com.oracle.svm.configure.config.ResourceConfiguration Maven / Gradle / Ivy

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/*
 * Copyright (c) 2019, 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.  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.configure.config;

import java.io.IOException;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;

import com.oracle.svm.configure.json.JsonPrintable;
import com.oracle.svm.configure.json.JsonPrinter;
import com.oracle.svm.configure.json.JsonWriter;
import com.oracle.svm.core.configure.ResourcesRegistry;

public class ResourceConfiguration implements JsonPrintable {

    public static class ParserAdapter implements ResourcesRegistry {
        private final ResourceConfiguration configuration;

        public ParserAdapter(ResourceConfiguration configuration) {
            this.configuration = configuration;
        }

        @Override
        public void addResources(String pattern) {
            configuration.add(pattern);
        }

        @Override
        public void addResourceBundles(String name) {
        }
    }

    private final Map resources = new HashMap<>();

    public void add(String pattern) {
        resources.computeIfAbsent(pattern, Pattern::compile);
    }

    public boolean anyMatches(String s) {
        /*
         * Naive -- if the need arises, we could match in the order of most frequently matched
         * patterns, or somehow merge the patterns into a single big pattern.
         */
        for (Pattern pattern : resources.values()) {
            if (pattern.matcher(s).matches()) {
                return true;
            }
        }
        return false;
    }

    @Override
    public void printJson(JsonWriter writer) throws IOException {
        writer.append('{').indent().newline();
        writer.quote("resources").append(':');
        JsonPrinter.printCollection(writer, resources.keySet(), Comparator.naturalOrder(), (String p, JsonWriter w) -> w.append('{').quote("pattern").append(':').quote(p).append('}'));
        writer.unindent().newline().append('}').newline();
    }
}