| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.documentsui; |
| |
| import static com.android.documentsui.DocumentsActivity.TAG; |
| |
| import android.database.AbstractCursor; |
| import android.database.Cursor; |
| import android.os.Bundle; |
| import android.provider.DocumentsContract.Document; |
| import android.util.Log; |
| |
| /** |
| * Cursor wrapper that filters MIME types not matching given list. |
| */ |
| public class FilteringCursorWrapper extends AbstractCursor { |
| private final Cursor mCursor; |
| |
| private final int[] mPosition; |
| private int mCount; |
| |
| public FilteringCursorWrapper(Cursor cursor, String[] acceptMimes) { |
| this(cursor, acceptMimes, null, Long.MIN_VALUE); |
| } |
| |
| public FilteringCursorWrapper(Cursor cursor, String[] acceptMimes, String[] rejectMimes) { |
| this(cursor, acceptMimes, rejectMimes, Long.MIN_VALUE); |
| } |
| |
| public FilteringCursorWrapper( |
| Cursor cursor, String[] acceptMimes, String[] rejectMimes, long rejectBefore) { |
| mCursor = cursor; |
| |
| final int count = cursor.getCount(); |
| mPosition = new int[count]; |
| |
| cursor.moveToPosition(-1); |
| while (cursor.moveToNext()) { |
| final String mimeType = cursor.getString( |
| cursor.getColumnIndex(Document.COLUMN_MIME_TYPE)); |
| final long lastModified = cursor.getLong( |
| cursor.getColumnIndex(Document.COLUMN_LAST_MODIFIED)); |
| if (rejectMimes != null && MimePredicate.mimeMatches(rejectMimes, mimeType)) { |
| continue; |
| } |
| if (lastModified < rejectBefore) { |
| continue; |
| } |
| if (MimePredicate.mimeMatches(acceptMimes, mimeType)) { |
| mPosition[mCount++] = cursor.getPosition(); |
| } |
| } |
| |
| Log.d(TAG, "Before filtering " + cursor.getCount() + ", after " + mCount); |
| } |
| |
| @Override |
| public Bundle getExtras() { |
| return mCursor.getExtras(); |
| } |
| |
| @Override |
| public void close() { |
| super.close(); |
| mCursor.close(); |
| } |
| |
| @Override |
| public boolean onMove(int oldPosition, int newPosition) { |
| return mCursor.moveToPosition(mPosition[newPosition]); |
| } |
| |
| @Override |
| public String[] getColumnNames() { |
| return mCursor.getColumnNames(); |
| } |
| |
| @Override |
| public int getCount() { |
| return mCount; |
| } |
| |
| @Override |
| public double getDouble(int column) { |
| return mCursor.getDouble(column); |
| } |
| |
| @Override |
| public float getFloat(int column) { |
| return mCursor.getFloat(column); |
| } |
| |
| @Override |
| public int getInt(int column) { |
| return mCursor.getInt(column); |
| } |
| |
| @Override |
| public long getLong(int column) { |
| return mCursor.getLong(column); |
| } |
| |
| @Override |
| public short getShort(int column) { |
| return mCursor.getShort(column); |
| } |
| |
| @Override |
| public String getString(int column) { |
| return mCursor.getString(column); |
| } |
| |
| @Override |
| public int getType(int column) { |
| return mCursor.getType(column); |
| } |
| |
| @Override |
| public boolean isNull(int column) { |
| return mCursor.isNull(column); |
| } |
| } |