LightJason - AgentSpeak(L++)
map/CKeys.java
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1 /*
2  * @cond LICENSE
3  * ######################################################################################
4  * # LGPL License #
5  * # #
6  * # This file is part of the LightJason AgentSpeak(L++) #
7  * # Copyright (c) 2015-19, LightJason (info@lightjason.org) #
8  * # This program is free software: you can redistribute it and/or modify #
9  * # it under the terms of the GNU Lesser General Public License as #
10  * # published by the Free Software Foundation, either version 3 of the #
11  * # License, or (at your option) any later version. #
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13  * # This program is distributed in the hope that it will be useful, #
14  * # but WITHOUT ANY WARRANTY; without even the implied warranty of #
15  * # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
16  * # GNU Lesser General Public License for more details. #
17  * # #
18  * # You should have received a copy of the GNU Lesser General Public License #
19  * # along with this program. If not, see http://www.gnu.org/licenses/ #
20  * ######################################################################################
21  * @endcond
22  */
23 
24 package org.lightjason.agentspeak.action.builtin.collection.map;
25 
32 
33 import javax.annotation.Nonnegative;
34 import javax.annotation.Nonnull;
35 import java.util.Collections;
36 import java.util.List;
37 import java.util.Map;
38 import java.util.stream.Collectors;
39 
40 
48 public final class CKeys extends IBuiltinAction
49 {
53  private static final long serialVersionUID = -8840624356230583535L;
54 
58  public CKeys()
59  {
60  super( 3 );
61  }
62 
63  @Nonnegative
64  @Override
65  public final int minimalArgumentNumber()
66  {
67  return 1;
68  }
69 
70  @Nonnull
71  @Override
72  public final IFuzzyValue<Boolean> execute( final boolean p_parallel, @Nonnull final IContext p_context,
73  @Nonnull final List<ITerm> p_argument, @Nonnull final List<ITerm> p_return )
74  {
75  // arguments are map references
76  final List<?> l_result = p_argument.stream()
77  .flatMap( i -> i.<Map<?, ?>>raw().keySet().stream() )
78  .sorted()
79  .distinct()
80  .collect( Collectors.toList() );
81 
82  p_return.add(
83  CRawTerm.from(
84  p_parallel ? Collections.synchronizedList( l_result ) : l_result
85  )
86  );
87  return CFuzzyValue.from( true );
88  }
89 
90 }
base class of build-in actions for setting name by package/classname (without prefix character) ...
final int minimalArgumentNumber()
minimum number of arguments
Definition: map/CKeys.java:65
static< N > IFuzzyValue< N > from( @Nonnull final N p_value)
factory
execution context with local data
Definition: IContext.java:42
result for an immutable fuzzy value
final IFuzzyValue< Boolean > execute(final boolean p_parallel, @Nonnull final IContext p_context, @Nonnull final List< ITerm > p_argument, @Nonnull final List< ITerm > p_return)
defines a plan-body operation
Definition: map/CKeys.java:72
static< N > CRawTerm< N > from(final N p_value)
factory for a raw term
Definition: CRawTerm.java:104
term structure for simple datatypes
Definition: CRawTerm.java:45