.persistence.internal.jpa.parsing.MinNode Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.jpa.parsing;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.queries.ObjectLevelReadQuery;
import org.eclipse.persistence.queries.ReportQuery;
/**
* INTERNAL
* Purpose: Model a MIN
*
Responsibilities:
* - Apply itself to a query correctly
*
*/
public class MinNode extends AggregateNode {
/**
* INTERNAL
* Apply this node to the passed query
*/
@Override
public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) {
if (theQuery.isReportQuery()) {
ReportQuery reportQuery = (ReportQuery)theQuery;
reportQuery.addAttribute(resolveAttribute(),
generateExpression(context));
}
}
/**
* INTERNAL
* Validate node and calculate its type.
*/
@Override
public void validate(ParseTreeContext context) {
if (left != null) {
left.validate(context);
setType(left.getType());
}
}
/**
* INTERNAL
*/
@Override
protected Expression addAggregateExression(Expression expr) {
return expr.minimum();
}
/**
* INTERNAL
* Get the string representation of this node.
*/
@Override
public String getAsString() {
return "MIN(" + left.getAsString() + ")";
}
}