MultiFunction.java

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package com.github.dakusui.pcond.experimentals.currying.multi;
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import com.github.dakusui.pcond.core.printable.PrintableFunction;
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import java.util.ArrayList;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Objects;
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import java.util.function.Function;
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import java.util.function.Supplier;
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import static com.github.dakusui.pcond.internals.InternalChecks.requireArgumentListSize;
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import static java.util.Objects.requireNonNull;
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import static java.util.stream.Collectors.joining;
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/**
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 * An interface that represents a function that can have more than one parameters.
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 * This interface is often used in combination with {@link com.github.dakusui.pcond.forms.Functions#curry(MultiFunction)} method.
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 *
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 * @param <R> The type of the returned value.
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 */
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public interface MultiFunction<R> extends Function<List<? super Object>, R> {
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  /**
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   * Returns a name of this function.
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   *
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   * @return The name of this function.
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   */
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  String name();
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  /**
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   * Returns the number of parameters that this function can take.
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   *
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   * @return the number of parameters
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   */
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  int arity();
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  /**
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   * The expected type of the {@code i}th parameter.
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   *
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   * @param i The parameter index.
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   * @return The type of {@code i}th parameter.
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   */
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  Class<?> parameterType(int i);
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  /**
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   * The type of the value returned by this function.
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   *
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   * @return The type of the returned value.
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   */
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  Class<? extends R> returnType();
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  class Impl<R> extends PrintableFunction<List<? super Object>, R> implements MultiFunction<R> {
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    private final String         name;
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    private final List<Class<?>> parameterTypes;
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    protected Impl(
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        Object creator,
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        List<Object> args,
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        Supplier<String> formatter,
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        String name,
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        Function<? super List<? super Object>, ? extends R> function,
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        List<Class<?>> parameterTypes) {
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      super(
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          creator,
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          args,
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          formatter,
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          function);
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      this.name = name;
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      this.parameterTypes = new ArrayList<>(parameterTypes);
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    }
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    @Override
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    public String name() {
74 1 1. name : replaced return value with "" for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::name → KILLED
 
      return name;
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    }
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    @Override
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    public int arity() {
79 1 1. arity : replaced int return with 0 for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::arity → KILLED
 
      return parameterTypes.size();
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    }
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    @Override
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    public Class<?> parameterType(int i) {
84 1 1. parameterType : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::parameterType → KILLED
 
      return parameterTypes.get(i);
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    }
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  }
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  /**
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   * A builder for a {@link MultiFunction} instance.
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   *
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   * @param <R> The type of value returned by the multi-function built by this object.
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   */
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  class Builder<R> {
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    private final Object                                              creator        = Builder.class;
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    private       List<Object>                                        identityArgs;
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    private       String                                              name           = "(anonymous)";
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    private final Function<? super List<? super Object>, ? extends R> body;
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    private final List<Class<?>>                                      parameterTypes = new LinkedList<>();
100 1 1. lambda$new$0 : replaced return value with "" for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::lambda$new$0 → NO_COVERAGE
 
    private       Supplier<String>                                    formatter      = () -> name + "(" + parameterTypes.stream().map(Class::getSimpleName).collect(joining(",")) + ")";
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    public Builder(Function<List<Object>, R> body) {
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      requireNonNull(body);
104 1 1. lambda$new$1 : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::lambda$new$1 → KILLED
 
      this.body = args -> body.apply(requireArgumentListSize(requireNonNull(args), parameterTypes.size()));
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    }
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    public Builder<R> addParameters(List<Class<?>> parameterTypes) {
108 1 1. addParameters : removed call to java/util/stream/Stream::forEach → KILLED
 
      requireNonNull(parameterTypes).stream().map(this::addParameter).forEach(Objects::requireNonNull);
109 1 1. addParameters : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::addParameters → KILLED
 
      return this;
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    }
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    public Builder<R> identityArgs(List<Object> identity) {
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      this.identityArgs = requireNonNull(identity);
114 1 1. identityArgs : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::identityArgs → KILLED
 
      return this;
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    }
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    public Builder<R> name(String name) {
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      this.name = name;
119 1 1. name : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::name → KILLED
 
      return this;
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    }
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    public Builder<R> addParameter(Class<?> parameterType) {
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      this.parameterTypes.add(requireNonNull(parameterType));
124 1 1. addParameter : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::addParameter → KILLED
 
      return this;
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    }
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    public Builder<R> formatter(Supplier<String> formatter) {
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      this.formatter = requireNonNull(formatter);
129 1 1. formatter : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::formatter → KILLED
 
      return this;
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    }
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    public MultiFunction<R> $() {
133 1 1. $ : replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::$ → KILLED
 
      return new Impl<R>(
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          this.creator,
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          this.identityArgs,
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          this.formatter,
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          this.name,
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          this.body,
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          this.parameterTypes
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      );
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    }
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  }
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}

Mutations

74

1.1
Location : name
Killed by : com.github.dakusui.pcond.ut.CurryingTest.givenCurriedFunction$whenToStringOnOngoing$thenExpectedResultReturned(com.github.dakusui.pcond.ut.CurryingTest) replaced return value with "" for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::name → KILLED
79

1.1
Location : arity
Killed by : com.github.dakusui.pcond.ut.CurryingTest.givenCurriedFunction$whenApplyNextMoreThanExpected$thenNoSuchElementIsThrown(com.github.dakusui.pcond.ut.CurryingTest) replaced int return with 0 for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::arity → KILLED
84

1.1
Location : parameterType
Killed by : com.github.dakusui.pcond.ut.CurryingTest.given_nullToCurriedFuncWithStringParam$whenIsValidArg$thenTrue(com.github.dakusui.pcond.ut.CurryingTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Impl::parameterType → KILLED
100

1.1
Location : lambda$new$0
Killed by : none replaced return value with "" for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::lambda$new$0 → NO_COVERAGE
104

1.1
Location : lambda$new$1
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.runMultiParameterFunction$thenExpectedValueReturned(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::lambda$new$1 → KILLED
108

1.1
Location : addParameters
Killed by : com.github.dakusui.pcond.ut.CurryingTest.givenCurriedFunction$whenApplyExpectedTimes$thenExpectedResultReturned(com.github.dakusui.pcond.ut.CurryingTest) removed call to java/util/stream/Stream::forEach → KILLED
109

1.1
Location : addParameters
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::addParameters → KILLED
114

1.1
Location : identityArgs
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::identityArgs → KILLED
119

1.1
Location : name
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::name → KILLED
124

1.1
Location : addParameter
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::addParameter → KILLED
129

1.1
Location : formatter
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::formatter → KILLED
133

1.1
Location : $
Killed by : com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest.testEqualsWithDifferentObjects(com.github.dakusui.pcond.ut.FunctionsTest$MultiFunctionTest) replaced return value with null for com/github/dakusui/pcond/experimentals/currying/multi/MultiFunction$Builder::$ → KILLED

Active mutators

Tests examined


Report generated by PIT 1.7.3