CGet.java

  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.                                    #
  12.  * #                                                                                    #
  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. package org.lightjason.agentspeak.action.builtin.math.blas.vector;

  24. import cern.colt.matrix.tdouble.DoubleMatrix1D;
  25. import org.lightjason.agentspeak.action.builtin.IBuiltinAction;
  26. import org.lightjason.agentspeak.language.CCommon;
  27. import org.lightjason.agentspeak.language.CRawTerm;
  28. import org.lightjason.agentspeak.language.ITerm;
  29. import org.lightjason.agentspeak.language.execution.IContext;
  30. import org.lightjason.agentspeak.language.fuzzy.CFuzzyValue;
  31. import org.lightjason.agentspeak.language.fuzzy.IFuzzyValue;

  32. import javax.annotation.Nonnegative;
  33. import javax.annotation.Nonnull;
  34. import java.util.List;
  35. import java.util.stream.Collectors;


  36. /**
  37.  * returns a single element of a vector.
  38.  * The action returns the values by the given index,
  39.  * first argument is the vector and all other values
  40.  * are the index values, the action never fails
  41.  *
  42.  * {@code [X|Y|Z] = math/blas/vector/get( Vector, 1, [4, 5] );}
  43.  */
  44. public final class CGet extends IBuiltinAction
  45. {
  46.     /**
  47.      * serial id
  48.      */
  49.     private static final long serialVersionUID = -6309098788207323909L;

  50.     /**
  51.      * ctor
  52.      */
  53.     public CGet()
  54.     {
  55.         super( 4 );
  56.     }

  57.     @Nonnegative
  58.     @Override
  59.     public final int minimalArgumentNumber()
  60.     {
  61.         return 2;
  62.     }

  63.     @Nonnull
  64.     @Override
  65.     public final IFuzzyValue<Boolean> execute( final boolean p_parallel, @Nonnull final IContext p_context,
  66.                                                @Nonnull final List<ITerm> p_argument, @Nonnull final List<ITerm> p_return )
  67.     {
  68.         final List<ITerm> l_arguments = CCommon.flatten( p_argument ).collect( Collectors.toList() );

  69.         l_arguments.stream()
  70.                    .skip( 1 )
  71.                    .map( ITerm::<Number>raw )
  72.                    .map( Number::intValue )
  73.                    .map( i -> l_arguments.get( 0 ).<DoubleMatrix1D>raw().get( i ) )
  74.                    .map( CRawTerm::from )
  75.                    .forEach( p_return::add );

  76.         return CFuzzyValue.from( true );
  77.     }
  78. }