Example usage for java.lang Class getField

List of usage examples for java.lang Class getField

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Introduction

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

Prototype

@CallerSensitive
public Field getField(String name) throws NoSuchFieldException, SecurityException

Source Link

Document

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

Usage

From source file:org.eclipse.wb.internal.core.model.property.editor.style.StylePropertyEditor.java

private static Field getField(EditorState state, Class<?> baseClass, String name) {
    try {/* w ww. j  av  a 2s.  co m*/
        return baseClass.getField(name);
    } catch (NoSuchFieldException e) {
        state.addWarning(new EditorWarning(
                "StylePropertyEditor: can not find field " + baseClass.getName() + "." + name, e));
        return null;
    }
}

From source file:de.micromata.genome.gwiki.utils.ClassUtils.java

public static void populateBeanWithPuplicMembers(Object bean, Map<String, Object> reqMap) {
    Class<?> cls = bean.getClass();
    for (Map.Entry<String, Object> me : reqMap.entrySet()) {
        try {// ww w. ja  va2s.  c  o  m
            String s = getSetter(me.getKey());
            if (hasMethod(cls, s) == true) {
                BeanUtilsBean.getInstance().setProperty(bean, me.getKey(), me.getValue());
            } else {
                Field f;
                try {
                    f = cls.getField(me.getKey());
                    if (f != null) {
                        f.set(bean, convert(me.getValue(), f.getType()));
                    }
                } catch (NoSuchFieldException ex) {
                    continue;
                }
            }
        } catch (Exception ex) {
            throw new RuntimeException("Failure to set propert: " + me.getKey() + " in class: " + cls.getName()
                    + "; with value: " + me.getValue() + ";" + ex.getMessage(), ex);
        }
    }
}

From source file:nl.nn.adapterframework.util.ClassUtils.java

public static Object getFieldValue(Object o, Class c, String name)
        throws IllegalArgumentException, SecurityException, IllegalAccessException, NoSuchFieldException {
    return c.getField(name).get(o);
}

From source file:com.adito.agent.client.ProxyUtil.java

/**
 * Attempt to proxy settings from Internet Explorer.
 * /*from   ww  w.j  av  a2s  .  c  om*/
 * @return internet explorer proxy settings
 * @throws IOException if IE settings could not be obtained for some reason
 */
public static BrowserProxySettings lookupIEProxySettings() throws IOException {

    try {
        Vector addresses = new Vector();
        Vector proxies = new Vector();
        String proxyServerValue = null;
        String proxyOveride = null;

        /* Only use jRegistry if on Windows, running 1.3 or up Java
         * and NOT Windows Vista with JDK6.0 (because of jvm crash)
         */

        if (Utils.isSupportedJRE("+1.3") && Utils.isSupportedPlatform(
                "Windows") /*&&
                           !(Utils.isSupportedOSVersion("+6.0") && Utils.isSupportedJRE("+1.6"))*/) {

            /*
             * We can use jRegistryKey API to lookup IE settings in the
             * registry
             */
            //                RegistryKey key = new RegistryKey(RootKey.HKEY_CURRENT_USER,
            //                                "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings"); //$NON-NLS-1$

            String proxyEnable = WinRegistry.getRegistryValue("user",
                    "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", "ProxyEnable", "0");
            if (proxyEnable != null) { //$NON-NLS-1$
                /*
                 * We have ProxyEnable so check to see if we are using a
                 * proxy
                 */
                if (proxyEnable.equals("1")) { //$NON-NLS-1$ //$NON-NLS-2$

                    proxyServerValue = WinRegistry.getRegistryValue("user",
                            "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", "ProxyServer",
                            null);
                    if (proxyServerValue != null) { //$NON-NLS-1$
                        /**
                         * We have some proxy settings. The values will be
                         * in the format "server.proxy.net:8888" or
                         */

                        proxyOveride = WinRegistry.getRegistryValue("user",
                                "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings",
                                "ProxyOverride", null);
                    }
                } else {

