content: /*
   * Copyright 2012-2025 Aerospike, Inc.
   *
   * Portions may be licensed to Aerospike, Inc. under one or more contributor
   * license agreements WHICH ARE COMPATIBLE WITH THE APACHE LICENSE, VERSION 2.0.
   *
   * 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 com.aerospike.client.cluster;
  
  import java.util.HashMap;
  
  import com.aerospike.client.AerospikeException;
  import com.aerospike.client.Info;
  import com.aerospike.client.command.Buffer;
  
  /**
   * Parse rack-ids info command.
   */
  public final class RackParser extends Info {
  	static final String RebalanceGeneration = "rebalance-generation";
  	static final String RackIds = "rack-ids";
  
  	private final HashMap<String,Integer> racks;
  	private final int generation;
  
  	public RackParser(Node node, Connection conn) {
  		// Send format: rebalance-generation\nrack-ids\n
  		super(node, conn, RebalanceGeneration, RackIds);
  
  		if (length == 0) {
  			throw new AerospikeException.Parse("rack-ids response is empty");
  		}
  
  		this.racks = new HashMap<String,Integer>();
  		this.generation = parseGeneration();
  		parseRacks();
  	}
  
  	public int getGeneration() {
  		return generation;
  	}
  
  	public HashMap<String,Integer> getRacks() {
  		return racks;
  	}
  
  	private int parseGeneration() {
  		parseName(RebalanceGeneration);
  		int gen = parseInt();
  		expect('\n');
  		return gen;
  	}
  
  	private void parseRacks() {
  		// Use low-level info methods and parse byte array directly for maximum performance.
  		// Receive format: rack-ids\t<ns1>:<rack1>;<ns2>:<rack2>...\n
  		parseName(RackIds);
  
  		int begin = offset;
  
  		while (offset < length) {
  			if (buffer[offset] == ':') {
  				// Parse namespace.
  				String namespace = Buffer.utf8ToString(buffer, begin, offset - begin).trim();
  
  				if (namespace.length() <= 0 || namespace.length() >= 32) {
  					String response = getTruncatedResponse();
  					throw new AerospikeException.Parse("Invalid racks namespace " +
  						namespace + ". Response=" + response);
  				}
  				begin = ++offset;
  
  				// Parse rack.
  				while (offset < length) {
  					byte b = buffer[offset];
  
  					if (b == ';' || b == '\n') {
  						break;
  					}
  					offset++;
  				}
  				int rack = Integer.parseInt(new String(buffer, begin, offset - begin));
  
  				racks.put(namespace, rack);
  				begin = ++offset;
  			}
  			else {
  				offset++;
  			}
  		}
  	}
  }
  