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tuancoltechtuancoltech
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Convert WordContentProvider to Kotlin
1 parent fa3fb3e commit 1a25cf2

1 file changed

Lines changed: 101 additions & 102 deletions

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‎app/src/main/java/ai/elimu/content_provider/provider/WordContentProvider.kt‎

Lines changed: 101 additions & 102 deletions
Original file line numberDiff line numberDiff line change
@@ -1,158 +1,157 @@
1-
package ai.elimu.content_provider.provider;
1+
package ai.elimu.content_provider.provider
22

3-
import android.content.ContentProvider;
4-
import android.content.ContentValues;
5-
import android.content.Context;
6-
import android.content.UriMatcher;
7-
import android.database.Cursor;
8-
import android.net.Uri;
9-
import android.util.Log;
3+
import ai.elimu.content_provider.BuildConfig
4+
import ai.elimu.content_provider.room.db.RoomDb
5+
import android.content.ContentProvider
6+
import android.content.ContentValues
7+
import android.content.UriMatcher
8+
import android.database.Cursor
9+
import android.net.Uri
10+
import android.util.Log
1011

11-
import java.util.List;
12+
class WordContentProvider : ContentProvider() {
13+
override fun onCreate(): Boolean {
14+
Log.i(javaClass.name, "onCreate")
1215

13-
import ai.elimu.content_provider.BuildConfig;
14-
import ai.elimu.content_provider.room.dao.WordDao;
15-
import ai.elimu.content_provider.room.db.RoomDb;
16+
Log.i(javaClass.name, "URI_WORD: " + URI_WORD)
1617

17-
public class WordContentProvider extends ContentProvider {
18-
19-
// The authority of this content provider
20-
public static final String AUTHORITY = BuildConfig.APPLICATION_ID + ".provider.word_provider";
21-
22-
private static final String TABLE_WORDS = "words";
23-
private static final int CODE_WORDS = 1;
24-
private static final int CODE_WORD_ID = 2;
25-
private static final int CODE_WORDS_BY_STORYBOOK_PARAGRAPH_ID = 3;
26-
public static final Uri URI_WORD = Uri.parse("content://" + AUTHORITY + "/" + TABLE_WORDS);
27-
28-
// The URI matcher
29-
private static final UriMatcher MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
30-
31-
static {
32-
MATCHER.addURI(AUTHORITY, TABLE_WORDS, CODE_WORDS);
33-
MATCHER.addURI(AUTHORITY, TABLE_WORDS + "/#", CODE_WORD_ID);
34-
MATCHER.addURI(AUTHORITY, TABLE_WORDS + "/by-paragraph-id/#", CODE_WORDS_BY_STORYBOOK_PARAGRAPH_ID);
35-
}
36-
37-
@Override
38-
public boolean onCreate() {
39-
Log.i(getClass().getName(), "onCreate");
40-
41-
Log.i(getClass().getName(), "URI_WORD: " + URI_WORD);
42-
43-
return true;
18+
return true
4419
}
4520

4621
/**
4722
* Handles query requests from clients.
4823
*/
49-
@Override
50-
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
51-
Log.i(getClass().getName(), "query");
52-
53-
Log.i(getClass().getName(), "uri: " + uri);
54-
Log.i(getClass().getName(), "projection: " + projection);
55-
Log.i(getClass().getName(), "selection: " + selection);
56-
Log.i(getClass().getName(), "selectionArgs: " + selectionArgs);
57-
Log.i(getClass().getName(), "sortOrder: " + sortOrder);
58-
59-
Context context = getContext();
60-
Log.i(getClass().getName(), "context: " + context);
24+
override fun query(
25+
uri: Uri,
26+
projection: Array<String>?,
27+
selection: String?,
28+
selectionArgs: Array<String>?,
29+
sortOrder: String?
30+
): Cursor? {
31+
Log.i(javaClass.name, "query")
32+
33+
Log.i(javaClass.name, "uri: $uri")
34+
Log.i(javaClass.name, "projection: $projection")
35+
Log.i(javaClass.name, "selection: $selection")
36+
Log.i(javaClass.name, "selectionArgs: $selectionArgs")
37+
Log.i(javaClass.name, "sortOrder: $sortOrder")
38+
39+
val context = context
40+
Log.i(javaClass.name, "context: $context")
6141
if (context == null) {
62-
return null;
42+
return null
6343
}
6444

