eugenp · anastasiosioannidis · Jun 19, 2025 · Jun 6, 2025
diff --git a/patterns-modules/design-patterns-structural-2/pom.xml b/patterns-modules/design-patterns-structural-2/pom.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>design-patterns-structural-2</artifactId>
+    <version>1.0</version>
+    <name>design-patterns-structural-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>patterns-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/...c/main/java/com/baeldung/bridge/Blue.java → ...c/main/java/com/baeldung/bridge/Blue.java b/...c/main/java/com/baeldung/bridge/Blue.java → ...c/main/java/com/baeldung/bridge/Blue.java
diff --git a/.../baeldung/bridge/BridgePatternDriver.java → .../baeldung/bridge/BridgePatternDriver.java b/.../baeldung/bridge/BridgePatternDriver.java → .../baeldung/bridge/BridgePatternDriver.java
diff --git a/.../main/java/com/baeldung/bridge/Color.java → .../main/java/com/baeldung/bridge/Color.java b/.../main/java/com/baeldung/bridge/Color.java → .../main/java/com/baeldung/bridge/Color.java
diff --git a/...rc/main/java/com/baeldung/bridge/Red.java → ...rc/main/java/com/baeldung/bridge/Red.java b/...rc/main/java/com/baeldung/bridge/Red.java → ...rc/main/java/com/baeldung/bridge/Red.java
diff --git a/.../main/java/com/baeldung/bridge/Shape.java → .../main/java/com/baeldung/bridge/Shape.java b/.../main/java/com/baeldung/bridge/Shape.java → .../main/java/com/baeldung/bridge/Shape.java
diff --git a/...main/java/com/baeldung/bridge/Square.java → ...main/java/com/baeldung/bridge/Square.java b/...main/java/com/baeldung/bridge/Square.java → ...main/java/com/baeldung/bridge/Square.java
diff --git a/...in/java/com/baeldung/bridge/Triangle.java → ...in/java/com/baeldung/bridge/Triangle.java b/...in/java/com/baeldung/bridge/Triangle.java → ...in/java/com/baeldung/bridge/Triangle.java
diff --git a/...com/baeldung/composite/CompositeDemo.java → ...com/baeldung/composite/CompositeDemo.java b/...com/baeldung/composite/CompositeDemo.java → ...com/baeldung/composite/CompositeDemo.java
diff --git a/...va/com/baeldung/composite/Department.java → ...va/com/baeldung/composite/Department.java b/...va/com/baeldung/composite/Department.java → ...va/com/baeldung/composite/Department.java
diff --git a/...eldung/composite/FinancialDepartment.java → ...eldung/composite/FinancialDepartment.java b/...eldung/composite/FinancialDepartment.java → ...eldung/composite/FinancialDepartment.java
diff --git a/...om/baeldung/composite/HeadDepartment.java → ...om/baeldung/composite/HeadDepartment.java b/...om/baeldung/composite/HeadDepartment.java → ...om/baeldung/composite/HeadDepartment.java
diff --git a/...m/baeldung/composite/SalesDepartment.java → ...m/baeldung/composite/SalesDepartment.java b/...m/baeldung/composite/SalesDepartment.java → ...m/baeldung/composite/SalesDepartment.java
diff --git a/...com/baeldung/pipeline/immutable/Pipe.java → ...com/baeldung/pipeline/immutable/Pipe.java b/...com/baeldung/pipeline/immutable/Pipe.java → ...com/baeldung/pipeline/immutable/Pipe.java
diff --git a/...baeldung/pipeline/immutable/Pipeline.java → ...baeldung/pipeline/immutable/Pipeline.java b/...baeldung/pipeline/immutable/Pipeline.java → ...baeldung/pipeline/immutable/Pipeline.java
diff --git a/...ava/com/baeldung/pipeline/pipes/Pipe.java → ...ava/com/baeldung/pipeline/pipes/Pipe.java b/...ava/com/baeldung/pipeline/pipes/Pipe.java → ...ava/com/baeldung/pipeline/pipes/Pipe.java
diff --git a/...a/com/baeldung/proxy/ExpensiveObject.java → ...a/com/baeldung/proxy/ExpensiveObject.java b/...a/com/baeldung/proxy/ExpensiveObject.java → ...a/com/baeldung/proxy/ExpensiveObject.java
diff --git a/...m/baeldung/proxy/ExpensiveObjectImpl.java → ...m/baeldung/proxy/ExpensiveObjectImpl.java b/...m/baeldung/proxy/ExpensiveObjectImpl.java → ...m/baeldung/proxy/ExpensiveObjectImpl.java
diff --git a/.../baeldung/proxy/ExpensiveObjectProxy.java → .../baeldung/proxy/ExpensiveObjectProxy.java b/.../baeldung/proxy/ExpensiveObjectProxy.java → .../baeldung/proxy/ExpensiveObjectProxy.java
diff --git a/...om/baeldung/proxy/ProxyPatternDriver.java → ...om/baeldung/proxy/ProxyPatternDriver.java b/...om/baeldung/proxy/ProxyPatternDriver.java → ...om/baeldung/proxy/ProxyPatternDriver.java
diff --git a/...erns-modules/design-patterns-structural-2/src/main/java/com/baeldung/util/LoggerUtil.java b/...erns-modules/design-patterns-structural-2/src/main/java/com/baeldung/util/LoggerUtil.java
@@ -0,0 +1,35 @@
+package com.baeldung.util;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Properties;
+
+import org.apache.log4j.Logger;
+import org.apache.log4j.PropertyConfigurator;
+
+public class LoggerUtil {
+
+    public final static Logger LOG = Logger.getLogger("GLOBAL");
+
+    static {
+    	configuration();
+    }
+
+    private static void configuration() {
+    	Properties props = new Properties();
+    	try {
+			props.load(
+			  new BufferedReader(
+			    new InputStreamReader(
+			      LoggerUtil.class.getResourceAsStream("/log4jstructuraldp.properties")
+			    )
+			  )
+			);
+		} catch (IOException e) {
+			System.out.println("log4jstructuraldp.properties file not configured properly");
+			System.exit(0);
+		}
+    	PropertyConfigurator.configure(props);
+    }
+}
diff --git a/...erns-modules/design-patterns-structural-2/src/main/resources/log4jstructuraldp.properties b/...erns-modules/design-patterns-structural-2/src/main/resources/log4jstructuraldp.properties
@@ -0,0 +1,9 @@
+
+# Root logger 
+log4j.rootLogger=INFO, stdout
+
+# Write to console
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.Target=System.out
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
diff --git a/.../bridge/BridgePatternIntegrationTest.java → .../bridge/BridgePatternIntegrationTest.java b/.../bridge/BridgePatternIntegrationTest.java → .../bridge/BridgePatternIntegrationTest.java
diff --git a/.../pipeline/BiFunctionPipelineUnitTest.java → .../pipeline/BiFunctionPipelineUnitTest.java b/.../pipeline/BiFunctionPipelineUnitTest.java → .../pipeline/BiFunctionPipelineUnitTest.java
@@ -1,9 +1,10 @@
 package com.baeldung.pipeline;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.function.BiFunction;
 import java.util.function.Function;
+
 import org.junit.jupiter.api.Test;
 
