Java tutorial
/* * 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 android.database; import android.annotation.UnsupportedAppUsage; import android.content.ContentResolver; import android.net.Uri; import android.os.Bundle; /** * Wrapper class for Cursor that delegates all calls to the actual cursor object. The primary * use for this class is to extend a cursor while overriding only a subset of its methods. */ public class CursorWrapper implements Cursor { /** @hide */ @UnsupportedAppUsage protected final Cursor mCursor; /** * Creates a cursor wrapper. * @param cursor The underlying cursor to wrap. */ public CursorWrapper(Cursor cursor) { mCursor = cursor; } /** * Gets the underlying cursor that is wrapped by this instance. * * @return The wrapped cursor. */ public Cursor getWrappedCursor() { return mCursor; } @Override public void close() { mCursor.close(); } @Override public boolean isClosed() { return mCursor.isClosed(); } @Override public int getCount() { return mCursor.getCount(); } @Override @Deprecated public void deactivate() { mCursor.deactivate(); } @Override public boolean moveToFirst() { return mCursor.moveToFirst(); } @Override public int getColumnCount() { return mCursor.getColumnCount(); } @Override public int getColumnIndex(String columnName) { return mCursor.getColumnIndex(columnName); } @Override public int getColumnIndexOrThrow(String columnName) throws IllegalArgumentException { return mCursor.getColumnIndexOrThrow(columnName); } @Override public String getColumnName(int columnIndex) { return mCursor.getColumnName(columnIndex); } @Override public String[] getColumnNames() { return mCursor.getColumnNames(); } @Override public double getDouble(int columnIndex) { return mCursor.getDouble(columnIndex); } @Override public void setExtras(Bundle extras) { mCursor.setExtras(extras); } @Override public Bundle getExtras() { return mCursor.getExtras(); } @Override public float getFloat(int columnIndex) { return mCursor.getFloat(columnIndex); } @Override public int getInt(int columnIndex) { return mCursor.getInt(columnIndex); } @Override public long getLong(int columnIndex) { return mCursor.getLong(columnIndex); } @Override public short getShort(int columnIndex) { return mCursor.getShort(columnIndex); } @Override public String getString(int columnIndex) { return mCursor.getString(columnIndex); } @Override public void copyStringToBuffer(int columnIndex, CharArrayBuffer buffer) { mCursor.copyStringToBuffer(columnIndex, buffer); } @Override public byte[] getBlob(int columnIndex) { return mCursor.getBlob(columnIndex); } @Override public boolean getWantsAllOnMoveCalls() { return mCursor.getWantsAllOnMoveCalls(); } @Override public boolean isAfterLast() { return mCursor.isAfterLast(); } @Override public boolean isBeforeFirst() { return mCursor.isBeforeFirst(); } @Override public boolean isFirst() { return mCursor.isFirst(); } @Override public boolean isLast() { return mCursor.isLast(); } @Override public int getType(int columnIndex) { return mCursor.getType(columnIndex); } @Override public boolean isNull(int columnIndex) { return mCursor.isNull(columnIndex); } @Override public boolean moveToLast() { return mCursor.moveToLast(); } @Override public boolean move(int offset) { return mCursor.move(offset); } @Override public boolean moveToPosition(int position) { return mCursor.moveToPosition(position); } @Override public boolean moveToNext() { return mCursor.moveToNext(); } @Override public int getPosition() { return mCursor.getPosition(); } @Override public boolean moveToPrevious() { return mCursor.moveToPrevious(); } @Override public void registerContentObserver(ContentObserver observer) { mCursor.registerContentObserver(observer); } @Override public void registerDataSetObserver(DataSetObserver observer) { mCursor.registerDataSetObserver(observer); } @Override @Deprecated public boolean requery() { return mCursor.requery(); } @Override public Bundle respond(Bundle extras) { return mCursor.respond(extras); } @Override public void setNotificationUri(ContentResolver cr, Uri uri) { mCursor.setNotificationUri(cr, uri); } @Override public Uri getNotificationUri() { return mCursor.getNotificationUri(); } @Override public void unregisterContentObserver(ContentObserver observer) { mCursor.unregisterContentObserver(observer); } @Override public void unregisterDataSetObserver(DataSetObserver observer) { mCursor.unregisterDataSetObserver(observer); } }