/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.joran.conditional;

import ch.qos.logback.core.spi.PropertyContainer;
import ch.qos.logback.core.util.OptionHelper;

public class PropertyWrapperForScripts {

    PropertyContainer local;
    PropertyContainer context;

    // this method is invoked by reflection in PropertyEvalScriptBuilder
    public void setPropertyContainers(PropertyContainer local, PropertyContainer context) {
        this.local = local;
        this.context = context;
    }

    public boolean isNull(String k) {
        String val = OptionHelper.propertyLookup(k, local, context);
        return (val == null);
    }

    public boolean isDefined(String k) {
        String val = OptionHelper.propertyLookup(k, local, context);
        return (val != null);
    }

    public String p(String k) {
        return property(k);
    }

    public String property(String k) {
        String val = OptionHelper.propertyLookup(k, local, context);
        if (val != null)
            return val;
        else
            return "";
    }
}