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/*
* Copyright (C) 2011 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.dialer.calllog;
import android.database.AbstractCursor;
import android.database.ContentObserver;
import android.database.Cursor;
import android.database.DataSetObserver;
import com.android.common.io.MoreCloseables;
/**
* Wraps a cursor to add an additional column with the same value for all rows.
* <p>
* The number of rows in the cursor and the set of columns is determined by the cursor being
* wrapped.
*/
public class ExtendedCursor extends AbstractCursor {
/** The cursor to wrap. */
private final Cursor mCursor;
/** The name of the additional column. */
private final String mColumnName;
/** The value to be assigned to the additional column. */
private final Object mValue;
/**
* Creates a new cursor which extends the given cursor by adding a column with a constant value.
*
* @param cursor the cursor to extend
* @param columnName the name of the additional column
* @param value the value to be assigned to the additional column
*/
public ExtendedCursor(Cursor cursor, String columnName, Object value) {
mCursor = cursor;
mColumnName = columnName;
mValue = value;
}
@Override
public int getCount() {
return mCursor.getCount();
}
@Override
public String[] getColumnNames() {
String[] columnNames = mCursor.getColumnNames();
int length = columnNames.length;
String[] extendedColumnNames = new String[length + 1];
System.arraycopy(columnNames, 0, extendedColumnNames, 0, length);
extendedColumnNames[length] = mColumnName;
return extendedColumnNames;
}
@Override
public String getString(int column) {
if (column == mCursor.getColumnCount()) {
return (String) mValue;
}
return mCursor.getString(column);
}
@Override
public short getShort(int column) {
if (column == mCursor.getColumnCount()) {
return (Short) mValue;
}
return mCursor.getShort(column);
}
@Override
public int getInt(int column) {
if (column == mCursor.getColumnCount()) {
return (Integer) mValue;
}
return mCursor.getInt(column);
}
@Override
public long getLong(int column) {
if (column == mCursor.getColumnCount()) {
return (Long) mValue;
}
return mCursor.getLong(column);
}
@Override
public float getFloat(int column) {
if (column == mCursor.getColumnCount()) {
return (Float) mValue;
}
return mCursor.getFloat(column);
}
@Override
public double getDouble(int column) {
if (column == mCursor.getColumnCount()) {
return (Double) mValue;
}
return mCursor.getDouble(column);
}
@Override
public boolean isNull(int column) {
if (column == mCursor.getColumnCount()) {
return mValue == null;
}
return mCursor.isNull(column);
}
@Override
public boolean onMove(int oldPosition, int newPosition) {
return mCursor.moveToPosition(newPosition);
}
@Override
public void close() {
MoreCloseables.closeQuietly(mCursor);
super.close();
}
@Override
public void registerContentObserver(ContentObserver observer) {
mCursor.registerContentObserver(observer);
}
@Override
public void unregisterContentObserver(ContentObserver observer) {
mCursor.unregisterContentObserver(observer);
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
mCursor.registerDataSetObserver(observer);
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
mCursor.unregisterDataSetObserver(observer);
}
}
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