Example usage for java.lang Class getMethod

Introduction

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

Prototype

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

Source Link

Document

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

Usage

From source file:com.revolsys.util.JavaBeanUtil.java

/**
 * Clone the value if it has a clone method.
 *
 * @param value The value to clone.// w  w w . j a v a 2  s  .  co m
 * @return The cloned value.
 */
@SuppressWarnings("unchecked")
public static <V> V clone(final V value) {
    if (value instanceof Map) {
        final Map<Object, Object> sourceMap = (Map<Object, Object>) value;
        final Map<Object, Object> map = new LinkedHashMap<>(sourceMap);
        for (final Entry<Object, Object> entry : sourceMap.entrySet()) {
            final Object key = entry.getKey();
            final Object mapValue = entry.getValue();
            final Object clonedMapValue = clone(mapValue);
            map.put(key, clonedMapValue);
        }
        return (V) map;
    } else if (value instanceof List) {
        final List<?> list = (List<?>) value;
        final List<Object> cloneList = new ArrayList<>();
        for (final Object object : list) {
            final Object clonedObject = clone(object);
            cloneList.add(clonedObject);
        }
        return (V) cloneList;
    } else if (value instanceof Cloneable) {
        try {
            final Class<? extends Object> valueClass = value.getClass();
            final Method method = valueClass.getMethod("clone", ARRAY_CLASS_0);
            if (method != null) {
                return (V) method.invoke(value, ARRAY_OBJECT_0);
            }
        } catch (final Throwable e) {
            return Exceptions.throwUncheckedException(e);
        }
    }
    return value;
}

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From source file:com.revolsys.util.JavaBeanUtil.java

public static Method getMethod(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
    try {/*  ww  w.j  a v a  2 s .  c om*/
        final Method method = clazz.getMethod(name, parameterTypes);
        return method;
    } catch (final NoSuchMethodException e) {
        throw new IllegalArgumentException(e);
    }
}

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From source file:com.antsdb.saltedfish.util.UberUtil.java

@SuppressWarnings("unchecked")
public static <T> T clone(final T obj) throws CloneNotSupportedException {
    if (obj == null) {
        return null;
    }/*from w  w  w.  j  a  v a 2  s .co  m*/
    if (obj instanceof Cloneable) {
        Class<?> clazz = obj.getClass();
        Method m;
        try {
            m = clazz.getMethod("clone", (Class[]) null);
        } catch (NoSuchMethodException ex) {
            throw new NoSuchMethodError(ex.getMessage());
        }
        try {
            return (T) m.invoke(obj, (Object[]) null);
        } catch (InvocationTargetException ex) {
            Throwable cause = ex.getCause();
            if (cause instanceof CloneNotSupportedException) {
                throw ((CloneNotSupportedException) cause);
            } else {
                throw new Error("Unexpected exception", cause);
            }
        } catch (IllegalAccessException ex) {
            throw new IllegalAccessError(ex.getMessage());
        }
    } else {
        throw new CloneNotSupportedException();
    }
}

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From source file:fit.Fixture.java

public static boolean hasParseMethod(Class<?> type) {
    try {// ww  w.j a  v a  2 s.  c o m
        type.getMethod("parse", String.class);
        return true;
    } catch (NoSuchMethodException e) {
        return false;
    }
}

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From source file:com.haulmont.bali.util.ReflectionHelper.java

/**
 * Searches for a method by its name and arguments.
 * @param c         class//  ww  w  .jav  a 2 s.c  o m
 * @param name      method name
 * @param params    method arguments
 * @return          method reference or null if a suitable method not found
 */
@Nullable
public static Method findMethod(Class c, String name, Object... params) {
    Class[] paramTypes = getParamTypes(params);

    Method method = null;
    try {
        method = c.getDeclaredMethod(name, paramTypes);
    } catch (NoSuchMethodException e) {
        try {
            method = c.getMethod(name, paramTypes);
        } catch (NoSuchMethodException e1) {
            //
        }
    }
    if (method != null)
        method.setAccessible(true);

    return method;
}

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From source file:Main.java

private static boolean setProxyPreICS(WebView webView, String host, final int port) {
    HttpHost proxyServer;// w w w . ja v a 2 s. c  o m
    if (null == host) {
        proxyServer = null;
    } else {
        proxyServer = new HttpHost(host, port);
    }
    Class networkClass = null;
    Object network = null;
    try {
        networkClass = Class.forName("android.webkit.Network");
        if (networkClass == null) {
            Log.e(LOG_TAG, "failed to get class for android.webkit.Network");
            return false;
        }
        Method getInstanceMethod = networkClass.getMethod("getInstance", Context.class);
        if (getInstanceMethod == null) {
            Log.e(LOG_TAG, "failed to get getInstance method");
        }
        network = getInstanceMethod.invoke(networkClass, new Object[] { webView.getContext() });
    } catch (Exception ex) {
        Log.e(LOG_TAG, "error getting network: " + ex);
        return false;
    }
    if (network == null) {
        Log.e(LOG_TAG, "error getting network: network is null");
        return false;
    }
    Object requestQueue = null;
    try {
        Field requestQueueField = networkClass.getDeclaredField("mRequestQueue");
        requestQueue = getFieldValueSafely(requestQueueField, network);
    } catch (Exception ex) {
        Log.e(LOG_TAG, "error getting field value");
        return false;
    }
    if (requestQueue == null) {
        Log.e(LOG_TAG, "Request queue is null");
        return false;
    }
    Field proxyHostField = null;
    try {
        Class requestQueueClass = Class.forName("android.net.http.RequestQueue");
        proxyHostField = requestQueueClass.getDeclaredField("mProxyHost");
    } catch (Exception ex) {
        Log.e(LOG_TAG, "error getting proxy host field");
        return false;
    }

