/*
 * Copyright (c) 2016, 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
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package com.oracle.svm.core.util;

import java.util.ArrayList;
import java.util.List;

import com.oracle.svm.core.feature.AutomaticallyRegisteredFeature;
import org.graalvm.nativeimage.ImageSingletons;

import com.oracle.svm.core.feature.InternalFeature;
import com.oracle.svm.core.util.Counter.Group;

@AutomaticallyRegisteredFeature
public class CounterFeature implements InternalFeature {

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

    @Override
    public void beforeAnalysis(BeforeAnalysisAccess access) {
        CounterGroupList counterGroupList = ImageSingletons.lookup(CounterGroupList.class);
        List<Group> candidateGroups = counterGroupList.getGroups();
        List<Group> enabledGroups = new ArrayList<>(candidateGroups.size());
        for (Group group : candidateGroups) {
            /*
             * Set the actual enabled value, the value is constant folded during image generation.
             */
            group.enabled = group.enabledOption.getValue();
            if (group.enabled) {
                enabledGroups.add(group);
            }
        }
        enabledGroups.sort((g1, g2) -> g1.name.compareTo(g2.name));
        ImageSingletons.add(CounterSupport.class, new CounterSupport(enabledGroups.toArray(new Group[enabledGroups.size()])));
    }
}
