Android Open Source - anode Module Class Loader

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License

The source code is released under:

Apache License

Java Source Code

package org.meshpoint.anode.bridge;
// w w w. j  a v a2s. c  om
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import dalvik.system.DexClassLoader;

public class ModuleClassLoader extends ClassLoader {
  private static String packageName = "org.webinos.modules";

  private ClassLoader defaultClassLoader;
  private DexClassLoader internalClassLoader;

  public ModuleClassLoader(Object envContext) {
    if (!(envContext instanceof Context)) {
      throw new IllegalArgumentException();
    }
    Context androidContext = (Context) envContext;
    defaultClassLoader = androidContext.getClassLoader();
    PackageManager pkgMgr = androidContext.getPackageManager();

    if (pkgMgr != null
        && pkgMgr.checkSignatures(androidContext.getPackageName(), packageName) >= 0) {
      String dexPath = null;
      try {
        dexPath = pkgMgr.getApplicationInfo(packageName, 0).sourceDir;
      } catch (NameNotFoundException e) {}
      if (dexPath != null) {
        String dexOutputDir = androidContext.getDir("dex", 0).getAbsolutePath();
        internalClassLoader = new DexClassLoader(dexPath, dexOutputDir, null,
            androidContext.getClassLoader());
      }
    }
  }

  @Override
  public Class<?> findClass(String className)  throws ClassNotFoundException {
    Class<?> clazz;
    try {
      if((clazz = defaultClassLoader.loadClass(className)) != null)
        return clazz;
    } catch(ClassNotFoundException cnfe) {}

    if (internalClassLoader != null && (clazz = internalClassLoader.loadClass(className)) != null)
      return clazz;

    throw new ClassNotFoundException(className);
  }
}

Java Source Code List

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