diff --git a/.travis.yml b/.travis.yml index 93fbcdb..093170a 100644 --- a/.travis.yml +++ b/.travis.yml @@ -6,7 +6,5 @@ jdk: branches: - /.*/ env: - - PROJECT_DIR=hw01 - - PROJECT_DIR=hw02 - - PROJECT_DIR=hw03 + - PROJECT_DIR=hw06 script: cd $PROJECT_DIR && ./gradlew check diff --git a/hw06/.idea/encodings.xml b/hw06/.idea/encodings.xml new file mode 100644 index 0000000..15a15b2 --- /dev/null +++ b/hw06/.idea/encodings.xml @@ -0,0 +1,4 @@ + + + + \ No newline at end of file diff --git a/hw06/.idea/gradle.xml b/hw06/.idea/gradle.xml new file mode 100644 index 0000000..f125908 --- /dev/null +++ b/hw06/.idea/gradle.xml @@ -0,0 +1,18 @@ + + + + + + \ No newline at end of file diff --git a/hw06/.idea/misc.xml b/hw06/.idea/misc.xml new file mode 100644 index 0000000..71286c2 --- /dev/null +++ b/hw06/.idea/misc.xml @@ -0,0 +1,10 @@ + + + + + + + + + \ No newline at end of file diff --git a/hw06/.idea/vcs.xml b/hw06/.idea/vcs.xml new file mode 100644 index 0000000..6c0b863 --- /dev/null +++ b/hw06/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/hw06/build.gradle b/hw06/build.gradle new file mode 100644 index 0000000..318f8cf --- /dev/null +++ b/hw06/build.gradle @@ -0,0 +1,25 @@ +plugins { + id 'java' +} + +sourceCompatibility = 11 + +repositories { + mavenCentral() +} + +dependencies { + testImplementation( + 'org.junit.jupiter:junit-jupiter-api:5.1.0' + ) + testRuntimeOnly( + 'org.junit.jupiter:junit-jupiter-engine:5.1.0' + ) +} + +test { + useJUnitPlatform() + testLogging { + events 'PASSED', 'FAILED', 'SKIPPED' + } +} \ No newline at end of file diff --git a/hw06/gradle/wrapper/gradle-wrapper.jar b/hw06/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..28861d2 Binary files /dev/null and b/hw06/gradle/wrapper/gradle-wrapper.jar differ diff --git a/hw06/gradle/wrapper/gradle-wrapper.properties b/hw06/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..115e6ac --- /dev/null +++ b/hw06/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-4.10-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/hw06/gradlew b/hw06/gradlew new file mode 100755 index 0000000..cccdd3d --- /dev/null +++ b/hw06/gradlew @@ -0,0 +1,172 @@ +#!/usr/bin/env sh + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS="" + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin, switch paths to Windows format before running java +if $cygwin ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=$((i+1)) + done + case $i in + (0) set -- ;; + (1) set -- "$args0" ;; + (2) set -- "$args0" "$args1" ;; + (3) set -- "$args0" "$args1" "$args2" ;; + (4) set -- "$args0" "$args1" "$args2" "$args3" ;; + (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=$(save "$@") + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong +if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then + cd "$(dirname "$0")" +fi + +exec "$JAVACMD" "$@" diff --git a/hw06/gradlew.bat b/hw06/gradlew.bat new file mode 100644 index 0000000..e95643d --- /dev/null +++ b/hw06/gradlew.bat @@ -0,0 +1,84 @@ +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS= + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto init + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto init + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:init +@rem Get command-line arguments, handling Windows variants + +if not "%OS%" == "Windows_NT" goto win9xME_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/hw06/hse/hw06/reflector/.keep b/hw06/hse/hw06/reflector/.keep new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/hw06/hse/hw06/reflector/.keep @@ -0,0 +1 @@ + diff --git a/hw06/settings.gradle b/hw06/settings.gradle new file mode 100644 index 0000000..6bb9183 --- /dev/null +++ b/hw06/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'hw06' + diff --git a/hw06/src/main/java/hse/hw06/reflector/Reflector.java b/hw06/src/main/java/hse/hw06/reflector/Reflector.java new file mode 100644 index 0000000..a6ca32a --- /dev/null +++ b/hw06/src/main/java/hse/hw06/reflector/Reflector.java @@ -0,0 +1,249 @@ +package hse.hw06.reflector; + +import java.io.File; +import java.io.IOException; +import java.io.PrintWriter; +import java.lang.reflect.