45 lines
1.6 KiB
Kotlin
45 lines
1.6 KiB
Kotlin
package cash.z.ecc.android.sdk.internal
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import android.content.Context
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import android.content.ContextWrapper
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import java.io.File
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/**
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* A context class wrapper used for building our database classes. The advantage of this implementation
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* is that we can control actions run on this context class. This is supposed to be used only for
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* Android SDK level 27 and higher. The Room's underlying SQLite has a different implementation of
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* SQLiteOpenHelper#getDatabaseLocked() and possibly other methods for Android SDK level 26 and lower.
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* Which at the end call ContextImpl#openOrCreateDatabase(), instead of the overridden getDatabasePath(),
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* and thus is not suitable for this custom context wrapper class.
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*
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* @param context
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* @param parentDir The directory in which is the database file placed.
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* @return Wrapped context class.
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*/
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internal class NoBackupContextWrapper(
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context: Context,
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private val parentDir: File
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) : ContextWrapper(context.applicationContext) {
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/**
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* Overriding this function gives us ability to control the result database file location.
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*
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* @param name Database file name.
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* @return File located under no_backup/co.electricoin.zcash directory.
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*/
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override fun getDatabasePath(name: String): File {
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Twig.debug { "Database: $name in directory: ${parentDir.absolutePath}" }
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return File(parentDir, name)
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}
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override fun getApplicationContext(): Context {
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// Prevent breakout
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return this
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}
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override fun getBaseContext(): Context {
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// Prevent breakout
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return this
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}
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}
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