BAEL-4090: Setup for errors

gradle-5/.gitignore

@@ -0,0 +1 @@
+**/build/**

gradle-5/build.gradle

@@ -6,6 +6,10 @@ description = "Gradle 5 root project"
 allprojects {
     apply plugin :"java"
     apply plugin :"nebula.lint"
+    gradleLint {
+        rules=['unused-dependency']
+        reportFormat = 'text'
+    }
     group = "com.baeldung"
     version = "0.0.1"
     sourceCompatibility = "1.8"

gradle-5/unused-dependencies/build.gradle

@@ -2,11 +2,15 @@
 description = "Gradle Unused Dependencies example"
 
 dependencies {
+    // unused dependency sample
     implementation('com.google.guava:guava:29.0-jre')
+    // indirect dependency sample
+    implementation('org.apache.httpcomponents:httpclient:4.5.12')
+    // webjars sample
+    implementation('org.webjars:jquery:3.1.1')
+    // empty jars
+    implementation('org.codehaus.cargo:empty-jar:1.7.13')
+    // family jar
+    implementation('org.apache.openjpa:openjpa:3.1.1')
     testImplementation('junit:junit:4.12')
 }
-
-gradleLint {
-    rules=['all-dependency']
-    reportFormat = 'text'
-}

gradle-5/unused-dependencies/src/main/java/com/baeldung/unused/UnusedDependencies.java

@@ -1,12 +1,42 @@
 package com.baeldung.unused;
 
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.apache.http.HttpHeaders;
+import org.apache.http.ssl.SSLContextBuilder;
+
+import com.google.common.collect.ImmutableList;
+
 public class UnusedDependencies {
 
     public static void main(String[] args) {
         System.out.println("Hello world");
-        
+        useGuava();
-//        List<String> list = ImmutableList.of("Baledung", "is", "cool");
+        useHttpCore();
-//        System.out.println(list.stream().collect(Collectors.joining(" ")));
+        useHttpClientWithReflection();
     }
 
+    private static void useGuava() {
+        List<String> list = ImmutableList.of("Baledung", "is", "cool");
+        System.out.println(list.stream()
+            .collect(Collectors.joining(" ")));
+    }
+
+    private static void useHttpCore() {
+        SSLContextBuilder.create();
+        // does not trigger the direct dep violation
+        System.out.println(HttpHeaders.ACCEPT);
+    }
+
+    private static void useHttpClientWithReflection() {
+        try {
+            Class<?> httpBuilder = Class.forName("org.apache.http.impl.client.HttpClientBuilder");
+            Method create = httpBuilder.getMethod("create", null);
+            create.invoke(httpBuilder, null);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
 }