/**************************************************************************************
 * 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.view.window;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.collection.OneEventCollection;
import com.espertech.esper.collection.ViewUpdatedCollection;
import com.espertech.esper.core.context.util.AgentInstanceViewFactoryChainContext;
import com.espertech.esper.core.service.EPStatementHandleCallback;
import com.espertech.esper.core.service.ExtensionServicesContext;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.variable.VariableChangeCallback;
import com.espertech.esper.epl.variable.VariableReader;
import com.espertech.esper.epl.variable.VariableService;
import com.espertech.esper.event.map.MapEventBean;
import com.espertech.esper.schedule.ScheduleHandleCallback;
import com.espertech.esper.schedule.ScheduleSlot;
import com.espertech.esper.util.StopCallback;
import com.espertech.esper.view.*;

import java.util.ArrayDeque;
import java.util.Iterator;
import java.util.Set;

/**
 * This view is a moving window extending the into the past until the expression passed to it returns false.
 */
public final class ExpressionViewUtil {
    public final static String CURRENT_COUNT = "current_count";
    public final static String OLDEST_TIMESTAMP = "oldest_timestamp";
    public final static String NEWEST_TIMESTAMP = "newest_timestamp";
    public final static String EXPIRED_COUNT = "expired_count";
    public final static String VIEW_REFERENCE = "view_reference";
}