From d52bb494e113a545faaf657d81531ae6c9fa0f7e Mon Sep 17 00:00:00 2001
From: Jordan Simpson <jordan.simpson.dev@gmail.com>
Date: Sat, 25 Jul 2020 11:41:20 -0500
Subject: [PATCH 1/2] Added project hierarchy to exemplify the <optional> tag.

---
 maven-modules/optional-dependencies/README.md |  3 +++
 .../main-project/pom.xml                      | 18 ++++++++++++++++++
 .../optional-project/pom.xml                  | 10 ++++++++++
 maven-modules/optional-dependencies/pom.xml   | 18 ++++++++++++++++++
 .../project-with-optionals/pom.xml            | 19 +++++++++++++++++++
 maven-modules/pom.xml                         |  1 +
 6 files changed, 69 insertions(+)
 create mode 100644 maven-modules/optional-dependencies/README.md
 create mode 100644 maven-modules/optional-dependencies/main-project/pom.xml
 create mode 100644 maven-modules/optional-dependencies/optional-project/pom.xml
 create mode 100644 maven-modules/optional-dependencies/pom.xml
 create mode 100644 maven-modules/optional-dependencies/project-with-optionals/pom.xml

diff --git a/maven-modules/optional-dependencies/README.md b/maven-modules/optional-dependencies/README.md
new file mode 100644
index 0000000000..6b4d3e7647
--- /dev/null
+++ b/maven-modules/optional-dependencies/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- Optional Dependency in Maven
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/main-project/pom.xml b/maven-modules/optional-dependencies/main-project/pom.xml
new file mode 100644
index 0000000000..6a42683779
--- /dev/null
+++ b/maven-modules/optional-dependencies/main-project/pom.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>main-project</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>project-with-optionals</artifactId>
+            <version>0.0.1-SNAPSHOT</version>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/optional-project/pom.xml b/maven-modules/optional-dependencies/optional-project/pom.xml
new file mode 100644
index 0000000000..9ad4376c8d
--- /dev/null
+++ b/maven-modules/optional-dependencies/optional-project/pom.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>optional-project</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>pom</packaging>
+</project>
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/pom.xml b/maven-modules/optional-dependencies/pom.xml
new file mode 100644
index 0000000000..c1bfc6fb59
--- /dev/null
+++ b/maven-modules/optional-dependencies/pom.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>maven-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>optional-dependencies</artifactId>
+    <modules>
+        <module>optional-project</module>
+        <module>project-with-optionals</module>
+        <module>main-project</module>
+    </modules>
+</project>
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/project-with-optionals/pom.xml b/maven-modules/optional-dependencies/project-with-optionals/pom.xml
new file mode 100644
index 0000000000..6a14f3260d
--- /dev/null
+++ b/maven-modules/optional-dependencies/project-with-optionals/pom.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>project-with-optionals</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>optional-project</artifactId>
+            <version>0.0.1-SNAPSHOT</version>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/maven-modules/pom.xml b/maven-modules/pom.xml
index 528f44bddc..86a7d5756c 100644
--- a/maven-modules/pom.xml
+++ b/maven-modules/pom.xml
@@ -26,6 +26,7 @@
         <module>maven-properties</module>
         <module>versions-maven-plugin</module>
         <module>version-collision</module>
+        <module>optional-dependencies</module>
     </modules>
 
 </project>

From 4367410910e05cf1ad513bff1f720b6d55069eb3 Mon Sep 17 00:00:00 2001
From: Jordan Simpson <jordan.simpson.dev@gmail.com>
Date: Wed, 5 Aug 2020 10:47:13 -0500
Subject: [PATCH 2/2] Added pom packaging to module's pom

---
 maven-modules/optional-dependencies/pom.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/maven-modules/optional-dependencies/pom.xml b/maven-modules/optional-dependencies/pom.xml
index c1bfc6fb59..12d028b2d7 100644
--- a/maven-modules/optional-dependencies/pom.xml
+++ b/maven-modules/optional-dependencies/pom.xml
@@ -10,6 +10,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>optional-dependencies</artifactId>
+    <packaging>pom</packaging>
     <modules>
         <module>optional-project</module>
         <module>project-with-optionals</module>