*; +import java.util.Arrays; +import java.util.HashSet; +import java.util.Set; + +/** + * Class, which contains only methods to work with classes - print given class, print differences between classes + */ +public class Reflector { + + private static final Set WRAPPER_TYPES = new HashSet<>(Arrays.asList( + Boolean.TYPE, Character.TYPE, Byte.TYPE, Short.TYPE, Integer.TYPE, + Long.TYPE, Float.TYPE, Double.TYPE, Void.TYPE)); + private static boolean isWrapperType(Type type) { + return WRAPPER_TYPES.contains(type); + } + + private static void printModifiers(PrintWriter writer, int mod) { + if (Modifier.isPublic(mod)) { + writer.print("public "); + } + if (Modifier.isProtected(mod)) { + writer.print("protected "); + } + if (Modifier.isPrivate(mod)) { + writer.print("private "); + } + if (Modifier.isStatic(mod)) { + writer.print("static "); + } + } + + private static void printTypes(Type[] types, PrintWriter writer, boolean names) { + printTypes(Arrays.stream(types).map(s -> s.getTypeName().replace("$", ".")) + .toArray(String[]::new), writer, names); + } + + private static void printTypes(String[] types, PrintWriter writer, boolean names) { + int curNumber = 0; + for (var type: types) { + curNumber++; + writer.print(type); + if (names) { + writer.print(" arg"); + writer.print(curNumber); + } + if (curNumber < types.length) { + writer.print(", "); + } + } + } + + private static void printTypeParameters(TypeVariable[] types, PrintWriter writer) { + if (types.length > 0) { + writer.print("<"); + printTypes(Arrays.stream(types).map(t -> { + if (t.getBounds()[0].equals(Object.class)) { + return t.getName(); + } else { + return t.getName() + " extends " + t.getBounds()[0].getTypeName(); + } + }).toArray(String[]::new), writer, false); + writer.print(">"); + } + } + + private static void printClassDeclaration(Class someClass, PrintWriter writer, String indent) { + writer.print(indent); + printModifiers(writer, someClass.getModifiers()); + if (someClass.isInterface()) { + writer.print("interface "); + } else { + writer.print("class "); + } + writer.print(someClass.getSimpleName()); + printTypeParameters(Arrays.stream(someClass.getTypeParameters()) + .toArray(TypeVariable[]::new), writer); + writer.print(" "); + var superClass = someClass.getSuperclass(); + if (superClass != null && !(Object.class).equals(superClass)) { + writer.print("extends "); + writer.print(superClass.getSimpleName()); + writer.print(" "); + } + if (someClass.getGenericInterfaces().length > 0) { + writer.print("implements "); + printTypes(Arrays.stream(someClass.getGenericInterfaces()).map(s -> s.getTypeName() + .replace('$', '.')).toArray(String[]::new), writer, false); + } + writer.println("{"); + } + + private static void printExecutable(Executable method, PrintWriter writer, String indent) { + if (method.isSynthetic()) { + return; + } + writer.print(indent + " "); + printModifiers(writer, method.getModifiers()); + printTypeParameters(Arrays.stream(method.getTypeParameters()) + .toArray(TypeVariable[]::new), writer); + if (method.getTypeParameters().length > 0) { + writer.print(" "); + } + if (method instanceof Method) { + writer.print(((Method) method).getGenericReturnType().getTypeName()); + writer.print(" "); + writer.print(method.getName()); + } else { + writer.print(method.getDeclaringClass().getSimpleName()); + } + writer.print("("); + printTypes(method.getGenericParameterTypes(), writer, true); + writer.print(")"); + if (method.getExceptionTypes().length > 0) { + writer.print(" throws "); + printTypes(method.getExceptionTypes(), writer, false); + } + if (method.getDeclaringClass().isInterface()) { + writer.println(";"); + return; + } + if (!(method instanceof Method)) { + writer.println(" {}"); + return; + } + writer.println(" {"); + writer.print(indent + " return"); + var ret = ((Method) method).getGenericReturnType(); + if (ret.equals(Void.TYPE)) { + writer.println(";"); + } else if (isWrapperType(ret)) { + writer.println(" 0;"); + } else { + writer.println(" null;"); + } + writer.println(indent + " }"); + } + + private static void printField(Field field, PrintWriter writer, String indent) { + if (field.isSynthetic()) { + return; + } + writer.print(indent + " "); + printModifiers(writer, field.getModifiers()); + writer.print(field.getGenericType().getTypeName()); + writer.println(" " + field.getName() + ";"); + } + + private static void printClass(Class someClass, PrintWriter writer, String indent) { + printClassDeclaration(someClass, writer, indent); + for (var classInside: someClass.getDeclaredClasses()) { + printClass(classInside, writer, indent + " "); + } + for (var field: someClass.getDeclaredFields()) { + printField(field, writer, indent); + } + for (var constructor: someClass.getDeclaredConstructors()) { + printExecutable(constructor, writer, indent); + } + for (var method: someClass.getDeclaredMethods()) { + printExecutable(method, writer, indent); + } + writer.println(indent + "}"); + } + + /** + * Prints given class if "SomeClass.java" with name "SomeClass". + * Printed version does not contain field initialization. + * Instead of method implementation simple return statements are printed. + * @param someClass class to print + */ + public static void