/*
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.xml.bind;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.logging.ConsoleHandler;
import java.util.logging.Level;
import java.util.logging.Logger;

import static javax.xml.bind.JAXBContext.JAXB_CONTEXT_FACTORY;

//import java.lang.reflect.InvocationTargetException;

/**
 * This class is package private and therefore is not exposed as part of the 
 * JAXB API.
 *
 * This code is designed to implement the JAXB 1.0 spec pluggability feature
 *
 * @author <ul><li>Ryan Shoemaker, Sun Microsystems, Inc.</li></ul>
 * @version $Revision: 1.20 $
 * @see JAXBContext
 */
class ContextFinder {
    private static final Logger logger;
    static {
        logger = Logger.getLogger("javax.xml.bind");
        try {
            if (System.getProperty("jaxb.debug", null) != null) {
                // disconnect the logger from a bigger framework (if any)
                // and take the matters into our own hands
                logger.setUseParentHandlers(false);
                logger.setLevel(Level.ALL);
                ConsoleHandler handler = new ConsoleHandler();
                handler.setLevel(Level.ALL);
                logger.addHandler(handler);
            } else {
                // don't change the setting of this logger
                // to honor what other frameworks
                // have done on configurations.
            }
        } catch(Throwable t) {
            // just to be extra safe. in particular System.getProperty may throw
            // SecurityException.
        }
    }

    /**
     * If the {@link InvocationTargetException} wraps an exception that shouldn't be wrapped,
     * throw the wrapped exception.
     */
    private static void handleInvocationTargetException(InvocationTargetException x) throws JAXBException {
        Throwable t = x.getTargetException();
        if( t != null ) {
            if( t instanceof JAXBException )
                // one of our exceptions, just re-throw
                throw (JAXBException)t;
            if( t instanceof RuntimeException )
                // avoid wrapping exceptions unnecessarily
                throw (RuntimeException)t;
            if( t instanceof Error )
                throw (Error)t;
        }
    }


    /**
     * Determine if two types (JAXBContext in this case) will generate a ClassCastException.
     *
     * For example, (targetType)originalType
     *
     * @param originalType
     *          The Class object of the type being cast
     * @param targetType
     *          The Class object of the type that is being cast to
     * @throws JAXBException
     *          If the cast would fail
     */
    private static void handleClassCastException(Class originalType, Class targetType) throws JAXBException {
        final URL targetTypeURL = which(targetType);

        throw new JAXBException(Messages.format(Messages.ILLEGAL_CAST,
                // we don't care where the impl class is, we want to know where JAXBContext lives in the impl
                // class' ClassLoader
                originalType.getClass().getClassLoader().getResource("javax/xml/bind/JAXBContext.class").toString(),

                targetTypeURL.toString()));
    }