jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/FactoryFinder.java@b0610cd08440

     1 /*

     2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.xml.internal.org.jvnet.mimepull;

    28 import java.io.BufferedReader;

    29 import java.io.IOException;

    30 import java.io.InputStream;

    31 import java.io.InputStreamReader;

    32 import java.util.logging.Level;

    33 import java.util.logging.Logger;

    35 class FactoryFinder {

    37     private static ClassLoader cl = FactoryFinder.class.getClassLoader();

    39     static Object find(String factoryId) throws ClassNotFoundException,

    40             InstantiationException, IllegalAccessException {

    41         String systemProp = System.getProperty(factoryId);

    42         if (systemProp != null) {

    43             return newInstance(systemProp);

    44         }

    46         String providerName = findJarServiceProviderName(factoryId);

    47         if (providerName != null && providerName.trim().length() > 0) {

    48             return newInstance(providerName);

    49         }

    51         return null;

    52     }

    54     static Object newInstance(String className) throws ClassNotFoundException,

    55             InstantiationException, IllegalAccessException {

    56         Class providerClass = cl.loadClass(className);

    57         Object instance = providerClass.newInstance();

    58         return instance;

    59     }

    61     private static String findJarServiceProviderName(String factoryId) {

    62         String serviceId = "META-INF/services/" + factoryId;

    63         InputStream is;

    64         is = cl.getResourceAsStream(serviceId);

    66         if (is == null) {

    67             return null;

    68         }

    70         String factoryClassName;

    71         BufferedReader rd = null;

    72         try {

    73             try {

    74                 rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));

    75             } catch (java.io.UnsupportedEncodingException e) {

    76                 rd = new BufferedReader(new InputStreamReader(is));

    77             }

    78             try {

    79                 factoryClassName = rd.readLine();

    80             } catch (IOException x) {

    81                 return null;

    82             }

    83         } finally {

    84             if (rd != null) {

    85                 try {

    86                     rd.close();

    87                 } catch (IOException ex) {

    88                     Logger.getLogger(FactoryFinder.class.getName()).log(Level.INFO, null, ex);

    89                 }

    90             }

    91         }

    93         return factoryClassName;

    94     }

    96 }

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