#415 Sorted collection

src/main/java/org/cactoos/collection/Sorted.java

@@ -0,0 +1,172 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.collection;
+
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import org.cactoos.list.ListOf;
+import org.cactoos.scalar.StickyScalar;
+import org.cactoos.scalar.SyncScalar;
+import org.cactoos.scalar.UncheckedScalar;
+
+/**
+ * Sorted collection.
+ *
+ * <p>There is no thread-safety guarantee.</p>
+ *
+ * @author Yegor Bugayenko (yegor256@gmail.com)
+ * @version $Id$
+ * @param <T> Element type
+ * @since 0.19
+ */
+@SuppressWarnings("PMD.TooManyMethods")
+public final class Sorted<T extends Comparable<? super T>> implements
+    Collection<T> {
+
+    /**
+     * Sorted one.
+     */
+    private final UncheckedScalar<Collection<T>> scalar;
+
+    /**
+     * Ctor.
+     * @param src The underlying collection
+     */
+    @SafeVarargs
+    public Sorted(final T... src) {
+        this(new ListOf<>(src));
+    }
+
+    /**
+     * Ctor.
+     * @param src The underlying collection
+     */
+    public Sorted(final Iterable<T> src) {
+        this(Comparator.naturalOrder(), new ListOf<>(src));
+    }
+
+    /**
+     * Ctor.
+     * @param src The underlying collection
+     * @param cmp The comparator
+     */
+    @SafeVarargs
+    public Sorted(final Comparator<T> cmp, final T... src) {
+        this(cmp, new ListOf<>(src));
+    }
+
+    /**
+     * Ctor.
+     * @param src The underlying collection
+     * @param cmp The comparator
+     */
+    public Sorted(final Comparator<T> cmp, final Collection<T> src) {
+        this.scalar = new UncheckedScalar<>(
+            new SyncScalar<>(
+                new StickyScalar<>(
+                    () -> {
+                        final List<T> items = new LinkedList<>();
+                        items.addAll(src);
+                        items.sort(cmp);
+                        return items;
+                    }
+                )
+            )
+        );
+    }
+
+    @Override
+    public String toString() {
+        return this.scalar.value().toString();
+    }
+
+    @Override
+    public int size() {
+        return this.scalar.value().size();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return this.scalar.value().isEmpty();
+    }
+
+    @Override
+    public boolean contains(final Object item) {
+        return this.scalar.value().contains(item);
+    }
+
+    @Override
+    public Iterator<T> iterator() {
+        return this.scalar.value().iterator();
+    }
+
+    @Override
+    public Object[] toArray() {
+        return this.scalar.value().toArray();
+    }
+
+    @Override
+    @SuppressWarnings("PMD.UseVarargs")
+    public <X> X[] toArray(final X[] array) {
+        return this.scalar.value().toArray(array);
+    }
+
+    @Override
+    public boolean add(final T item) {
+        throw new UnsupportedOperationException("#add()");
+    }
+
+    @Override
+    public boolean remove(final Object item) {
+        throw new UnsupportedOperationException("#remove()");
+    }
+
+    @Override
+    public boolean containsAll(final Collection<?> list) {
+        return this.scalar.value().containsAll(list);
+    }
+
+    @Override
+    public boolean addAll(final Collection<? extends T> list) {
+        throw new UnsupportedOperationException("#addAll()");
+    }
+
+    @Override
+    public boolean removeAll(final Collection<?> list) {
+        throw new UnsupportedOperationException("#removeAll()");
+    }
+
+    @Override
+    public boolean retainAll(final Collection<?> list) {
+        throw new UnsupportedOperationException("#retainAll()");
+    }
+
+    @Override
+    public void clear() {
+        throw new UnsupportedOperationException("#clear()");
+    }
+}

src/main/java/org/cactoos/iterator/Sorted.java

@@ -28,6 +28,7 @@
 import java.util.LinkedList;
 import java.util.List;
 import org.cactoos.scalar.StickyScalar;
+import org.cactoos.scalar.SyncScalar;
 import org.cactoos.scalar.UncheckedScalar;
 
 /**
@@ -64,15 +65,17 @@ public Sorted(final Iterator<T> items) {
      */
     public Sorted(final Comparator<T> comparator, final Iterator<T> iterator) {
         this.scalar = new UncheckedScalar<>(
-            new StickyScalar<>(
-                () -> {
-                    final List<T> items = new LinkedList<>();
-                    while (iterator.hasNext()) {
-                        items.add(iterator.next());
+            new SyncScalar<>(
+                new StickyScalar<>(
+                    () -> {
+                        final List<T> items = new LinkedList<>();
+                        while (iterator.hasNext()) {
+                            items.add(iterator.next());
+                        }
+                        items.sort(comparator);
+                        return items.iterator();
                     }
-                    items.sort(comparator);
-                    return items.iterator();
-                }
+                )
             )
         );
     }

src/test/java/org/cactoos/collection/SortedTest.java

@@ -0,0 +1,56 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.collection;
+
+import org.cactoos.list.ListOf;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test Case for {@link Sorted}.
+ * @author Yegor Bugayenko (yegor256@gmail.com)
+ * @version $Id$
+ * @since 0.19
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class SortedTest {
+
+    @Test
+    @SuppressWarnings("PMD.AvoidDuplicateLiterals")
+    public void sortsCollection() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't sort elements in iterator",
+            new Sorted<>(
+                new ListOf<>(
+                    "one", "two", "three", "four"
+                )
+            ),
+            Matchers.contains(
+                "four", "one", "three", "two"
+            )
+        );
+    }
+
+}

src/test/java/org/cactoos/iterator/SortedTest.java

@@ -0,0 +1,56 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.iterator;
+
+import org.cactoos.iterable.IterableOf;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test Case for {@link Sorted}.
+ * @author Yegor Bugayenko (yegor256@gmail.com)
+ * @version $Id$
+ * @since 0.19
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class SortedTest {
+
+    @Test
+    @SuppressWarnings("PMD.AvoidDuplicateLiterals")
+    public void sortsIterable() throws Exception {
+        MatcherAssert.assertThat(
+            "Can't sort elements in iterator",
+            () -> new Sorted<>(
+                new IterableOf<>(
+                    "one", "two", "three", "four"
+                ).iterator()
+            ),
+            Matchers.contains(
+                "four", "one", "three", "two"
+            )
+        );
+    }
+
+}