AncestorQuery.java

/**
 * Copyright (c) 2004-2025 Carnegie Mellon University and others. (see Contributors file).
 * All Rights Reserved.
 *
 * NO WARRANTY. ALL MATERIAL IS FURNISHED ON AN "AS-IS" BASIS. CARNEGIE MELLON UNIVERSITY MAKES NO WARRANTIES OF ANY
 * KIND, EITHER EXPRESSED OR IMPLIED, AS TO ANY MATTER INCLUDING, BUT NOT LIMITED TO, WARRANTY OF FITNESS FOR PURPOSE
 * OR MERCHANTABILITY, EXCLUSIVITY, OR RESULTS OBTAINED FROM USE OF THE MATERIAL. CARNEGIE MELLON UNIVERSITY DOES NOT
 * MAKE ANY WARRANTY OF ANY KIND WITH RESPECT TO FREEDOM FROM PATENT, TRADEMARK, OR COPYRIGHT INFRINGEMENT.
 *
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 * SPDX-License-Identifier: EPL-2.0
 *
 * Created, in part, with funding and support from the United States Government. (see Acknowledgments file).
 *
 * This program includes and/or can make use of certain third party source code, object code, documentation and other
 * files ("Third Party Software"). The Third Party Software that is used by this program is dependent upon your system
 * configuration. By using this program, You agree to comply with any and all relevant Third Party Software terms and
 * conditions contained in any such Third Party Software or separate license file distributed with such Third Party
 * Software. The parties who own the Third Party Software ("Third Party Licensors") are intended third party benefici-
 * aries to this license with respect to the terms applicable to their Third Party Software. Third Party Software li-
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 */
package org.osate.ge.internal.query;

import java.util.Deque;

import org.osate.ge.BusinessObjectContext;

class AncestorQuery<T> extends DefaultQuery<T> {
	private final int depth;

	public AncestorQuery(final DefaultQuery<T> prev, final int depth) {
		super(prev);
		this.depth = depth;

		if(depth <= 0) {
			throw new RuntimeException("Invalid depth: " + depth);
		}
	}

	@Override
	void run(final Deque<DefaultQuery<T>> remainingQueries, final BusinessObjectContext ctx,
			final QueryExecutionState<T> state, final QueryResults result) {
		final BusinessObjectContext e = ctx == null ? null : ctx.getAncestor(depth);

		// Process the value. If any
		if(e != null) {
			processResultValue(remainingQueries, e, state, result);
		}
	}
}