From c3234b623479a675ef869bddfc83318373539ac7 Mon Sep 17 00:00:00 2001
From: jaewohong <jaewohong@phoenixdarts.com>
Date: Fri, 2 Jan 2026 09:29:46 +0900
Subject: [PATCH] =?UTF-8?q?header=20relay=EC=9C=84=ED=95=9C=20Concat=20use?=
 =?UTF-8?q?r=20function=EC=B6=94=EA=B0=80?=
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---
 .../transformer/function/generic/Concat.java  | 37 +++++++++++++++++++
 .../transformer/function/generic/Trim.java    |  4 +-
 .../function/validate/isBlank.java            | 31 ++++++++++++++++
 .../eai/transformer/ConcatFunction.java       |  5 ++-
 4 files changed, 74 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/com/eactive/eai/transformer/function/generic/Concat.java
 create mode 100644 src/main/java/com/eactive/eai/transformer/function/validate/isBlank.java

diff --git a/src/main/java/com/eactive/eai/transformer/function/generic/Concat.java b/src/main/java/com/eactive/eai/transformer/function/generic/Concat.java
new file mode 100644
index 0000000..0613c7c
--- /dev/null
+++ b/src/main/java/com/eactive/eai/transformer/function/generic/Concat.java
@@ -0,0 +1,37 @@
+package com.eactive.eai.transformer.function.generic;
+
+import java.util.Stack;
+
+import org.apache.commons.lang3.StringUtils;
+import org.nfunk.jep.ParseException;
+import org.nfunk.jep.function.PostfixMathCommand;
+
+public class Concat extends PostfixMathCommand {
+	public Concat() {
+		numberOfParameters = 2;
+	}
+
+	public void run(Stack inStack) throws ParseException {
+
+		checkStack(inStack);
+
+		Object p2 = inStack.pop();
+
+		if (p2 instanceof String) {
+			String str2 = (String) p2;
+			Object p1 = inStack.pop();
+
+			if (p1 instanceof String) {
+				String str1 = (String) p1;
+
+				inStack.push(str1 + str2);
+
+			} else {
+				throw new ParseException("Invalid parameter type, p1 is not string");
+			}
+		} else {
+			throw new ParseException("Invalid parameter type, p2 is not string");
+		}
+
+	}
+}
diff --git a/src/main/java/com/eactive/eai/transformer/function/generic/Trim.java b/src/main/java/com/eactive/eai/transformer/function/generic/Trim.java
index d7aaf58..c2934fb 100644
--- a/src/main/java/com/eactive/eai/transformer/function/generic/Trim.java
+++ b/src/main/java/com/eactive/eai/transformer/function/generic/Trim.java
@@ -8,13 +8,15 @@ import org.nfunk.jep.function.PostfixMathCommand;
 
 public class Trim extends PostfixMathCommand {
     public Trim() {
-        numberOfParameters = 1;
+        numberOfParameters = 2;
     }
 
     public void run(Stack inStack) throws ParseException {
         checkStack(inStack);
 
         Object p1 = inStack.pop();
+        
+        Object p2 = inStack.pop();
 
         if (p1 instanceof byte[]) {
             inStack.push(new String((byte[]) p1).trim());
diff --git a/src/main/java/com/eactive/eai/transformer/function/validate/isBlank.java b/src/main/java/com/eactive/eai/transformer/function/validate/isBlank.java
new file mode 100644
index 0000000..1ec0d46
--- /dev/null
+++ b/src/main/java/com/eactive/eai/transformer/function/validate/isBlank.java
@@ -0,0 +1,31 @@
+package com.eactive.eai.transformer.function.validate;
+
+import java.util.Stack;
+
+import org.apache.commons.lang3.StringUtils;
+import org.nfunk.jep.ParseException;
+import org.nfunk.jep.function.PostfixMathCommand;
+
+public class isBlank extends PostfixMathCommand {
+
+	public isBlank() {
+		numberOfParameters = 1;
+	}
+
+	public void run(Stack inStack) throws ParseException {
+
+		checkStack(inStack);
+
+		Object p1 = inStack.pop();
+
+		if (p1 instanceof String) {
+			String str1 = (String) p1;
+
+			inStack.push(StringUtils.isBlank(str1));
+
+		} else {
+			throw new ParseException("Invalid parameter type, p1 is not string");
+		}
+	}
+
+}
diff --git a/src/test/java/com/eactive/eai/transformer/ConcatFunction.java b/src/test/java/com/eactive/eai/transformer/ConcatFunction.java
index 9663b3a..1411dfc 100644
--- a/src/test/java/com/eactive/eai/transformer/ConcatFunction.java
+++ b/src/test/java/com/eactive/eai/transformer/ConcatFunction.java
@@ -9,7 +9,7 @@ public class ConcatFunction extends PostfixMathCommand {
 	
 	public ConcatFunction() {
         numberOfParameters = 2;
-    }
+    }                                                                                                                                                                                                                                                                                                                                                      
 	
 	public void run(Stack inStack) throws ParseException {
         checkStack(inStack);
@@ -20,5 +20,6 @@ public class ConcatFunction extends PostfixMathCommand {
         String value = param1 + param2;
 
         inStack.push(value);
-    }
+	}
+    
 }