BrowseElement.java :  » Graphics-3D-2D-OpenGL » modelview-android » org » jtb » modelview » Android Open Source

package org.jtb.modelview;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import android.content.Context;
import android.os.Handler;

abstract class BrowseElement implements Serializable, Comparable<BrowseElement> {
  private static final long serialVersionUID = 1L;

  @SuppressWarnings("serial")
  private static final Set<String> VALID_EXTENSIONS = new HashSet<String>() {
    {
      add(".off");
      add(".obj");
    }
  };

  protected transient Context context;
  protected String path;

  BrowseElement(Context context, String path) {
    this.context = context;
    this.path = path;
  }

  protected static boolean isUnderstood(String path) {
    for (String ext : VALID_EXTENSIONS) {
      if (path.endsWith(ext)) {
        return true;
      }
    }
    return false;
  }

  String getPath() {
    return path;
  }

  protected abstract InputStream getInputStream() throws IOException;

  Mesh getMesh() throws ModelLoadException {
    try {
      if (getPath().endsWith(".off")) {
        return new OffReader(context).readMesh(getInputStream());
      }
      if (getPath().endsWith(".obj")) {
        return new ObjReader(context).readMesh(getInputStream());
      }
      throw new ModelLoadException();
    } catch (IOException ioe) {
      ModelLoadException mle = new ModelLoadException(ioe);
      mle.setPath(toPathString());
      throw mle;
    } catch (ModelLoadException mle) {
      mle.setPath(toPathString());
      throw mle;
    }
  }

  abstract long getSize() throws IOException;

  abstract List<BrowseElement> getChildren() throws IOException;

  abstract boolean isDirectory();

  String toPathString() {
    int i = getPath().indexOf("modelview-data");
    return getPath().substring(i + "modelview-data".length(),
        getPath().length());
  }

  @Override
  public String toString() {
    return new File(path).getName();
  }

  void setContext(Context context) {
    this.context = context;
  }

  public int compareTo(BrowseElement other) {
    return toString().compareTo(other.toString());
  }
}