65-
RoomDb roomDb = RoomDb.getDatabase(context);
66-
WordDao wordDao = roomDb.wordDao();
45+
val roomDb = RoomDb.getDatabase(context)
46+
val wordDao = roomDb.wordDao()
6747

68-
final int code = MATCHER.match(uri);
69-
Log.i(getClass().getName(), "code: " + code);
48+
val code = MATCHER.match(uri)
49+
Log.i(javaClass.name, "code: $code")
7050
if (code == CODE_WORDS) {
71-
final Cursor cursor;
72-
7351
// Get the Room Cursor
74-
cursor = wordDao.loadAllOrderedByUsageCountAsCursor();
75-
Log.i(getClass().getName(), "cursor: " + cursor);
52+
val cursor = wordDao.loadAllOrderedByUsageCountAsCursor()
53+
Log.i(javaClass.name, "cursor: $cursor")
7654

77-
cursor.setNotificationUri(context.getContentResolver(), uri);
55+
cursor.setNotificationUri(context.contentResolver, uri)
7856

79-
return cursor;
57+
return cursor
8058
} else if (code == CODE_WORDS_BY_STORYBOOK_PARAGRAPH_ID) {
8159
// Extract the StoryBookParagraph ID from the URI
82-
List<String> pathSegments = uri.getPathSegments();
83-
Log.i(getClass().getName(), "pathSegments: " + pathSegments);
84-
String storyBookParagraphIdAsString = pathSegments.get(2);
85-
Long storyBookParagraphId = Long.valueOf(storyBookParagraphIdAsString);
86-
Log.i(getClass().getName(), "storyBookParagraphId: " + storyBookParagraphId);
87-
88-
final Cursor cursor;
60+
val pathSegments = uri.pathSegments
61+
Log.i(javaClass.name, "pathSegments: $pathSegments")
62+
val storyBookParagraphIdAsString = pathSegments[2]
63+
val storyBookParagraphId = storyBookParagraphIdAsString.toLong()
64+
Log.i(javaClass.name, "storyBookParagraphId: $storyBookParagraphId")
8965

9066
// Get the Room Cursor
91-
cursor = wordDao.loadAllAsCursor(storyBookParagraphId);
92-
Log.i(getClass().getName(), "cursor: " + cursor);
67+
val cursor = wordDao.loadAllAsCursor(storyBookParagraphId)
68+
Log.i(javaClass.name, "cursor: $cursor")
9369

94-
cursor.setNotificationUri(context.getContentResolver(), uri);
70+
cursor.setNotificationUri(context.contentResolver, uri)
9571

96-
return cursor;
72+
return cursor
9773
} else if (code == CODE_WORD_ID) {
9874
// Extract the Word ID from the URI
99-
List<String> pathSegments = uri.getPathSegments();
100-
Log.i(getClass().getName(), "pathSegments: " + pathSegments);
101-
String wordIdAsString = pathSegments.get(1);
102-
Long wordId = Long.valueOf(wordIdAsString);
103-
Log.i(getClass().getName(), "wordId: " + wordId);
104-
105-
final Cursor cursor;
75+
val pathSegments = uri.pathSegments
76+
Log.i(javaClass.name, "pathSegments: $pathSegments")
77+
val wordIdAsString = pathSegments[1]
78+
val wordId = wordIdAsString.toLong()
79+
Log.i(javaClass.name, "wordId: $wordId")
10680

