Q3

code/Exercise3/AmazingClass.java

@@ -0,0 +1,15 @@
+public class AmazingClass {
+
+
+    public void something() {
+        if(true){
+            while(true){
+                if(true){
+                    if(true){
+                    
+                    }  
+                }  
+            }       
+        }
+    }
+}

code/Exercise5/pom.xml

@@ -0,0 +1,69 @@
+<?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>
+
+    <groupId>fr.istic.vv</groupId>
+    <artifactId>javaparser-starter</artifactId>
+    <version>1.0</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>9</maven.compiler.source>
+        <maven.compiler.target>9</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.github.javaparser</groupId>
+            <artifactId>javaparser-core</artifactId>
+            <version>3.16.2</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <!-- Creates a jar and sets the main class so it can be executed directly wit java -jar .-->
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <mainClass>fr.istic.vv.Main</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+
+            <!-- Creates a jar containing the compiled code and all dependencies. Useful for distribution. -->
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <mainClass>fr.istic.vv.Main</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-my-jar-with-dependencies</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

code/Exercise5/src/main/java/fr/istic/vv/Main.java

@@ -0,0 +1,39 @@
+package fr.istic.vv;
+
+import com.github.javaparser.Problem;
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration;
+import com.github.javaparser.ast.body.MethodDeclaration;
+import com.github.javaparser.ast.visitor.VoidVisitor;
+import com.github.javaparser.ast.visitor.VoidVisitorAdapter;
+import com.github.javaparser.utils.SourceRoot;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        if(args.length == 0) {
+            System.err.println("Should provide the path to the source code");
+            System.exit(1);
+        }
+
+        File file = new File(args[0]);
+        if(!file.exists() || !file.isDirectory() || !file.canRead()) {
+            System.err.println("Provide a path to an existing readable directory");
+            System.exit(2);
+        }
+
+        SourceRoot root = new SourceRoot(file.toPath());
+        PublicElementsPrinter printer = new PublicElementsPrinter();
+        root.parse("", (localPath, absolutePath, result) -> {
+            result.ifSuccessful(unit -> unit.accept(printer, null));
+            return SourceRoot.Callback.Result.DONT_SAVE;
+        });
+    }
+
+
+}

code/Exercise5/src/main/java/fr/istic/vv/PublicElementsPrinter.java

@@ -0,0 +1,48 @@
+package fr.istic.vv;
+
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.body.*;
+import com.github.javaparser.ast.visitor.VoidVisitorWithDefaults;
+
+
+// This class visits a compilation unit and
+// prints all public enum, classes or interfaces along with their public methods
+public class PublicElementsPrinter extends VoidVisitorWithDefaults<Void> {
+
+    @Override
+    public void visit(CompilationUnit unit, Void arg) {
+        for(TypeDeclaration<?> type : unit.getTypes()) {
+            type.accept(this, null);
+        }
+    }
+
+    public void visitTypeDeclaration(TypeDeclaration<?> declaration, Void arg) {
+        if(!declaration.isPublic()) return;
+        System.out.println(declaration.getFullyQualifiedName().orElse("[Anonymous]"));
+        for(MethodDeclaration method : declaration.getMethods()) {
+            method.accept(this, arg);
+        }
+        // Printing nested types in the top level
+        for(BodyDeclaration<?> member : declaration.getMembers()) {
+            if (member instanceof TypeDeclaration)
+                member.accept(this, arg);
+        }
+    }
+
+    @Override
+    public void visit(ClassOrInterfaceDeclaration declaration, Void arg) {
+        visitTypeDeclaration(declaration, arg);
+    }
+
+    @Override
+    public void visit(EnumDeclaration declaration, Void arg) {
+        visitTypeDeclaration(declaration, arg);
+    }
+
+    @Override
+    public void visit(MethodDeclaration declaration, Void arg) {
+        if(!declaration.isPublic()) return;
+        System.out.println("  " + declaration.getDeclarationAsString(true, true));
+    }
+
+}

exercises/extending-pmd.md

@@ -23,3 +23,37 @@ Use your rule with different projects and describe you findings below. See the [
 
 ## Answer
 
+
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="Nested If Ruleset"
+         xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+    <description>
+        Ruleset pour détecter 3 niveaux (ou plus) de if imbriqués.
+    </description>
+    <rule name="nestedIfRule"
+        language="java"
+        message="nested If"
+        class="net.sourceforge.pmd.lang.rule.xpath.XPathRule">
+        <description>
+            Three or more nested `if` !
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property
+                name="xpath"
+                value ="    //IfStatement[
+                                descendant::IfStatement[
+                                    descendant::IfStatement
+                                ]
+                            ]"
+            />
+        </properties>
+    </rule>
+</ruleset>
+```
+
+en testant un programme Java, il détecte bien les imbrications de 'if' même s'ils ne sont pas directement imbriqués, séparés par un while par exemple