feat: add basic parse for multiple codeblocks

src/main/kotlin/cc/unitmesh/devti/flow/JavaParseUtil.kt

@@ -0,0 +1,10 @@
+package cc.unitmesh.devti.flow
+
+object JavaParseUtil {
+    // split it to 3 parts:
+    fun splitClass(code: String): List<String> {
+        val classPattern = Regex("(public\\s+class|public\\s+interface).*?\\{.*?}", RegexOption.DOT_MATCHES_ALL)
+        val matches = classPattern.findAll(code)
+        return matches.map { it.value }.toList()
+    }
+}

src/test/kotlin/cc/unitmesh/devti/flow/JavaParseUtilTest.kt

@@ -0,0 +1,100 @@
+package cc.unitmesh.devti.flow
+
+import org.junit.Test
+
+class JavaParseUtilTest {
+    val demoCode = """
+// Request DTO
+public class CreateBlogRequest {
+    private String title;
+    private String content;
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}
+
+// Response DTO
+public class CreateBlogResponse {
+    private long id;
+    private String title;
+    private String content;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}
+
+// Entity
+public class BlogPost {
+    private long id;
+    private String title;
+    private String content;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}
+    """.trimIndent()
+
+    @Test
+    fun splitClass() {
+        val classes = JavaParseUtil.splitClass(demoCode)
+        assert(classes.size == 3)
+        assert(classes[0].contains("CreateBlogRequest"))
+        assert(classes[1].contains("CreateBlogResponse"))
+        assert(classes[2].contains("BlogPost"))
+    }
+}