8192879: jdk.internal.util.jar.VersionedStream is no longer needed
authormchung
Thu, 30 Nov 2017 19:58:20 -0800
changeset 48036 72d50895cb81
parent 48035 69d409f1b81e
child 48038 3d4bd4d33a67
8192879: jdk.internal.util.jar.VersionedStream is no longer needed Reviewed-by: sherman
src/java.base/share/classes/jdk/internal/util/jar/VersionedStream.java
--- a/src/java.base/share/classes/jdk/internal/util/jar/VersionedStream.java	Thu Nov 30 17:28:21 2017 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,85 +0,0 @@
-/*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.internal.util.jar;
-
-import java.util.Objects;
-import java.util.jar.JarEntry;
-import java.util.jar.JarFile;
-import java.util.stream.Stream;
-
-public class VersionedStream {
-    private static final String META_INF_VERSIONS = "META-INF/versions/";
-
-    /**
-     * Returns a stream of versioned entries, derived from the base names of
-     * all entries in a multi-release {@code JarFile} that are present either in
-     * the base directory or in any versioned directory with a version number
-     * less than or equal to the {@code Runtime.Version::major} that the
-     * {@code JarFile} was opened with.  These versioned entries are aliases
-     * for the real entries -- i.e. the names are base names and the content
-     * may come from a versioned directory entry.  If the {@code jarFile} is not
-     * a multi-release jar, a stream of all entries is returned.
-     *
-     * @param jf the input JarFile
-     * @return stream of entries
-     * @since 9
-     */
-    public static Stream<JarEntry> stream(JarFile jf) {
-        if (jf.isMultiRelease()) {
-            int version = jf.getVersion().major();
-            return jf.stream()
-                    .map(je -> getBaseSuffix(je, version))
-                    .filter(Objects::nonNull)
-                    .distinct()
-                    .map(jf::getJarEntry);
-        }
-        return jf.stream();
-    }
-
-    private static String getBaseSuffix(JarEntry je, int version) {
-        String name = je.getName();
-        if (name.startsWith(META_INF_VERSIONS)) {
-            int len = META_INF_VERSIONS.length();
-            int index = name.indexOf('/', len);
-            if (index == -1 || index == (name.length() - 1)) {
-                // filter out META-INF/versions/* and META-INF/versions/*/
-                return null;
-            }
-            try {
-                if (Integer.parseInt(name, len, index, 10) > version) {
-                    // not an integer
-                    return null;
-                }
-            } catch (NumberFormatException x) {
-                // silently remove malformed entries
-                return null;
-            }
-            // We know name looks like META-INF/versions/*/*
-            return name.substring(index + 1);
-        }
-        return name;
-    }
-}