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This module contains the Metro runtime code.
There is a newer version: 4.0.4
/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.ws.config.metro.parser;

import com.sun.istack.logging.Logger;
import com.sun.xml.ws.api.ResourceLoader;
import com.sun.xml.ws.api.server.Container;
import com.sun.xml.ws.policy.privateutil.PolicyUtils;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.ws.WebServiceException;

/**
 *
 * @author Fabian Ritzmann
 */
public class MetroParser {

    private static final Logger LOGGER = Logger.getLogger(MetroParser.class);
    
    private static final String SERVLET_CONTEXT_CLASSNAME = "javax.servlet.ServletContext";
    // Prefixing with META-INF/ instead of /META-INF/. /META-INF/ is working fine
    // when loading from a JAR file but not when loading from a plain directory.
    private static final String JAR_PREFIX = "META-INF/";
    private static final String WAR_PREFIX = "/WEB-INF/";
    private static final String WEBSERVICES_NAME = "webservices.xml";
    private static final String METRO_WEBSERVICES_NAME = "metro-webservices.xml";

    private static final XMLInputFactory inputFactory = XMLInputFactory.newInstance();

    /**
     * Private constructor for the utility class to prevent class instantiation
     */
    private MetroParser() {
    }

    // Pulls together the results of MetroWsParser and WsParser

    public static void parse(final Container container) {
        findConfigFile(METRO_WEBSERVICES_NAME, container);

        findConfigFile(WEBSERVICES_NAME, container);
    }

    private static URL findConfigFile(final String configFileName, final Container container)
            throws WebServiceException {
        URL configFileUrl = null;
        try {
            final ResourceLoader resourceLoader = (container != null) ? container.getSPI(ResourceLoader.class) : null;
            if (resourceLoader != null) {
                configFileUrl = resourceLoader.getResource(configFileName);
            }

            if (configFileUrl == null && container != null) {
                final Object context;
                try {
                    final Class contextClass = Class.forName(SERVLET_CONTEXT_CLASSNAME);
                    context = container.getSPI(contextClass);
                    if (context != null) {
                        // Move PolicyUtils method into istack
                        configFileUrl = PolicyUtils.ConfigFile.loadFromContext(WAR_PREFIX + configFileName, context);
                    }
                } catch (ClassNotFoundException e) {
                    if (LOGGER.isLoggable(Level.FINE)) {
                        // TODO logging message
                        LOGGER.fine("Cannot find servlet context");
                    }
                }
            }

            // If we did not get a config file from the container, fall back to class path
            if (configFileUrl == null) {
                // Try META-INF
                final StringBuilder examinedPath = new StringBuilder(JAR_PREFIX).append(configFileName);
                configFileUrl = PolicyUtils.ConfigFile.loadFromClasspath(examinedPath.toString());
            }

            return configFileUrl;
        } catch (MalformedURLException e) {
            // TODO logging message
            throw LOGGER.logSevereException(new WebServiceException("Failed to load file", e));
        }
    }

    private static XMLStreamReader urlToReader(URL url) throws WebServiceException {
        try {
            return inputFactory.createXMLStreamReader(url.openStream());
        } catch (IOException e) {
            // TODO logging message
            throw LOGGER.logSevereException(new WebServiceException("Failed to load URL", e));
        } catch (XMLStreamException e) {
            // TODO logging message
            throw LOGGER.logSevereException(new WebServiceException("Failed to load URL", e));
        }
    }

}