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70 lines
2.7 KiB
Java
70 lines
2.7 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.net.spi;
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import java.net.URLStreamHandlerFactory;
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/**
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* URL stream handler service-provider class.
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*
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* <p> A URL stream handler provider is a concrete subclass of this class that
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* has a zero-argument constructor. URL stream handler providers may be
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* installed in an instance of the Java platform by adding them to the
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* application class path.
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*
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* <p> A URL stream handler provider identifies itself with a
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* provider-configuration file named java.net.spi.URLStreamHandlerProvider in
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* the resource directory META-INF/services. The file should contain a list of
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* fully-qualified concrete URL stream handler provider class names, one per
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* line.
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*
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* <p> URL stream handler providers are located at runtime, as specified in the
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* {@linkplain java.net.URL#URL(String,String,int,String) URL constructor}.
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*
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* @since 9
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*/
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public abstract class URLStreamHandlerProvider
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implements URLStreamHandlerFactory
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{
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private static Void checkPermission() {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null)
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sm.checkPermission(new RuntimePermission("setFactory"));
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return null;
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}
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private URLStreamHandlerProvider(Void ignore) { }
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/**
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* Initializes a new URL stream handler provider.
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*
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* @throws SecurityException
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* If a security manager has been installed and it denies
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* {@link RuntimePermission}{@code ("setFactory")}.
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*/
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protected URLStreamHandlerProvider() {
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this(checkPermission());
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}
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}
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