aurelienribon.gdxsetupui.LibraryManager.java Source code

Introduction

Here is the source code for aurelienribon.gdxsetupui.LibraryManager.java

Source

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 aurelienribon.gdxsetupui;

import aurelienribon.utils.HttpUtils;
import aurelienribon.utils.HttpUtils.DownloadListener;
import aurelienribon.utils.HttpUtils.DownloadTask;
import aurelienribon.utils.ParseUtils;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.io.FileUtils;

/**
 * The library manager job is to retrieve the master configuration file,
 * and to download each library definition file. It maintains a collection of
 * definition files and urls.
 *
 * @author Aurelien Ribon | http://www.aurelienribon.com/
 */
public class LibraryManager {
    private final String configUrl;
    private final List<String> libraries = new ArrayList<String>();
    private final Map<String, String> librariesUrls = new HashMap<String, String>();
    private final Map<String, LibraryDef> librariesDefs = new HashMap<String, LibraryDef>();

    public LibraryManager(String configUrl) {
        this.configUrl = configUrl;
    }

    // -------------------------------------------------------------------------
    // Public API
    // -------------------------------------------------------------------------

    /**
     * Asynchronously downloads the master config file and parses it to build
     * the list of available libraries.
     */
    public DownloadTask downloadConfigFile() {
        final ByteArrayOutputStream output = new ByteArrayOutputStream();
        DownloadTask task = HttpUtils.downloadAsync(configUrl, output, "Master config file");

        task.addListener(new DownloadListener() {
            @Override
            public void onComplete() {
                parseLibraries(output.toString());
            }
        });

        return task;
    }

    /**
     * Asynchronously downloads the library definition file corresponding
     * to the given name.
     */
    public DownloadTask downloadDef(final String name) {
        if (!librariesUrls.containsKey(name))
            return null;

        final ByteArrayOutputStream output = new ByteArrayOutputStream();
        DownloadTask task = HttpUtils.downloadAsync(librariesUrls.get(name), output, "Def '" + name + "'");

        task.addListener(new DownloadListener() {
            @Override
            public void onComplete() {
                registerLibraryDef(name, output);
            }
        });

        return task;
    }

    /**
     * Manually adds a library definition file url. Used mostly for testing
     * a library.
     */
    public void addUrl(String name, String url) {
        if (!libraries.contains(name))
            libraries.add(name);
        librariesUrls.put(name, url);
    }

    /**
     * Manually adds a library definition file. Used mostly for testing a
     * library.
     */
    public void addDef(String name, LibraryDef def) {
        if (!libraries.contains(name))
            libraries.add(name);
        librariesDefs.put(name, def);
    }

    /**
     * Deletes every incomplete downloaded file (all the ".zip.tmp").
     */
    public void cleanUpDownloads() {
        for (File file : new File(".").listFiles()) {
            if (file.isFile() && file.getName().endsWith(".zip.tmp")) {
                FileUtils.deleteQuietly(file);
            }
        }
    }

    public String getConfigUrl() {
        return configUrl;
    }

    public List<String> getNames() {
        return Collections.unmodifiableList(libraries);
    }

    public String getUrl(String name) {
        return librariesUrls.get(name);
    }

    public LibraryDef getDef(String name) {
        return librariesDefs.get(name);
    }

    // -------------------------------------------------------------------------
    // Helpers
    // -------------------------------------------------------------------------

    private void parseLibraries(String str) {
        List<String> lines = ParseUtils.parseBlockAsList(str, "libraries");

        for (String line : lines) {
            String[] parts = line.split("=", 2);
            if (parts.length != 2)
                continue;

            String name = parts[0].trim();
            if (!libraries.contains(name))
                libraries.add(name);
            librariesUrls.put(name, parts[1].trim());
        }
    }

    private synchronized void registerLibraryDef(String name, ByteArrayOutputStream output) {
        librariesDefs.put(name, new LibraryDef(output.toString()));
    }
}