Example usage for java.lang Class getDeclaredMethod

Introduction

In this page you can find the example usage for java.lang Class getDeclaredMethod.

Prototype

@CallerSensitive
public Method getDeclaredMethod(String name, Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException

Source Link

Document

Returns a Method object that reflects the specified declared method of the class or interface represented by this Class object.

Usage

From source file:Main.java

public static <T> T runPrivateMethod(Class<?> targetClass, String methodName, Class<?> paramClasses[],
        Object params[], Class<T> returnType) throws Exception {
    T returnValue = null;/*from   w  w w .ja v  a  2  s.  c  o m*/
    Method method = targetClass.getDeclaredMethod(methodName, paramClasses);
    if (!method.isAccessible())
        method.setAccessible(true);
    returnValue = (T) method.invoke(targetClass, params);
    return returnValue;
}

From source file:Main.java

/**
 * Finds a method in the given class or any super class with the name {@code prefix + methodName} that accepts 0
 * parameters.//from   w  w  w.  ja  v  a2s . com
 * 
 * @param aClass
 *          Class to search for method in
 * @param methodName
 *          Camelcase'd method name to search for with any of the provided prefixes
 * @param parameterTypes
 *          The parameter types the method signature must match.
 * @param prefixes
 *          Prefixes to prepend to {@code methodName} when searching for method names, e.g. "get", "is"
 * @return The first method found to match the format {@code prefix + methodName}
 */
public static Method findMethod(Class<?> aClass, String methodName, Class<?>[] parameterTypes,
        String... prefixes) {
    for (String prefix : prefixes) {
        try {
            return aClass.getDeclaredMethod(prefix + methodName, parameterTypes);
        } catch (NoSuchMethodException ex) {
            // ignore, continue searching prefixes
        }
    }
    // If no method found with any prefixes search the super class
    aClass = aClass.getSuperclass();
    return aClass == null ? null : findMethod(aClass, methodName, parameterTypes, prefixes);
}

From source file:Main.java

public static <T> T runPrivateMethod(Class<?> targetClass, Object obj, String methodName,
        Class<?> paramClasses[], Object params[], Class<T> returnType) throws Exception {
    T returnValue = null;/*  w w w .j  a v a 2  s . c om*/
    Method method = targetClass.getDeclaredMethod(methodName, paramClasses);
    if (!method.isAccessible())
        method.setAccessible(true);
    returnValue = (T) method.invoke(obj, params);
    return returnValue;
}

From source file:Main.java

public static Method getMethod(Class<?> targetClass, String name, Class<?>... parameterTypes) {
    if ((targetClass == null) || TextUtils.isEmpty(name)) {
        return null;
    }//from w ww  .j a  va  2 s.c o  m

    try {
        return targetClass.getDeclaredMethod(name, parameterTypes);
    } catch (Exception e) {
        if (DEBUG) {
            e.printStackTrace();
        }
    }

    return null;
}

From source file:Main.java

public static Object invokeMethod(Class<?> methodClass, String methodName, Class<?>[] parameters,
        Object instance, Object... arguments) {
    try {//  w w  w.ja  v  a 2s .  c o m
        Method e = methodClass.getDeclaredMethod(methodName, parameters);
        e.setAccessible(true);
        return e.invoke(instance, arguments);
    } catch (Exception var6) {
        var6.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static boolean hasCustomEquals(Class c) {
    Class origClass = c;/*from  ww  w.  j  av a  2  s . c o  m*/
    if (_customEquals.containsKey(c)) {
        return _customEquals.get(c);
    }

    while (!Object.class.equals(c)) {
        try {
            c.getDeclaredMethod("equals", Object.class);
            _customEquals.put(origClass, true);
            return true;
        } catch (Exception ignored) {
        }
        c = c.getSuperclass();
    }
    _customEquals.put(origClass, false);
    return false;
}

