CHammingDistance.java
- /*
- * @cond LICENSE
- * ######################################################################################
- * # LGPL License #
- * # #
- * # This file is part of the LightJason AgentSpeak(L++) #
- * # Copyright (c) 2015-19, LightJason (info@lightjason.org) #
- * # This program is free software: you can redistribute it and/or modify #
- * # it under the terms of the GNU Lesser General Public License as #
- * # published by the Free Software Foundation, either version 3 of the #
- * # License, or (at your option) any later version. #
- * # #
- * # This program is distributed in the hope that it will be useful, #
- * # but WITHOUT ANY WARRANTY; without even the implied warranty of #
- * # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
- * # GNU Lesser General Public License for more details. #
- * # #
- * # You should have received a copy of the GNU Lesser General Public License #
- * # along with this program. If not, see http://www.gnu.org/licenses/ #
- * ######################################################################################
- * @endcond
- */
- package org.lightjason.agentspeak.action.builtin.math.bit.matrix;
- import cern.colt.matrix.tbit.BitMatrix;
- import org.lightjason.agentspeak.action.builtin.IBuiltinAction;
- import org.lightjason.agentspeak.language.CCommon;
- import org.lightjason.agentspeak.language.CRawTerm;
- import org.lightjason.agentspeak.language.ITerm;
- import org.lightjason.agentspeak.language.execution.IContext;
- import org.lightjason.agentspeak.language.fuzzy.CFuzzyValue;
- import org.lightjason.agentspeak.language.fuzzy.IFuzzyValue;
- import javax.annotation.Nonnegative;
- import javax.annotation.Nonnull;
- import java.util.List;
- import java.util.stream.Collectors;
- /**
- * calculates the hamming distance.
- * The action calculates between bit matrices,
- * the distance will be calculated between the first
- * and all other arguments, the action never fails
- *
- * {@code [A|B] = math/bit/matrix/hammingdistance( Matrix1, Matrix2, Matrix3 );}
- * @see https://en.wikipedia.org/wiki/Hamming_distance
- */
- public final class CHammingDistance extends IBuiltinAction
- {
- /**
- * serial id
- */
- private static final long serialVersionUID = 8167680292117761543L;
- @Nonnegative
- @Override
- public final int minimalArgumentNumber()
- {
- return 1;
- }
- @Nonnull
- @Override
- public 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 )
- {
- final List<BitMatrix> l_arguments = CCommon.flatten( p_argument ).map( ITerm::<BitMatrix>raw ).collect( Collectors.toList() );
- if ( l_arguments.size() < 2 )
- return CFuzzyValue.from( false );
- l_arguments.stream()
- .skip( 1 )
- .map( BitMatrix::copy )
- .peek( i -> i.xor( l_arguments.get( 0 ) ) )
- .mapToDouble( BitMatrix::cardinality )
- .boxed()
- .map( CRawTerm::from )
- .forEach( p_return::add );
- return CFuzzyValue.from( true );
- }
- }