[New] Added Locator.isChildOf(Locator)

- including a new test class

li.strolch.model/src/main/java/li/strolch/model/Locator.java

@@ -222,6 +222,18 @@ public class Locator {
 		return sb.toString();
 	}
 
+	/**
+	 * Returns true if the given locator's path elements is the beginning of this locator's path elements
+	 * 
+	 * @param locator
+	 * @return
+	 */
+	public boolean isChildOf(Locator locator) {
+		if (locator.pathElements.size() >= this.pathElements.size())
+			return false;
+		return this.pathElements.subList(0, locator.pathElements.size()).equals(locator.pathElements);
+	}
+
 	@Override
 	public int hashCode() {
 		final int prime = 31;

li.strolch.model/src/test/java/li/strolch/model/LocatorTest.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2015 Robert von Burg <eitch@eitchnet.ch>
+ * 
+ * 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 li.strolch.model;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+/**
+ * @author Robert von Burg <eitch@eitchnet.ch>
+ */
+public class LocatorTest {
+
+	@Rule
+	public ExpectedException expected = ExpectedException.none();
+
+	@Test
+	public void shouldParse1() {
+		List<String> paths = Arrays.asList("Resource", "MyType", "@myObj");
+		assertEquals(paths, Locator.valueOf("Resource/MyType/@myObj").getPathElements());
+	}
+
+	@Test
+	public void shouldParse2() {
+		List<String> paths = Arrays.asList("Resource", "MyType");
+		assertEquals(paths, Locator.valueOf("Resource/MyType/").getPathElements());
+	}
+
+	@Test
+	public void shouldEqual1() {
+		assertEquals(Locator.valueOf("Resource/MyType/"), Locator.valueOf("Resource/MyType"));
+	}
+
+	@Test
+	public void shouldEqual2() {
+		assertEquals(Locator.valueOf("Resource/MyType/@myObj"), Locator.valueOf("Resource/MyType/@myObj"));
+	}
+
+	@Test
+	public void shouldNotEqual1() {
+		assertNotEquals(Locator.valueOf("Resource/MyType"), Locator.valueOf("Resource/MyType/@myObj"));
+	}
+
+	@Test
+	public void shouldNotEqual2() {
+		assertNotEquals(Locator.valueOf("Resource/MyType/fdfg"), Locator.valueOf("Resource/MyType/@myObj"));
+	}
+
+	@Test
+	public void shouldBeChild1() {
+		Locator parent = Locator.valueOf("Resource/MyType/@myObj");
+		Locator child = Locator.valueOf("Resource/MyType/@myObj/Bags/@bag1/Parameters/@param1");
+		assertTrue(child.isChildOf(parent));
+	}
+
+	@Test
+	public void shouldBeChild2() {
+		Locator parent = Locator.valueOf("Resource/MyType/@myObj");
+		Locator child = Locator.valueOf("Resource/MyType/@myObj/Bags/");
+		assertTrue(child.isChildOf(parent));
+	}
+
+	@Test
+	public void shouldNotBeChild1() {
+		Locator parent = Locator.valueOf("Resource/MyType/@myObj");
+		Locator child = Locator.valueOf("Resource/OtherType/@myObj/Bags/");
+		assertFalse(child.isChildOf(parent));
+	}
+
+	@Test
+	public void shouldNotBeChild2() {
+		Locator parent = Locator.valueOf("Resource/MyType/@myObj");
+		Locator child = Locator.valueOf("Resource/MyType/@myObj");
+		assertFalse(child.isChildOf(parent));
+	}
+}