Examples with ClassReader org.apache.xbean.asm6.ClassReader used on opensource projects

Example 16 with ClassReader

use of org.apache.xbean.asm6.ClassReader in project intellij-community by JetBrains.

the class AbstractClassGenerator method create.

protected Object create(Object key) {
    try {
        Class gen = null;
        synchronized (source) {
            ClassLoader loader = getClassLoader();
            Map cache2 = null;
            cache2 = (Map) source.cache.get(loader);
            if (cache2 == null) {
                cache2 = new HashMap();
                cache2.put(NAME_KEY, new HashSet());
                source.cache.put(loader, cache2);
            } else if (useCache) {
                Reference ref = (Reference) cache2.get(key);
                gen = (Class) SoftReference.dereference(ref);
            }
            if (gen == null) {
                Object save = CURRENT.get();
                CURRENT.set(this);
                try {
                    this.key = key;
                    if (attemptLoad) {
                        try {
                            gen = loader.loadClass(getClassName());
                        } catch (ClassNotFoundException e) {
                        // ignore
                        }
                    }
                    if (gen == null) {
                        byte[] b = strategy.generate(this);
                        String className = ClassNameReader.getClassName(new $ClassReader(b));
                        getClassNameCache(loader).add(className);
                        gen = ReflectUtils.defineClass(className, b, loader);
                    }
                    if (useCache) {
                        cache2.put(key, new WeakReference(gen));
                    }
                    return firstInstance(gen);
                } finally {
                    CURRENT.set(save);
                }
            }
        }
        return firstInstance(gen);
    } catch (RuntimeException e) {
        throw e;
    } catch (Error e) {
        throw e;
    } catch (Exception e) {
        throw new CodeGenerationException(e);
    }
}

Example 17 with ClassReader

use of org.apache.xbean.asm6.ClassReader in project apex-core by apache.

the class FastClassIndexReaderTest method testPerformance.

@Test
public void testPerformance() throws Exception {
    String javahome = System.getProperty("java.home");
    String jdkJar = javahome + "/lib/rt.jar";
    JarFile jar = new JarFile(jdkJar);
    java.util.Enumeration<JarEntry> entriesEnum = jar.entries();
    long time = System.currentTimeMillis();
    while (entriesEnum.hasMoreElements()) {
        JarEntry jarEntry = entriesEnum.nextElement();
        if (jarEntry.getName().endsWith("class")) {
            InputStream ins = jar.getInputStream(jarEntry);
            //FastClassSignatureReader fastClassSignatureReader = new FastClassSignatureReader(ins);
            ClassReader classReader = new ClassReader(ins);
            ClassNodeType classN = new ClassNodeType();
            classReader.accept(classN, ClassReader.SKIP_CODE);
            CompactClassNode ccn = CompactUtil.compactClassNode(classN);
            ins.close();
        }
    }
    LOG.info("The time to scan jdk using ASM ClassReader {} ", System.currentTimeMillis() - time);
    jar.close();
    jar = new JarFile(jdkJar);
    entriesEnum = jar.entries();
    time = System.currentTimeMillis();
    while (entriesEnum.hasMoreElements()) {
        JarEntry jarEntry = entriesEnum.nextElement();
        if (jarEntry.getName().endsWith("class")) {
            InputStream ins = jar.getInputStream(jarEntry);
            FastClassIndexReader fastClassIndexReader = new FastClassIndexReader(ins);
            ins.close();
        }
    }
    jar.close();
    LOG.info("The time to scan jdk using FastClassIndexReader {} ", System.currentTimeMillis() - time);
}

Example 18 with ClassReader

use of org.apache.xbean.asm6.ClassReader in project geronimo-xbean by apache.

the class XbeanAsmParameterNameLoader method getAllMethodParameters.

