Example usage for java.lang.reflect Modifier FINAL

Introduction

In this page you can find the example usage for java.lang.reflect Modifier FINAL.

Prototype

int FINAL

To view the source code for java.lang.reflect Modifier FINAL.

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Document

The int value representing the final modifier.

Usage

From source file:org.granitemc.granite.reflect.ReflectionUtils.java

/**
 * Will force access to a field. This even works with private static final fields!
 * <p/>/*from  ww  w .  j a v a  2 s .  c om*/
 * Internally, this uses some reflection-on-reflection trickery I found on StackOverflow :)
 *
 * @param f The field to force access to
 */
public static void forceStaticAccessible(Field f) {
    try {
        f.setAccessible(true);

        // Some reflection-ception trickery
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(f, f.getModifiers() & ~Modifier.FINAL);
    } catch (NoSuchFieldException | IllegalAccessException e) {
        e.printStackTrace();
    }
}

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From source file:org.apache.atlas.repository.graph.TitanGraphProvider.java

/**
 * Titan loads index backend name to implementation using StandardIndexProvider.ALL_MANAGER_CLASSES
 * But StandardIndexProvider.ALL_MANAGER_CLASSES is a private static final ImmutableMap
 * Only way to inject Solr5Index is to modify this field. So, using hacky reflection to add Sol5Index
 *///from  w ww . j av a 2  s  .co m
private static void addSolr5Index() {
    try {
        Field field = StandardIndexProvider.class.getDeclaredField("ALL_MANAGER_CLASSES");
        field.setAccessible(true);

        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);

        Map<String, String> customMap = new HashMap(StandardIndexProvider.getAllProviderClasses());
        customMap.put("solr5", Solr5Index.class.getName());
        ImmutableMap<String, String> immap = ImmutableMap.copyOf(customMap);
        field.set(null, immap);

        LOG.debug("Injected solr5 index - {}", Solr5Index.class.getName());
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:Spy.java

private static int modifierFromString(String s) {
    int m = 0x0;//from   w w w  .ja v  a 2 s. c  o m
    if ("public".equals(s))
        m |= Modifier.PUBLIC;
    else if ("protected".equals(s))
        m |= Modifier.PROTECTED;
    else if ("private".equals(s))
        m |= Modifier.PRIVATE;
    else if ("static".equals(s))
        m |= Modifier.STATIC;
    else if ("final".equals(s))
        m |= Modifier.FINAL;
    else if ("transient".equals(s))
        m |= Modifier.TRANSIENT;
    else if ("volatile".equals(s))
        m |= Modifier.VOLATILE;
    return m;
}

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From source file:org.apache.atlas.repository.graphdb.titan0.Titan0Database.java

/**
 * Titan loads index backend name to implementation using
 * StandardIndexProvider.ALL_MANAGER_CLASSES But
 * StandardIndexProvider.ALL_MANAGER_CLASSES is a private static final
 * ImmutableMap Only way to inject Solr5Index is to modify this field. So,
 * using hacky reflection to add Sol5Index
 *//*w  w  w  . j av  a2 s . c  om*/
private static void addSolr5Index() {
    try {
        Field field = StandardIndexProvider.class.getDeclaredField("ALL_MANAGER_CLASSES");
        field.setAccessible(true);

        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);

        Map<String, String> customMap = new HashMap<>(StandardIndexProvider.getAllProviderClasses());
        customMap.put("solr", Solr5Index.class.getName()); // for
                                                           // consistency
                                                           // with Titan
                                                           // 1.0.0
        customMap.put("solr5", Solr5Index.class.getName()); // for backward
                                                            // compatibility
        ImmutableMap<String, String> immap = ImmutableMap.copyOf(customMap);
        field.set(null, immap);

        LOG.debug("Injected solr5 index - {}", Solr5Index.class.getName());
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.lunarray.model.descriptor.builder.annotation.base.listener.property.SetImmutableListener.java

/** {@inheritDoc} */
@Override//  w  w  w.j  a  v a  2s.  c om
public void handleEvent(final UpdatedPropertyTypeEvent<P, E, B> event) throws EventException {
    SetImmutableListener.LOGGER.debug("Handling event {}", event);
    Validate.notNull(event, "Event may not be null.");
    final AnnotationPropertyDescriptorBuilder<P, E, B> builder = event.getBuilder();
    final DescribedProperty<P> property = event.getProperty();
    // Mutability test.
    if ((property.getModifiers() & Modifier.FINAL) == Modifier.FINAL) {
        builder.immutable();
    }
}

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From source file:io.github.wysohn.triggerreactor.tools.ReflectionUtil.java

/**
 * https://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection
 * @param field// w w w.  ja  va 2s .c  om
 * @param newValue
 * @throws SecurityException
 * @throws NoSuchFieldException
 * @throws Exception
 */
private static void setFinalField(Object target, Field field, Object newValue) throws NoSuchFieldException {
    field.setAccessible(true);

    Field modifiersField = null;
    try {
        modifiersField = Field.class.getDeclaredField("modifiers");
    } catch (SecurityException e1) {
        e1.printStackTrace();
    }

    modifiersField.setAccessible(true);
    try {
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
    } catch (IllegalArgumentException | IllegalAccessException e) {
        e.printStackTrace();
    }

    try {
        field.set(target, newValue);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}

