forked from External/mage
49 lines
1.9 KiB
Java
49 lines
1.9 KiB
Java
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package mage.server;
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import mage.server.util.PluginClassLoader;
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import mage.util.StreamUtils;
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import java.io.File;
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import java.io.IOException;
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import java.util.Scanner;
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/**
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* @author Lymia
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*/
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public final class ExtensionPackageLoader {
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public static ExtensionPackage loadExtension(File directory) throws IOException {
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if(!directory.exists ()) throw new RuntimeException("File not found "+directory);
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if(!directory.isDirectory()) throw new RuntimeException(directory+" is not a directory");
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File entryPointFile = new File(directory, "entryPoint");
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if(!entryPointFile.exists() || !entryPointFile.isFile())
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throw new RuntimeException("Entry point definition not found.");
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File packagesDirectory = new File(directory, "packages");
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if(!packagesDirectory.exists() || !packagesDirectory.isDirectory())
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throw new RuntimeException("Packages directory not found.");
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Scanner entryPointReader = new Scanner(entryPointFile);
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String entryPoint = entryPointReader.nextLine().trim();
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entryPointReader.close();
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PluginClassLoader classLoader = null;
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try {
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classLoader = new PluginClassLoader();
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for(File f : packagesDirectory.listFiles()) {
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classLoader.addURL(f.toURI().toURL());
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}
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return (ExtensionPackage) Class.forName(entryPoint, false, classLoader).newInstance();
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} catch (InstantiationException | IllegalAccessException e) {
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throw new RuntimeException(e);
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} catch (ClassNotFoundException e) {
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throw new RuntimeException("Entry point class not found!", e);
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} catch (ClassCastException e) {
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throw new RuntimeException("Entry point not an instance of ExtensionPackage.", e);
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} finally {
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StreamUtils.closeQuietly(classLoader);
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}
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}
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}
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