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Provides runtime and analysis for behavioral programs written in JavaScript. It can run stand-alone (from the commmandline) or be embedded in larger JVM-based systems.

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/*
 * The MIT License
 *
 * Copyright 2018 michael.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package il.ac.bgu.cs.bp.bpjs.execution.jsproxy;

import il.ac.bgu.cs.bp.bpjs.internal.ScriptableUtils;
import il.ac.bgu.cs.bp.bpjs.model.BProgram;

import java.io.PrintStream;
import java.text.MessageFormat;
import java.util.Arrays;
import java.util.Set;

/**
 * Simple logging mechanism for {@link BProgram}s.
 * 
 * @author michael
 */
public class BpLog implements java.io.Serializable {
    
    public enum LogLevel {
        Off, Warn, Info, Fine
    }
    
    public static final LogLevel DEFAULT_LOG_LEVEL = LogLevel.Info;
    
    LogLevel level = DEFAULT_LOG_LEVEL;
    private PrintStream out;

    public BpLog( PrintStream aStream ){
        out = aStream;
    }

    public BpLog() {
        this( System.out );
    }

    public void warn(Object msg, Object ...args) {
        log(LogLevel.Warn, msg, args);
    }

    public void info(Object msg, Object ...args) {
        log(LogLevel.Info, msg, args);
    }
    

    public void fine(Object msg, Object ...args) {
        log(LogLevel.Fine, msg, args);
    }

    public void log(LogLevel lvl, Object msg, Object[] args) {
        if (level.compareTo(lvl) >= 0) {
            out.println("[BP][" + lvl.name() + "] " +
                (((args==null)||(args.length > 0)) 
                   ? MessageFormat.format( (msg!=null ? msg.toString():""), Arrays.stream(args).map(this::formatArg).toArray())
                   : ScriptableUtils.stringify(msg)));
        }
    }

    public void setLevel(String levelName) {
        synchronized (this) {
            level = LogLevel.valueOf(levelName);
        }
    }

    public String getLevel() {
        return level.name();
    }
    
    private static final Set PASS_THROUGH = Set.of(Integer.class, Long.class, 
        Short.class, Double.class, Float.class, String.class);
    
    private Object formatArg(Object arg) {
        if ( arg == null ) return arg;
        if ( PASS_THROUGH.contains(arg.getClass()) ) return arg;
        return ScriptableUtils.stringify(arg);
    }

    public void setLoggerPrintStream(PrintStream printStream){
        out = printStream;
    }
    
}