content: /*
   * JBoss, Home of Professional Open Source
   * Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors
   * as indicated by the @authors tag. All rights reserved.
   * See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   *
   * 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 org.aesh.command.impl;
  
  import org.aesh.command.CommandResolver;
  import org.aesh.command.CommandNotFoundException;
  import org.aesh.command.container.CommandContainer;
  import org.aesh.command.invocation.CommandInvocation;
  import org.aesh.command.registry.CommandRegistry;
  import org.aesh.parser.LineParser;
  import org.aesh.parser.ParsedLine;
  
  /**
   * @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
   */
  public class AeshCommandResolver<CI extends CommandInvocation> implements CommandResolver<CI> {
  
      private CommandRegistry<CI> registry;
      private LineParser lineParser;
  
      public AeshCommandResolver(CommandRegistry<CI> commandRegistry) {
          this.registry = commandRegistry;
          lineParser = new LineParser();
      }
  
      public CommandRegistry<CI> getRegistry() {
          return registry;
      }
  
      @Override
      public CommandContainer<CI> resolveCommand(String line) throws CommandNotFoundException {
          return getCommand(lineParser.parseLine(line), line);
      }
  
      @Override
      public CommandContainer<CI> resolveCommand(ParsedLine line) throws CommandNotFoundException {
          return getCommand(line, line.line());
      }
  
      @Override
      public CommandContainer<CI> resolveCommand(String name, String line) throws CommandNotFoundException {
          return getCommand(name, line);
      }
  
      /**
       * try to return the command in the given registry if the given registry do not find the command, check if we have a
       * internal registry and if its there.
       *
       * @param aeshLine parsed command line
       * @param line command line
       * @return command
       * @throws CommandNotFoundException
       */
      private CommandContainer<CI> getCommand(ParsedLine aeshLine, String line) throws CommandNotFoundException {
          return getCommand(aeshLine.words().get(0).word(), line);
      }
  
      /**
       * try to return the command in the given registry if the given registry do
       * not find the command, check if we have a internal registry and if its
       * there.
       *
       * @param commandName command name
       * @param line command line
       * @return command
       * @throws CommandNotFoundException
       */
      private CommandContainer<CI> getCommand(String commandName, String line) throws CommandNotFoundException {
          try {
              return registry.getCommand(commandName, line);
          }
          catch (CommandNotFoundException e) {
              // Lookup in aliases
              return registry.getCommandByAlias(commandName);
          }
      }
  
  }
  