    boolean temp = proxyHostField.isAccessible();
    try {
        proxyHostField.setAccessible(true);
        proxyHostField.set(requestQueue, proxyServer);
    } catch (Exception ex) {
        Log.e(LOG_TAG, "error setting proxy host");
    } finally {
        proxyHostField.setAccessible(temp);
    }
    Log.d(LOG_TAG, "Setting proxy with <= 3.2 API successful!");
    return true;
}

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From source file:com.haulmont.cuba.core.config.type.TypeFactory.java

@Nullable
private static TypeFactory getInferred(Class<?> returnType) {
    // special case due to Character.valueOf(char) does not accept String
    if (returnType == Character.class) {
        return new CharTypeFactory();
    }/*from   w  w  w .j a  va  2s . c o m*/

    for (String methodName : FACTORY_METHOD_NAMES) {
        try {
            Method factoryMethod = returnType.getMethod(methodName, String.class);
            if (isAcceptableMethod(returnType, factoryMethod)) {
                return new StaticTypeFactory(factoryMethod);
            }
        } catch (NoSuchMethodException ex) {
            // Ignore failure.
        }
    }
    try {
        Constructor ctor = returnType.getConstructor(String.class);
        if (Modifier.isPublic(ctor.getModifiers())) {
            return new ConstructorTypeFactory(ctor);
        }
    } catch (NoSuchMethodException e) {
        return null;
    }
    return null;
}

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From source file:AWTUtilities.java

/**
 * Sets the state of the specified frame, as specified by
 * <code>Frame.setExtendedState</code> if running in JDK 1.4 or later,
 * otherwise does nothing. The call to <code>Frame.setExtendedState()</code>
 * is done via reflection to avoid runtime errors. 
 */// w  ww  .  java 2 s .  co  m

public static void setExtendedFrameState(Frame frame, int state) {
    if (PlatformUtils.isJavaBetterThan("1.4")) {
        try {
            Class frameClass = Class.forName("java.awt.Frame");
            Method setExtendedStateMethod = frameClass.getMethod("setExtendedState", new Class[] { int.class });
            setExtendedStateMethod.invoke(frame, new Object[] { new Integer(state) });
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}

---

From source file:edu.cornell.mannlib.vedit.util.OperationUtils.java

public static void beanSetAndValidate(Object newObj, String field, String value, EditProcessObject epo) {
    Class<?> cls = (epo.getBeanClass() != null) ? epo.getBeanClass() : newObj.getClass();
    Class<?>[] paramList = new Class[1];
    paramList[0] = String.class;
    boolean isInt = false;
    boolean isBoolean = false;
    Method setterMethod = null;/*from  w  w  w .  j  a v a2s  .  c  om*/
    try {
        setterMethod = cls.getMethod("set" + field, paramList);
    } catch (NoSuchMethodException e) {
        // let's try int
        paramList[0] = int.class;
        try {
            setterMethod = cls.getMethod("set" + field, paramList);
            isInt = true;
        } catch (NoSuchMethodException f) {
            // let's try boolean
            paramList[0] = boolean.class;
            try {
                setterMethod = cls.getMethod("set" + field, paramList);
                isBoolean = true;
                log.debug("found boolean field " + field);
            } catch (NoSuchMethodException g) {
                log.error("beanSet could not find an appropriate String, int, or boolean setter method for "
                        + field);
            }

        }
    }
    Object[] arglist = new Object[1];
    if (isInt)
        arglist[0] = Integer.decode(value);
    else if (isBoolean)
        arglist[0] = (value.equalsIgnoreCase("TRUE"));
    else
        arglist[0] = value;
    try {
        setterMethod.invoke(newObj, arglist);
    } catch (Exception e) {
        log.error("Couldn't invoke method");
        log.error(e.getMessage());
        log.error(field + " " + arglist[0]);
    }
}

---

From source file:AWTUtilities.java

/**
 * Returns the state of the specified frame, as specified by
 * <code>Frame.getExtendedState()</code> if running under JDK 1.4 or later,
 * otherwise returns 0. The call to <code>Frame.getExtendedState()</code> is
 * done via reflection to avoid runtime errors.
 *///w  w w  .  ja v  a2 s. c o m

public static int getExtendedFrameState(Frame frame) {
    if (PlatformUtils.isJavaBetterThan("1.4")) {
        try {
            Class frameClass = Class.forName("java.awt.Frame");
            Method getExtendedStateMethod = frameClass.getMethod("getExtendedState", new Class[0]);
            Integer state = (Integer) getExtendedStateMethod.invoke(frame, new Object[0]);
            return state.intValue();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }

    return 0;
}

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