buildhelper.java

来自「Java mulitplayer strategy game. Adaptati」· Java 代码 · 共 80 行

package net.sf.jawp.util;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;


/**
 * helper for retrieving build specific data
 * @author jarek
 *
 */
public class BuildHelper
{
	private static final Log LOG  = Log.getLog(BuildHelper.class);
	
	private static final String BUILD_PROPERTIES = "/build.properties";
	
	private static final String BUILD_NR_PROPERTY = "build.nr";
	
	private static final String DEFAULT_BUILD_NR = "build.local";
	
	/**
	 * retrieves build nr as string
	 * @return
	 */
	public static  String getBuildNR()
	{
		String defVal = DEFAULT_BUILD_NR;
		final String sysBuild = System.getenv("build_number");
		if ( sysBuild != null && sysBuild.length() > 0)
		{
			defVal = sysBuild;
		}
		return getProperty(BUILD_NR_PROPERTY, defVal);
	}
	
	/**
	 * returns full build description
	 * @return
	 */
	public static String getBuildDesc()
	{
		return "<" + getBuildNR() + ">";
	}
	
	private static String getProperty( final String name, final String defaultValue)
	{
		final InputStream is = BuildHelper.class.getResourceAsStream( BuildHelper.BUILD_PROPERTIES);
		if ( is != null)
		{
			final Properties props = new Properties();
			try
			{
				props.load( is );
				return props.getProperty(name, defaultValue);
			} 
			catch (final IOException e)
			{
				LOG.error(e, e);
			}
			finally
			{
				try
				{
					is.close();
				}
				catch (final IOException e)
				{
					LOG.error(e, e);
				}
				
			}
		}
		return defaultValue;
	}
	
	
}