added triple comparator example with unit test

pom.xml

@@ -31,6 +31,8 @@
 		<cglib.version>3.2.10</cglib.version>
 		<!-- RUNTIME-COMPILER version -->
 		<runtime-compiler.version>1.2</runtime-compiler.version>
+		<!-- COMMONS-LANG3 version -->
+		<commons-lang3.version>3.9</commons-lang3.version>
 	</properties>
 
 	<licenses>
@@ -77,7 +79,12 @@
 				<groupId>de.alpharogroup</groupId>
 				<artifactId>jobj-contract-verifier</artifactId>
 				<version>${jobj-contract-verifier.version}</version>
-				<scope>test</scope>
+			</dependency>
+			<!-- COMMONS-LANG3 DEPENDENCY -->
+			<dependency>
+				<groupId>org.apache.commons</groupId>
+				<artifactId>commons-lang3</artifactId>
+				<version>${commons-lang3.version}</version>
 			</dependency>
 
 		</dependencies>
@@ -91,7 +98,6 @@
 			<artifactId>jobj-contract-verifier</artifactId>
 			<scope>test</scope>
 		</dependency>
-
 		<!-- TEST-OBJECTS DEPENDENCY -->
 		<dependency>
 			<groupId>de.alpharogroup</groupId>
@@ -111,6 +117,13 @@
 			<scope>test</scope>
 		</dependency>
 
+		<!-- COMMONS-LANG3 DEPENDENCY -->
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 	</dependencies>
-	
+
 </project>

src/test/java/de/alpharogroup/collection/comparators/TripleComparator.java

@@ -0,0 +1,57 @@
+/**
+ * The MIT License
+ *
+ * Copyright (C) 2015 Asterios Raptis
+ *
+ * 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 de.alpharogroup.collection.comparators;
+
+import java.util.Comparator;
+
+import org.apache.commons.lang3.builder.CompareToBuilder;
+
+import de.alpharogroup.collections.pairs.Triple;
+
+/**
+ * The class {@link TripleComparator} is a comparator for {@link Triple} objects.
+ *
+ * @param <L>
+ *            The type of the left content of this Triple.
+ * @param <M>
+ *            The type of the middle content of this Triple.
+ * @param <R>
+ *            The type of the right content of this Triple.
+ */
+public class TripleComparator<L, M, R> implements Comparator<Triple<L, M, R>>
+{
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public int compare(final Triple<L, M, R> o1, final Triple<L, M, R> o2)
+	{
+		return new CompareToBuilder().append(o1.getLeft(), o2.getLeft())
+			.append(o1.getMiddle(), o2.getMiddle()).append(o1.getRight(), o2.getRight())
+			.toComparison();
+	}
+
+}

src/test/java/de/alpharogroup/collection/comparators/TripleComparatorTest.java

@@ -0,0 +1,85 @@
+/**
+ * The MIT License
+ *
+ * Copyright (C) 2015 Asterios Raptis
+ *
+ * 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 de.alpharogroup.collection.comparators;
+
+import static org.testng.AssertJUnit.assertTrue;
+
+import org.meanbean.test.BeanTester;
+import org.testng.annotations.Test;
+
+import de.alpharogroup.collections.pairs.Triple;
+import de.alpharogroup.test.objects.Customer;
+import de.alpharogroup.test.objects.Employee;
+import de.alpharogroup.test.objects.Person;
+
+/**
+ * The unit test class for the class {@link TripleComparator}.
+ */
+public class TripleComparatorTest
+{
+
+	/** For use of the result of the comparator. */
+	int actual;
+
+	/** For use of the expected result. */
+	boolean expected;
+
+	/**
+	 * Test method for {@link TripleComparator#compare(Object, Object)}
+	 */
+	@Test
+	public final void testCompare()
+	{
+
+		final Person person = Person.builder().name("John").married(Boolean.FALSE).build();
+
+		final Employee employee = Employee.builder().id("20").person(person).build();
+
+		Customer customer = Customer.builder().build();
+
+		Triple<Person, Employee, Customer> o1 = Triple.<Person, Employee, Customer> builder()
+			.left(person).middle(employee).right(customer).build();
+
+		Triple<Person, Employee, Customer> o2 = Triple.<Person, Employee, Customer> builder()
+			.left(person).middle(employee).right(customer).build();
+
+		TripleComparator<Person, Employee, Customer> comparator = new TripleComparator<>();
+
+		actual = comparator.compare(o1, o2);
+		expected = actual == 0;
+		assertTrue(expected);
+	}
+
+	/**
+	 * Test method for {@link TripleComparator}
+	 */
+	@Test
+	public void testWithBeanTester()
+	{
+		final BeanTester beanTester = new BeanTester();
+		beanTester.testBean(TripleComparator.class);
+	}
+
+}