From source file:com.fjn.helper.common.util.StreamUtil.java

public static void close(Object closeable) {

    if (closeable != null) {
        try {//  w w  w. j a v a  2  s.c  o m
            if (closeable instanceof Closeable) {
                ((Closeable) closeable).close();
                return;
            }
        } catch (Exception ex) {
            // ignore it;
        }

        // close();
        Method closeMethod = null;
        Class<?> targetClass = closeable.getClass();
        while (closeMethod == null && targetClass != null) {
            try {
                closeMethod = targetClass.getDeclaredMethod("close", new Class[0]);
            } catch (Exception ex) {
                targetClass = targetClass.getSuperclass();
            }
        }

        if (closeMethod != null) {
            try {
                closeMethod.invoke(closeable, new Object[0]);
            } catch (Exception e) {
                // ignore it
            }
        }

    }

}

From source file:dyco4j.instrumentation.internals.CLI.java

private static void extendClassPath(final CommandLine cmdLine) throws IOException {
    try {//from   w  ww  .j a  va  2 s .  co m
        final URLClassLoader _urlClassLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
        final Class<URLClassLoader> _urlClass = URLClassLoader.class;
        final Method _method = _urlClass.getDeclaredMethod("addURL", URL.class);
        _method.setAccessible(true);
        addEntryToClassPath(_urlClassLoader, _method, cmdLine.getOptionValue(IN_FOLDER_OPTION));
        final String _classpathConfig = cmdLine.getOptionValue(CLASSPATH_CONFIG_OPTION);
        if (_classpathConfig != null) {
            for (final String _s : Files.readAllLines(Paths.get(_classpathConfig))) {
                addEntryToClassPath(_urlClassLoader, _method, _s);
            }
        }
    } catch (final NoSuchMethodException _e) {
        throw new RuntimeException(_e);
    }
}

From source file:com.netflix.hystrix.contrib.javanica.utils.AopUtils.java

/**
 * Gets declared method from specified type by mame and parameters types.
 *
 * @param type           the type/*w w w. j a  v a  2  s  .  c  o  m*/
 * @param methodName     the name of the method
 * @param parameterTypes the parameter array
 * @return a {@link Method} object or null if method doesn't exist
 */
public static Method getDeclaredMethod(Class<?> type, String methodName, Class<?>... parameterTypes) {
    Method method = null;
    try {
        method = type.getDeclaredMethod(methodName, parameterTypes);
        if (method.isBridge()) {
            method = MethodProvider.getInstance().unbride(method, type);
        }
    } catch (NoSuchMethodException e) {
        Class<?> superclass = type.getSuperclass();
        if (superclass != null) {
            method = getDeclaredMethod(superclass, methodName, parameterTypes);
        }
    } catch (ClassNotFoundException e) {
        Throwables.propagate(e);
    } catch (IOException e) {
        Throwables.propagate(e);
    }
    return method;
}

From source file:io.hops.util.RMStorageFactory.java

private static void addToClassPath(String s) throws StorageInitializtionException {
    try {//w  w  w  .  ja  v  a 2  s  .c o  m
        File f = new File(s);
        URL u = f.toURI().toURL();
        URLClassLoader urlClassLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
        Class urlClass = URLClassLoader.class;
        Method method = urlClass.getDeclaredMethod("addURL", new Class[] { URL.class });
        method.setAccessible(true);
        method.invoke(urlClassLoader, new Object[] { u });
    } catch (MalformedURLException ex) {
        throw new StorageInitializtionException(ex);
    } catch (IllegalAccessException ex) {
        throw new StorageInitializtionException(ex);
    } catch (IllegalArgumentException ex) {
        throw new StorageInitializtionException(ex);
    } catch (InvocationTargetException ex) {
        throw new StorageInitializtionException(ex);
    } catch (NoSuchMethodException ex) {
        throw new StorageInitializtionException(ex);
    } catch (SecurityException ex) {
        throw new StorageInitializtionException(ex);
    }
}