| /* |
| * 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.query.stat; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import org.apache.ignite.internal.util.tostring.GridToStringInclude; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| |
| /** |
| * All statistics by some object (table or index). |
| */ |
| public class ObjectStatisticsImpl implements Cloneable, ObjectStatistics { |
| /** Total number of rows in object. */ |
| private final long rowsCnt; |
| |
| /** Map columnKey to its statistic. */ |
| @GridToStringInclude |
| private final Map<String, ColumnStatistics> colNameToStat; |
| |
| /** |
| * Constructor. |
| * |
| * @param rowsCnt Total rows count. |
| * @param colNameToStat Column names to statistics map. |
| */ |
| public ObjectStatisticsImpl( |
| long rowsCnt, |
| Map<String, ColumnStatistics> colNameToStat |
| ) { |
| assert rowsCnt >= 0 : "rowsCnt >= 0"; |
| |
| assert colNameToStat != null : "colNameToStat != null"; |
| |
| this.rowsCnt = rowsCnt; |
| this.colNameToStat = colNameToStat; |
| } |
| |
| /** |
| * @return Object rows count. |
| */ |
| public long rowCount() { |
| return rowsCnt; |
| } |
| |
| /** |
| * Get column statistics. |
| * |
| * @param colName Column name. |
| * @return Column statistics or {@code null} if there are no statistics for specified column. |
| */ |
| public ColumnStatistics columnStatistics(String colName) { |
| return colNameToStat.get(colName); |
| } |
| |
| /** |
| * @return Column statistics map. |
| */ |
| public Map<String, ColumnStatistics> columnsStatistics() { |
| return colNameToStat; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public ObjectStatisticsImpl clone() { |
| return new ObjectStatisticsImpl(rowsCnt, new HashMap<>(colNameToStat)); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean equals(Object o) { |
| if (this == o) |
| return true; |
| if (o == null || getClass() != o.getClass()) |
| return false; |
| |
| ObjectStatisticsImpl that = (ObjectStatisticsImpl)o; |
| |
| return rowsCnt == that.rowsCnt |
| && Objects.equals(colNameToStat, that.colNameToStat); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int hashCode() { |
| return Objects.hash(rowsCnt, colNameToStat); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(ObjectStatisticsImpl.class, this); |
| } |
| |
| /** |
| * Remove specified columns from clone of current ObjectStatistics object. |
| * |
| * @param cols Columns to remove. |
| * @return Cloned object without specified columns statistics. |
| */ |
| public <T extends ObjectStatisticsImpl> T subtract(Set<String> cols) { |
| T res = (T)clone(); |
| |
| for (String col : cols) |
| res.columnsStatistics().remove(col); |
| |
| return res; |
| } |
| } |