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Complex event processing and event series analysis component

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/**************************************************************************************
 * Copyright (C) 2008 EsperTech, Inc. All rights reserved.                            *
 * http://esper.codehaus.org                                                          *
 * http://www.espertech.com                                                           *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the GPL license       *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package com.espertech.esper.pattern;

import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;

/**
 * This class represents an 'or' operator in the evaluation tree representing any event expressions.
 */
public class EvalOrNode extends EvalNodeBase
{
    private static final long serialVersionUID = -7512529701280258859L;

    private transient PatternContext context;

    protected EvalOrNode() {
    }

    public EvalStateNode newState(Evaluator parentNode,
                                        MatchedEventMap beginState,
                                        PatternContext context, EvalStateNodeNumber stateNodeId)
    {
        if (this.context == null) {
            this.context = context;
        }
        return new EvalOrStateNode(parentNode, this, beginState);
    }

    public PatternContext getContext() {
        return context;
    }

    public final String toString()
    {
        return ("EvalOrNode children=" + this.getChildNodes().size());
    }

    private static final Log log = LogFactory.getLog(EvalOrNode.class);
}