printStructure(Class someClass) throws IOException { + var packageName = someClass.getPackageName(); + var file = new File(packageName.replace('.', '/') + + "/" + someClass.getSimpleName() + ".java"); + file.createNewFile(); + try (var writer = new PrintWriter(file)) { + if (!packageName.equals("")) { + writer.println("package " + packageName + ";"); + writer.println(); + } + printClass(someClass, writer, ""); + } + } + + private static boolean unique(Class a, Class b) { + boolean same = true; + for (var c1: a.getDeclaredConstructors()) { + boolean exist = false; + for (var c2: b.getDeclaredConstructors()) { + if (c1.toGenericString().equals(c2.toGenericString())) { + exist = true; + } + } + if (!exist) { + System.out.println(c1.toGenericString()); + same = false; + } + } + for (var c1: a.getDeclaredMethods()) { + boolean exist = false; + for (var c2: b.getDeclaredMethods()) { + if (c1.toGenericString().equals(c2.toGenericString())) { + exist = true; + } + } + if (!exist) { + System.out.println(c1.toGenericString()); + same = false; + } + } + for (var c1: a.getDeclaredFields()) { + boolean exist = false; + for (var c2: b.getDeclaredFields()) { + if (c1.toGenericString().equals(c2.toGenericString())) { + exist = true; + } + } + if (!exist) { + System.out.println(c1.toGenericString()); + same = false; + } + } + return same; + } + + /** + * prints all methods and fields, which somehow(except enclosing class name) differs in two given classes + * @param a first class + * @param b second class + * @return true if there is no difference, otherwise false + */ + public static boolean diffClasses(Class a, Class b) { + System.out.println("Unique methods and fields in first class:"); + System.out.println("------------------------------------------"); + boolean same = unique(a, b); + System.out.println("------------------------------------------"); + System.out.println("Unique methods and fields in second class:"); + System.out.println("------------------------------------------"); + same &= unique(b, a); + System.out.println("------------------------------------------"); + return same; + } +} \ No newline at end of file diff --git a/hw06/src/test/java/hse/hw06/reflector/ReflectorTest.java b/hw06/src/test/java/hse/hw06/reflector/ReflectorTest.java new file mode 100644 index 0000000..eb27134 --- /dev/null +++ b/hw06/src/test/java/hse/hw06/reflector/ReflectorTest.java @@ -0,0 +1,91 @@ +package hse.hw06.reflector; + +import org.junit.jupiter.api.Test; + +import javax.tools.ToolProvider; +import java.io.File; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.PrintWriter; +import java.net.URL; +import java.net.URLClassLoader; +import java.util.Arrays; +import java.util.List; +import java.util.Map; + +import static org.junit.jupiter.api.Assertions.*; + +class Example { + interface Interface { + void a(); + int b(T x, U y); + Class c(T x, U y); + } + public class Implementation implements Interface { + public void a() { + } + public Class c(Object x, Object y) { + return null; + } + public int b(Object x, Object y) { + return 0; + } + } + private class Inner extends Nested { + Map map; + public class Inner2 { + G value; + } + Inner() { + map.clear(); + } + } + private static class Nested { + E value; + Nested() {} + Nested(E value) { + this.value = value; + } + } + static PrintWriter open(String path) throws FileNotFoundException { + try (var in = new PrintWriter(path)) { + return in; + } + } + static int plus(int a, int b) { + return a + b; + } + private E value; + private List s; + private Example(E value) { + this.value = value; + } + public void doNothing(List a, List b) {} + public Example check() { + return new Example("qwerty"); + } +} + +class ReflectorTest { + + @Test + void shouldPrintEmptyListOfDifferentMethodsAndFieldsFromExampleAndRenamedAndCompiledVersionOfClass() + throws IOException, ClassNotFoundException { + var example = Class.forName("hse.hw06.reflector.Example"); + Reflector.printStructure(example); + var file = new File[1]; + file[0] = new File("hse/hw06/reflector/Example.java"); + var compiler = ToolProvider.getSystemJavaCompiler(); + var fileManager = compiler.getStandardFileManager(null, null, null); + var unit = fileManager.getJavaFileObjectsFromFiles(Arrays.asList(file)); + compiler.getTask(null, fileManager, null, null, null, unit).call(); + fileManager.close(); + var cls = new File(""); + URL url = cls.toURI().toURL(); + URL[] urls = new URL[]{url}; + var classLoader = new URLClassLoader(urls, null); + var loadedClass = classLoader.loadClass("hse.hw06.reflector.Example"); + assertNotSame(example, loadedClass); + assertTrue(Reflector.diffClasses(example, loadedClass)); + } +} \ No newline at end of file