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.
/**
 * 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 java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

import ch.qos.logback.core.spi.PropertyContainer;
import org.codehaus.commons.compiler.CompileException;
import org.codehaus.janino.ClassBodyEvaluator;

import ch.qos.logback.core.spi.ContextAwareBase;

public class PropertyEvalScriptBuilder extends ContextAwareBase {

    private static String SCRIPT_PREFIX = "" + "public boolean evaluate() { return ";
    private static String SCRIPT_SUFFIX = "" + "; }";

    final PropertyContainer localPropContainer;

    PropertyEvalScriptBuilder(PropertyContainer localPropContainer) {
        this.localPropContainer = localPropContainer;
    }

    Map<String, String> map = new HashMap<String, String>();

    public Condition build(String script) throws IllegalAccessException, CompileException, InstantiationException, SecurityException, NoSuchMethodException,
                    IllegalArgumentException, InvocationTargetException {

        ClassBodyEvaluator cbe = new ClassBodyEvaluator();
        cbe.setImplementedInterfaces(new Class[] { Condition.class });
        cbe.setExtendedClass(PropertyWrapperForScripts.class);
        cbe.setParentClassLoader(ClassBodyEvaluator.class.getClassLoader());
        cbe.cook(SCRIPT_PREFIX + script + SCRIPT_SUFFIX);

        Class<?> clazz = cbe.getClazz();
        Condition instance = (Condition) clazz.newInstance();
        Method setMapMethod = clazz.getMethod("setPropertyContainers", PropertyContainer.class, PropertyContainer.class);
        setMapMethod.invoke(instance, localPropContainer, context);

        return instance;
    }

}