                }
            }
        } else {
            if (System.getProperty("java.vendor").startsWith("Microsoft")) { //$NON-NLS-1$ //$NON-NLS-2$
                try {
                    Class clazz = Class.forName("com.ms.lang.RegKey"); //$NON-NLS-1$
                    int userRoot = clazz.getField("USER_ROOT").getInt(null); //$NON-NLS-1$
                    int keyOpenAll = clazz.getField("KEYOPEN_ALL").getInt(null); //$NON-NLS-1$
                    // #ifdef DEBUG
                    log.info(Messages.getString("ProxyUtil.lookingForRoot")); //$NON-NLS-1$
                    // #endif
                    Object rootKey = clazz.getMethod("getRootKey", new Class[] { int.class }).invoke(null, //$NON-NLS-1$
                            new Object[] { new Integer(userRoot) });
                    // #ifdef DEBUG
                    log.info(Messages.getString("ProxyUtil.getIERegistryKey")); //$NON-NLS-1$
                    // #endif
                    Object key = clazz.getConstructor(new Class[] { clazz, String.class, int.class })
                            .newInstance(new Object[] { rootKey,
                                    "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", //$NON-NLS-1$
                                    new Integer(keyOpenAll) });
                    // #ifdef DEBUG
                    log.info(Messages.getString("ProxyUtil.checkingIfProxyEnabled")); //$NON-NLS-1$
                    // #endif
                    if (((Integer) (clazz.getMethod("getIntValue", new Class[] { String.class }).invoke(key, //$NON-NLS-1$
                            new Object[] { "ProxyEnable" }))).intValue() == 1) { //$NON-NLS-1$
                        // #ifdef DEBUG
                        log.info(Messages.getString("ProxyUtil.gettingProxyServerList")); //$NON-NLS-1$
                        // #endif
                        proxyServerValue = (String) (clazz.getMethod("getStringValue", //$NON-NLS-1$
                                new Class[] { String.class, String.class })
                                .invoke(key, new Object[] { "ProxyServer", "" })); //$NON-NLS-1$ //$NON-NLS-2$
                        // #ifdef DEBUG
                        log.info(Messages.getString("ProxyUtil.gettingProxyOverides")); //$NON-NLS-1$
                        // #endif
                        proxyOveride = (String) (clazz
                                .getMethod("getStringValue", new Class[] { String.class, String.class }) //$NON-NLS-1$
                                .invoke(key, new Object[] { "ProxyOverride", "" })); //$NON-NLS-1$ //$NON-NLS-2$
                    }
                } catch (Throwable t) {
                    t.printStackTrace();
                }

            } else {
                // #ifdef DEBUG
                log.info(MessageFormat.format(Messages.getString("ProxyUtil.unsupportedJavaRuntime"), //$NON-NLS-1$
                        new Object[] { System.getProperty("java.version"), //$NON-NLS-1$
                                System.getProperty("java.vendor") })); //$NON-NLS-1$
                // #endif
            }

        }

        ProxyInfo p;

        if (proxyServerValue != null && proxyServerValue.indexOf(';') > -1) {
            /**
             * Format is multiple
             * "ftp=ftp.com:4444;gopher=gopher.com:3333;http=198.162.1.119:8888;https=https.com:2222;socks=socks.com:1111"
             */
            StringTokenizer tokens = new StringTokenizer(proxyServerValue, ";"); //$NON-NLS-1$

            while (tokens.hasMoreTokens()) {
                p = createProxyInfo(tokens.nextToken(), "IE Proxy Settings"); //$NON-NLS-1$
                proxies.addElement(p);
            }

        } else if (proxyServerValue != null) {
            /**
             * Format is single "http=server.proxy.net:8888" or
             * "server.proxy.net:8888"
             */
            p = createProxyInfo(proxyServerValue, "IE Proxy Settings"); //$NON-NLS-1$
            proxies.addElement(p);
        }

        BrowserProxySettings bps = new BrowserProxySettings();
        bps.setBrowser("Internet Explorer"); //$NON-NLS-1$
        bps.setProxies(new ProxyInfo[proxies.size()]);
        proxies.copyInto(bps.getProxies());
        if (proxyOveride != null) {

            StringTokenizer tokens = new StringTokenizer(proxyOveride, ";"); //$NON-NLS-1$

            while (tokens.hasMoreTokens()) {
                addresses.addElement(tokens.nextToken());
            }
        }

        bps.setBypassAddr(new String[addresses.size()]);
        addresses.copyInto(bps.getBypassAddr());
        return bps;

    } catch (Throwable t) {
        t.printStackTrace();
        throw new IOException(MessageFormat.format(Messages.getString("ProxyUtil.failedToLookupIEProxies"), //$NON-NLS-1$
                new Object[] { t.getMessage() }));
    }
}

