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LAB-3 Реализация standalone приложения
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9 files changed

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-61
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9 files changed

+403
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lines changed

‎build.gradle.kts‎

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@@ -18,6 +18,12 @@ dependencies {
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testImplementation(platform("org.junit:junit-bom:5.10.0"))
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testImplementation("org.junit.jupiter:junit-jupiter")
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testRuntimeOnly("org.junit.platform:junit-platform-launcher")
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implementation("org.slf4j:slf4j-api:2.0.16")
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implementation("ch.qos.logback:logback-classic:1.5.13")
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compileOnly("org.projectlombok:lombok:1.18.36")
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annotationProcessor("org.projectlombok:lombok:1.18.36")
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implementation("com.fasterxml.jackson.core:jackson-databind:2.0.1")
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}
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tasks.test {

‎result.json‎

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{
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"maxDepthOfInheritance" : 2,
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"averageInheritanceDepth" : 1.5,
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"averageOverriddenMethods" : 1.0,
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"averageFieldCount" : 0.7,
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"averageAbcScore" : 0.7234898064243891
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}

‎src/main/java/org/example/Example.java‎

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package org.example;
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import org.example.visitor.ClassPrinter;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.SerializationFeature;
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import lombok.extern.slf4j.Slf4j;
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import org.example.dto.Result;
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import org.example.model.JarMetrics;
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import org.example.visitor.CustomClassVisitor;
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import org.objectweb.asm.ClassReader;
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import java.io.IOException;
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import java.util.Enumeration;
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import java.nio.file.Paths;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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@Slf4j
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public class Example {
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public static void main(String[] args) throws IOException {
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// var printer = new ByteCodePrinter();
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// printer.printBubbleSortBytecode();
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try (JarFile sampleJar = new JarFile("src/main/resources/sample.jar")) {
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Enumeration<JarEntry> enumeration = sampleJar.entries();
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while (enumeration.hasMoreElements()) {
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JarEntry entry = enumeration.nextElement();
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if (entry.getName().endsWith(".class")) {
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ClassPrinter cp = new ClassPrinter();
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ClassReader cr = new ClassReader(sampleJar.getInputStream(entry));
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cr.accept(cp, 0);
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}
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}
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if (args.length != 2) {
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log.error("Ошибка чтения аргументов");
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System.exit(1);
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}
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var jarPath = args[0];
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var outputFileName = args[1];
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var result = processJarFile(jarPath);
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writeResultAsJson(result, outputFileName);
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}
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private static Result processJarFile(String jarFilePath) throws IOException {
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var jarMetrics = new JarMetrics();
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try (var jarFile = new JarFile(jarFilePath)) {
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jarFile.stream()
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.filter(e -> e.getName().endsWith(".class"))
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.forEach(entry -> processClass(entry, jarFile, jarMetrics));
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}
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jarMetrics.calculateMetrics();
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var stringBuilder = new StringBuilder()
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.append("Максимальная глубина наследования: ").append(jarMetrics.getMaxDepthOfInheritance()).append('\n')
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.append("Средняя глубина наследования: ").append(jarMetrics.getAverageInheritanceDepth()).append('\n')
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.append("Метрика ABC: ").append(jarMetrics.getAverageAbcScore()).append('\n')
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.append("Сколичество переопределенных методов: ").append(jarMetrics.getAverageOverriddenMethods()).append('\n')
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.append("Среднее количество полей в классе: ").append(jarMetrics.getAverageFieldCount());
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log.info(stringBuilder.toString());
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return buildFinalResult(jarMetrics);
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}
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private static void processClass(JarEntry entry, JarFile jarFile, JarMetrics metrics) {
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try {
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var reader = new ClassReader(jarFile.getInputStream(entry));
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reader.accept(new CustomClassVisitor(metrics), 0);
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} catch (IOException e) {
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throw new RuntimeException("Ошибка чтения файла. Причина: " + entry.getName(), e);
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}
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}
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private static Result buildFinalResult(JarMetrics metrics) {
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return Result.builder()
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.maxDepthOfInheritance(metrics.getMaxDepthOfInheritance())
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.averageInheritanceDepth(metrics.getAverageInheritanceDepth())
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.averageOverriddenMethods(metrics.getAverageOverriddenMethods())
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.averageFieldCount(metrics.getAverageFieldCount())
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.averageAbcScore(metrics.getAverageAbcScore())
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.build();
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}
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private static void writeResultAsJson(Object result, String outputFileName) throws IOException {
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var mapper = new ObjectMapper().enable(SerializationFeature.INDENT_OUTPUT);
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var file = Paths.get(outputFileName).toFile();
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if (file.getParentFile() != null && !file.getParentFile().exists()) {
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file.getParentFile().mkdirs();
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}
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if (!file.exists()) {
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file.createNewFile();
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}
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mapper.writeValue(file, result);
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log.info("Метрики сохранены в файл: {}", file.getAbsolutePath());
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}
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}

