19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.database; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A convience class that lets you present an array of Cursors as a single linear Cursor. 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The schema of the cursors presented is entirely up to the creator of the MergeCursor, and 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * may be different if that is desired. Calls to getColumns, getColumnIndex, etc will return the 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * value for the row that the MergeCursor is currently pointing at. 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class MergeCursor extends AbstractCursor 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private DataSetObserver mObserver = new DataSetObserver() { 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onChanged() { 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Reset our position so the optimizations in move-related code 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // don't screw us over 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPos = -1; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onInvalidated() { 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPos = -1; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MergeCursor(Cursor[] cursors) 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors = cursors; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursor = cursors[0]; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < mCursors.length; i++) { 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] == null) continue; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].registerDataSetObserver(mObserver); 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getCount() 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = 0; 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count += mCursors[i].getCount(); 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return count; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onMove(int oldPosition, int newPosition) 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Find the right cursor */ 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursor = null; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int cursorStartPos = 0; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length; i++) { 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] == null) { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newPosition < (cursorStartPos + mCursors[i].getCount())) { 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursor = mCursors[i]; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cursorStartPos += mCursors[i].getCount(); 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Move it to the right position */ 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursor != null) { 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean ret = mCursor.moveToPosition(newPosition - cursorStartPos); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return ret; 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @deprecated 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean deleteRow() 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.deleteRow(); 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @deprecated 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean commitUpdates() { 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].commitUpdates(); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onChange(true); 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String getString(int column) 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getString(column); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public short getShort(int column) 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getShort(column); 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getInt(int column) 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getInt(column); 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public long getLong(int column) 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getLong(column); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public float getFloat(int column) 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getFloat(column); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public double getDouble(int column) 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getDouble(column); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isNull(int column) 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.isNull(column); 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public byte[] getBlob(int column) 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getBlob(column); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String[] getColumnNames() 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursor != null) { 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCursor.getColumnNames(); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new String[0]; 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void deactivate() 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].deactivate(); 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 188f68258f454b54367ee83999fa747c2c633dc2496satok super.deactivate(); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void close() { 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] == null) continue; 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].close(); 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 198f68258f454b54367ee83999fa747c2c633dc2496satok super.close(); 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void registerContentObserver(ContentObserver observer) { 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].registerContentObserver(observer); 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void unregisterContentObserver(ContentObserver observer) { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].unregisterContentObserver(observer); 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void registerDataSetObserver(DataSetObserver observer) { 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].registerDataSetObserver(observer); 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void unregisterDataSetObserver(DataSetObserver observer) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] != null) { 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCursors[i].unregisterDataSetObserver(observer); 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requery() 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int length = mCursors.length; 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0 ; i < length ; i++) { 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i] == null) { 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCursors[i].requery() == false) { 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Cursor mCursor; // updated in onMove 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Cursor[] mCursors; 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 260