From source file:com.cardvlaue.sys.util.ScreenUtil.java

private static int getStatusBarHeight(AppCompatActivity activity) {
    Class<?> c;
    Object obj;//w w w. ja v a  2  s.  c  o m
    Field field;
    int x;
    int statusBarHeight = 0;
    try {
        c = Class.forName("com.android.internal.R$dimen");
        obj = c.newInstance();
        field = c.getField("status_bar_height");
        x = Integer.parseInt(field.get(obj).toString());
        statusBarHeight = activity.getResources().getDimensionPixelSize(x);
    } catch (Exception e1) {
        e1.printStackTrace();
    }
    return statusBarHeight;
}

From source file:org.opoo.util.ClassUtils.java

public static Object getConstantValue(String name) {
    Class clazz;
    try {//from ww  w. j  a  v  a2  s  .c  o  m
        clazz = forName(StringUtils.qualifier(name));
    } catch (ClassNotFoundException cnfe) {
        return null;
    }
    try {
        return clazz.getField(StringUtils.unqualify(name)).get(null);
    } catch (Exception e) {
        return null;
    }
}

From source file:org.gridgain.grid.util.GridConfigurationHelper.java

/**
 * Overrides configuration.// ww  w  .ja  va 2 s . c  om
 *
 * @param cfg Configuration.
 * @param props Properties.
 * @param gridName Grid name.
 * @param log Logger.
 * @throws GridException If overrides failed.
 */
public static void overrideConfiguration(GridConfiguration cfg, Map<Object, Object> props, String gridName,
        GridLogger log) throws GridException {
    assert cfg != null;
    assert props != null;
    assert log != null;

    Map<String, String> nameMap = new HashMap<String, String>();

    // Properties for all grids.
    String prefix = PROPERTY_PREFIX + "*.";

    for (Map.Entry<Object, Object> entry : props.entrySet())
        if (entry.getKey() instanceof String) {
            String key = (String) entry.getKey();

            if (key.startsWith(prefix))
                nameMap.put(key.substring(prefix.length()), key);
        }

    // Properties for grids with specified name.
    prefix = PROPERTY_PREFIX + (gridName != null ? gridName : "") + '.';

    for (Map.Entry<Object, Object> entry : props.entrySet())
        if (entry.getKey() instanceof String) {
            String key = (String) entry.getKey();

            if (key.startsWith(prefix))
                nameMap.put(key.substring(prefix.length()), key);
        }

    for (Map.Entry<String, String> entry : nameMap.entrySet()) {
        String key = entry.getKey();
        String fullKey = entry.getValue();

        Object objVal = props.get(fullKey);

        if (!(objVal instanceof String)) {
            U.warn(log, "Failed to override configuration property (value must be a String) [key=" + fullKey
                    + ", value=" + objVal + ']');

            break;
        }

        String val = (String) objVal;

        Object target;
        String targetPropName;

        if (key.startsWith(CONFIG_PREFIX)) {
            targetPropName = key.substring(CONFIG_PREFIX.length());

            target = cfg;
        } else if (key.startsWith(SPI_PREFIX)) {
            String prop = key.substring(SPI_PREFIX.length());

            String[] s = prop.split("\\.");

            if (s == null || s.length != 2) {
                U.warn(log, "Wrong SPI parameter name format (will ignore): " + fullKey);

                continue;
            }

            target = findSpi(cfg, s[0]);

            if (target == null) {
                U.warn(log, "Failed to find target spi for property (will ignore): " + fullKey);

                continue;
            }

            targetPropName = s[1];
        } else if (key.startsWith(CACHE_PREFIX)) {
            String prop = key.substring(CACHE_PREFIX.length());

            String[] s = prop.split("\\.");

            if (s == null || s.length != 2) {
                U.warn(log, "Wrong Cache parameter name format (will ignore): " + fullKey);

                continue;
            }

            target = findCache(cfg, s[0]);

            if (target == null) {
                U.warn(log, "Failed to find target cache configuration for property (will ignore): " + fullKey);

                continue;
            }

            targetPropName = s[1];
        } else if (key.startsWith(LOG_PREFIX)) {
            boolean isLog4jUsed = GridConfigurationHelper.class.getClassLoader()
                    .getResource("org/apache/log4j/Appender.class") != null;

            if (isLog4jUsed) {
                try {
                    Class logCls = Class.forName("org.apache.log4j.Logger");

                    Object log4j = logCls.getMethod("getLogger", String.class).invoke(logCls, val);

