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Code Issues Releases Wiki Activity

Move ClassFinder to the fx module, which is the only place it's used.

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Danila Fedorin
2017-09-24 00:01:43 -07:00
parent 40362a7afe
commit e82a13cde5
2 changed files with 1 additions and 2 deletions
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1
fx/src/main/java/org/nwapw/abacus/fx/AbacusController.java
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@@ -16,7 +16,6 @@ import org.nwapw.abacus.exception.AbacusException;
import org.nwapw.abacus.function.Documentation;
import org.nwapw.abacus.function.DocumentationType;
import org.nwapw.abacus.number.*;
import org.nwapw.abacus.plugin.ClassFinder;
import org.nwapw.abacus.plugin.PluginListener;
import org.nwapw.abacus.plugin.PluginManager;
import org.nwapw.abacus.plugin.standard.StandardPlugin;

80
fx/src/main/java/org/nwapw/abacus/fx/ClassFinder.java Normal file
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@@ -0,0 +1,80 @@
package org.nwapw.abacus.fx;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.stream.Collectors;
/**
* Class that loads plugin classes from their jars.
*/
public class ClassFinder {
/**
* Loads all the plugin classes from the given plugin folder.
*
* @param filePath the path for the plugin folder.
* @return the list of all loaded classes.
* @throws IOException thrown if an error occurred scanning the plugin folder.
* @throws ClassNotFoundException thrown if the class listed in the file doesn't get loaded.
*/
public static List<Class<?>> loadJars(String filePath) throws IOException, ClassNotFoundException {
return loadJars(new File(filePath));
}
/**
* Loads all the plugin classes from the given plugin folder.
*
* @param pluginFolderPath the folder in which to look for plugins.
* @return the list of all loaded classes.
* @throws IOException thrown if an error occurred scanning the plugin folder.
* @throws ClassNotFoundException thrown if the class listed in the file doesn't get loaded.
*/
public static List<Class<?>> loadJars(File pluginFolderPath) throws IOException, ClassNotFoundException {
ArrayList<Class<?>> toReturn = new ArrayList<>();
if (!pluginFolderPath.exists()) return toReturn;
ArrayList<File> files = Files.walk(pluginFolderPath.toPath())
.map(Path::toFile)
.filter(f -> f.getName().endsWith(".jar"))
.collect(Collectors.toCollection(ArrayList::new));
for (File file : files) {
toReturn.addAll(loadJar(file));
}
return toReturn;
}
/**
* Loads the classes from a single path, given by the file.
*
* @param jarLocation the location of the jar to load.
* @return the list of loaded classes loaded from the jar.
* @throws IOException thrown if there was an error reading the file
* @throws ClassNotFoundException thrown if the class could not be loaded.
*/
public static List<Class<?>> loadJar(File jarLocation) throws IOException, ClassNotFoundException {
ArrayList<Class<?>> loadedClasses = new ArrayList<>();
String path = jarLocation.getPath();
URL[] urls = new URL[]{new URL("jar:file:" + path + "!/")};
URLClassLoader classLoader = URLClassLoader.newInstance(urls);
JarFile jarFolder = new JarFile(jarLocation);
Enumeration jarEntityList = jarFolder.entries();
while (jarEntityList.hasMoreElements()) {
JarEntry jarEntity = (JarEntry) jarEntityList.nextElement();
if (jarEntity.getName().endsWith(".class")) {
loadedClasses.add(classLoader.loadClass(jarEntity.getName().replace('/', '.').substring(0, jarEntity.getName().length() - 6)));
}
}
return loadedClasses;
}
}