Merge pull request #9916 from bjornlindstrom:gh-9713

* pr/9916:
  Polish "Fix handling of empty/null arguments"
  Fix handling of empty/null arguments

Author: snicoll

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RunArguments.java

@@ -18,6 +18,7 @@
 
 import java.util.Arrays;
 import java.util.LinkedList;
+import java.util.Objects;
 
 import org.codehaus.plexus.util.cli.CommandLineUtils;
 
@@ -31,14 +32,16 @@ class RunArguments {
 
 	private static final String[] NO_ARGS = {};
 
-	private final LinkedList<String> args;
+	private final LinkedList<String> args = new LinkedList<>();
 
 	RunArguments(String arguments) {
 		this(parseArgs(arguments));
 	}
 
 	RunArguments(String[] args) {
-		this.args = new LinkedList<>(Arrays.asList(args));
+		if (args != null) {
+			Arrays.stream(args).filter(Objects::nonNull).forEach(this.args::add);
+		}
 	}
 
 	public LinkedList<String> getArgs() {

spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/RunArgumentsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,6 +34,27 @@ public void parseNull() {
 		assertThat(args.length).isEqualTo(0);
 	}
 
+	@Test
+	public void parseNullArray() {
+		String[] args = new RunArguments((String[]) null).asArray();
+		assertThat(args).isNotNull();
+		assertThat(args.length).isEqualTo(0);
+	}
+
+	@Test
+	public void parseArrayContainingNullValue() {
+		String[] args = new RunArguments(new String[]{"foo", null, "bar"}).asArray();
+		assertThat(args).isNotNull();
+		assertThat(args).containsOnly("foo", "bar");
+	}
+
+	@Test
+	public void parseArrayContainingEmptyValue() {
+		String[] args = new RunArguments(new String[]{"foo", "", "bar"}).asArray();
+		assertThat(args).isNotNull();
+		assertThat(args).containsOnly("foo", "", "bar");
+	}
+
 	@Test
 	public void parseEmpty() {
 		String[] args = parseArgs("   ");