| /* |
| * Copyright (C) 2006 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.internal.database; |
| |
| import android.database.AbstractCursor; |
| import android.database.CursorWindow; |
| |
| import java.lang.System; |
| import java.util.ArrayList; |
| |
| /** |
| * A convenience class that presents a two-dimensional ArrayList |
| * as a Cursor. |
| */ |
| public class ArrayListCursor extends AbstractCursor { |
| private String[] mColumnNames; |
| private ArrayList<Object>[] mRows; |
| |
| @SuppressWarnings({"unchecked"}) |
| public ArrayListCursor(String[] columnNames, ArrayList<ArrayList> rows) { |
| int colCount = columnNames.length; |
| boolean foundID = false; |
| // Add an _id column if not in columnNames |
| for (int i = 0; i < colCount; ++i) { |
| if (columnNames[i].compareToIgnoreCase("_id") == 0) { |
| mColumnNames = columnNames; |
| foundID = true; |
| break; |
| } |
| } |
| |
| if (!foundID) { |
| mColumnNames = new String[colCount + 1]; |
| System.arraycopy(columnNames, 0, mColumnNames, 0, columnNames.length); |
| mColumnNames[colCount] = "_id"; |
| } |
| |
| int rowCount = rows.size(); |
| mRows = new ArrayList[rowCount]; |
| |
| for (int i = 0; i < rowCount; ++i) { |
| mRows[i] = rows.get(i); |
| if (!foundID) { |
| mRows[i].add(i); |
| } |
| } |
| } |
| |
| @Override |
| public void fillWindow(int position, CursorWindow window) { |
| if (position < 0 || position > getCount()) { |
| return; |
| } |
| |
| window.acquireReference(); |
| try { |
| int oldpos = mPos; |
| mPos = position - 1; |
| window.clear(); |
| window.setStartPosition(position); |
| int columnNum = getColumnCount(); |
| window.setNumColumns(columnNum); |
| while (moveToNext() && window.allocRow()) { |
| for (int i = 0; i < columnNum; i++) { |
| final Object data = mRows[mPos].get(i); |
| if (data != null) { |
| if (data instanceof byte[]) { |
| byte[] field = (byte[]) data; |
| if (!window.putBlob(field, mPos, i)) { |
| window.freeLastRow(); |
| break; |
| } |
| } else { |
| String field = data.toString(); |
| if (!window.putString(field, mPos, i)) { |
| window.freeLastRow(); |
| break; |
| } |
| } |
| } else { |
| if (!window.putNull(mPos, i)) { |
| window.freeLastRow(); |
| break; |
| } |
| } |
| } |
| } |
| |
| mPos = oldpos; |
| } catch (IllegalStateException e){ |
| // simply ignore it |
| } finally { |
| window.releaseReference(); |
| } |
| } |
| |
| @Override |
| public int getCount() { |
| return mRows.length; |
| } |
| |
| @Override |
| public boolean deleteRow() { |
| return false; |
| } |
| |
| @Override |
| public String[] getColumnNames() { |
| return mColumnNames; |
| } |
| |
| @Override |
| public byte[] getBlob(int columnIndex) { |
| return (byte[]) mRows[mPos].get(columnIndex); |
| } |
| |
| @Override |
| public String getString(int columnIndex) { |
| Object cell = mRows[mPos].get(columnIndex); |
| return (cell == null) ? null : cell.toString(); |
| } |
| |
| @Override |
| public short getShort(int columnIndex) { |
| Number num = (Number) mRows[mPos].get(columnIndex); |
| return num.shortValue(); |
| } |
| |
| @Override |
| public int getInt(int columnIndex) { |
| Number num = (Number) mRows[mPos].get(columnIndex); |
| return num.intValue(); |
| } |
| |
| @Override |
| public long getLong(int columnIndex) { |
| Number num = (Number) mRows[mPos].get(columnIndex); |
| return num.longValue(); |
| } |
| |
| @Override |
| public float getFloat(int columnIndex) { |
| Number num = (Number) mRows[mPos].get(columnIndex); |
| return num.floatValue(); |
| } |
| |
| @Override |
| public double getDouble(int columnIndex) { |
| Number num = (Number) mRows[mPos].get(columnIndex); |
| return num.doubleValue(); |
| } |
| |
| @Override |
| public boolean isNull(int columnIndex) { |
| return mRows[mPos].get(columnIndex) == null; |
| } |
| } |