Remove runtime dependency on maven-artifact

This was primarily being used to check the Java version to handle < Java 7 in a different way for date formatting, but since Java 8 is the minimum version at this point it is no longer necessary. Also ends up removing the transitive dependency on commons lang which had minimal usage but replaced with an internal StringUtils equivalent.

Author: ryanrupp

api/pom.xml

@@ -92,11 +92,6 @@
             <artifactId>java-jwt</artifactId>
             <version>4.4.0</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.maven</groupId>
-            <artifactId>maven-artifact</artifactId>
-            <version>3.9.6</version>
-        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>

api/src/main/java/com/messagebird/MessageBirdServiceImpl.java

@@ -8,7 +8,6 @@
 import com.messagebird.exceptions.UnauthorizedException;
 import com.messagebird.objects.ErrorReport;
 import com.messagebird.objects.PagedPaging;
-import org.apache.maven.artifact.versioning.ComparableVersion;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -62,7 +61,7 @@ public class MessageBirdServiceImpl implements MessageBirdService {
     private static final String[] PROTOCOL_LISTS = new String[]{"http://", "https://"};
     private static final List<String> PROTOCOLS = Arrays.asList(PROTOCOL_LISTS);
 
-    private static final ComparableVersion JAVA_VERSION = getJavaVersion();
+    private static final String JAVA_VERSION = getJavaVersion();
 
     // Indicates whether we've overridden HttpURLConnection's behaviour to
     // allow PATCH requests yet. Also see docs on allowPatchRequestsIfNeeded().
@@ -89,13 +88,9 @@ public MessageBirdServiceImpl(final String accessKey, final String serviceUrl) {
 
     }
 
-    private static ComparableVersion getJavaVersion() {
-        try {
-            String version = System.getProperty("java.version");
-            return new ComparableVersion(version);
-        } catch (IllegalArgumentException e) {
-            return new ComparableVersion("0.0");
-        }
+    private static String getJavaVersion() {
+        String version = System.getProperty("java.version");
+        return version != null ? version : "0.0";
     }
 
     private String determineUserAgentString() {
@@ -637,11 +632,7 @@ private void setAdditionalHeaders(HttpURLConnection connection, Map<String, Stri
     }
 
     private DateFormat getDateFormat() {
-        ComparableVersion java6 = new ComparableVersion("1.6");
-        if (JAVA_VERSION.compareTo(java6) > 0) {
-            return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
-        }
-        return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZZZ");
+        return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
     }
 
     /**

api/src/main/java/com/messagebird/common/StringUtils.java

@@ -0,0 +1,12 @@
+package com.messagebird.common;
+
+public class StringUtils {
+
+    private StringUtils() {
+        // static utility
+    }
+
+    public static boolean isBlank(String text) {
+        return text == null || text.trim().isEmpty();
+    }
+}

api/src/main/java/com/messagebird/objects/conversations/MessageParam.java

@@ -1,7 +1,7 @@
 package com.messagebird.objects.conversations;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
-import org.apache.commons.lang3.StringUtils;
+import com.messagebird.common.StringUtils;
 
 public class MessageParam {
 

api/src/main/java/com/messagebird/objects/integrations/HSMComponent.java

@@ -1,7 +1,7 @@
 package com.messagebird.objects.integrations;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
-import org.apache.commons.lang3.StringUtils;
+import com.messagebird.common.StringUtils;
 
 import java.util.List;