package org.codehaus.mojo.exec;

import java.io.PrintStream;
import org.apache.maven.plugin.logging.Log;

/**
 * a Simple Maven Log that outputs to a Stream
 */
class StreamLog implements Log
{
    static final int DEBUG = 0;
    static final int INFO  = 1;
    static final int WARN  = 2;
    static final int ERROR = 3;

    private int level = INFO;

    public void setLevel( int level )
    {
        if ( level < DEBUG || level > ERROR ) 
        {
            throw new IllegalStateException( "invalid level: " + level );
        }
        this.level = level;
    }

    private final PrintStream s;

    StreamLog( PrintStream s )
    {
        this.s = s;
    } 

    public void debug( CharSequence content )
    {
        if ( isDebugEnabled() )
        {
            s.println( content );
        }
    }
   
    public void debug( CharSequence content, Throwable error )
    {
        if ( isDebugEnabled() )
        {
            s.println( content );
        }
    }
   
    public void debug( Throwable error )
    {
        if ( isDebugEnabled() )
        {
            error.printStackTrace( s );
        }
    }
   
    public void error( CharSequence content )
    {
        if ( isErrorEnabled() )
        {
            s.println( content );
        }
    }
   
    public void error( CharSequence content, Throwable error )
    {
        error( content );
        error( error );
    }
   
    public void error( Throwable error )
    {
        if ( isErrorEnabled() )
        {
            error.printStackTrace( s );
        }
    }
   
    public void info( CharSequence content )
    {
        if ( isInfoEnabled() )
        {
            s.println( content );
        }
    }
   
    public void info( CharSequence content, Throwable error )
    {
        info( content );
        info( error );
    }
   
    public void info( Throwable error )
    {
        if ( isInfoEnabled() )
        {
            error.printStackTrace( s );
        }
    }
   
    public boolean isDebugEnabled()
    {
        return level >= DEBUG;
    }
   
    public boolean isErrorEnabled()
    {
        return level >= ERROR;
    }
   
    public boolean isInfoEnabled()
    {
        return level >= INFO;
    }
   
    public boolean isWarnEnabled()
    {
        return level >= WARN;
    }
   
    public void warn( CharSequence content )
    {
        if ( isWarnEnabled() )
        {
            s.println( content );
        }
    }
   
    public void warn( CharSequence content, Throwable error )
    {
        warn( content );
        warn( error );
    }
   
    public void warn( Throwable error )
    {
        if ( isWarnEnabled() )
        {
            error.printStackTrace( s );
        }
    }
}