MockNotesDataSource.kt

package com.shellmonger.apps.mynotes.repositories.datasources

import android.arch.paging.DataSource
import android.arch.paging.ItemKeyedDataSource
import android.util.Log
import com.shellmonger.apps.mynotes.models.Note

class MockNotesDataSource : ItemKeyedDataSource<Int, Note>() {
    companion object {
        private val TAG = this::class.java.simpleName

        const val MAX_PAGE_SIZE = 20
    }

    /**
     * The list of items in the data source
     */
    private val items: MutableList<Note> = ArrayList()

    init {
        // Create some fake data
        for (i in 0..200) {
            items.add(Note().apply { title = "title $i"; content = "content $i" })
        }
    }

    fun inRange(position: Int, start: Int, end: Int): Int {
        if (position < start) return start
        if (position > end) return end
        return position
    }

  // Other methods here
}