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Initial commit of multiasset branch

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7u83
2018-11-30 12:27:41 +01:00
parent 45684a9d0e
commit bb18f7cf03
205 changed files with 8656 additions and 2750 deletions
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src/opensesim/sesim/SeSimClassLoader.java Normal file
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/*
* Copyright (c) 2017, 7u83 <7u83@mail.ru>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package opensesim.sesim;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Modifier;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import java.util.logging.Level;
/**
*
* @author 7u83 <7u83@mail.ru>
* @param <T>
*/
public class SeSimClassLoader<T> {
protected ArrayList<String> default_pathlist;
private ArrayList<Class<T>> cache;
final Class<T> class_type;
/**
* Create a SeSimClassLoader object with an empty default path
*
* @param class_type
*/
public SeSimClassLoader(Class<T> class_type) {
this(class_type, new ArrayList<>());
}
/**
* Create a SeSimClassLoader object with given default path
*
* @param class_type
* @param pathlist Default path to search classes for
*/
public SeSimClassLoader(Class<T> class_type, ArrayList<String> pathlist) {
this.class_type = class_type;
setDefaultPathList(pathlist);
}
/**
* Set the path list where to search for classes
*
* @param pathlist List of paths
*/
public final void setDefaultPathList(ArrayList<String> pathlist) {
this.default_pathlist = pathlist;
}
/**
* Get a list of all files in a given directory and its sub-directories.
*
* @param path Directory to list
* @return List of files
*/
public ArrayList<File> listFiles(String path) {
ArrayList<File> files = new ArrayList<>();
File fp = new File(path);
if (!fp.isDirectory()) {
files.add(fp);
return files;
}
File[] fList = new File(path).listFiles();
for (File file : fList) {
if (file.isFile()) {
files.add(file);
} else if (file.isDirectory()) {
files.addAll(listFiles(file.getAbsolutePath()));
}
}
return files;
}
/**
* Create a new instance of specified class
*
* @param cls Class to create an instance of
* @return the instance, null if not successful
*/
public Object newInstance(Class<?> cls) {
try {
return cls.newInstance();
} catch (InstantiationException | IllegalAccessException ex) {
return null;
}
}
/**
* Check if a given class provides a certain interface and also if the class
* is not abstract, so it could be instantiated.
*
* @param cls Class to check
* @param iface Interface which the class should provide
* @return true if it is an instance of insclass, otherwise false
*/
public boolean hasInterface(Class<?> cls, Class<?> iface) {
if (Modifier.isAbstract(cls.getModifiers())) {
return false;
}
do {
for (Class<?> i : cls.getInterfaces()) {
if (i == iface) {
return true;
}
}
} while ((cls = cls.getSuperclass()) != null);
return false;
}
private Class<T> loadClass(String directory, String class_name) {
if (class_name == null) {
return null;
}
URL url;
try {
url = new File(directory).toURI().toURL();
} catch (MalformedURLException ex) {
return null;
}
URL[] urls = new URL[]{url};
ClassLoader cl;
cl = new URLClassLoader(urls);
try {
Class<?> cls;
cls = cl.loadClass(class_name);
if (cls == null) {
return null;
}
if (class_type != null) {
if (!hasInterface(cls, class_type)) {
return null;
}
}
/* if (newInstance(cls) == null) {
return null;
}
*/
return (Class<T>) cls;
} catch (ClassNotFoundException ex) {
return null;
} catch (NoClassDefFoundError ex){
return null;
}
}
/**
*
* @param pathlist
* @return
*/
public ArrayList<Class<T>> getInstalledClasses0(ArrayList<String> pathlist) {
ArrayList<Class<T>> result = new ArrayList<>();
for (String path : pathlist) {
ArrayList<File> files = listFiles(path);
for (File file : files) {
String fn = file.toString();
if (fn.toLowerCase().endsWith(".class")) {
String class_name;
class_name = fn.substring(path.length());
// in case we are under Windows, replace \ width /
class_name = class_name.replace("\\", "/");
class_name = class_name.substring(1, class_name.length() - 6).replace('/', '.');
Class<T> c = loadClass(path, class_name);
if (null == c) {
continue;
}
result.add(c);
}
if (fn.toLowerCase().endsWith(".jar")) {
JarInputStream jarstream = null;
try {
File jarfile = new File(fn);
jarstream = new JarInputStream(new FileInputStream(jarfile));
JarEntry jarentry;
while ((jarentry = jarstream.getNextJarEntry()) != null) {
String class_name = jarentry.getName();
if (class_name.endsWith(".class")) {
class_name = class_name.substring(0, class_name.length() - 6).replace('/', '.');
Class<T> c = loadClass(path, class_name);
if (null == c) {
continue;
}
result.add(c);
}
}
} catch (IOException ex) {
} finally {
try {
if (jarstream != null) {
jarstream.close();
}
} catch (IOException ex) {
// java.util.logging.Logger.getLogger(AutoTraderLoader.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
}
return result;
}
/**
* Get a list of all traders found in class path
*
* @param additional_pathlist
* @return List of installed Classes
*/
public ArrayList<Class<T>> getInstalledClasses(ArrayList<String> additional_pathlist ) {
if (cache != null) {
return cache;
}
ArrayList<String> pathlist;
pathlist = new ArrayList<>();
pathlist.addAll(default_pathlist);
pathlist.addAll(additional_pathlist);
cache = getInstalledClasses0(pathlist);
return cache;
}
public ArrayList<Class<T>> getInstalledClasses(){
return getInstalledClasses(new ArrayList<>());
}
}