ci: add CI workflow for java sample and fix integration test

Author: juherr

.github/workflows/java-ci.yml

@@ -0,0 +1,42 @@
+name: Java Sample
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  buildTest:
+    name: Build JDK ${{ matrix.java }}
+    runs-on: ubuntu-latest
+    continue-on-error: true # allow jobs to complete even if some fail
+    strategy:
+      matrix:
+        include:
+          - java: 8
+            gradle: 7.6.4
+          - java: 11
+            gradle: 7.6.4
+          - java: 17
+            gradle: 8.9
+          - java: 21
+            gradle: 8.9
+    steps:
+      - name: Setup Maven Action
+        uses: s4u/[email protected]
+        with:
+          checkout-fetch-depth: 0
+          java-version: ${{ matrix.java }}
+          java-distribution: temurin
+      - name: Install latest jsonschema2pojo SNAPSHOT
+        run: ./mvnw -U -B install -DskipTests -Dmaven.javadoc.skip -Dmaven.site.skip
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          gradle-version: ${{ matrix.gradle }}
+      - name: Build projects
+        run: cd jsonschema2pojo-gradle-plugin/example/java && gradle --stacktrace build

jsonschema2pojo-gradle-plugin/pom.xml

@@ -153,6 +153,9 @@
                 <configuration>
                     <useFile>false</useFile>
                     <testSourceDirectory>${integrationTestSourceDirectory}</testSourceDirectory>
+                    <systemPropertyVariables>
+                        <it.gradle.version>${gradle.version}</it.gradle.version>
+                    </systemPropertyVariables>
                 </configuration>
             </plugin>
             <plugin>