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Complex event processing and event series analysis component

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/**************************************************************************************
 * Copyright (C) 2006-2015 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 java.io.StringWriter;

public class SubstitutionParameterExpressionIndexed extends SubstitutionParameterExpressionBase
{
    private static final long serialVersionUID = -8795823095298045304L;
    private final int index;

    /**
     * Ctor.
     * @param index is the index of the substitution parameter
     */
    public SubstitutionParameterExpressionIndexed(int index)
    {
        this.index = index;
    }

    protected void toPrecedenceFreeEPLUnsatisfied(StringWriter writer) {
        writer.write("?");
    }

    public int getIndex() {
        return index;
    }
}