/*
 * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.data.impl.schema;

import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;

/**
 * Client allocated result holder for {@link ImmutableNormalizedNodeStreamWriter} which produces instance
 * of NormalizedNode.
 *
 * <p>
 * Client may supply result holder to {@link ImmutableNormalizedNodeStreamWriter} which will be once updated when
 * the result is available.
 *
 * <p>
 * This is intended for using {@link ImmutableNormalizedNodeStreamWriter} without supplying builder, so instantiated
 * writer will select correct builder based on first event and sets resulting {@link NormalizedNode} when end event is
 * invoked for node.
 */
public class NormalizedNodeResult {
    private boolean finished = false;
    private NormalizedNode<?,?> result;

    public NormalizedNode<?, ?> getResult() {
        return result;
    }

    public boolean isFinished() {
        return finished;
    }

    void setResult(final NormalizedNode<?, ?> result) {
        if (finished) {
            throw new ResultAlreadySetException("Normalized Node result was already set.", this.result);
        }
        this.finished = true;
        this.result = result;
    }

    void reset() {
        result = null;
        finished = false;
    }
}