src/jdk.internal.vm.compiler/share/classes/jdk.internal.vm.compiler.libgraal/src/jdk/internal/vm/compiler/libgraal/OptionsEncoder.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/jdk.internal.vm.compiler.libgraal/src/jdk/internal/vm/compiler/libgraal/OptionsEncoder.java Tue Apr 23 22:55:09 2019 +0200
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2018, 2019, 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.
+ *
+ * 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.vm.compiler.libgraal;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Facilities for encoding/decoding a set of options to/from a byte array.
+ */
+public final class OptionsEncoder {
+
+ private OptionsEncoder() {
+ }
+
+ /**
+ * Determines if {@code value} is supported by {@link #encode(Map)}.
+ */
+ public static boolean isValueSupported(Object value) {
+ if (value == null) {
+ return false;
+ }
+ Class<?> valueClass = value.getClass();
+ return valueClass == Boolean.class ||
+ valueClass == Byte.class ||
+ valueClass == Short.class ||
+ valueClass == Character.class ||
+ valueClass == Integer.class ||
+ valueClass == Long.class ||
+ valueClass == Float.class ||
+ valueClass == Double.class ||
+ valueClass == String.class ||
+ value.getClass().isEnum();
+ }
+
+ /**
+ * Encodes {@code options} into a byte array.
+ *
+ * @throws IllegalArgumentException if any value in {@code options} is not
+ * {@linkplain #isValueSupported(Object) supported}
+ */
+ public static byte[] encode(final Map<String, Object> options) {
+ try (ByteArrayOutputStream baout = new ByteArrayOutputStream()) {
+ try (DataOutputStream out = new DataOutputStream(baout)) {
+ out.writeInt(options.size());
+ for (Map.Entry<String, Object> e : options.entrySet()) {
+ final String key = e.getKey();
+ out.writeUTF(key);
+ final Object value = e.getValue();
+ final Class<?> valueClz = value.getClass();
+ if (valueClz == Boolean.class) {
+ out.writeByte('Z');
+ out.writeBoolean((Boolean) value);
+ } else if (valueClz == Byte.class) {
+ out.writeByte('B');
+ out.writeByte((Byte) value);
+ } else if (valueClz == Short.class) {
+ out.writeByte('S');
+ out.writeShort((Short) value);
+ } else if (valueClz == Character.class) {
+ out.writeByte('C');
+ out.writeChar((Character) value);
+ } else if (valueClz == Integer.class) {
+ out.writeByte('I');
+ out.writeInt((Integer) value);
+ } else if (valueClz == Long.class) {
+ out.writeByte('J');
+ out.writeLong((Long) value);
+ } else if (valueClz == Float.class) {
+ out.writeByte('F');
+ out.writeFloat((Float) value);
+ } else if (valueClz == Double.class) {
+ out.writeByte('D');
+ out.writeDouble((Double) value);
+ } else if (valueClz == String.class) {
+ out.writeByte('U');
+ out.writeUTF((String) value);
+ } else if (valueClz.isEnum()) {
+ out.writeByte('U');
+ out.writeUTF(((Enum<?>) value).name());
+ } else {
+ throw new IllegalArgumentException(String.format("Key: %s, Value: %s, Value type: %s", key, value, valueClz));
+ }
+ }
+ }
+ return baout.toByteArray();
+ } catch (IOException ioe) {
+ throw new IllegalArgumentException(ioe);
+ }
+ }
+
+ /**
+ * Decodes {@code input} into a name/value map.
+ *
+ * @throws IllegalArgumentException if {@code input} cannot be decoded
+ */
+ public static Map<String, Object> decode(byte[] input) {
+ Map<String, Object> res = new HashMap<>();
+ try (DataInputStream in = new DataInputStream(new ByteArrayInputStream(input))) {
+ final int size = in.readInt();
+ for (int i = 0; i < size; i++) {
+ final String key = in.readUTF();
+ final Object value;
+ final byte type = in.readByte();
+ switch (type) {
+ case 'Z':
+ value = in.readBoolean();
+ break;
+ case 'B':
+ value = in.readByte();
+ break;
+ case 'S':
+ value = in.readShort();
+ break;
+ case 'C':
+ value = in.readChar();
+ break;
+ case 'I':
+ value = in.readInt();
+ break;
+ case 'J':
+ value = in.readLong();
+ break;
+ case 'F':
+ value = in.readFloat();
+ break;
+ case 'D':
+ value = in.readDouble();
+ break;
+ case 'U':
+ value = in.readUTF();
+ break;
+ default:
+ throw new IllegalArgumentException("Unsupported value type: " + Integer.toHexString(type));
+ }
+ res.put(key, value);
+ }
+ } catch (IOException ioe) {
+ throw new IllegalArgumentException(ioe);
+ }
+ return res;
+ }
+}
+