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From source file:org.opendaylight.sxp.route.core.RoutingServiceFactoryTest.java

private void changeOsIsLinuxField(final boolean mockedOsName)
        throws NoSuchFieldException, IllegalAccessException {
    final Field osNameField = SystemUtils.class.getDeclaredField("IS_OS_LINUX");
    osNameField.setAccessible(true);/*from  www.  ja v a  2  s  . c  o m*/
    Field modifiers = osNameField.getClass().getDeclaredField("modifiers");
    modifiers.setAccessible(true);
    modifiers.setInt(osNameField, osNameField.getModifiers() & ~Modifier.FINAL);
    osNameField.set(null, mockedOsName);
}

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From source file:com.coinblesk.client.utils.ClientUtils.java

private static void setFinalStatic(Field field, Object newValue) throws Exception {
    field.setAccessible(true);//w ww .  j av a2s .  c  om

    // remove final modifier from field
    try {
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
    } catch (Exception e) {
        Log.w(TAG, "Could not remove 'final' modifier: " + e.getMessage());
    }
    field.set(null, newValue);
}

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From source file:com.orange.clara.cloud.servicedbdumper.task.boot.sequences.BootSequenceSecurity.java

public void removeEncryptionRestriction() {
    if (!isRestrictedCryptography()) {
        logger.info("Cryptography restrictions removal not needed");
        return;//from www  . jav a 2  s.c  om
    }
    try {
        /*
         * Do the following, but with reflection to bypass access checks:
         *
         * JceSecurity.isRestricted = false;
         * JceSecurity.defaultPolicy.perms.clear();
         * JceSecurity.defaultPolicy.add(CryptoAllPermission.INSTANCE);
         */
        final Class<?> jceSecurity = Class.forName("javax.crypto.JceSecurity");
        final Class<?> cryptoPermissions = Class.forName("javax.crypto.CryptoPermissions");
        final Class<?> cryptoAllPermission = Class.forName("javax.crypto.CryptoAllPermission");

        final Field isRestrictedField = jceSecurity.getDeclaredField("isRestricted");
        isRestrictedField.setAccessible(true);
        final Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(isRestrictedField, isRestrictedField.getModifiers() & ~Modifier.FINAL);
        isRestrictedField.set(null, false);

        final Field defaultPolicyField = jceSecurity.getDeclaredField("defaultPolicy");
        defaultPolicyField.setAccessible(true);
        final PermissionCollection defaultPolicy = (PermissionCollection) defaultPolicyField.get(null);

        final Field perms = cryptoPermissions.getDeclaredField("perms");
        perms.setAccessible(true);
        ((Map<?, ?>) perms.get(defaultPolicy)).clear();

        final Field instance = cryptoAllPermission.getDeclaredField("INSTANCE");
        instance.setAccessible(true);
        defaultPolicy.add((Permission) instance.get(null));

        logger.info("Successfully removed cryptography restrictions");
    } catch (final Exception e) {
        logger.warn("Failed to remove cryptography restrictions", e);
    }
}

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From source file:org.modeshape.rhq.util.I18n.java

/**
 * Should be called in a <code>static</code> block to load the properties file and assign values to the class string fields.
 * /*w ww  . jav  a2  s . c om*/
 * @throws IllegalStateException if there is a problem reading the I8n class file or properties file
 */
protected void initialize() {
    final Map<String, Field> fields = new HashMap<String, Field>();

    // collect all public, static, non-final, string fields
    try {
        for (final Field field : getClass().getDeclaredFields()) {
            final int modifiers = field.getModifiers();

            if ((field.getType() == String.class) && ((modifiers & Modifier.PUBLIC) == Modifier.PUBLIC)
                    && ((modifiers & Modifier.STATIC) == Modifier.STATIC)
                    && ((modifiers & Modifier.FINAL) != Modifier.FINAL)) {
                fields.put(field.getName(), field);
            }
        }
    } catch (final Exception e) {
        throw new IllegalStateException(I18n.bind(UtilI18n.problemLoadingI18nClass, getClass().getName()), e);
    }

    // return if nothing to do
    if (ToolBox.isEmpty(fields)) {
        return;
    }

    // load properties file
    InputStream stream = null;
    IllegalStateException problem = null;

    try {
        final Class<? extends I18n> thisClass = getClass();
        final String bundleName = thisClass.getName().replaceAll("\\.", "/").concat(".properties"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        final URL url = thisClass.getClassLoader().getResource(bundleName);
        stream = url.openStream();

        final Collection<String> errors = new ArrayList<String>();
        final Properties props = new I18nProperties(fields, thisClass, errors);
        props.load(stream);

        // log errors for any properties keys that don't have fields
        for (final String error : errors) {
            if (problem == null) {
                problem = new IllegalStateException(error);
            }

            this.logger.error(error);
        }

        // log errors for any fields that don't have properties
        for (final String fieldName : fields.keySet()) {
            final String error = I18n.bind(UtilI18n.missingPropertiesKey, fieldName, getClass().getName());

            if (problem == null) {
                problem = new IllegalStateException(error);
            }

            this.logger.error(error);
        }
    } catch (final Exception e) {
        throw new IllegalStateException(I18n.bind(UtilI18n.problemLoadingI18nProperties, getClass().getName()),
                e);
    } finally {
        if (stream != null) {
            try {
                stream.close();
            } catch (final Exception e) {
            } finally {
                stream = null;
            }
        }

        if (problem != null) {
            throw problem;
        }
    }
}

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