Example usage for java.lang Class getDeclaredField

Introduction

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

Prototype

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

Source Link

Document

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

Usage

From source file:com.twinsoft.convertigo.engine.util.CarUtils.java

private static Document exportProject(Project project, final List<TestCase> selectedTestCases)
        throws EngineException {
    try {//from w w w.  ja v a2s. co  m
        final Document document = XMLUtils.getDefaultDocumentBuilder().newDocument();
        //            ProcessingInstruction pi = document.createProcessingInstruction("xml", "version=\"1.0\" encoding=\"UTF-8\"");
        //            document.appendChild(pi);
        final Element rootElement = document.createElement("convertigo");

        rootElement.setAttribute("version", com.twinsoft.convertigo.engine.Version.fullProductVersion);
        rootElement.setAttribute("engine", com.twinsoft.convertigo.engine.Version.version);
        rootElement.setAttribute("beans", com.twinsoft.convertigo.beans.Version.version);
        String studioVersion = "";
        try {
            Class<?> c = Class.forName("com.twinsoft.convertigo.eclipse.Version");
            studioVersion = (String) c.getDeclaredField("version").get(null);
        } catch (Exception e) {
        } catch (Throwable th) {
        }

        rootElement.setAttribute("studio", studioVersion);
        document.appendChild(rootElement);

        new WalkHelper() {
            protected Element parentElement = rootElement;

            @Override
            protected void walk(DatabaseObject databaseObject) throws Exception {
                Element parentElement = this.parentElement;

                Element element = parentElement;
                element = databaseObject.toXml(document);
                String name = " : " + databaseObject.getName();
                try {
                    name = CachedIntrospector.getBeanInfo(databaseObject.getClass()).getBeanDescriptor()
                            .getDisplayName() + name;
                } catch (IntrospectionException e) {
                    name = databaseObject.getClass().getSimpleName() + name;
                }
                Integer depth = (Integer) document.getUserData("depth");
                if (depth == null) {
                    depth = 0;
                }

                String openpad = StringUtils.repeat("   ", depth);
                String closepad = StringUtils.repeat("   ", depth);
                parentElement.appendChild(document.createTextNode("\n"));
                parentElement.appendChild(
                        document.createComment(StringUtils.rightPad(openpad + "<" + name + ">", 150)));

                if (databaseObject instanceof TestCase && selectedTestCases.size() > 0) {
                    if (selectedTestCases.contains((TestCase) databaseObject)) {
                        parentElement.appendChild(element);
                    }
                } else {
                    parentElement.appendChild(element);
                }

                document.setUserData("depth", depth + 1, null);

                this.parentElement = element;
                super.walk(databaseObject);

                element.appendChild(document.createTextNode("\n"));
                element.appendChild(
                        document.createComment(StringUtils.rightPad(closepad + "</" + name + ">", 150)));
                document.setUserData("depth", depth, null);

                databaseObject.hasChanged = false;
                databaseObject.bNew = false;

                this.parentElement = parentElement;
            }

        }.init(project);

        return document;
    } catch (Exception e) {
        throw new EngineException("Unable to export the project \"" + project.getName() + "\".", e);
    }
}

---

From source file:com.expressui.core.util.ReflectionUtil.java

/**
 * Finds field on a given type./*from  w  w w.ja va2s . c  o m*/
 *
 * @param type      class containing the field
 * @param fieldName name of field to search for
 * @return found field
 */
public static Field getField(Class type, String fieldName) {
    Field field = null;
    Class currentType = type;
    while (field == null && !currentType.equals(Object.class)) {
        try {
            field = currentType.getDeclaredField(fieldName);
        } catch (SecurityException e) {
            throw new RuntimeException(e);
        } catch (NoSuchFieldException e) {
            currentType = currentType.getSuperclass();
        }
    }

    return field;
}

---

From source file:IntrospectionUtil.java

protected static Field findInheritedField(Package pack, Class clazz, String fieldName, Class fieldType,
        boolean strictType) throws NoSuchFieldException {
    if (clazz == null)
        throw new NoSuchFieldException("No class");
    if (fieldName == null)
        throw new NoSuchFieldException("No field name");
    try {/*from   w  w w  .j a v  a2  s. com*/
        Field field = clazz.getDeclaredField(fieldName);
        if (isInheritable(pack, field) && isTypeCompatible(fieldType, field.getType(), strictType))
            return field;
        else
            return findInheritedField(clazz.getPackage(), clazz.getSuperclass(), fieldName, fieldType,
                    strictType);
    } catch (NoSuchFieldException e) {
        return findInheritedField(clazz.getPackage(), clazz.getSuperclass(), fieldName, fieldType, strictType);
    }
}

