// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.configuration;

import java.io.*;

import org.litesoft.servlet.*;

public class WebInfConfigAccessorLocator extends ConfigAccessorLocator
{
    public static final String DEFAULT_WEB_INF_PROPERTIES_NAME = "Properties.properties";

    public WebInfConfigAccessorLocator( String pAppNameForPropertyFileName )
    {
        super( pAppNameForPropertyFileName + ".properties" );
    }

    @Override
    public ConfigDataAccessor createConfigDataAccessor()
    {
        ConfigDataAccessor found = searchForConfigFileInWebInf();
        if ( found == null )
        {
            if ( null == (found = searchForConfigFileInFileSystem()) )
            {
                throw unableToLocate();
            }
        }
        return found;
    }

    private ConfigDataAccessor searchForConfigFileInWebInf()
    {
        File zWebInfDir = WebInfLocator.getDir( this );
        if ( zWebInfDir == null )
        {
            return null;
        }
        File zFile = new File( zWebInfDir, DEFAULT_WEB_INF_PROPERTIES_NAME );
        if ( zFile.isFile() )
        {
            return loadConfigAccessorFrom( zFile );
        }
        zFile = new File( zWebInfDir, mRelativeConfigFilePath );
        if ( zFile.isFile() )
        {
            return loadConfigAccessorFrom( zFile );
        }
        return null;
    }
}