src/jdk.internal.vm.compiler/share/classes/org.graalvm.options/src/org/graalvm/options/OptionDescriptors.java
--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.options/src/org/graalvm/options/OptionDescriptors.java Fri Feb 02 10:37:48 2018 -0500
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,186 +0,0 @@
-/*
- * Copyright (c) 2017, 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 org.graalvm.options;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.NoSuchElementException;
-
-/**
- * An interface to a set of {@link OptionDescriptor}s.
- *
- * @since 1.0
- */
-public interface OptionDescriptors extends Iterable<OptionDescriptor> {
-
- /**
- * An empty set of option descriptors.
- *
- * @since 1.0
- */
- OptionDescriptors EMPTY = new OptionDescriptors() {
-
- public Iterator<OptionDescriptor> iterator() {
- return Collections.<OptionDescriptor> emptyList().iterator();
- }
-
- public OptionDescriptor get(String key) {
- return null;
- }
- };
-
- /**
- * Gets the {@link OptionDescriptor} matching a given option name or {@code null} if this option
- * descriptor set does not contain a matching option name.
- *
- * @since 1.0
- */
- OptionDescriptor get(String optionName);
-
- /**
- * Creates a union options descriptor out of multiple given descriptors. The operation
- * descriptors are not checked for duplicate keys. The option descriptors are iterated in
- * declaration order.
- *
- * @since 1.0
- */
- static OptionDescriptors createUnion(OptionDescriptors... descriptors) {
- if (descriptors.length == 0) {
- return EMPTY;
- } else if (descriptors.length == 1) {
- return descriptors[0];
- } else {
- return new UnionOptionDescriptors(descriptors);
- }
- }
-
- /**
- * {@inheritDoc}
- *
- * @since 1.0
- */
- @Override
- Iterator<OptionDescriptor> iterator();
-
- /**
- * Creates an {@link OptionDescriptors} instance from a list. The option descriptors
- * implementation is backed by a {@link LinkedHashMap} that preserves ordering.
- *
- * @since 1.0
- */
- static OptionDescriptors create(List<OptionDescriptor> descriptors) {
- if (descriptors == null || descriptors.isEmpty()) {
- return EMPTY;
- }
- return new OptionDescriptorsMap(descriptors);
- }
-}
-
-class OptionDescriptorsMap implements OptionDescriptors {
-
- final Map<String, OptionDescriptor> descriptors = new LinkedHashMap<>();
-
- OptionDescriptorsMap(List<OptionDescriptor> descriptorList) {
- for (OptionDescriptor descriptor : descriptorList) {
- descriptors.put(descriptor.getName(), descriptor);
- }
- }
-
- @Override
- public OptionDescriptor get(String optionName) {
- return descriptors.get(optionName);
- }
-
- @Override
- public Iterator<OptionDescriptor> iterator() {
- return descriptors.values().iterator();
- }
-
-}
-
-final class UnionOptionDescriptors implements OptionDescriptors {
-
- final OptionDescriptors[] descriptorsList;
-
- UnionOptionDescriptors(OptionDescriptors[] descriptors) {
- // defensive copy
- this.descriptorsList = Arrays.copyOf(descriptors, descriptors.length);
- }
-
- public Iterator<OptionDescriptor> iterator() {
- return new Iterator<OptionDescriptor>() {
-
- Iterator<OptionDescriptor> descriptors = descriptorsList[0].iterator();
- int descriptorsIndex = 0;
- OptionDescriptor next = null;
-
- public boolean hasNext() {
- return fetchNext() != null;
- }
-
- private OptionDescriptor fetchNext() {
- if (next != null) {
- return next;
- }
- if (descriptors.hasNext()) {
- next = descriptors.next();
- return next;
- } else if (descriptorsIndex < descriptorsList.length - 1) {
- descriptorsIndex++;
- descriptors = descriptorsList[descriptorsIndex].iterator();
- return fetchNext();
- } else {
- return null;
- }
- }
-
- public OptionDescriptor next() {
- OptionDescriptor fetchedNext = fetchNext();
- if (fetchedNext != null) {
- // consume next
- this.next = null;
- return fetchedNext;
- } else {
- throw new NoSuchElementException();
- }
- }
- };
- }
-
- public OptionDescriptor get(String value) {
- for (OptionDescriptors descriptors : descriptorsList) {
- OptionDescriptor descriptor = descriptors.get(value);
- if (descriptor != null) {
- return descriptor;
- }
- }
- return null;
- }
-
-}