com.espertech.esper.rowregex.RowRegexExprNodeNested Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of esper Show documentation

Complex event processing and event series analysis component

There is a newer version: 7.1.0

/**************************************************************************************
 * 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.rowregex;

import java.io.StringWriter;

/**
 * Nested () regular expression in a regex expression tree.
 */
public class RowRegexExprNodeNested extends RowRegexExprNode
{
    private final RegexNFATypeEnum type;
    private final RowRegexExprRepeatDesc optionalRepeat;
    private static final long serialVersionUID = -2079284511194587570L;

    /**
     * Ctor.
     * @param type multiplicity and greedy
     */
    public RowRegexExprNodeNested(RegexNFATypeEnum type, RowRegexExprRepeatDesc optionalRepeat) {
        this.type = type;
        this.optionalRepeat = optionalRepeat;
    }

    /**
     * Returns multiplicity and greedy.
     * @return type
     */
    public RegexNFATypeEnum getType() {
        return type;
    }

    public RowRegexExprRepeatDesc getOptionalRepeat() {
        return optionalRepeat;
    }

    public void toPrecedenceFreeEPL(StringWriter writer) {
        this.getChildNodes().get(0).toEPL(writer, getPrecedence());
        writer.append(type.getOptionalPostfix());
    }

    public RowRegexExprNodePrecedenceEnum getPrecedence() {
        return RowRegexExprNodePrecedenceEnum.GROUPING;
    }
}