Android Open Source - playnomics-android Cache File

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License

The source code is released under:

Apache License

Java Source Code

package com.playnomics.android.util;
/* w  w w. ja  va  2s .  c  o  m*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Set;

import android.content.Context;

public class CacheFile {
  
  public interface ICacheFileHandler{
    void onReadSetComplete(Set<String> data);
  }
  
  
  private Util util;
  private Context context;
  private String fileName;
  
  public void setContext(Context context){
    this.context = context;
  }
  
  public CacheFile(Util util, IConfig config){
    this.util = util;
    this.fileName = config.getCacheFileName();
  }
  
  @SuppressWarnings("unchecked")
  public Runnable readSetFromFile(final ICacheFileHandler handler){
    return new Runnable() {
      public void run() {
        File file = util.getContextCacheFile(context, fileName);

        Set<String> set = null;
        FileInputStream fileStream = null;
        ObjectInputStream objectStream = null;

        try {

          fileStream = new FileInputStream(file);
          objectStream = new ObjectInputStream(fileStream);
          
          Object object =  objectStream.readObject();
          set = (Set<String>) object;
        } catch (Exception e) {
        } finally {
          try {
            if (fileStream != null)
              fileStream.close();
            if (objectStream != null)
              objectStream.close();
          } catch (Exception e) {
          }
        }

        handler.onReadSetComplete(set);
      }
    };
  }

  public Runnable writeSetToFile(final Set<String> set){
    return new Runnable() {
      public void run() {
        File file = util.getContextCacheFile(context, fileName);
        
        FileOutputStream fileStream = null;
        ObjectOutputStream objectStream = null;
        boolean writeSuccessful = false;
    
        try {
          fileStream = new FileOutputStream(file);
          objectStream = new ObjectOutputStream(fileStream);
          objectStream.writeObject(set);
          writeSuccessful = true;
        } catch (Exception e) {
          
        } finally {
          try {
            if (objectStream != null)
              objectStream.close();
            if (fileStream != null)
              fileStream.close();
            if (!writeSuccessful)
              file.delete();
          } catch (Exception e) {
            /* do nothing */
          }
        }
      }
    };
  }
  
}

Java Source Code List

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