LightJason - AgentSpeak(L++)
action/builtin/collection/list/CSymmetricDifference.java
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1 /*
2  * @cond LICENSE
3  * ######################################################################################
4  * # LGPL License #
5  * # #
6  * # This file is part of the LightJason AgentSpeak(L++) #
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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 #
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22  */
23 
24 package org.lightjason.agentspeak.action.builtin.collection.list;
25 
26 import com.google.common.collect.ConcurrentHashMultiset;
27 import com.google.common.collect.Multiset;
35 
36 import javax.annotation.Nonnegative;
37 import javax.annotation.Nonnull;
38 import java.util.Collections;
39 import java.util.Comparator;
40 import java.util.List;
41 import java.util.stream.Collectors;
42 
43 
53 public final class CSymmetricDifference extends IBuiltinAction
54 {
55 
59  private static final long serialVersionUID = 7657032978898575726L;
60 
65  {
66  super( 3 );
67  }
68 
69  @Nonnegative
70  @Override
71  public final int minimalArgumentNumber()
72  {
73  return 2;
74  }
75 
76  @Nonnull
77  @Override
78  public final IFuzzyValue<Boolean> execute( final boolean p_parallel, @Nonnull final IContext p_context,
79  @Nonnull final List<ITerm> p_argument, @Nonnull final List<ITerm> p_return )
80  {
81  // create a multiset and counts the occurence of element -> on an odd number the element will be returned
82  final Multiset<Object> l_count = ConcurrentHashMultiset.create();
83  CCommon.flatten( p_argument ).parallel().map( ITerm::raw ).forEach( l_count::add );
84  final List<Object> l_result = l_count.entrySet()
85  .parallelStream()
86  .filter( i -> i.getCount() % 2 == 1 )
87  .map( Multiset.Entry::getElement ).collect( Collectors.toList() );
88  l_result.sort( Comparator.comparing( Object::hashCode ) );
89 
90  p_return.add(
91  CRawTerm.from(
92  p_parallel
93  ? Collections.synchronizedList( l_result )
94  : l_result
95  )
96  );
97 
98  return CFuzzyValue.from( true );
99  }
100 
101 }
base class of build-in actions for setting name by package/classname (without prefix character) ...
static< N > IFuzzyValue< N > from( @Nonnull final N p_value)
factory
common structure for execution definition
execution context with local data
Definition: IContext.java:42
static Stream< ITerm > flatten( @Nonnull final Collection<? extends ITerm > p_terms)
flat term-in-term collection into a straight term list
creates the symmetric difference between lists (difference of union and intersection).
result for an immutable fuzzy value
< T > T raw()
cast to any raw value type
static< N > CRawTerm< N > from(final N p_value)
factory for a raw term
Definition: CRawTerm.java:104
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
term structure for simple datatypes
Definition: CRawTerm.java:45