From c789e82e0e2a63516983edf57a075479324eb7ce Mon Sep 17 00:00:00 2001
From: yunjy-hp <yunjywork@gmail.com>
Date: Thu, 8 Jan 2026 15:13:29 +0900
Subject: [PATCH] =?UTF-8?q?ElinkTransactionContext=EC=97=90=20=EC=B5=9C?=
 =?UTF-8?q?=EC=B4=88=EC=9A=94=EC=B2=AD=EB=8D=B0=EC=9D=B4=ED=84=B0=20?=
 =?UTF-8?q?=EC=A0=80=EC=9E=A5=20=EB=B0=8F=20=EA=B0=80=EC=A0=B8=EB=8B=A4=20?=
 =?UTF-8?q?=EC=93=B0=EB=8A=94=20=ED=95=A8=EC=88=98=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../userdefined/SubStringRequestMessage.java  | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/main/java/com/eactive/eai/custom/transformer/function/userdefined/SubStringRequestMessage.java

diff --git a/src/main/java/com/eactive/eai/custom/transformer/function/userdefined/SubStringRequestMessage.java b/src/main/java/com/eactive/eai/custom/transformer/function/userdefined/SubStringRequestMessage.java
new file mode 100644
index 0000000..b02b4b5
--- /dev/null
+++ b/src/main/java/com/eactive/eai/custom/transformer/function/userdefined/SubStringRequestMessage.java
@@ -0,0 +1,44 @@
+package com.eactive.eai.custom.transformer.function.userdefined;
+
+import com.eactive.eai.common.context.ElinkTransactionContext;
+import org.apache.commons.lang.StringUtils;
+import org.nfunk.jep.ParseException;
+import org.nfunk.jep.function.PostfixMathCommand;
+
+import java.util.Stack;
+
+public class SubStringRequestMessage  extends PostfixMathCommand {
+    public SubStringRequestMessage() {
+        numberOfParameters = -1;
+    }
+
+    public void run(Stack inStack) throws ParseException {
+        checkStack(inStack);
+
+        String bizData = ElinkTransactionContext.getRequestBizData();
+
+        Object p1 = inStack.pop();
+        Object p2 = inStack.pop();
+
+        int start = toInt(p2);
+        int end = toInt(p1);
+
+        String resultStr = bizData.substring(start, end);
+
+        if(inStack.size() > 0){
+            inStack.pop();
+        }
+
+        inStack.push(resultStr);
+    }
+
+    public static int toInt(Object obj) {
+        if (obj instanceof Number) {
+            return ((Number) obj).intValue();
+        }
+        if (obj instanceof String) {
+            return Integer.parseInt(((String) obj).trim());
+        }
+        throw new IllegalArgumentException("Cannot convert to int: " + obj);
+    }
+}