/**
* loadCache
*
* @throws IOException
*/
@SuppressWarnings("unused")
private void loadCache() {
Context pContext = mContext.get();
if (null == pContext) return;
// Get content.
String strContent = null;
FileInputStream pInputStream = null;
try {
pInputStream = pContext.openFileInput(CACHE_FILE);
byte aBytes[] = new byte[pInputStream.available()];
pInputStream.read(aBytes);
strContent = new String(aBytes);
// Parse the json object.
JSONObject pRoot = new JSONObject(strContent);
JSONArray aArray = pRoot.optJSONArray(JSON_TAG);
final int nLength = (null != aArray ? aArray.length() : 0);
for (int nIdx = 0; nIdx < nLength; nIdx++) {
JSONObject pObject = aArray.getJSONObject(nIdx);
MsgEntity pEntity = new MsgEntity();
pEntity.parse(pObject);
// Save to array.
this.append(pEntity);
}
} catch (FileNotFoundException aException) {
aException.printStackTrace();
strContent = null;
} catch (IOException aException) {
aException.printStackTrace();
strContent = null;
} catch (JSONException aException) {
aException.printStackTrace();
} finally {
if (null != pInputStream) {
try {
pInputStream.close();
} catch (IOException aException) {
aException.printStackTrace();
}
pInputStream = null;
}
}
}
/** saveCache Save cache to local storage. */
public void saveCache() {
if (!mUpdated) {
// Do nothing when records are not updated.
return;
}
final int nSize = (null != mCache ? mCache.size() : 0);
if (0 >= nSize) return;
// Save cache to local storage.
Context pContext = mContext.get();
if (null == pContext) return;
FileOutputStream pOutputStream = null;
try {
JSONObject pRoot = new JSONObject();
JSONArray aArray = new JSONArray();
pRoot.put(JSON_TAG, aArray);
// Save the content.
for (MsgEntity entity : mCache) {
aArray.put(entity.toJson());
}
pOutputStream = pContext.openFileOutput(CACHE_FILE, Context.MODE_PRIVATE);
pOutputStream.write(pRoot.toString().getBytes());
} catch (FileNotFoundException aException) {
aException.printStackTrace();
} catch (IOException aException) {
aException.printStackTrace();
} catch (JSONException aException) {
aException.printStackTrace();
} finally {
if (null != pOutputStream) {
try {
pOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
pOutputStream = null;
}
}
}