gt:                 if (current.getLeft().compareTo(last.getLeft()) > 0) {
context: /*
   * Copyright (c) [2016] [ <ether.camp> ]
   * This file is part of the ethereumJ library.
   *
   * The ethereumJ library is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * The ethereumJ library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   * GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.ethereum.config.net;
  
  import com.google.common.base.MoreObjects;
  import org.apache.commons.lang3.tuple.Pair;
  import org.ethereum.config.BlockchainConfig;
  import org.ethereum.config.blockchain.*;
  import org.ethereum.core.genesis.GenesisConfig;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Convert JSON config from genesis to Java blockchain net config.
   * Created by Stan Reshetnyk on 23.12.2016.
   */
  public class JsonNetConfig extends BaseNetConfig {
  
      private static Logger logger = LoggerFactory.getLogger("general");
  
      final BlockchainConfig initialBlockConfig = new FrontierConfig();
  
      /**
       * We convert all string keys to lowercase before processing.
       *
       * Homestead block is 0 if not specified.
       * If Homestead block is specified then Frontier will be used for 0 block.
       *
       * @param config
       */
      public JsonNetConfig(GenesisConfig config) throws RuntimeException {
  
          final List<Pair<Integer, ? extends BlockchainConfig>> candidates = new ArrayList<>();
  
          {
              if (logger.isDebugEnabled())
                  logger.debug("Rendering net config from genesis {} ...", config);
  
  
              Pair<Integer, ? extends BlockchainConfig> lastCandidate = Pair.of(0, initialBlockConfig);
              if (logger.isDebugEnabled())
                  logger.debug("Block #{} => Frontier", lastCandidate.getLeft());
              candidates.add(lastCandidate);
  
              // homestead block assumed to be 0 by default
              lastCandidate = Pair.of(config.homesteadBlock == null ? 0 : config.homesteadBlock, new HomesteadConfig());
              if (logger.isDebugEnabled())
                  logger.debug("Block #{} => Homestead", lastCandidate.getLeft());
              candidates.add(lastCandidate);
  
              if (config.daoForkBlock != null) {
                  AbstractDaoConfig daoConfig = config.daoForkSupport ?
                          new DaoHFConfig(lastCandidate.getRight(), config.daoForkBlock) :
                          new DaoNoHFConfig(lastCandidate.getRight(), config.daoForkBlock);
                  lastCandidate = Pair.of(config.daoForkBlock, daoConfig);
                  if (logger.isDebugEnabled())
                      logger.debug("Block #{} => DaoForkSupport", lastCandidate.getLeft());
                  candidates.add(lastCandidate);
              }
  
              if (config.eip150Block != null) {
                  lastCandidate = Pair.of(config.eip150Block, new Eip150HFConfig(lastCandidate.getRight()));
                  if (logger.isDebugEnabled())
                      logger.debug("Block #{} => EIP150", lastCandidate.getLeft());
                  candidates.add(lastCandidate);
              }
  
              if (config.eip155Block != null || config.eip158Block != null) {
                  int block;
                  StringBuilder logLine = new StringBuilder();
                  if (config.eip155Block != null) {
                      if (config.eip158Block != null && !config.eip155Block.equals(config.eip158Block)) {
                          throw new RuntimeException("Unable to build config with different blocks for EIP155 (" + config.eip155Block + ") and EIP158 (" + config.eip158Block + ")");
                      }
                      block = config.eip155Block;
                      if (logger.isDebugEnabled())
                          logLine.append("Block #").append(block).append(" => EIP155");
                  } else {
                      block = config.eip158Block;
                      if (logger.isDebugEnabled())
                          logLine.append("Block #").append(block).append(" => EIP158");
                  }
  
                  if (config.chainId != null) {
                      final int chainId = config.chainId;
                      if (logger.isDebugEnabled())
                          logLine.append(", chainId: ").append(chainId);
                      lastCandidate = Pair.of(block, new Eip160HFConfig(lastCandidate.getRight()) {
                          @Override
                          public Integer getChainId() {
                              return chainId;
                          }
  
