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[wip]ch 20.5
1 parent 43f5e9a commit 0aa32cb

12 files changed

Lines changed: 289 additions & 1 deletion

‎src/main/java/ch20/PasswordUtil.java‎

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package ch20;
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import ch20.unitTest.UseCase;
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import java.util.List;
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/**

‎src/main/java/ch20/UseCaseTracker.java‎

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package ch20;
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import ch20.unitTest.UseCase;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Collections;

‎src/main/java/ch20/unitTest/AtUnit.java‎

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package ch20.unitTest;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author: yuki
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* @date: 2018/11/1
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*/
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public class AtUnit implements ProcessFiles.Strategy {
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static Class<?> testClass;
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static List<String> failedTests = new ArrayList<>();
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static long testsRun = 0;
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static long failures = 0;
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@Override
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public void process(File file) {
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try{
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} catch (Exception e){
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}
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}
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}

‎src/main/java/ch20/unitTest/BinaryFile.java‎

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package ch20.unitTest;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.Arrays;
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/**
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* @author yuzhe
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* @since 10/12/18
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*/
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public class BinaryFile {
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public static byte[] read(File bFile) throws IOException {
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BufferedInputStream in = new BufferedInputStream(
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new FileInputStream(bFile)
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);
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try {
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byte[] data = new byte[in.available()];
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in.read(data);
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return data;
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} catch (IOException e) {
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e.printStackTrace();
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throw e;
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}
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}
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public static byte[] read(String path) throws IOException {
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return read(new File(path).getAbsoluteFile());
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}
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public static void main(String[] args) {
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String path = "target/classes/ch18/TextFile.class";
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try {
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byte[] data = read(path);
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byte[] magic = new byte[4];
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Integer num = 0;
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for(int i = 0; i < 4; i++){
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magic[i] = data[i];
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num <<= 8;
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num += (magic[i] & 0Xff);
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}
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System.out.println(Arrays.toString(magic));
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System.out.println(Integer.toBinaryString(num));
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System.out.println(Integer.toHexString(num));
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}

‎src/main/java/ch20/unitTest/ClassNameFinder.java‎

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package ch20.unitTest;
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import com.alibaba.fastjson.JSON;
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import java.io.ByteArrayInputStream;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @author: yuki
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* @date: 2018/11/2
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*/
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public class ClassNameFinder {
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public static String thisClass(byte[] classBytes) {
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Map<Integer, Integer> offsetTable = new HashMap<>();
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Map<Integer, String> classNameTable = new HashMap<>();
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try {
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//解析字节流
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DataInputStream data = new DataInputStream(
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new ByteArrayInputStream(classBytes)
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);
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// 0xcafebabe
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int magic = data.readInt();
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int minorVersion = data.readShort();
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int majorVersion = data.readShort();
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int constant_pool_count = data.readShort();
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int[] constant_pool = new int[constant_pool_count];
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for (int i = 1; i < constant_pool_count; i++) {
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int tag = data.read();
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int tableSize;
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//JVM Page 169
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switch (tag) {
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case 1:
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//UTF 编码的字符串
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int length = data.readShort();
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char[] bytes = new char[length];
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for (int k = 0; k < bytes.length; k++) {
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bytes[k] = (char) data.read();
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}
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String className = new String(bytes);
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classNameTable.put(i, className);
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break;
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case 5:
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//long
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case 6:
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//double
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data.readLong();
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i++;
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break;
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case 7:
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//class
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int offset = data.readShort();
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offsetTable.put(i, offset);
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break;
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case 8:
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//String 字符串类型字面量
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data.readShort();
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break;
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case 3:
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//integer
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case 4:
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//float
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case 9:
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//field ref
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case 10:
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//method ref
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case 11:
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//interface method ref
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case 12:
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// name and type
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data.readInt();
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break;
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default:
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throw new RuntimeException("Bad tag " + tag);
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}
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}
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short access_flag = data.readShort();
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int this_class = data.readShort();
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int super_class = data.readShort();
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System.out.println(this_class);
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System.out.println(JSON.toJSON(offsetTable).toString());
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System.out.println(JSON.toJSON(classNameTable).toString());
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return classNameTable.get(offsetTable.get(this_class))
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.replace('/', '.');
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public static void main(String[] args) throws IOException {
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String path ="target/classes/ch20/unitTest/Testable2.class";
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String result = thisClass(BinaryFile.read(path));
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System.out.println(result);
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}
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}

‎src/main/java/ch20/unitTest/ProcessFiles.java‎

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package ch20.unitTest;
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import lombok.AllArgsConstructor;
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import java.io.File;
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import java.io.IOException;
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/**
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* @author yuzhe
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* @since 10/9/18
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*/
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@AllArgsConstructor
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public class ProcessFiles {
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//纯粹为了使用接口从ch18复制过来，lombok插件和编译期注解蜜汁冲突
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public interface Strategy {
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void process(File file);
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}
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private Strategy strategy;
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private String ext;
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}

‎src/main/java/ch20/unitTest/Test.java‎

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package ch20.unitTest;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* @author: yuki
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* @date: 2018/11/1
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*/
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@Target(ElementType.METHOD)
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@Retention(RetentionPolicy.RUNTIME)
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public @interface Test {
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}

‎src/main/java/ch20/unitTest/TestObjectCleanup.java‎

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package ch20.unitTest;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* @author: yuki
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* @date: 2018/11/1
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*/
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@Target(ElementType.METHOD)
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@Retention(RetentionPolicy.RUNTIME)
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public @interface TestObjectCleanup {
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}

‎src/main/java/ch20/unitTest/TestObjectCreate.java‎

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package ch20.unitTest;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* @author: yuki
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* @date: 2018/11/1
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*/
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@Target(ElementType.METHOD)
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@Retention(RetentionPolicy.RUNTIME)
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public @interface TestObjectCreate {
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}

‎src/main/java/ch20/unitTest/TestProperty.java‎

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package ch20.unitTest;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* @author: yuki
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* @date: 2018/11/1
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*/
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@Retention(RetentionPolicy.RUNTIME)
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@Target({ElementType.FIELD, ElementType.METHOD})
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public @interface TestProperty {
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}

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