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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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package com.oracle.svm.hosted.option;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import org.graalvm.compiler.options.OptionDescriptor;
import org.graalvm.compiler.options.OptionKey;
import org.graalvm.nativeimage.hosted.Feature;
import org.graalvm.nativeimage.ImageSingletons;

import com.oracle.svm.core.annotate.AutomaticFeature;
import com.oracle.svm.core.option.HostedOptionKey;
import com.oracle.svm.core.option.RuntimeOptionParser;
import com.oracle.svm.core.util.VMError;

@AutomaticFeature
public class RuntimeOptionFeature implements Feature {

    private ConcurrentMap<OptionDescriptor, Boolean> reachableOptions = new ConcurrentHashMap<>();
    private RuntimeOptionParser runtimeOptionParser;

    @Override
    public void afterRegistration(AfterRegistrationAccess access) {
        runtimeOptionParser = new RuntimeOptionParser();
        ImageSingletons.add(RuntimeOptionParser.class, runtimeOptionParser);
    }

    @Override
    public void duringSetup(DuringSetupAccess config) {
        config.registerObjectReplacer(this::collectOptionKeys);
    }

    private Object collectOptionKeys(Object obj) {
        if (obj instanceof OptionKey) {
            OptionKey<?> optionKey = (OptionKey<?>) obj;
            if (!(optionKey instanceof HostedOptionKey)) {
                OptionDescriptor optionDescriptor = optionKey.getDescriptor();
                if (optionDescriptor == null) {
                    throw VMError.shouldNotReachHere("No OptionDescriptor registered for an OptionKey. Often that is the result of an incomplete build. " +
                                    "The registration code is generated by an annotation processor at build time, so a clean and full rebuild often helps to solve this problem");
                }
                reachableOptions.put(optionDescriptor, true);
            }
        }
        return obj;
    }

    @Override
    public void duringAnalysis(DuringAnalysisAccess config) {
        if (runtimeOptionParser.updateRuntimeOptions(reachableOptions.keySet())) {
            config.requireAnalysisIteration();
        }
    }
}