enforce specific code formatter settings

build.gradle

@@ -1,4 +1,5 @@
 import org.gradle.plugins.ide.eclipse.model.AccessRule
+import org.apache.tools.ant.filters.ReplaceTokens
 
 //apply plugin: 'java'
 apply plugin: 'eclipse'
@@ -18,6 +19,8 @@ buildscript {
 }
 
 ext {
+
+    javaVersion=12
     
     version_log4j2= '2.12.1'
     version_spring = '2.2.1.RELEASE'
@@ -61,7 +64,7 @@ subprojects {
 	compileJava.options.encoding = 'UTF-8'
 
 	// java compatibility version
-	sourceCompatibility = 12
+	sourceCompatibility = javaVersion
 	
 	configurations {
 		tests
@@ -93,7 +96,7 @@ subprojects {
    task eclipseSettings(type: Copy) {
       from ("${rootProject.projectDir}/eclipse/") {
           include '**/*.prefs'
-          //filter(ReplaceTokens, tokens: [rootProjectDir: "${rootProject.projectDir}".toString().replaceAll('\\\\', '/')])
+          filter(ReplaceTokens, tokens: [javaVersion: "${rootProject.javaVersion}".toString()])
       }
       into "${project.projectDir}/.settings/"
   }