                          @Override
                          public String toString() {
                              return Eip160HFConfig.class.getSimpleName();
                          }
                      });
                  } else {
                      lastCandidate = Pair.of(block, new Eip160HFConfig(lastCandidate.getRight()));
                  }
                  if (logger.isDebugEnabled())
                      logger.debug(logLine.toString());
                  candidates.add(lastCandidate);
              }
  
              if (config.byzantiumBlock != null) {
                  StringBuilder logLine = new StringBuilder();
                  if (logger.isDebugEnabled())
                      logLine.append("Block #").append(config.byzantiumBlock).append(" => Byzantium");
                  if (config.chainId != null) {
                      final int chainId = config.chainId;
                      if (logger.isDebugEnabled())
                          logLine.append(", chainId: ").append(chainId);
                      lastCandidate = Pair.of(config.byzantiumBlock, new ByzantiumConfig(lastCandidate.getRight()) {
                          @Override
                          public Integer getChainId() {
                              return chainId;
                          }
  
                          @Override
                          public String toString() {
                              return ByzantiumConfig.class.getSimpleName();
                          }
                      });
                  } else {
                      lastCandidate = Pair.of(config.byzantiumBlock, new ByzantiumConfig(lastCandidate.getRight()));
                  }
                  if (logger.isDebugEnabled())
                      logger.debug(logLine.toString());
                  candidates.add(lastCandidate);
              }
  
              if (config.constantinopleBlock != null) {
                  StringBuilder logLine = new StringBuilder();
                  if (logger.isDebugEnabled())
                      logLine.append("Block #").append(config.constantinopleBlock).append(" => Constantinople");
                  if (config.chainId != null) {
                      final int chainId = config.chainId;
                      if (logger.isDebugEnabled())
                          logLine.append(", chainId: ").append(chainId);
                      lastCandidate = Pair.of(config.constantinopleBlock, new ConstantinopleConfig(lastCandidate.getRight()) {
                          @Override
                          public Integer getChainId() {
                              return chainId;
                          }
  
                          @Override
                          public String toString() {
                              return ConstantinopleConfig.class.getSimpleName();
                          }
                      });
                  } else {
                      lastCandidate = Pair.of(config.constantinopleBlock, new ConstantinopleConfig(lastCandidate.getRight()));
                  }
                  if (logger.isDebugEnabled())
                      logger.debug(logLine.toString());
                  candidates.add(lastCandidate);
              }
  
              if (config.petersburgBlock != null) {
                  StringBuilder logLine = new StringBuilder();
                  if (logger.isDebugEnabled())
                      logLine.append("Block #").append(config.petersburgBlock).append(" => Petersburg");
                  if (config.chainId != null) {
                      final int chainId = config.chainId;
                      if (logger.isDebugEnabled())
                          logLine.append(", chainId: ").append(chainId);
                      lastCandidate = Pair.of(config.petersburgBlock, new PetersburgConfig(lastCandidate.getRight()) {
                          @Override
                          public Integer getChainId() {
                              return chainId;
                          }
  
                          @Override
                          public String toString() {
                              return PetersburgConfig.class.getSimpleName();
                          }
                      });
                  } else {
                      lastCandidate = Pair.of(config.petersburgBlock, new PetersburgConfig(lastCandidate.getRight()));
                  }
                  if (logger.isDebugEnabled())
                      logger.debug(logLine.toString());
                  candidates.add(lastCandidate);
              }
          }
  
          if (logger.isDebugEnabled())
              logger.debug("Finished rendering net config from genesis {}", config);
  
          {
              // add candidate per each block (take last in row for same block)
              Pair<Integer, ? extends BlockchainConfig> last = candidates.remove(0);
              for (Pair<Integer, ? extends BlockchainConfig> current : candidates) {
  