Examples with ClassReader org.springframework.asm.ClassReader used on opensource projects

Example 1 with ClassReader

use of org.springframework.asm.ClassReader in project spring-boot by spring-projects.

the class AutoConfigurationMetadata method readAutoConfiguration.

private Properties readAutoConfiguration() throws IOException {
    Properties autoConfiguration = CollectionFactory.createSortedProperties(true);
    Set<String> classNames = new LinkedHashSet<>();
    classNames.addAll(readSpringFactories());
    classNames.addAll(readAutoConfigurationsFile());
    Set<String> publicClassNames = new LinkedHashSet<>();
    for (String className : classNames) {
        File classFile = findClassFile(className);
        if (classFile == null) {
            throw new IllegalStateException("Auto-configuration class '" + className + "' not found.");
        }
        try (InputStream in = new FileInputStream(classFile)) {
            int access = new ClassReader(in).getAccess();
            if ((access & Opcodes.ACC_PUBLIC) == Opcodes.ACC_PUBLIC) {
                publicClassNames.add(className);
            }
        }
    }
    autoConfiguration.setProperty("autoConfigurationClassNames", String.join(",", publicClassNames));
    autoConfiguration.setProperty("module", getProject().getName());
    return autoConfiguration;
}

Example 2 with ClassReader

use of org.springframework.asm.ClassReader in project spring-boot by spring-projects.

the class MainClassFinder method createClassDescriptor.

private static ClassDescriptor createClassDescriptor(InputStream inputStream) {
    try {
        ClassReader classReader = new ClassReader(inputStream);
        ClassDescriptor classDescriptor = new ClassDescriptor();
        classReader.accept(classDescriptor, ClassReader.SKIP_CODE);
        return classDescriptor;
    } catch (IOException ex) {
        return null;
    }
}

Example 3 with ClassReader

use of org.springframework.asm.ClassReader in project spring-boot by spring-projects.

the class DatabaseDriverClassNameTests method getInterfaceNames.

private List<String> getInterfaceNames(String className) throws IOException {
    // Use ASM to avoid unwanted side-effects of loading JDBC drivers
    ClassReader classReader = new ClassReader(getClass().getResourceAsStream("/" + className + ".class"));
    List<String> interfaceNames = new ArrayList<>();
    for (String name : classReader.getInterfaces()) {
        interfaceNames.add(name);
        interfaceNames.addAll(getInterfaceNames(name));
    }
    String superName = classReader.getSuperName();
    if (superName != null) {
        interfaceNames.addAll(getInterfaceNames(superName));
    }
    return interfaceNames;
}

Example 4 with ClassReader

use of org.springframework.asm.ClassReader in project spring-framework by spring-projects.

the class AbstractClassGenerator method generate.

protected Class generate(ClassLoaderData data) {
    Class gen;
    Object save = CURRENT.get();
    CURRENT.set(this);
    try {
        ClassLoader classLoader = data.getClassLoader();
        if (classLoader == null) {
            throw new IllegalStateException("ClassLoader is null while trying to define class " + getClassName() + ". It seems that the loader has been expired from a weak reference somehow. " + "Please file an issue at cglib's issue tracker.");
        }
        synchronized (classLoader) {
            String name = generateClassName(data.getUniqueNamePredicate());
            data.reserveName(name);
            this.setClassName(name);
        }
        if (attemptLoad) {
            try {
                gen = classLoader.loadClass(getClassName());
                return gen;
            } catch (ClassNotFoundException e) {
            // ignore
            }
        }
        byte[] b = strategy.generate(this);
        String className = ClassNameReader.getClassName(new ClassReader(b));
        ProtectionDomain protectionDomain = getProtectionDomain();
        synchronized (classLoader) {
            // just in case
            // SPRING PATCH BEGIN
            gen = ReflectUtils.defineClass(className, b, classLoader, protectionDomain, contextClass);
        // SPRING PATCH END
        }
        return gen;
    } catch (RuntimeException | Error ex) {
        throw ex;
    } catch (Exception ex) {
        throw new CodeGenerationException(ex);
    } finally {
        CURRENT.set(save);
    }
}

Example 5 with ClassReader

use of org.springframework.asm.ClassReader in project spring-framework by spring-projects.

the class LocalVariableTableParameterNameDiscoverer method inspectClass.

/**
 * Inspects the target class.
 * <p>Exceptions will be logged, and a marker map returned to indicate the
 * lack of debug information.
 */
private Map<Executable, String[]> inspectClass(Class<?> clazz) {
    InputStream is = clazz.getResourceAsStream(ClassUtils.getClassFileName(clazz));
    if (is == null) {
        // simply means this method of discovering parameter names won't work.
        if (logger.isDebugEnabled()) {
            logger.debug("Cannot find '.class' file for class [" + clazz + "] - unable to determine constructor/method parameter names");
        }
        return NO_DEBUG_INFO_MAP;
    }
    // custom handling of the close() method in a finally-block.
    try {
        ClassReader classReader = new ClassReader(is);
        Map<Executable, String[]> map = new ConcurrentHashMap<>(32);
        classReader.accept(new ParameterNameDiscoveringVisitor(clazz, map), 0);
        return map;
    } catch (IOException ex) {
        if (logger.isDebugEnabled()) {
            logger.debug("Exception thrown while reading '.class' file for class [" + clazz + "] - unable to determine constructor/method parameter names", ex);
        }
    } catch (IllegalArgumentException ex) {
        if (logger.isDebugEnabled()) {
            logger.debug("ASM ClassReader failed to parse class file [" + clazz + "], probably due to a new Java class file version that isn't supported yet " + "- unable to determine constructor/method parameter names", ex);
        }
    } finally {
        try {
            is.close();
        } catch (IOException ex) {
        // ignore
        }
    }
    return NO_DEBUG_INFO_MAP;
}