/*
* Copyright 2010 Henry Coles
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and limitations under the License.
*/
package org.pitest.functional.prelude;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import org.pitest.functional.F;
import org.pitest.functional.SideEffect1;
import org.pitest.functional.predicate.And;
import org.pitest.functional.predicate.Not;
import org.pitest.functional.predicate.Or;
import org.pitest.functional.predicate.Predicate;
/**
* @author henry
*
*/
public abstract class Prelude {
public static final <A> And<A> and(final F<A, Boolean>... ps) {
return new And<A>(Arrays.asList(ps));
}
public static final <A> And<A> and(final Iterable<? extends F<A, Boolean>> ps) {
return new And<A>(ps);
}
public static final <A> Not<A> not(final F<A, Boolean> p) {
return new Not<A>(p);
}
public static final <A> Or<A> or(final Predicate<A>... ps) {
return new Or<A>(Arrays.asList(ps));
}
public static final <A> Or<A> or(final Iterable<Predicate<A>> ps) {
return new Or<A>(ps);
}
public static final <A> SideEffect1<A> accumulateTo(
final Collection<A> collection) {
return new SideEffect1<A>() {
@Override
public void apply(final A a) {
collection.add(a);
}
};
}
public static <A, B> SideEffect1<A> putToMap(final Map<A, B> map,
final B value) {
return new SideEffect1<A>() {
@Override
public void apply(final A key) {
map.put(key, value);
}
};
}
public static final <A> F<A, A> id() {
return new F<A, A>() {
@Override
public A apply(final A a) {
return a;
}
};
}
public static final <A> F<A, A> id(final Class<A> type) {
return id();
}
public static final <T> SideEffect1<T> print() {
return printTo(System.out);
}
public static final <T> SideEffect1<T> print(final Class<T> type) {
return print();
}
public static final <T> SideEffect1<T> printTo(final Class<T> type,
final PrintStream stream) {
return printTo(stream);
}
public static final <T> SideEffect1<T> printTo(final PrintStream stream) {
return new SideEffect1<T>() {
@Override
public void apply(final T a) {
stream.print(a);
}
};
}
public static <T> SideEffect1<T> printWith(final T t) {
return new SideEffect1<T>() {
@Override
public void apply(final T a) {
System.out.print(t + " : " + a);
}
};
}
public static <T extends Number> Predicate<T> isGreaterThan(final T value) {
return new Predicate<T>() {
@Override
public Boolean apply(final T o) {
return o.longValue() > value.longValue();
}
};
}
public static <T> Predicate<T> isEqualTo(final T value) {
return new Predicate<T>() {
@Override
public Boolean apply(final T o) {
return o.equals(value);
}
};
}
public static <T> Predicate<T> isNotNull() {
return new Predicate<T>() {
@Override
public Boolean apply(final T o) {
return (o != null);
}
};
}
public static <T> Predicate<T> isNull() {
return new Predicate<T>() {
@Override
public Boolean apply(final T o) {
return (o == null);
}
};
}
public static <T> F<T, Iterable<T>> asList(final Class<T> type) {
return new F<T, Iterable<T>>() {
@Override
public Iterable<T> apply(final T a) {
return Collections.singletonList(a);
}
};
}
public static <T> SideEffect1<T> noSideEffect(final Class<T> clazz) {
return new SideEffect1<T>() {
@Override
public void apply(final T a) {
}
};
}
}