jdbcdatasourcefactory.java

非常棒的java数据库

/*
 * Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
 * (http://h2database.com/html/license.html).
 * Initial Developer: H2 Group
 */
package org.h2.jdbcx;

import java.util.Hashtable;

//#ifdef JDK14
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
//#endif

import org.h2.constant.SysProperties;
import org.h2.engine.Constants;
import org.h2.message.Trace;
import org.h2.message.TraceSystem;

/**
 * This class is used to create new DataSource objects.
 * An application should not use this class directly. 
 */
public class JdbcDataSourceFactory 
//#ifdef JDK14
implements ObjectFactory 
//#endif
{
    
    private static TraceSystem traceSystem;
    private Trace trace;
    
    static {
        org.h2.Driver.load();
        traceSystem = new TraceSystem(SysProperties.CLIENT_TRACE_DIRECTORY + "h2datasource" + Constants.SUFFIX_TRACE_FILE, false);
        traceSystem.setLevelFile(SysProperties.DATASOURCE_TRACE_LEVEL);
    }
    
    /**
     * The public constructor to create new factory objects.
     */
    public JdbcDataSourceFactory() {
        trace = traceSystem.getTrace("JDBCX");
    }
    
    /**
     * Creates a new object using the specified location or reference
     * information.
     * 
     * @param obj the reference (this factory only supports objects of type
     *            javax.naming.Reference)
     * @param name unused
     * @param nameCtx unused
     * @param environment unused
     * @return the new JdbcDataSource, or null if the reference class name is
     *         not JdbcDataSource.
     */
//#ifdef JDK14
    public synchronized Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable environment) throws Exception {
        trace.debug("getObjectInstance obj=" + obj + " name=" + name + " nameCtx=" + nameCtx + " environment=" + environment);
        Reference ref = (Reference) obj;
        if (ref.getClassName().equals(JdbcDataSource.class.getName())) {
            JdbcDataSource dataSource = new JdbcDataSource();
            dataSource.setURL((String) ref.get("url").getContent());
            dataSource.setUser((String) ref.get("user").getContent());
            dataSource.setPassword((String) ref.get("password").getContent());
            String s = (String) ref.get("loginTimeout").getContent();
            dataSource.setLoginTimeout(Integer.parseInt(s));
            return dataSource;
        }
        return null;
    }
//#endif    
    
    TraceSystem getTraceSystem() {
        return traceSystem;
    }
    
    Trace getTrace() {
        return trace;
    }
    
}