#154 Vertices

src/main/java/com/vssekorin/cactoosmath/graph/Vertices.java

@@ -0,0 +1,46 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2017-2018 Vseslav Sekorin
+ *
+ * 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 NONINFRINGEMENT. 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 com.vssekorin.cactoosmath.graph;
+
+import com.vssekorin.cactoosmath.Graph;
+import com.vssekorin.cactoosmath.set.SetEnvelope;
+
+/**
+ * Graph vertices.
+ *
+ * @author Vseslav Sekorin (vssekorin@gmail.com)
+ * @version $Id$
+ * @param <T> Elements type
+ * @since 0.2
+ */
+public final class Vertices<T> extends SetEnvelope<T> {
+
+    /**
+     * Ctor.
+     * @param graph Graph
+     */
+    public Vertices(final Graph<T> graph) {
+        super(() -> graph.asMap().keySet());
+    }
+}

src/main/java/com/vssekorin/cactoosmath/graph/directed/RemoveEdge.java

@@ -36,7 +36,7 @@
  *
  * @author Vseslav Sekorin (vssekorin@gmail.com)
  * @version $Id$
- * @param <T> Type of matrix
+ * @param <T> Elements type
  * @since 0.1
  */
 public final class RemoveEdge<T> extends DirectedGraphEnvelope<T> {

src/main/java/com/vssekorin/cactoosmath/graph/directed/RemoveNode.java

@@ -36,7 +36,7 @@
  *
  * @author Vseslav Sekorin (vssekorin@gmail.com)
  * @version $Id$
- * @param <T> Type of matrix
+ * @param <T> Elements type
  * @since 0.1
  */
 public final class RemoveNode<T> extends DirectedGraphEnvelope<T> {

src/main/java/com/vssekorin/cactoosmath/graph/undirected/RemoveEdge.java

@@ -36,7 +36,7 @@
  *
  * @author Vseslav Sekorin (vssekorin@gmail.com)
  * @version $Id$
- * @param <T> Type of matrix
+ * @param <T> Elements type
  * @since 0.1
  */
 public final class RemoveEdge<T> extends UndirectedGraphEnvelope<T> {

src/main/java/com/vssekorin/cactoosmath/graph/undirected/RemoveNode.java

@@ -36,7 +36,7 @@
  *
  * @author Vseslav Sekorin (vssekorin@gmail.com)
  * @version $Id$
- * @param <T> Type of matrix
+ * @param <T> Elements type
  * @since 0.1
  */
 public final class RemoveNode<T> extends UndirectedGraphEnvelope<T> {

src/test/java/com/vssekorin/cactoosmath/graph/VerticesTest.java

@@ -0,0 +1,60 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2017-2018 Vseslav Sekorin
+ *
+ * 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 NONINFRINGEMENT. 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 com.vssekorin.cactoosmath.graph;
+
+import com.vssekorin.cactoosmath.set.SetOf;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import org.hamcrest.CoreMatchers;
+import org.hamcrest.MatcherAssert;
+import org.junit.Test;
+
+/**
+ * Test case for {@link Vertices}.
+ *
+ * @author Vseslav Sekorin (vssekorin@gmail.com)
+ * @version $Id$
+ * @since 0.2
+ * @checkstyle JavadocMethodCheck (500 lines)
+ * @checkstyle MagicNumberCheck (500 lines)
+ */
+public final class VerticesTest {
+
+    @Test
+    public void get() {
+        MatcherAssert.assertThat(
+            new Vertices<>(
+                () -> {
+                    final Map<Integer, Set<Integer>> result = new HashMap<>();
+                    result.put(1, new SetOf<>(1, 2));
+                    result.put(2, new SetOf<>(2));
+                    result.put(3, new SetOf<>(1, 2, 3));
+                    return result;
+                }
+            ),
+            CoreMatchers.hasItems(1, 2, 3)
+        );
+    }
+}