                    Class levelCls = Class.forName("org.apache.log4j.Level");

                    log4j.getClass().getMethod("setLevel", levelCls).invoke(log4j,
                            levelCls.getField("DEBUG").get(levelCls));
                } catch (Exception ignore) {
                    U.warn(log, "Failed to change log level for property (will ignore): " + fullKey);
                }
            }

            continue;
        } else {
            U.warn(log, "Wrong Configuration parameter name format (will ignore): " + fullKey);

            continue;
        }

        assert target != null;

        if (F.isEmpty(targetPropName)) {
            U.warn(log, "Wrong configuration parameter name format (will ignore): " + fullKey);

            continue;
        }

        Method mtd = findSetterMethod(target.getClass(), targetPropName);

        if (mtd == null) {
            U.warn(log, "Failed to find target setter method for property (will ignore): " + fullKey);

            continue;
        }

        Object param = convert(val, mtd.getParameterTypes()[0], fullKey);

        try {
            mtd.invoke(target, param);
        } catch (IllegalArgumentException e) {
            throw new GridException("Failed to invoke setter to override configuration property [name="
                    + fullKey + ", value=" + val + ']', e);
        } catch (IllegalAccessException e) {
            throw new GridException(
                    "Failed to invoke getter or setter to override configuration property [name=" + fullKey
                            + ", value=" + val + ']',
                    e);
        } catch (InvocationTargetException e) {
            throw new GridException(
                    "Failed to invoke getter or setter to override configuration property [name=" + fullKey
                            + ", value=" + val + ']',
                    e);
        }

        if (log.isInfoEnabled())
            log.info("Override configuration property [name=" + fullKey + ", value=" + val + ']');
    }
}

From source file:org.springframework.richclient.util.ClassUtils.java

/**
 * Gets the field value for the specified qualified field name.
 *///from w  w  w  .j  av  a2s.co  m
public static Object getFieldValue(String qualifiedFieldName) {
    Class clazz;
    try {
        clazz = classForName(ClassUtils.qualifier(qualifiedFieldName));
    } catch (ClassNotFoundException cnfe) {
        return null;
    }
    try {
        return clazz.getField(ClassUtils.unqualify(qualifiedFieldName)).get(null);
    } catch (Exception e) {
        return null;
    }
}

From source file:org.hibernate.internal.util.ReflectHelper.java

/**
 * Resolve a constant to its actual value.
 *
 * @param name The name//from  w  w  w. jav  a2 s. c o  m
 * @return The value
 */
public static Object getConstantValue(String name) {
    Class clazz;
    try {
        clazz = classForName(StringHelper.qualifier(name));
    } catch (Throwable t) {
        return null;
    }
    try {
        return clazz.getField(StringHelper.unqualify(name)).get(null);
    } catch (Throwable t) {
        return null;
    }
}

From source file:org.eclipse.xtend.typesystem.emf.EcoreUtil2.java

/**
 * Finds an EMF EPackage instance by its class name. The EPackage class must
 * be loadable by the ResourceLoader/*from w ww . j a va 2s  .co m*/
 * 
 * @param ePackage
 *            The class name of the EPackage interface
 * @return The EPackage instance. Returns <code>null</code> if any exception
 *         occurs after the class was successfully loaded.
 * @throws ConifgurationException
 *             If the class specified by <tt>ePackage</tt> cannot be loaded.
 */
public static EPackage getEPackageByClassName(final String ePackage) throws ConfigurationException {
    Class clazz;
    try {
        // try to load the EPackage class with the ResourceLoader
        clazz = ResourceLoaderFactory.createResourceLoader().loadClass(ePackage);
        if (clazz == null)
            throw new ConfigurationException("Couldn't find class " + ePackage);
        // each EPackage class has an 'eINSTANCE' field which holds the
        // implementation instance
        final Field f = clazz.getField("eINSTANCE");
        // retrieve the EPackage instance from the eINSTANCE field
        final EPackage result = (EPackage) f.get(null);
        // register the EPackage instance in the EPackage Registry
        EPackage.Registry.INSTANCE.put(result.getNsURI(), result);
        return result;
    } catch (final SecurityException e) {
        log.error(e);
        return null;
    } catch (final NoSuchFieldException e) {
        log.error(e);
        return null;
    } catch (final IllegalArgumentException e) {
        log.error(e);
        return null;
    } catch (final IllegalAccessException e) {
        log.error(e);
        return null;
    } finally {
        logPackages();
    }
}