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Code Issues Releases Wiki Activity

new database field: marks if book was found on the disk during last scan

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This commit is contained in:
Nikolay Pultsin 2011-07-17 13:05:39 +01:00
parent 911c99fce8
commit 05365b01d1
3 changed files with 36 additions and 5 deletions
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36
src/org/geometerplus/android/fbreader/library/SQLiteBooksDatabase.java
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@ -61,7 +61,7 @@ public final class SQLiteBooksDatabase extends BooksDatabase {
private void migrate(Context context) {
final int version = myDatabase.getVersion();
final int currentVersion = 16;
final int currentVersion = 17;
if (version >= currentVersion) {
return;
}
@ -102,6 +102,8 @@ public final class SQLiteBooksDatabase extends BooksDatabase {
updateTables14();
case 15:
updateTables15();
case 16:
updateTables16();
}
myDatabase.setTransactionSuccessful();
myDatabase.endTransaction();
@ -174,9 +176,9 @@ public final class SQLiteBooksDatabase extends BooksDatabase {
}
@Override
protected Map<Long,Book> loadBooks(FileInfoSet infos) {
protected Map<Long,Book> loadBooks(FileInfoSet infos, boolean existing) {
Cursor cursor = myDatabase.rawQuery(
"SELECT book_id,file_id,title,encoding,language FROM Books", null
"SELECT book_id,file_id,title,encoding,language FROM Books WHERE `exists` = " + (existing ? 1 : 0), null
);
final HashMap<Long,Book> booksById = new HashMap<Long,Book>();
final HashMap<Long,Book> booksByFileId = new HashMap<Long,Book>();
@ -252,7 +254,29 @@ public final class SQLiteBooksDatabase extends BooksDatabase {
return booksByFileId;
}
@Override
protected void setExistingFlag(Collection<Book> books, boolean flag) {
if (books.isEmpty()) {
return;
}
final StringBuilder bookSet = new StringBuilder("(");
boolean first = true;
for (Book b : books) {
if (first) {
first = false;
} else {
bookSet.append(",");
}
bookSet.append(b.getId());
}
bookSet.append(")");
myDatabase.execSQL(
"UPDATE Books SET `exists` = " + (flag ? 1 : 0) + " WHERE book_id IN " + bookSet
);
}
private SQLiteStatement myUpdateBookInfoStatement;
@Override
protected void updateBookInfo(long bookId, long fileId, String encoding, String language, String title) {
if (myUpdateBookInfoStatement == null) {
myUpdateBookInfoStatement = myDatabase.compileStatement(
@ -1186,4 +1210,10 @@ public final class SQLiteBooksDatabase extends BooksDatabase {
"hyperlink_id TEXT NOT NULL," +
"CONSTRAINT VisitedHyperlinks_Unique UNIQUE (book_id, hyperlink_id))");
}
private void updateTables16() {
myDatabase.execSQL(
"ALTER TABLE Books ADD COLUMN `exists` INTEGER DEFAULT 1"
);
}
}