/*
 * 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.solr.common.cloud;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

public class Aliases {

  private Map<String,Map<String,String>> aliasMap;

  public Aliases(Map<String,Map<String,String>> aliasMap) {
    this.aliasMap = aliasMap;
  }

  public Aliases() {
    this.aliasMap = new HashMap<>();
  }
  
  public Map<String,String> getCollectionAliasMap() {
    Map<String,String> cam = aliasMap.get("collection");
    if (cam == null) return null;
    return Collections.unmodifiableMap(cam);
  }
  
  public Map<String,Map<String,String>> getAliasMap() {
    return Collections.unmodifiableMap(aliasMap);
  }

  public int collectionAliasSize() {
    Map<String,String> cam = aliasMap.get("collection");
    if (cam == null) return 0;
    return cam.size();
  }
  
  @Override
  public String toString() {
    return "Aliases [aliasMap=" + aliasMap + "]";
  }

  public String getCollectionAlias(String collectionName) {
    Map<String,String> cam = aliasMap.get("collection");
    if (cam == null) return null;
    return cam.get(collectionName);
  }

}