| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.ignite.internal.processors.cache.persistence.tree.io; |
| |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.internal.processors.cache.persistence.tree.util.PageHandler; |
| |
| /** |
| * Abstract IO routines for B+Tree leaf pages. |
| */ |
| public abstract class BPlusLeafIO<L> extends BPlusIO<L> { |
| /** |
| * @param type Page type. |
| * @param ver Page format version. |
| * @param itemSize Single item size on page. |
| */ |
| protected BPlusLeafIO(int type, int ver, int itemSize) { |
| super(type, ver, true, true, itemSize); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int getMaxCount(long pageAddr, int pageSize) { |
| return (pageSize - ITEMS_OFF) / getItemSize(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public final void copyItems(long srcPageAddr, long dstPageAddr, int srcIdx, int dstIdx, int cnt, |
| boolean cpLeft) throws IgniteCheckedException { |
| assert srcIdx != dstIdx || srcPageAddr != dstPageAddr; |
| |
| PageHandler.copyMemory(srcPageAddr, offset(srcIdx), dstPageAddr, offset(dstIdx), |
| cnt * getItemSize()); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public final int offset(int idx) { |
| assert idx >= 0: idx; |
| |
| return ITEMS_OFF + idx * getItemSize(); |
| } |
| } |