content: /*
   * 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.carbondata.core.metadata.schema.indextable;
  
  import java.io.IOException;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.util.ObjectSerializationUtil;
  
  /**
   * Carbon Index properties holder
   */
  public class IndexMetadata implements Serializable {
  
    private static final long serialVersionUID = -8076464279248926823L;
    /**
     * index provider and map of index table name and its index properties
     */
    private Map<String, Map<String, Map<String, String>>> indexProviderMap;
    /**
     * parent table name of this index table
     */
    private String parentTableName;
    /**
     * location of parent table, path till table folder
     */
    private String parentTablePath;
    /**
     * table ID of parent table
     */
    private String parentTableId;
    /**
     * flag to check for index table
     */
    private boolean isIndexTable;
  
    public IndexMetadata(boolean isIndexTable) {
      this.isIndexTable = isIndexTable;
    }
  
    public IndexMetadata(String parentTableName, boolean isIndexTable, String parentTablePath) {
      this(isIndexTable);
      this.parentTableName = parentTableName;
      this.parentTablePath = parentTablePath;
    }
  
    public IndexMetadata(Map<String, Map<String, Map<String, String>>> indexProviderMap,
        String parentTableName, boolean isIndexTable, String parentTablePath, String parentTableId) {
      this(parentTableName, isIndexTable, parentTablePath);
      this.indexProviderMap = indexProviderMap;
      this.parentTableId = parentTableId;
    }
  
    public void addIndexTableInfo(String providerName, String tableName,
        Map<String, String> indexProperties) {
      if (null == indexProviderMap) {
        indexProviderMap = new ConcurrentHashMap<>();
      }
      if (null == indexProviderMap.get(providerName) || indexProviderMap.isEmpty()) {
        Map<String, Map<String, String>> indexMap = new ConcurrentHashMap<>();
        indexMap.put(tableName, indexProperties);
        indexProviderMap.put(providerName, indexMap);
      } else {
        indexProviderMap.get(providerName).put(tableName, indexProperties);
      }
    }
  
    public void removeIndexTableInfo(String indexName) {
      if (null != indexProviderMap) {
        for (Map.Entry<String, Map<String, Map<String, String>>> indexProviderEntry : indexProviderMap
            .entrySet()) {
          Map<String, Map<String, String>> indexMap = indexProviderEntry.getValue();
          if (indexMap.containsKey(indexName)) {
            indexProviderMap.get(indexProviderEntry.getKey()).remove(indexName);
          }
        }
      }
    }
  
    public void renameIndexWithStatus(String indexProvider, String oldIndexName,
        String newIndexName, String indexStatus) {
      if (null != indexProviderMap) {
        Map<String, String> properties = indexProviderMap.get(indexProvider).remove(oldIndexName);
        if (properties != null) {
          properties.put(CarbonCommonConstants.INDEX_STATUS, indexStatus);
          indexProviderMap.get(indexProvider).put(newIndexName, properties);
        }
      }
    }
  
    public void updateIndexStatus(String indexProvider, String indexName, String indexStatus) {
      if (null != indexProviderMap) {
        indexProviderMap.get(indexProvider).get(indexName)
            .put(CarbonCommonConstants.INDEX_STATUS, indexStatus);
      }
    }
  
    public List<String> getIndexTables() {
      if (null != indexProviderMap) {
        List<String> indexTables = new ArrayList<>();
        for (Map.Entry<String, Map<String, Map<String, String>>> mapEntry : indexProviderMap
            .entrySet()) {
          indexTables.addAll(mapEntry.getValue().keySet());
        }
        return indexTables;
      } else {
        return new ArrayList<String>();
      }
    }
  
    public List<String> getIndexTables(String indexProvider) {
      if (null != indexProviderMap && null != indexProviderMap.get(indexProvider)) {
        return new ArrayList<>(indexProviderMap.get(indexProvider).keySet());
      } else {
        return new ArrayList<>();
      }
    }
  
    /**
     * indexTableMap will be null if index table info is not loaded.
     */
    public Map<String, Map<String, Map<String, String>>> getIndexesMap() {
      return indexProviderMap;
    }
  
    public String getParentTableName() {
      return parentTableName;
    }
  
    public boolean isIndexTable() {
      return isIndexTable;
    }
  
    public String getParentTablePath() {
      return parentTablePath;
    }
  
    public String getParentTableId() {
      return parentTableId;
    }
  
    public String serialize() throws IOException {
      return ObjectSerializationUtil.convertObjectToString(this);
    }
  
    public static IndexMetadata deserialize(String serializedIndexMeta) throws IOException {
      if (null == serializedIndexMeta) {
        return null;
      }
      return (IndexMetadata) ObjectSerializationUtil.convertStringToObject(serializedIndexMeta);
    }
  
    public String getIndexColumns(String provider, String indexName) {
      return indexProviderMap.get(provider).get(indexName).get(CarbonCommonConstants.INDEX_COLUMNS);
    }
  
    public String getIndexStatus(String provider, String indexName) {
      return indexProviderMap.get(provider).get(indexName).get(CarbonCommonConstants.INDEX_STATUS);
    }
  }
  