---

From source file:com.oltpbenchmark.util.ClassUtil.java

/**
 * Convert a Enum array to a Field array
 * This assumes that the name of each Enum element corresponds to a data member in the clas
 * @param <E>//www .j  av  a  2s  .co  m
 * @param clazz
 * @param members
 * @return
 * @throws NoSuchFieldException
 */
public static <E extends Enum<?>> Field[] getFieldsFromMembersEnum(Class<?> clazz, E members[])
        throws NoSuchFieldException {
    Field fields[] = new Field[members.length];
    for (int i = 0; i < members.length; i++) {
        fields[i] = clazz.getDeclaredField(members[i].name().toLowerCase());
    } // FOR
    return (fields);
}

---

From source file:com.facebook.presto.hive.TestPrestoS3FileSystem.java

@SuppressWarnings("unchecked")
private static <T> T getFieldValue(Object instance, Class<?> clazz, String name, Class<T> type) {
    try {// w  w w .ja  v  a 2 s. c o m
        Field field = clazz.getDeclaredField(name);
        checkArgument(field.getType() == type, "expected %s but found %s", type, field.getType());
        field.setAccessible(true);
        return (T) field.get(instance);
    } catch (ReflectiveOperationException e) {
        throw Throwables.propagate(e);
    }
}

---

From source file:de.beyondjava.angularFaces.core.ELTools.java

private static Field getField(String p_expression) {
    synchronized (fields) {
        if (fields.containsKey(p_expression)) {
            return fields.get(p_expression);
        }//www  .  j a  v a2  s .c o m
    }

    if (p_expression.startsWith("#{") && p_expression.endsWith("}")) {
        int delimiterPos = p_expression.lastIndexOf('.');
        if (delimiterPos < 0) {
            LOGGER.log(Level.WARNING, "There's no field to access: #{" + p_expression + "}");
            return null;
        }
        String beanExp = p_expression.substring(0, delimiterPos) + "}";
        String fieldName = p_expression.substring(delimiterPos + 1, p_expression.length() - 1);
        Object container = evalAsObject(beanExp);
        if (null == container) {
            LOGGER.severe("Can't read the bean '" + beanExp
                    + "'. Thus JSR 303 annotations can't be read, let alone used by the AngularDart client.");
            return null;
        }

        Class<? extends Object> c = container.getClass();
        while (c != null) {
            Field declaredField;
            try {
                declaredField = c.getDeclaredField(fieldName);
                synchronized (fields) {
                    fields.put(p_expression, declaredField);
                }
                return declaredField;
            } catch (NoSuchFieldException e) {
                // let\"s try with the super class
                c = c.getSuperclass();
            } catch (SecurityException e) {
                LOGGER.log(Level.SEVERE, "Unable to access a field", e);
                e.printStackTrace();
                return null;
            }
        }
    }
    return null;
}

---

From source file:org.openmrs.module.distrotools.test.TestUtils.java

/**
 * Modifies a constant in a constants class. If the constant is final and not based on a runtime expression, then
 * it's value will have been inlined by the compiler and this method will have no effect.
 * @param constantsClass the class of constants
 * @param fieldName the field name of the constant
 * @param newValue the new value for the constant
 * @throws Exception if field not found or couldn't be modified
 *//*from w ww.j a v  a2  s  .c  o m*/
public static void modifyConstant(Class<?> constantsClass, String fieldName, Object newValue) throws Exception {
    Field field = constantsClass.getDeclaredField(fieldName);
    field.setAccessible(true);

    int existingModifiers = field.getModifiers();

    // Remove final modifier from field
    Field modifiersField = Field.class.getDeclaredField("modifiers");
    modifiersField.setAccessible(true);
    modifiersField.setInt(field, existingModifiers & ~Modifier.FINAL);

    field.set(null, newValue);

    // Reset previous modifiers
    modifiersField.setInt(field, existingModifiers);
}

---

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

public static void setField(Object obj, String fieldName, Object value)
        throws NoSuchFieldException, IllegalArgumentException {
    Class<?> clazz = obj.getClass();

    Field field = clazz.getDeclaredField(fieldName);
    field.setAccessible(true);/*from ww w.j a v  a2s .co  m*/

    try {
        field.set(obj, value);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}

---

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

public static Object getField(Object obj, String fieldName)
        throws NoSuchFieldException, IllegalArgumentException {
    Class<?> clazz = obj.getClass();

    Field field = clazz.getDeclaredField(fieldName);
    field.setAccessible(true);//www  .  j  a  v a  2  s  .c o m

    try {
        return field.get(obj);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }

    return null;
}

---

From source file:hu.javaforum.commons.ReflectionHelper.java

/**
 * Gets the the field.//from w  w  w .  j ava 2 s . com
 *
 * @param objectClass The object
 * @param fieldName The field name of the object
 * @return The class
 * @exception NoSuchFieldException Throws, when the field isn't exists
 */
public static Field getField(final Class objectClass, final String fieldName) throws NoSuchFieldException {
    Field field;
    if ("return".equals(fieldName)) {
        field = objectClass.getDeclaredField("_" + fieldName);
    } else {
        field = objectClass.getDeclaredField(fieldName);
    }

    return field;
}

---

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