‎src/main/java/org/example/dto/Result.java‎

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package org.example.dto;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.ToString;
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@Getter
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@Builder
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@ToString
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public class Result {
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private int maxDepthOfInheritance;
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private double averageInheritanceDepth;
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private double averageOverriddenMethods;
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private double averageFieldCount;
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private double averageAbcScore;
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}

‎src/main/java/org/example/model/ClassMetrics.java‎

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package org.example.model;
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import lombok.Getter;
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import lombok.Setter;
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import java.util.ArrayList;
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import java.util.List;
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@Getter
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@Setter
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public class ClassMetrics {
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private String name;
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private String parentClassName;
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private int fieldCount;
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private final List<MethodMetrics> methodMetrics = new ArrayList<>();
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public void addMetrics(MethodMetrics methodMetrics) {
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this.methodMetrics.add(methodMetrics);
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}
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@Getter
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@Setter
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public static class MethodMetrics {
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private String signature;
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private final ABCMetric abcMetric = new ABCMetric();
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public void setMetricValue(double metricValue) {
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this.getAbcMetric().setMetricValue(metricValue);
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}
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@Getter
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@Setter
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public static class ABCMetric {
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private long assignments;
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private long branches;
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private long conditions;
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private double metricValue;
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}
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}
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}

‎src/main/java/org/example/model/JarMetrics.java‎

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package org.example.model;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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public class JarMetrics {
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private final Map<String, String> classParent = new HashMap<>();
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private final Map<String, List<String>> classMethods = new HashMap<>();
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private final Map<String, Integer> classMaxDepth = new HashMap<>();
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private final Map<String, Integer> classOverriddenMethods = new HashMap<>();
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private final Map<String, ClassMetrics> classMetrics = new HashMap<>();
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public void addParent(String className, String parent) {
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classParent.put(className, parent);
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}
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public void addMethods(String className, List<String> methodSignatures) {
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classMethods.put(className, methodSignatures);
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}
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public void addClassMetrics(ClassMetrics classMetrics) {
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this.classMetrics.put(classMetrics.getName(), classMetrics);
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}
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public void calculateMetrics() {
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classParent.keySet().forEach(this::calculateDepth);
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classMethods.forEach(this::calculateOverriddenMethods);
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}
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public int getMaxDepthOfInheritance() {
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return classMaxDepth.values().stream()
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.max(Integer::compareTo)
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.orElse(0);
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}
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public double getAverageInheritanceDepth() {
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return classMaxDepth.values().stream()
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.mapToInt(Integer::intValue)
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.average()
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.orElse(0.0);
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}
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public double getAverageAbcScore() {
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return classMetrics.values().stream()
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.flatMap(c -> c.getMethodMetrics().stream())
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.mapToDouble(mm -> mm.getAbcMetric().getMetricValue())
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.average()
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.orElse(0.0);
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}
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public double getAverageOverriddenMethods() {
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return classOverriddenMethods.values().stream()
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.mapToInt(Integer::intValue)
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.average()
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.orElse(0.0);
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}
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public double getAverageFieldCount() {
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return classMetrics.values().stream()
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.mapToInt(ClassMetrics::getFieldCount)
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.average()
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.orElse(0.0);
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}
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private void calculateDepth(String className) {
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classMaxDepth.put(className, computeDepth(className));
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}
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private int computeDepth(String className) {
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int depth = 0;
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var current = className;
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while (classParent.containsKey(current)) {
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depth++;
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current = classParent.get(current);
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}
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return depth;
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}
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private void calculateOverriddenMethods(String className, List<String> methods) {
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var inherited = collectInheritedMethods(className);
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var count = methods.stream().filter(inherited::contains).count();
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classOverriddenMethods.put(className, (int) count);
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}
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private Set<String> collectInheritedMethods(String className) {
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var parent = classParent.get(className);
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Set<String> inherited = new HashSet<>();
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while (parent != null) {
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var parentMethods = classMethods.get(parent);
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if (parentMethods != null) {
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inherited.addAll(parentMethods);
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}
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parent = classParent.get(parent);
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}
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return inherited;
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}
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}

‎src/main/java/org/example/visitor/ClassPrinter.java‎

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