com.github.DataLoader.java Source code

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Here is the source code for com.github.DataLoader.java

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/**
 * Copyright 2009 Kevin J. Menard Jr.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;

import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import java.util.HashSet;
import java.io.File;
import java.io.IOException;

public class DataLoader {
    public static Map<String, Repository> loadRepositories() throws IOException {
        final Map<String, Repository> repositories = new HashMap<String, Repository>();
        final Map<String, String> relationships = new HashMap<String, String>();

        // First, discover all the repositories.
        for (final Object o : IOUtils
                .readLines(DataLoader.class.getClassLoader().getResourceAsStream("data/repos.txt"))) {
            final String line = (String) o;

            final String[] mainParts = line.trim().split(":");
            final String repo_id = mainParts[0];

            final String[] repo_data = mainParts[1].split(",");
            final String created_at = repo_data[1];
            final String parent_id = repo_data.length == 3 ? repo_data[2] : null;

            final String[] fullName = repo_data[0].split("/");
            final String owner = fullName[0];
            final String name = fullName[1];

            repositories.put(repo_id, new Repository(repo_id, owner, name, created_at));

            if (parent_id != null) {
                relationships.put(repo_id, parent_id);
            }
        }

        // Now that all the repositories have been loaded, establish any parent-child relationships.
        for (final Map.Entry<String, String> pair : relationships.entrySet()) {
            repositories.get(pair.getKey()).setParent(repositories.get(pair.getValue()));
        }

        final Map<String, Watcher> watchers = new HashMap<String, Watcher>();
        for (final Object o : IOUtils
                .readLines(DataLoader.class.getClassLoader().getResourceAsStream("data/data.txt"))) {
            final String line = (String) o;

            final String[] mainParts = line.trim().split(":");
            final String user_id = mainParts[0];
            final String repo_id = mainParts[1];

            final Watcher watcher = watchers.get(user_id) == null ? new Watcher(user_id) : watchers.get(user_id);
            repositories.get(repo_id).associate(watcher);
        }

        return repositories;
    }

    public static DataSet loadWatchings() throws IOException {
        final DataSet ret = new DataSet();

        for (final Object o : IOUtils
                .readLines(DataLoader.class.getClassLoader().getResourceAsStream("data/data.txt"))) {
            final String line = (String) o;

            final String[] mainParts = line.trim().split(":");
            final String user_id = mainParts[0];
            final String repo_id = mainParts[1];

            ret.add(new Watching(user_id, repo_id));
        }

        return ret;
    }

    public static Set<Watcher> loadPredictings() throws IOException {
        final Set<Watcher> ret = new HashSet<Watcher>();

        for (final Object o : IOUtils
                .readLines(DataLoader.class.getClassLoader().getResourceAsStream("data/test.txt"))) {
            final String line = (String) o;

            ret.add(new Watcher(line.trim()));
        }

        return ret;
    }
}