Remove guava dependency (#17)

* Remove guava dependency

* Add extra test for dir path

* Update version

---------

Co-authored-by: Bartosz Litwiniuk <>

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Backtrace Java Release Notes
 
+## Version 0.9.7 - 05.07.2023
+- Remove 'com.google.guava:guava' library
+
 ## Version 0.9.6 - 24.05.2023
 - Update dependencies (GSON and slf4j-api)
 

build.gradle

@@ -6,7 +6,7 @@ plugins {
 apply from: 'publish.gradle'
 
 group = 'com.github.backtrace.io'
-version = '0.9.6'
+version = '0.9.7'
 
 repositories {
     mavenCentral()
@@ -18,8 +18,6 @@ test {
 
 dependencies {
     implementation 'com.google.code.gson:gson:2.10.1'
-    // This dependency is used internally, and not exposed to consumers on their own compile classpath.
-    implementation 'com.google.guava:guava:31.1-jre'
     implementation group: 'org.slf4j', name: 'slf4j-api', version: '2.0.7'
     // Use JUnit test framework
     testImplementation 'junit:junit:4.13.2'

gradle.properties

@@ -1,4 +1,4 @@
-VERSION_NAME=0.9.6
+VERSION_NAME=0.9.7
 
 GROUP=com.github.backtrace-labs.backtrace-java
 

src/main/java/backtrace/io/database/BacktraceDatabase.java

@@ -5,7 +5,6 @@
 import backtrace.io.data.BacktraceData;
 import backtrace.io.data.BacktraceReport;
 import backtrace.io.helpers.FileHelper;
-import com.google.common.io.Files;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -124,7 +123,7 @@ private List<File> getDatabaseFiles() {
         List<File> databaseFiles = new ArrayList<>();
 
         for (final File f : files) {
-            String extension = Files.getFileExtension(f.getAbsolutePath());
+            String extension = FileHelper.getFileExtension(f);
 
             if (!fileExtension.equals(extension)) {
                 LOGGER.warn(String.format("File extension (%s) in database directory does not match to database files extension (%s)", fileExtension, extension));

src/main/java/backtrace/io/helpers/FileHelper.java

@@ -8,7 +8,6 @@
 import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
-
 /**
  * Helper class for access to files
  */
@@ -95,4 +94,13 @@ public int compare(File o1, File o2) {
         };
     }
 
+    public static String getFileExtension(File file) {
+        final String name = file.getName();
+        final int lastIndexOf = name.lastIndexOf(".");
+        if (lastIndexOf == -1) {
+            return ""; // empty extension
+        }
+        return name.substring(lastIndexOf + 1);
+    }
+
 }

src/test/java/backtrace/io/FileHelperTest.java

@@ -63,4 +63,64 @@ public void removeIncorrectPaths() {
         Assert.assertEquals(1, attachments.size());
         Assert.assertEquals(this.absolutePath, attachments.get(0));
     }
+
+    @Test
+    public void verifyCorrectPathExtension() {
+        // GIVEN
+        File sampleFile = new File("./test-dir/file.txt");
+
+        // WHEN
+        String result = FileHelper.getFileExtension(sampleFile);
+
+        // THEN
+        Assert.assertEquals("txt", result);
+    }
+
+    @Test
+    public void verifyCorrectPathMultipleDotsExtension() {
+        // GIVEN
+        File sampleFile = new File("./test-dir/file.test.txt.pdf");
+
+        // WHEN
+        String result = FileHelper.getFileExtension(sampleFile);
+
+        // THEN
+        Assert.assertEquals("pdf", result);
+    }
+
+    @Test
+    public void verifyEmptyExtension() {
+        // GIVEN
+        File sampleFile = new File("./test-dir/file");
+
+        // WHEN
+        String result = FileHelper.getFileExtension(sampleFile);
+
+        // THEN
+        Assert.assertEquals("", result);
+    }
+
+    @Test
+    public void verifyDirPath() {
+        // GIVEN
+        File sampleFile = new File("./test-dir");
+
+        // WHEN
+        String result = FileHelper.getFileExtension(sampleFile);
+
+        // THEN
+        Assert.assertEquals("", result);
+    }
+
+    @Test
+    public void verifyEmptyString() {
+        // GIVEN
+        File sampleFile = new File("");
+
+        // WHEN
+        String result = FileHelper.getFileExtension(sampleFile);
+
+        // THEN
+        Assert.assertEquals("", result);
+    }
 }