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.completer;
  
  import org.aesh.command.completer.CompleterInvocation;
  import org.aesh.command.completer.OptionCompleter;
  import org.aesh.impl.util.FileLister;
  import org.aesh.io.Resource;
  import org.aesh.io.filter.AllResourceFilter;
  import org.aesh.io.filter.ResourceFilter;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Completes {@link Resource} objects
   *
   * @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
   */
  public class FileOptionCompleter implements OptionCompleter<CompleterInvocation> {
  
      private final ResourceFilter filter;
  
      public FileOptionCompleter() {
          this(new AllResourceFilter());
      }
  
      public FileOptionCompleter(ResourceFilter filter) {
          if (filter == null) {
              throw new IllegalArgumentException("A valid filter must be informed");
          }
          this.filter = filter;
      }
  
      @Override
      public void complete(CompleterInvocation completerInvocation) {
          List<String> candidates = new ArrayList<>();
          int cursor = new FileLister(completerInvocation.getGivenCompleteValue(),
                  completerInvocation.getAeshContext().getCurrentWorkingDirectory()).
                  findMatchingDirectories(candidates);
          boolean appendSpace = false;
          if (candidates.size() == 1) {
              if (completerInvocation.getGivenCompleteValue().endsWith(candidates.get(0))) {
                  appendSpace = true;
              }
          }
          completerInvocation.addAllCompleterValues(candidates);
          completerInvocation.setOffset(completerInvocation.getGivenCompleteValue().length() - cursor);
          completerInvocation.setAppendSpace(appendSpace);
      }
  
      public ResourceFilter getFilter() {
          return filter;
      }
  }
  