/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  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.epl.spec;

import com.espertech.esper.client.EPException;
import com.espertech.esper.epl.expression.core.ExprNode;
import com.espertech.esper.epl.property.PropertyEvaluator;

import java.util.List;

/**
 * Specification for use of an existing named window.
 */
public class NamedWindowConsumerStreamSpec extends StreamSpecBase implements StreamSpecCompiled {
    private static final long serialVersionUID = -8549850729310756432L;

    private String windowName;
    private List<ExprNode> filterExpressions;
    private transient PropertyEvaluator optPropertyEvaluator;

    /**
     * Ctor.
     *
     * @param windowName           - specifies the name of the named window
     * @param optionalAsName       - a name or null if none defined
     * @param viewSpecs            - is the view specifications
     * @param filterExpressions    - the named window filters
     * @param streamSpecOptions    - additional options such as unidirectional stream in a join
     * @param optPropertyEvaluator - for nested events
     */
    public NamedWindowConsumerStreamSpec(String windowName, String optionalAsName, ViewSpec[] viewSpecs, List<ExprNode> filterExpressions, StreamSpecOptions streamSpecOptions, PropertyEvaluator optPropertyEvaluator) {
        super(optionalAsName, viewSpecs, streamSpecOptions);
        this.windowName = windowName;
        this.filterExpressions = filterExpressions;
        this.optPropertyEvaluator = optPropertyEvaluator;
    }

    /**
     * Returns the window name.
     *
     * @return window name
     */
    public String getWindowName() {
        return windowName;
    }

    /**
     * Returns list of filter expressions onto the named window, or no filter expressions if none defined.
     *
     * @return list of filter expressions
     */
    public List<ExprNode> getFilterExpressions() {
        return filterExpressions;
    }

    public PropertyEvaluator getOptPropertyEvaluator() {
        return optPropertyEvaluator;
    }

    public int getConsumerSpecIndexAmongAll(NamedWindowConsumerStreamSpec[] consumerSpecAll) {
        for (int i = 0; i < consumerSpecAll.length; i++) {
            if (this == consumerSpecAll[i]) {
                return i;
            }
        }
        throw new EPException("Failed to find find named window consumer spec among list of known consumers");
    }
}