Migration of the pdf library to Gradle

java/libraries/pdf/build.gradle.kts

@@ -1 +1,39 @@
-ant.importBuild("build.xml")
+plugins{
+    java
+}
+
+sourceSets {
+    main {
+        java {
+            srcDirs("src")
+        }
+    }
+}
+repositories{
+    mavenCentral()
+    maven("https://jogamp.org/deployment/maven/")
+}
+
+dependencies{
+    compileOnly(project(":core"))
+
+    implementation("com.lowagie:itext:2.1.7")
+}
+
+tasks.register<Copy>("createLibrary"){
+    dependsOn("jar")
+    into(layout.buildDirectory.dir("library"))
+
+    from(layout.projectDirectory){
+        include ("library.properties")
+        include("examples/**")
+    }
+
+    from(configurations.runtimeClasspath){
+        into("library")
+    }
+
+    from(tasks.jar) {
+        into("library")
+    }
+}