10781
// Get the Room Cursor
108-
cursor = wordDao.loadAsCursor(wordId);
109-
Log.i(getClass().getName(), "cursor: " + cursor);
82+
val cursor = wordDao.loadAsCursor(wordId)
83+
Log.i(javaClass.name, "cursor: $cursor")
11084

111-
cursor.setNotificationUri(context.getContentResolver(), uri);
85+
cursor.setNotificationUri(context.contentResolver, uri)
11286

113-
return cursor;
87+
return cursor
11488
} else {
115-
throw new IllegalArgumentException("Unknown URI: " + uri);
89+
throw IllegalArgumentException("Unknown URI: $uri")
11690
}
11791
}
11892

11993
/**
12094
* Handles requests for the MIME type of the data at the given URI.
12195
*/
122-
@Override
123-
public String getType(Uri uri) {
124-
Log.i(getClass().getName(), "getType");
96+
override fun getType(uri: Uri): String? {
97+
Log.i(javaClass.name, "getType")
12598

126-
throw new UnsupportedOperationException("Not yet implemented");
99+
throw UnsupportedOperationException("Not yet implemented")
127100
}
128101

129102
/**
130103
* Handles requests to insert a new row.
131104
*/
132-
@Override
133-
public Uri insert(Uri uri, ContentValues values) {
134-
Log.i(getClass().getName(), "insert");
105+
override fun insert(uri: Uri, values: ContentValues?): Uri? {
106+
Log.i(javaClass.name, "insert")
135107

136-
throw new UnsupportedOperationException("Not yet implemented");
108+
throw UnsupportedOperationException("Not yet implemented")
137109
}
138110

139111
/**
140112
* Handles requests to update one or more rows.
141113
*/
142-
@Override
143-
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
144-
Log.i(getClass().getName(), "update");
145-
146-
throw new UnsupportedOperationException("Not yet implemented");
114+
override fun update(
115+
uri: Uri,
116+
values: ContentValues?,
117+
selection: String?,
118+
selectionArgs: Array<String>?
119+
): Int {
120+
Log.i(javaClass.name, "update")
121+
122+
throw UnsupportedOperationException("Not yet implemented")
147123
}
148124

149125
/**
150126
* Handle requests to delete one or more rows.
151127
*/
152-
@Override
153-
public int delete(Uri uri, String selection, String[] selectionArgs) {
154-
Log.i(getClass().getName(), "delete");
128+
override fun delete(uri: Uri, selection: String?, selectionArgs: Array<String>?): Int {
129+
Log.i(javaClass.name, "delete")
155130

156-
throw new UnsupportedOperationException("Not yet implemented");
131+
throw UnsupportedOperationException("Not yet implemented")
132+
}
133+
134+
companion object {
135+
// The authority of this content provider
136+
const val AUTHORITY: String = BuildConfig.APPLICATION_ID + ".provider.word_provider"
137+
138+
private const val TABLE_WORDS = "words"
139+
private const val CODE_WORDS = 1
140+
private const val CODE_WORD_ID = 2
141+
private const val CODE_WORDS_BY_STORYBOOK_PARAGRAPH_ID = 3
142+
val URI_WORD: Uri = Uri.parse("content://" + AUTHORITY + "/" + TABLE_WORDS)
143+
144+
// The URI matcher
145+
private val MATCHER = UriMatcher(UriMatcher.NO_MATCH)
146+
147+
init {
148+
MATCHER.addURI(AUTHORITY, TABLE_WORDS, CODE_WORDS)
149+
MATCHER.addURI(AUTHORITY, TABLE_WORDS + "/#", CODE_WORD_ID)
150+
MATCHER.addURI(
151+
AUTHORITY,
152+
TABLE_WORDS + "/by-paragraph-id/#",
153+
CODE_WORDS_BY_STORYBOOK_PARAGRAPH_ID
154+
)
155+
}
157156
}
158157
}

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