8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/time/zone/TzdbZoneRulesProvider.java

@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2012, 2013, 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.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Copyright (c) 2009-2012, Stephen Colebourne & Michael Nascimento Santos
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ *  * Neither the name of JSR-310 nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package java.time.zone;
+
+import java.io.ByteArrayInputStream;
+import java.io.BufferedInputStream;
+import java.io.DataInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.StreamCorruptedException;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.Objects;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Loads time-zone rules for 'TZDB'.
+ *
+ * @since 1.8
+ */
+final class TzdbZoneRulesProvider extends ZoneRulesProvider {
+
+    /**
+     * All the regions that are available.
+     */
+    private List<String> regionIds;
+    /**
+     * Version Id of this tzdb rules
+     */
+    private String versionId;
+    /**
+     * Region to rules mapping
+     */
+    private final Map<String, Object> regionToRules = new ConcurrentHashMap<>();
+
+    /**
+     * Creates an instance.
+     * Created by the {@code ServiceLoader}.
+     *
+     * @throws ZoneRulesException if unable to load
+     */
+    public TzdbZoneRulesProvider() {
+        try {
+            String libDir = System.getProperty("java.home") + File.separator + "lib";
+            try (DataInputStream dis = new DataInputStream(
+                     new BufferedInputStream(new FileInputStream(
+                         new File(libDir, "tzdb.dat"))))) {
+                load(dis);
+            }
+        } catch (Exception ex) {
+            throw new ZoneRulesException("Unable to load TZDB time-zone rules", ex);
+        }
+    }
+
+    @Override
+    protected Set<String> provideZoneIds() {
+        return new HashSet<>(regionIds);
+    }
+
+    @Override
+    protected ZoneRules provideRules(String zoneId, boolean forCaching) {
+        // forCaching flag is ignored because this is not a dynamic provider
+        Object obj = regionToRules.get(zoneId);
+        if (obj == null) {
+            throw new ZoneRulesException("Unknown time-zone ID: " + zoneId);
+        }
+        try {
+            if (obj instanceof byte[]) {
+                byte[] bytes = (byte[]) obj;
+                DataInputStream dis = new DataInputStream(new ByteArrayInputStream(bytes));
+                obj = Ser.read(dis);
+                regionToRules.put(zoneId, obj);
+            }
+            return (ZoneRules) obj;
+        } catch (Exception ex) {
+            throw new ZoneRulesException("Invalid binary time-zone data: TZDB:" + zoneId + ", version: " + versionId, ex);
+        }
+    }
+
+    @Override
+    protected NavigableMap<String, ZoneRules> provideVersions(String zoneId) {
+        TreeMap<String, ZoneRules> map = new TreeMap<>();
+        ZoneRules rules = getRules(zoneId, false);
+        if (rules != null) {
+            map.put(versionId, rules);
+        }
+        return map;
+    }
+
+    /**
+     * Loads the rules from a DateInputStream, often in a jar file.
+     *
+     * @param dis  the DateInputStream to load, not null
+     * @throws Exception if an error occurs
+     */
+    private void load(DataInputStream dis) throws Exception {
+        if (dis.readByte() != 1) {
+            throw new StreamCorruptedException("File format not recognised");
+        }
+        // group
+        String groupId = dis.readUTF();
+        if ("TZDB".equals(groupId) == false) {
+            throw new StreamCorruptedException("File format not recognised");
+        }
+        // versions
+        int versionCount = dis.readShort();
+        for (int i = 0; i < versionCount; i++) {
+            versionId = dis.readUTF();
+        }
+        // regions
+        int regionCount = dis.readShort();
+        String[] regionArray = new String[regionCount];
+        for (int i = 0; i < regionCount; i++) {
+            regionArray[i] = dis.readUTF();
+        }
+        regionIds = Arrays.asList(regionArray);
+        // rules
+        int ruleCount = dis.readShort();
+        Object[] ruleArray = new Object[ruleCount];
+        for (int i = 0; i < ruleCount; i++) {
+            byte[] bytes = new byte[dis.readShort()];
+            dis.readFully(bytes);
+            ruleArray[i] = bytes;
+        }
+        // link version-region-rules
+        for (int i = 0; i < versionCount; i++) {
+            int versionRegionCount = dis.readShort();
+            regionToRules.clear();
+            for (int j = 0; j < versionRegionCount; j++) {
+                String region = regionArray[dis.readShort()];
+                Object rule = ruleArray[dis.readShort() & 0xffff];
+                regionToRules.put(region, rule);
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "TZDB[" + versionId + "]";
+    }
+}