import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;

import android.content.Context;

import com.AllErrorsJSON;
import com.ErrorJSON;

public class CacheControllerImpl implements CacheController{

        private Context context;
        private final String CACHED_ERRORS_FILE_NAME = "cachedErrors.dat";
        
        public CacheControllerImpl(Context context) {
                this.context = context;
        }

        @Override
        public boolean putErrorsToCache(AllErrorsJSON allErrorsJSON) {
                
                File cacheDir = context.getCacheDir();
                File cachedDataFile = new File(cacheDir.getPath() + "/" + CACHED_ERRORS_FILE_NAME) ;
                FileOutputStream   fos  = null;
        ObjectOutputStream oos  = null;
        boolean            keep = true;

        try {
            fos = new FileOutputStream(cachedDataFile);
            fos.write((new String()).getBytes());
            oos = new ObjectOutputStream(fos);
            oos.writeObject(allErrorsJSON);
        } catch (Exception e) {
            keep = false;
        } finally {
            try {
                if (oos != null)   oos.close();
                if (fos != null)   fos.close();
                if (keep == false) cachedDataFile.delete();
        } catch (Exception e) 
        { /* do nothing */ }
        }

        return keep;

        }

        @Override
        public AllErrorsJSON getErrorsFromCache() {
                AllErrorsJSON allErrorsJSON= null;
        FileInputStream fis = null;
        ObjectInputStream ois = null;

        File cacheDir = context.getCacheDir();
                File cachedDataFile = new File(cacheDir.getPath() + "/" + CACHED_ERRORS_FILE_NAME) ;
        try {
            fis = new FileInputStream(cachedDataFile);
            ois = new ObjectInputStream(fis);
            allErrorsJSON = (AllErrorsJSON) ois.readObject();
        } catch(Exception e) {
            
        } finally {
            try {
                if (fis != null)   fis.close();
                if (ois != null)   ois.close();
            } catch (Exception e) { }
        }

        return allErrorsJSON;  
        }