forked from External/mage
70 lines
3.3 KiB
Java
70 lines
3.3 KiB
Java
/*
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* Copyright 2016 Lymia <lymia@lymiahugs.com>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are those of the
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* authors and should not be interpreted as representing official policies, either expressed
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* or implied, of BetaSteward_at_googlemail.com.
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*/
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package mage.server;
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import mage.server.util.PluginClassLoader;
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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 = new PluginClassLoader();
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for(File f : packagesDirectory.listFiles()) classLoader.addURL(f.toURI().toURL());
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try {
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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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}
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}
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}
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