LightJason - AgentSpeak(L++)
CDecrement.java
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23 
24 package org.lightjason.agentspeak.language.execution.expressionunary;
25 
32 
33 import javax.annotation.Nonnull;
34 import java.util.List;
35 import java.util.stream.Stream;
36 
37 
41 public final class CDecrement<T extends Number> implements IUnaryExpression<T>
42 {
46  private static final long serialVersionUID = -5980848121313572183L;
50  private final IVariable<T> m_variable;
51 
57  @Nonnull
58  public CDecrement( @Nonnull final IVariable<T> p_variable )
59  {
60  m_variable = p_variable;
61  }
62 
63  @Override
64  public final String toString()
65  {
66  return m_variable.toString() + "--";
67  }
68 
69  @Nonnull
70  @Override
71  public final IFuzzyValue<Boolean> execute( final boolean p_parallel, @Nonnull final IContext p_context,
72  @Nonnull final List<ITerm> p_argument, @Nonnull final List<ITerm> p_return )
73  {
74  final IVariable<Number> l_variable = CCommon.replaceFromContext( p_context, m_variable ).<IVariable<Number>>term().thrownotallocated();
75  if ( l_variable.valueassignableto( Number.class ) )
76  l_variable.set( l_variable.<Number>raw().doubleValue() - 1 );
77 
78  return CFuzzyValue.from( true );
79  }
80 
81  @Nonnull
82  @Override
83  public final Stream<IVariable<?>> variables()
84  {
85  return Stream.of( m_variable );
86  }
87 }
T thrownotallocated()
throws an illegal state exception iif the variable is not allocated
CDecrement( @Nonnull final IVariable< T > p_variable)
ctor
Definition: CDecrement.java:58
boolean valueassignableto( @Nonnull final Class<?>... p_class)
checkes assignable of the value
IVariable< T > set( @Nullable final T p_value)
sets the value
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
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: CDecrement.java:71
static List< ITerm > replaceFromContext( @Nonnull final IContext p_context, @Nonnull final Collection<? extends ITerm > p_terms)
replace variables with context variables
final Stream< IVariable<?> > variables()
returns a stream with all used variables
Definition: CDecrement.java:83
result for an immutable fuzzy value