| /* |
| * Copyright (C) 2012 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.contacts.database; |
| |
| import android.database.AbstractCursor; |
| import android.database.CursorIndexOutOfBoundsException; |
| |
| /** |
| * A cursor that is empty. |
| * <p> |
| * If you want an empty cursor, this class is better than a MatrixCursor because it has less |
| * overhead. |
| */ |
| final public class EmptyCursor extends AbstractCursor { |
| |
| private String[] mColumns; |
| |
| public EmptyCursor(String[] columns) { |
| this.mColumns = columns; |
| } |
| |
| @Override |
| public int getCount() { |
| return 0; |
| } |
| |
| @Override |
| public String[] getColumnNames() { |
| return mColumns; |
| } |
| |
| @Override |
| public String getString(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public short getShort(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public int getInt(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public long getLong(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public float getFloat(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public double getDouble(int column) { |
| throw cursorException(); |
| } |
| |
| @Override |
| public boolean isNull(int column) { |
| throw cursorException(); |
| } |
| |
| private CursorIndexOutOfBoundsException cursorException() { |
| return new CursorIndexOutOfBoundsException("Operation not permitted on an empty cursor."); |
| } |
| } |