AbstractWindowedCursor.java revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
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 base class for Cursors that store their data in {@link CursorWindow}s. 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic abstract class AbstractWindowedCursor extends AbstractCursor 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public byte[] getBlob(int columnIndex) 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (byte[])getUpdatedField(columnIndex); 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getBlob(mPos, columnIndex); 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String getString(int columnIndex) 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (String)getUpdatedField(columnIndex); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getString(mPos, columnIndex); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void copyStringToBuffer(int columnIndex, CharArrayBuffer buffer) 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.copyStringToBuffer(columnIndex, buffer); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWindow.copyStringToBuffer(mPos, columnIndex, buffer); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public short getShort(int columnIndex) 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Number value = (Number)getUpdatedField(columnIndex); 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return value.shortValue(); 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getShort(mPos, columnIndex); 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getInt(int columnIndex) 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Number value = (Number)getUpdatedField(columnIndex); 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return value.intValue(); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getInt(mPos, columnIndex); 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public long getLong(int columnIndex) 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Number value = (Number)getUpdatedField(columnIndex); 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return value.longValue(); 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getLong(mPos, columnIndex); 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public float getFloat(int columnIndex) 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Number value = (Number)getUpdatedField(columnIndex); 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return value.floatValue(); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getFloat(mPos, columnIndex); 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public double getDouble(int columnIndex) 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Number value = (Number)getUpdatedField(columnIndex); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return value.doubleValue(); 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.getDouble(mPos, columnIndex); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isNull(int columnIndex) 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getUpdatedField(columnIndex) == null; 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.isNull(mPos, columnIndex); 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isBlob(int columnIndex) 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkPosition(); 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized(mUpdatedRows) { 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFieldUpdated(columnIndex)) { 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Object object = getUpdatedField(columnIndex); 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return object == null || object instanceof byte[]; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow.isBlob(mPos, columnIndex); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void checkPosition() 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.checkPosition(); 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mWindow == null) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new StaleDataException("Access closed cursor"); 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 CursorWindow getWindow() { 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow; 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set a new cursor window to cursor, usually set a remote cursor window 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param window cursor window 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setWindow(CursorWindow window) { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mWindow != null) { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWindow.close(); 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWindow = window; 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean hasWindow() { 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWindow != null; 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This needs be updated in {@link #onMove} by subclasses, and 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be set to NULL when the contents of the cursor change. 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected CursorWindow mWindow; 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 205