Add optimized util.Bits for Java 9 and later versions

7722890e · Evgenij Ryazanov · b4f16fe3 · 7722890e · 7722890e · 7722890e
--- a/h2/src/java9/precompiled/org/h2/util/Bits.class
+++ b/h2/src/java9/precompiled/org/h2/util/Bits.class
--- a/h2/src/java9/src/org/h2/util/Bits.java
+++ b/h2/src/java9/src/org/h2/util/Bits.java
+/*
+ * Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+ * and the EPL 1.0 (http://h2database.com/html/license.html).
+ * Initial Developer: H2 Group
+ */
+package org.h2.util;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.util.UUID;
+
+/**
+ * Manipulations with bytes and arrays. Specialized implementation for Java 9
+ * and later versions.
+ */
+public final class Bits {
+
+    /**
+     * VarHandle giving access to elements of a byte[] array viewed as if it were a
+     * int[] array on big-endian system.
+     */
+    private static final VarHandle INT_VH = MethodHandles.byteArrayViewVarHandle(int[].class, ByteOrder.BIG_ENDIAN);
+
+    /**
+     * VarHandle giving access to elements of a byte[] array viewed as if it were a
+     * long[] array on big-endian system.
+     */
+    private static final VarHandle LONG_VH = MethodHandles.byteArrayViewVarHandle(long[].class, ByteOrder.BIG_ENDIAN);
+
+    /**
+     * Reads a int value from the byte array at the given position in big-endian
+     * order.
+     *
+     * @param buff
+     *            the byte array
+     * @param pos
+     *            the position
+     * @return the value
+     */
+    public static int readInt(byte[] buff, int pos) {
+        return (int) INT_VH.get(buff, pos);
+    }
+
+    /**
+     * Reads a long value from the byte array at the given position in big-endian
+     * order.
+     *
+     * @param buff
+     *            the byte array
+     * @param pos
+     *            the position
+     * @return the value
+     */
+    public static long readLong(byte[] buff, int pos) {
+        return (long) LONG_VH.get(buff, pos);
+    }
+
+    /**
+     * Converts UUID value to byte array in big-endian order.
+     *
+     * @param msb
+     *            most significant part of UUID
+     * @param lsb
+     *            least significant part of UUID
+     * @return byte array representation
+     */
+    public static byte[] uuidToBytes(long msb, long lsb) {
+        byte[] buff = new byte[16];
+        LONG_VH.set(buff, 0, msb);
+        LONG_VH.set(buff, 8, lsb);
+        return buff;
+    }
+
+    /**
+     * Converts UUID value to byte array in big-endian order.
+     *
+     * @param uuid
+     *            UUID value
+     * @return byte array representation
+     */
+    public static byte[] uuidToBytes(UUID uuid) {
+        return uuidToBytes(uuid.getMostSignificantBits(), uuid.getLeastSignificantBits());
+    }
+
+    /**
+     * Writes a int value to the byte array at the given position in big-endian
+     * order.
+     *
+     * @param buff
+     *            the byte array
+     * @param pos
+     *            the position
+     * @param x
+     *            the value to write
+     */
+    public static void writeInt(byte[] buff, int pos, int x) {
+        INT_VH.set(buff, pos, x);
+    }
+
+    /**
+     * Writes a long value to the byte array at the given position in big-endian
+     * order.
+     *
+     * @param buff
+     *            the byte array
+     * @param pos
+     *            the position
+     * @param x
+     *            the value to write
+     */
+    public static void writeLong(byte[] buff, int pos, long x) {
+        LONG_VH.set(buff, pos, x);
+    }
+
+    private Bits() {
+    }
+}
--- a/h2/src/java9/src/org/h2/util/package.html
+++ b/h2/src/java9/src/org/h2/util/package.html
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<!--
+Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0, Version 1.0,
+and under the Eclipse Public License, Version 1.0
+Initial Developer: H2 Group
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<head><meta http-equiv="Content-Type" content="text/html;charset=utf-8" /><title>
+Javadoc package documentation
+</title></head><body style="font: 9pt/130% Tahoma, Arial, Helvetica, sans-serif; font-weight: normal;"><p>
+
+Internal utility classes reimplemented for Java 9 and later versions.
+
+</p></body></html>
\ No newline at end of file
--- a/h2/src/main/META-INF/MANIFEST.MF
+++ b/h2/src/main/META-INF/MANIFEST.MF
@@ -13,6 +13,7 @@ Bundle-Vendor: H2 Group
 Bundle-Version: ${version}
 Bundle-License: http://www.h2database.com/html/license.html
 Bundle-Category: jdbc
+Multi-Release: true
 Import-Package: javax.management,
 javax.naming;resolution:=optional,
 javax.naming.spi;resolution:=optional,

--- a/h2/src/main/org/h2/util/Bits.java
+++ b/h2/src/main/org/h2/util/Bits.java
@@ -14,6 +14,12 @@ import java.util.UUID;
 */
 public final class Bits {

+    /*
+     * Signatures of methods should match with
+     * h2/src/java9/src/org/h2/util/Bits.java and precompiled
+     * h2/src/java9/precompiled/org/h2/util/Bits.class.
+     */
+
    /**
     * Reads a int value from the byte array at the given position in big-endian
     * order.

--- a/h2/src/tools/org/h2/build/Build.java
+++ b/h2/src/tools/org/h2/build/Build.java
@@ -446,8 +446,10 @@ public class Build extends BuildBase {
    @Description(summary = "Create the regular h2.jar file.")
    public void jar() {
        compile();
+        FileList files = files("src/java9/precompiled");
+        copy("temp/META-INF/versions/9", files, "src/java9/precompiled");
        manifest("H2 Database Engine", "org.h2.tools.Console");
-        FileList files = files("temp").
+        files = files("temp").
            exclude("temp/android/*").
            exclude("temp/org/h2/android/*").
            exclude("temp/org/h2/build/*").

--- a/h2/src/tools/org/h2/build/code/CheckTextFiles.java
+++ b/h2/src/tools/org/h2/build/code/CheckTextFiles.java
@@ -30,7 +30,7 @@ public class CheckTextFiles {
            "Driver", "Processor", "prefs" };
    private static final String[] SUFFIX_IGNORE = { "gif", "png", "odg", "ico",
            "sxd", "layout", "res", "win", "jar", "task", "svg", "MF", "mf",
-            "sh", "DS_Store", "prop" };
+            "sh", "DS_Store", "prop", "class" };
    private static final String[] SUFFIX_CRLF = { "bat" };

    private static final boolean ALLOW_TAB = false;

--- a/h2/src/tools/org/h2/build/doc/SpellChecker.java
+++ b/h2/src/tools/org/h2/build/doc/SpellChecker.java
@@ -31,7 +31,7 @@ public class SpellChecker {
            "properties", "task", "MF", "mf", "sh", "" };
    private static final String[] IGNORE = { "dev", "nsi", "gif", "png", "odg",
            "ico", "sxd", "zip", "bz2", "rc", "layout", "res", "dll", "jar",
-            "svg", "prefs", "prop", "iml" };
+            "svg", "prefs", "prop", "iml", "class" };
    private static final String DELIMITERS =
            " \n.();-\"=,*/{}_<>+\r:'@[]&\\!#|?$^%~`\t";
    private static final String PREFIX_IGNORE = "abc";