update the latest code

.github/workflows/checkstyle.yml

@@ -0,0 +1,21 @@
+# This workflow will check code formatting with checkstyle
+
+name: COOL checkstyle
+on: [pull_request]
+
+jobs:
+  code-foramtting-check:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Run checkstyle
+      uses: dbelyaev/[email protected]
+      with:
+        checkstyle_config: 'cool-checkstyle.xml'
+        reporter: 'github-pr-review'
+        filter_mode: file
+        level: error
+        fail_on_error: true

.github/workflows/maven.yml

@@ -0,0 +1,23 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: COOL build and test
+
+on: [pull_request]
+
+jobs:
+  ubuntu-jdk8:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up JDK 8
+      uses: actions/setup-java@v3
+      with:
+        java-version: '8'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml

.gitignore

@@ -1,5 +1,10 @@
 # idea
 .idea/
+tree.txt
+*/tree.txt
+
+# vscode
+.vscode
 
 # product
 target/
@@ -15,7 +20,12 @@ dependency-reduced-pom.xml
 */*/*.iml
 
 # dataset source files
+CubeRepo/
 datasetSource/
 
+# log file
+cool.log
+*/cool.log
+
 .DS_Store
 NOTICE