org.mobicents.servlet.sip.undertow.rules.ExistsRule Maven / Gradle / Ivy

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/*
 * TeleStax, Open Source Cloud Communications
 * Copyright 2011-2015, Telestax Inc and individual contributors
 * by the @authors tag.
 *
 * This program is free software: you can redistribute it and/or modify
 * under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see 
 */

package org.mobicents.servlet.sip.undertow.rules;

import javax.servlet.sip.SipServletRequest;

import org.mobicents.servlet.sip.core.descriptor.MatchingRule;

/**
 * @author Thomas Leseney
 *
 *         This class is based on the contents of org.mobicents.servlet.sip.catalina.rules package from sip-servlet-as7 project,
 *         re-implemented for jboss as10 (wildfly) by:
 * @author [email protected]
 */
public class ExistsRule extends RequestRule implements MatchingRule {

    public ExistsRule(String var) {
        super(var);
    }

    public boolean matches(SipServletRequest request) {
        return getValue(request) != null;
    }

    public String getExpression() {
        return "(" + getVarName() + " != null)";
    }
}