/**
 * Gets the parameter names of all methods with the specified name or null if the class was compiled without debug symbols on.
 * @param clazz the class for which the method parameter names should be retrieved
 * @param methodName the of the method for which the parameters should be retrieved
 * @return a map from Method object to the parameter names or null if the class was compiled without debug symbols on
 */
public Map<Method, List<String>> getAllMethodParameters(Class clazz, String methodName) {
    // Determine the constructors?
    Method[] methods = getMethods(clazz, methodName);
    if (methods.length == 0) {
        return Collections.emptyMap();
    }
    // Check the cache
    if (methodCache.containsKey(methods[0])) {
        Map<Method, List<String>> methodParameters = new HashMap<Method, List<String>>();
        for (Method method : methods) {
            methodParameters.put(method, methodCache.get(method));
        }
        return methodParameters;
    }
    // Load the parameter names using ASM
    Map<Method, List<String>> methodParameters = new HashMap<Method, List<String>>();
    try {
        ClassReader reader = XbeanAsmParameterNameLoader.createClassReader(clazz);
        XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor visitor = new XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor(clazz, methodName);
        reader.accept(visitor, 0);
        Map exceptions = visitor.getExceptions();
        if (exceptions.size() == 1) {
            throw new RuntimeException((Exception) exceptions.values().iterator().next());
        }
        if (!exceptions.isEmpty()) {
            throw new RuntimeException(exceptions.toString());
        }
        methodParameters = visitor.getMethodParameters();
    } catch (IOException ex) {
    }
    // Cache the names
    for (Method method : methods) {
        methodCache.put(method, methodParameters.get(method));
    }
    return methodParameters;
}

Example 19 with ClassReader

use of org.apache.xbean.asm6.ClassReader in project geronimo-xbean by apache.

the class XbeanAsmParameterNameLoader method getAllConstructorParameters.

/**
 * Gets the parameter names of all constructor or null if the class was compiled without debug symbols on.
 * @param clazz the class for which the constructor parameter names should be retrieved
 * @return a map from Constructor object to the parameter names or null if the class was compiled without debug symbols on
 */
public Map<Constructor, List<String>> getAllConstructorParameters(Class clazz) {
    // Determine the constructors?
    List<Constructor> constructors = new ArrayList<Constructor>(Arrays.asList(clazz.getConstructors()));
    constructors.addAll(Arrays.asList(clazz.getDeclaredConstructors()));
    if (constructors.isEmpty()) {
        return Collections.emptyMap();
    }
    // Check the cache
    if (constructorCache.containsKey(constructors.get(0))) {
        Map<Constructor, List<String>> constructorParameters = new HashMap<Constructor, List<String>>();
        for (Constructor constructor : constructors) {
            constructorParameters.put(constructor, constructorCache.get(constructor));
        }
        return constructorParameters;
    }
    // Load the parameter names using ASM
    Map<Constructor, List<String>> constructorParameters = new HashMap<Constructor, List<String>>();
    try {
        ClassReader reader = XbeanAsmParameterNameLoader.createClassReader(clazz);
        XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor visitor = new XbeanAsmParameterNameLoader.AllParameterNamesDiscoveringVisitor(clazz);
        reader.accept(visitor, 0);
        Map exceptions = visitor.getExceptions();
        if (exceptions.size() == 1) {
            throw new RuntimeException((Exception) exceptions.values().iterator().next());
        }
        if (!exceptions.isEmpty()) {
            throw new RuntimeException(exceptions.toString());
        }
        constructorParameters = visitor.getConstructorParameters();
    } catch (IOException ex) {
    }
    // Cache the names
    for (Constructor constructor : constructors) {
        constructorCache.put(constructor, constructorParameters.get(constructor));
    }
    return constructorParameters;
}

Example 20 with ClassReader

use of org.apache.xbean.asm6.ClassReader in project tomee by apache.

the class TempClassLoader method isEnum.

/**
 * Fast-parse the given class bytecode to determine if it is an
 * enum class.
 */
private static boolean isEnum(final byte[] bytes) {
    final IsEnumVisitor isEnumVisitor = new IsEnumVisitor();
    final ClassReader classReader = new ClassReader(bytes);
    classReader.accept(isEnumVisitor, ClassReader.SKIP_DEBUG);
    return isEnumVisitor.isEnum;
}