/*
 * Copyright (c) 2008-2019 Emmanuel Dupuy.
 * This project is distributed under the GPLv3 license.
 * This is a Copyleft license that gives the user the right to use,
 * copy and modify the code freely for non-commercial purposes.
 */

package org.jd.gui.service.indexer;

import org.jd.gui.api.API;
import org.jd.gui.api.model.Container;
import org.jd.gui.api.model.Indexes;
import org.jd.gui.util.exception.ExceptionUtil;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collection;
import java.util.Map;
import java.util.regex.Pattern;

public class MetainfServiceFileIndexerProvider extends AbstractIndexerProvider {

    @Override public String[] getSelectors() { return appendSelectors("*:file:*"); }

    @Override public Pattern getPathPattern() { return (externalPathPattern != null) ? externalPathPattern : Pattern.compile("META-INF\\/services\\/[^\\/]+"); }

    @Override
    @SuppressWarnings("unchecked")
    public void index(API api, Container.Entry entry, Indexes indexes) {
        Map<String, Collection> index = indexes.getIndex("typeReferences");

        try (BufferedReader br = new BufferedReader(new InputStreamReader(entry.getInputStream()))) {
            String line;

            while ((line = br.readLine()) != null) {
                String trim = line.trim();

                if (!trim.isEmpty() && (trim.charAt(0) != '#')) {
                    String internalTypeName = trim.replace(".", "/");

                    index.get(internalTypeName).add(entry);
                }
            }
        } catch (IOException e) {
            assert ExceptionUtil.printStackTrace(e);
        }
    }
}