Add Guava again

will-molloy · will-molloy · commit 194c203bd120 · 2025-05-21T11:04:48.000+12:00
Java still doesnt' have pre-conditions?
diff --git a/example-java/build.gradle.kts b/example-java/build.gradle.kts
@@ -10,4 +10,5 @@ dependencies {
   implementation(rootProject.libs.log4j.core)
   implementation(rootProject.libs.log4j.api)
   implementation(rootProject.libs.log4j.slf4j2)
+  implementation(rootProject.libs.guava)
 }
diff --git a/example-java/src/main/java/com/willmolloy/HelloJava.java b/example-java/src/main/java/com/willmolloy/HelloJava.java
@@ -1,5 +1,7 @@
 package com.willmolloy;
 
+import static com.google.common.base.Preconditions.checkArgument;
+
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -12,6 +14,7 @@ final class HelloJava {
   private static final Logger log = LogManager.getLogger();
 
   String hello(String text) {
+    checkArgument(!text.isEmpty());
     log.debug("Hello {}!", text);
     return "Hello %s!".formatted(text);
   }
diff --git a/example-kotlin/src/main/kotlin/com/willmolloy/HelloKotlin.kt b/example-kotlin/src/main/kotlin/com/willmolloy/HelloKotlin.kt
@@ -3,5 +3,8 @@ package com.willmolloy
 /** Example main src. */
 object HelloKotlin {
 
-  fun hello(text: String): String = "Hello $text, from Kotlin!"
+  fun hello(text: String): String {
+    require(text.isNotEmpty())
+    return "Hello $text, from Kotlin!"
+  }
 }
diff --git a/example-scala/src/main/scala/com/willmolloy/HelloScala.scala b/example-scala/src/main/scala/com/willmolloy/HelloScala.scala
@@ -3,5 +3,8 @@ package com.willmolloy
 /** Example main src. */
 object HelloScala {
 
-  def hello(text: String): String = s"Hello $text, from Scala!"
+  def hello(text: String): String = {
+    require(text.nonEmpty)
+    s"Hello $text, from Scala!"
+  }
 }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -7,6 +7,7 @@ testsets = { id = "org.unbroken-dome.test-sets", version = "4.1.0" }
 [versions]
 spotbugs = "4.9.1"
 log4j = "2.24.3"
+guava = "33.4.0-jre"
 # test libs
 junit = "5.11.4"
 truth = "1.4.4"
@@ -20,6 +21,7 @@ spotbugs-annotations = { module = "com.github.spotbugs:spotbugs-annotations", ve
 log4j-core = { module = "org.apache.logging.log4j:log4j-core", version.ref = "log4j" }
 log4j-api = { module = "org.apache.logging.log4j:log4j-api", version.ref = "log4j" }
 log4j-slf4j2 = { module = "org.apache.logging.log4j:log4j-slf4j2-impl", version.ref = "log4j" }
+guava = { module = "com.google.guava:guava", version.ref = "guava" }
 # test libs
 junit = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit" }
 truth = { module = "com.google.truth:truth", version.ref = "truth" }

Original file line number	Diff line number	Diff line change
`@@ -10,4 +10,5 @@ dependencies {`
`10`	`10`	`implementation(rootProject.libs.log4j.core)`
`11`	`11`	`implementation(rootProject.libs.log4j.api)`
`12`	`12`	`implementation(rootProject.libs.log4j.slf4j2)`
	`13`	`+ implementation(rootProject.libs.guava)`
`13`	`14`	`}`
Original file line number	Diff line number	Diff line change
`@@ -3,5 +3,8 @@ package com.willmolloy`
`3`	`3`	`/** Example main src. */`
`4`	`4`	`object HelloKotlin {`
`5`	`5`
`6`		`- fun hello(text: String): String = "Hello $text, from Kotlin!"`
	`6`	`+ fun hello(text: String): String {`
	`7`	`+ require(text.isNotEmpty())`
	`8`	`+ return "Hello $text, from Kotlin!"`
	`9`	`+ }`
`7`	`10`	`}`
Original file line number	Diff line number	Diff line change
`@@ -3,5 +3,8 @@ package com.willmolloy`
`3`	`3`	`/** Example main src. */`
`4`	`4`	`object HelloScala {`
`5`	`5`
`6`		`- def hello(text: String): String = s"Hello $text, from Scala!"`
	`6`	`+ def hello(text: String): String = {`
	`7`	`+ require(text.nonEmpty)`
	`8`	`+ s"Hello $text, from Scala!"`
	`9`	`+ }`
`7`	`10`	`}`