westlinkin/cacheutilslibrary

A simple Android utils library to write any type of data into cache files and read them later.

cacheutilslibrary's Issues

Error when reading from cached HashMap

I'm getting a com.google.gson.internal.LinkedTreeMap cannot be cast to <CustomClass> error when reading a HashMap from cache.

Writing to file:

Map<String, Bus> buses = new HashMap<>();
//after adding data
CacheUtils.writeDataMapFile(CACHE_NAME, buses);

Reading from file:

buses = CacheUtils.readDataMapFile(CACHE_NAME);
Bus b = buses.get("Route 1"); //Error here

Data already written is cleared from cache with new write request

In the sample code, since we are saving the data in utf-8 format to a cache file in the device storage, every time a new write request is made, the existing written data is flushed out.

To solve this I appended the content of the file using the FileOutputStream(String path, boolean append) constructor like this :
IOUtils.write(fileContent, new FileOutputStream(pathForCacheEntry(fileName),true), ENCODING);

But with this approach the buildGson from JSON for MyClass and Map<String> data types do not work as the data is not in valid JSON format.