header relay위한 Concat user function추가

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");
+		}
+
+	}
+}

src/main/java/com/eactive/eai/transformer/function/generic/Trim.java

@@ -8,7 +8,7 @@ import org.nfunk.jep.function.PostfixMathCommand;
 
 public class Trim extends PostfixMathCommand {
     public Trim() {
-        numberOfParameters = 1;
+        numberOfParameters = 2;
     }
 
     public void run(Stack inStack) throws ParseException {
@@ -16,6 +16,8 @@ public class Trim extends PostfixMathCommand {
 
         Object p1 = inStack.pop();
         
+        Object p2 = inStack.pop();
+
         if (p1 instanceof byte[]) {
             inStack.push(new String((byte[]) p1).trim());
         } else if (p1 instanceof String) {

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");
+		}
+	}
+
+}

src/test/java/com/eactive/eai/transformer/ConcatFunction.java

@@ -21,4 +21,5 @@ public class ConcatFunction extends PostfixMathCommand {
 
         inStack.push(value);
 	}
+    
 }