fileforestclassloadermanager.java

树形的java classloader,树形的java classloader,树形的java classloader,

package org.codehaus.classloader;

import java.io.File;
import java.io.FileFilter;
import java.net.URL;
import java.util.Iterator;
/**
 * This class loader manager loads class from a list of directories/files using a hierarchical rule. i.e.
 * classes under the same folder take precedence over those in parent or sibling directories.
 * <p>
 * This is ideal for managing jar files that have dependencies on different version of the same library.
 * <p>
 * @author Ben Yu
 * Aug 2, 2006 7:00:51 PM
 */
public class FileForestClassLoaderManager extends
    AbstractTreeClassLoaderManager {
  private final URL[] base;
  private final File[] files;
  private final ClassLoader parent;
  private final FileFilter filter;
  private final FilesIterable iterable = new FilesIterable();
  public FileForestClassLoaderManager(URL[] base, File[] files, FileFilter filter) {
    this(ClassLoader.getSystemClassLoader(), base, files, filter);
  }
  public FileForestClassLoaderManager(URL[] base, File[] files) {
    this(ClassLoader.getSystemClassLoader(), base, files);
  } 
  public FileForestClassLoaderManager(ClassLoader parent, URL[] base, File[] files, FileFilter filter) {
    this(NilClassLoaderManager.instance(), parent, base, files, filter);
  }
  public FileForestClassLoaderManager(ClassLoader parent, URL[] base, File[] files) {
    this(parent, base, files, MayBeClassSource.defaultInstance());
  } 
  protected FileForestClassLoaderManager(ClassLoaderManager up, ClassLoader parent, 
      URL[] base, File[] files, FileFilter filter) {
    super(up);
    this.parent = parent;
    this.base = base;
    this.files = files;
    this.filter = filter;
  }
  protected Iterator children() {
    return iterable.iterateFiles(this, parent, base, files, filter);
  }

}