Merge branch '__rultor'

src/main/java/org/cactoos/func/Or.java

@@ -0,0 +1,79 @@
+/**
+ * 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.func;
+
+import java.util.Iterator;
+import org.cactoos.Scalar;
+
+/**
+ * Logical disjunction.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Vseslav Sekorin ([email protected])
+ * @version $Id$
+ * @since 0.8
+ */
+public final class Or implements Scalar<Boolean> {
+
+    /**
+     * The iterator.
+     */
+    private final Iterable<Scalar<Boolean>> iterable;
+
+    /**
+     * Ctor.
+     * @param iterable The iterable
+     */
+    public Or(final Iterable<Scalar<Boolean>> iterable) {
+        this.iterable = iterable;
+    }
+
+    @Override
+    public Boolean asValue() throws Exception {
+        final Iterator<Scalar<Boolean>> iterator = this.iterable.iterator();
+        return this.disjunction(iterator, false);
+    }
+
+    /**
+     * Disjunction.
+     *
+     * @param iterator The iterator
+     * @param value Previous value
+     * @return The result
+     * @throws Exception If fails
+     */
+    private Boolean disjunction(
+        final Iterator<Scalar<Boolean>> iterator,
+        final boolean value
+    ) throws Exception {
+        final Boolean result;
+        if (iterator.hasNext() && !value) {
+            result = this.disjunction(iterator, iterator.next().asValue());
+        } else {
+            result = value;
+        }
+        return result;
+    }
+}

src/test/java/org/cactoos/func/OrTest.java

@@ -0,0 +1,99 @@
+/**
+ * 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.func;
+
+import org.cactoos.Scalar;
+import org.cactoos.list.ArrayAsIterable;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test case for {@link Or}.
+ *
+ * @author Vseslav Sekorin ([email protected])
+ * @version $Id$
+ * @since 0.8
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class OrTest {
+
+    @Test
+    public void allFalse() throws Exception {
+        MatcherAssert.assertThat(
+            new Or(
+                new ArrayAsIterable<Scalar<Boolean>>(
+                    new False(),
+                    new False(),
+                    new False(),
+                    new False(),
+                    new False()
+                )
+            ).asValue(),
+            Matchers.equalTo(false)
+        );
+    }
+
+    @Test
+    public void oneTrue() throws Exception {
+        MatcherAssert.assertThat(
+            new Or(
+                new ArrayAsIterable<Scalar<Boolean>>(
+                    new False(),
+                    new True(),
+                    new False(),
+                    new False(),
+                    new False()
+                )
+            ).asValue(),
+            Matchers.equalTo(true)
+        );
+    }
+
+    @Test
+    public void allTrue() throws Exception {
+        MatcherAssert.assertThat(
+            new Or(
+                new ArrayAsIterable<Scalar<Boolean>>(
+                    new True(),
+                    new True(),
+                    new True(),
+                    new True(),
+                    new True()
+                )
+            ).asValue(),
+            Matchers.equalTo(true)
+        );
+    }
+
+    @Test
+    public void emptyIterator() throws Exception {
+        MatcherAssert.assertThat(
+            new Or(
+                new ArrayAsIterable<Scalar<Boolean>>()
+            ).asValue(),
+            Matchers.equalTo(false)
+        );
+    }
+}