Showing the changes to java/pkg/com/sun/naming/internal/VersionHelper.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,155 @@ | ||
| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2006, 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 | + */ | |
| 25 | + | |
| 26 | +package com.sun.naming.internal; | |
| 27 | + | |
| 28 | +import java.io.InputStream; | |
| 29 | +import java.io.IOException; | |
| 30 | +import java.net.MalformedURLException; | |
| 31 | +import java.net.URL; | |
| 32 | +import java.util.Enumeration; | |
| 33 | +import java.util.StringTokenizer; | |
| 34 | +import java.util.Vector; | |
| 35 | + | |
| 36 | +import javax.naming.NamingEnumeration; | |
| 37 | + | |
| 38 | +/** | |
| 39 | + * VersionHelper was used by JNDI to accommodate differences between | |
| 40 | + * JDK 1.1.x and the Java 2 platform. As this is no longer necessary | |
| 41 | + * since JNDI's inclusion in the platform, this class currently | |
| 42 | + * serves as a set of utilities for performing system-level things, | |
| 43 | + * such as class-loading and reading system properties. | |
| 44 | + * | |
| 45 | + * @author Rosanna Lee | |
| 46 | + * @author Scott Seligman | |
| 47 | + */ | |
| 48 | + | |
| 49 | +public abstract class VersionHelper { | |
| 50 | + private static VersionHelper helper = null; | |
| 51 | + | |
| 52 | + final static String[] PROPS = new String[] { | |
| 53 | + javax.naming.Context.INITIAL_CONTEXT_FACTORY, | |
| 54 | + javax.naming.Context.OBJECT_FACTORIES, | |
| 55 | + javax.naming.Context.URL_PKG_PREFIXES, | |
| 56 | + javax.naming.Context.STATE_FACTORIES, | |
| 57 | + javax.naming.Context.PROVIDER_URL, | |
| 58 | + javax.naming.Context.DNS_URL, | |
| 59 | + // The following shouldn't create a runtime dependence on ldap package. | |
| 60 | + javax.naming.ldap.LdapContext.CONTROL_FACTORIES | |
| 61 | + }; | |
| 62 | + | |
| 63 | + public final static int INITIAL_CONTEXT_FACTORY = 0; | |
| 64 | + public final static int OBJECT_FACTORIES = 1; | |
| 65 | + public final static int URL_PKG_PREFIXES = 2; | |
| 66 | + public final static int STATE_FACTORIES = 3; | |
| 67 | + public final static int PROVIDER_URL = 4; | |
| 68 | + public final static int DNS_URL = 5; | |
| 69 | + public final static int CONTROL_FACTORIES = 6; | |
| 70 | + | |
| 71 | + VersionHelper() {} // Disallow anyone from creating one of these. | |
| 72 | + | |
| 73 | + static { | |
| 74 | + helper = new VersionHelper12(); | |
| 75 | + } | |
| 76 | + | |
| 77 | + public static VersionHelper getVersionHelper() { | |
| 78 | + return helper; | |
| 79 | + } | |
| 80 | + | |
| 81 | + public abstract Class loadClass(String className) | |
| 82 | + throws ClassNotFoundException; | |
| 83 | + | |
| 84 | + abstract Class loadClass(String className, ClassLoader cl) | |
| 85 | + throws ClassNotFoundException; | |
| 86 | + | |
| 87 | + public abstract Class loadClass(String className, String codebase) | |
| 88 | + throws ClassNotFoundException, MalformedURLException; | |
| 89 | + | |
| 90 | + /* | |
| 91 | + * Returns a JNDI property from the system properties. Returns | |
| 92 | + * null if the property is not set, or if there is no permission | |
| 93 | + * to read it. | |
| 94 | + */ | |
| 95 | + abstract String getJndiProperty(int i); | |
| 96 | + | |
| 97 | + /* | |
| 98 | + * Reads each property in PROPS from the system properties, and | |
| 99 | + * returns their values -- in order -- in an array. For each | |
| 100 | + * unset property, the corresponding array element is set to null. | |
| 101 | + * Returns null if there is no permission to call System.getProperties(). | |
| 102 | + */ | |
| 103 | + abstract String[] getJndiProperties(); | |
| 104 | + | |
| 105 | + /* | |
| 106 | + * Returns the resource of a given name associated with a particular | |
| 107 | + * class (never null), or null if none can be found. | |
| 108 | + */ | |
| 109 | + abstract InputStream getResourceAsStream(Class c, String name); | |
| 110 | + | |
| 111 | + /* | |
| 112 | + * Returns an input stream for a file in <java.home>/lib, | |
| 113 | + * or null if it cannot be located or opened. | |
| 114 | + * | |
| 115 | + * @param filename The file name, sans directory. | |
| 116 | + */ | |
| 117 | + abstract InputStream getJavaHomeLibStream(String filename); | |
| 118 | + | |
| 119 | + /* | |
| 120 | + * Returns an enumeration (never null) of InputStreams of the | |
| 121 | + * resources of a given name associated with a particular class | |
| 122 | + * loader. Null represents the bootstrap class loader in some | |
| 123 | + * Java implementations. | |
| 124 | + */ | |
| 125 | + abstract NamingEnumeration getResources(ClassLoader cl, String name) | |
| 126 | + throws IOException; | |
| 127 | + | |
| 128 | + /* | |
| 129 | + * Returns the context class loader associated with the current thread. | |
| 130 | + * Null indicates the bootstrap class loader in some Java implementations. | |
| 131 | + * | |
| 132 | + * @throws SecurityException if the class loader is not accessible. | |
| 133 | + */ | |
| 134 | + abstract ClassLoader getContextClassLoader(); | |
| 135 | + | |
| 136 | + static protected URL[] getUrlArray(String codebase) | |
| 137 | + throws MalformedURLException { | |
| 138 | + // Parse codebase into separate URLs | |
| 139 | + StringTokenizer parser = new StringTokenizer(codebase); | |
| 140 | + Vector vec = new Vector(10); | |
| 141 | + while (parser.hasMoreTokens()) { | |
| 142 | + vec.addElement(parser.nextToken()); | |
| 143 | + } | |
| 144 | + String[] url = new String[vec.size()]; | |
| 145 | + for (int i = 0; i < url.length; i++) { | |
| 146 | + url[i] = (String)vec.elementAt(i); | |
| 147 | + } | |
| 148 | + | |
| 149 | + URL[] urlArray = new URL[url.length]; | |
| 150 | + for (int i = 0; i < urlArray.length; i++) { | |
| 151 | + urlArray[i] = new URL(url[i]); | |
| 152 | + } | |
| 153 | + return urlArray; | |
| 154 | + } | |
| 155 | +} | |