 class BiFunctionPipelineUnitTest {

diff --git a/...ng/pipeline/FunctionPipelineUnitTest.java → ...ng/pipeline/FunctionPipelineUnitTest.java b/...ng/pipeline/FunctionPipelineUnitTest.java → ...ng/pipeline/FunctionPipelineUnitTest.java
@@ -1,8 +1,9 @@
 package com.baeldung.pipeline;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.function.Function;
+
 import org.junit.jupiter.api.Test;
 
 class FunctionPipelineUnitTest {

diff --git a/...a/com/baeldung/pipeline/PipeUnitTest.java → ...a/com/baeldung/pipeline/PipeUnitTest.java b/...a/com/baeldung/pipeline/PipeUnitTest.java → ...a/com/baeldung/pipeline/PipeUnitTest.java
@@ -2,9 +2,10 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import com.baeldung.pipeline.pipes.Pipe;
 import org.junit.jupiter.api.Test;
 
+import com.baeldung.pipeline.pipes.Pipe;
+
 class PipeUnitTest {
 
     @Test

diff --git a/...m/baeldung/pipeline/PipelineUnitTest.java → ...m/baeldung/pipeline/PipelineUnitTest.java b/...m/baeldung/pipeline/PipelineUnitTest.java → ...m/baeldung/pipeline/PipelineUnitTest.java
@@ -2,9 +2,10 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import org.junit.jupiter.api.Test;
+
 import com.baeldung.pipeline.immutable.Pipe;
 import com.baeldung.pipeline.immutable.Pipeline;
-import org.junit.jupiter.api.Test;
 
 class PipelineUnitTest {
 

diff --git a/...ng/proxy/ProxyPatternIntegrationTest.java → ...ng/proxy/ProxyPatternIntegrationTest.java b/...ng/proxy/ProxyPatternIntegrationTest.java → ...ng/proxy/ProxyPatternIntegrationTest.java
diff --git a/...va/com/baeldung/proxy/TestAppenderDP.java → ...va/com/baeldung/proxy/TestAppenderDP.java b/...va/com/baeldung/proxy/TestAppenderDP.java → ...va/com/baeldung/proxy/TestAppenderDP.java
diff --git a/patterns-modules/pom.xml b/patterns-modules/pom.xml
@@ -29,6 +29,7 @@
         <module>design-patterns-functional</module>
         <module>design-patterns-singleton</module>
         <module>design-patterns-structural</module>
+        <module>design-patterns-structural-2</module>
         <module>dependency-inversion</module>
         <module>enterprise-patterns</module>
         <module>front-controller</module>