Java Array to Map toMap(String... args)

Description

Transforms the given array into a key-value map using the following rules

• keys start with a dash (-) e.g.

  License

  Open Source License

  Parameter

  Parameter	Description
  args	array of arguments

  Return

  map with the transformed array values

  Declaration

  public static Map<String, Object> toMap(String... args) 
  

  Method Source Code

  //package com.java2s;
  /*******************************************************************************
   * Copyright (c) 2017 BestSolution.at and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors://w w w . j av a 2s.co  m
   *     Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
   *******************************************************************************/
  
  import java.util.ArrayList;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  public class Main {
      /**
       * Transforms the given array into a key-value map using the following rules
       * <ul>
       * <li>keys start with a dash (-) e.g. <code>-path /tmp</code> transforms
       * into <code>{ path => /tmp }</code></li>
       * <li>a key without a value associates {@link Boolean#TRUE} with the key
       * e.g. <code>-console -consoleLog</code> transforms into
       * <code>{ console => true, consoleLog => true }</code></li>
       * <li>a key followed by multiple values associates an {@link List} with the
       * key e.g. <code>-path /tmp /private/tmp</code> transforms into
       * <code>{ path => [ /tmp, /private/tmp ] }</code></li>
       * </ul>
       *
       * @param args
       *            array of arguments
       * @return map with the transformed array values
       */
      public static Map<String, Object> toMap(String... args) {
          Map<String, Object> rv = new HashMap<>();
          for (int i = 0; i < args.length; i++) {
              if (args[i].startsWith("-")) { //$NON-NLS-1$
                  List<String> l = new ArrayList<>();
                  String key = args[i].substring(1);
                  if (i + 1 < args.length && !args[i + 1].startsWith("-")) { //$NON-NLS-1$
                      do {
                          l.add(args[++i]);
                      } while (i + 1 < args.length && !args[i + 1].startsWith("-")); //$NON-NLS-1$
                      if (l.size() == 1) {
                          rv.put(key, l.get(0));
                      } else {
                          rv.put(key, l);
                      }
                  } else {
                      rv.put(args[i].substring(1), Boolean.TRUE);
                  }
              }
          }
          return rv;
      }
  }
  

  Related

  1. arrayToMap(int[] array)
  2. toMap(K[] keys, V[] values)
  3. toMap(K[] keys, V[] values)
  4. toMap(String... keysAndValues)
  5. toMap(String[] keyNames, T[] values)
  6. toMap(String[] keys)
  7. toMap(String[]... wordMappings)