platform/remote-servers/impl/src/com/intellij/remoteServer/agent/impl/util/UrlCollector.java

package com.intellij.remoteServer.agent.impl.util;

import com.intellij.openapi.diagnostic.Logger;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * @author michael.golubev
 */
public class UrlCollector {

  private static final Logger LOG = Logger.getInstance("#" + UrlCollector.class.getName());

  private List<File> myFiles;

  public URL[] collect(Collection<File> libraries) {
    List<File> files = collectFiles(libraries);
    URL[] result = new URL[files.size()];
    for (int i = 0; i < files.size(); i++) {
      try {
        result[i] = files.get(i).toURI().toURL();
      }
      catch (MalformedURLException e) {
        LOG.error(e); // should never happen
      }
    }
    return result;
  }

  public List<File> collectFiles(Collection<File> libraries) {
    myFiles = new ArrayList<File>();
    for (File library : libraries) {
      if (library.exists()) {
        addFile(library);
        if (library.isDirectory()) {
          addLibraries(library);
        }
      }
    }
    return myFiles;
  }

  private void addLibraries(File dir) {
    for (File file : dir.listFiles()) {
      if (file.isDirectory()) {
        addLibraries(file);
      }
      else if (file.getName().endsWith(".jar")) {
        addFile(file);
      }
    }
  }

  private void addFile(File file) {
    LOG.debug("addFile: " + file.getAbsolutePath());
    myFiles.add(file);
  }
}