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How to use findSingleFieldUsingStrategy method of org.powermock.reflect.internal.WhiteboxImpl class

Best Powermock code snippet using org.powermock.reflect.internal.WhiteboxImpl.findSingleFieldUsingStrategy

Source:WhiteboxImpl.java

...62     * @return the field63     */64    private static Field findFieldInHierarchy(Object object, FieldMatcherStrategy strategy) {65        assertObjectInGetInternalStateIsNotNull(object);66        return findSingleFieldUsingStrategy(strategy, object, true, getType(object));67    }68    /**69     * Assert object in get internal state is not null.70     *71     * @param object the object72     */73    private static void assertObjectInGetInternalStateIsNotNull(Object object) {74        if (object == null) {75            throw new IllegalArgumentException("The object containing the field cannot be null");76        }77    }78    /**79     * Find single field using strategy.80     *81     * @param strategy       the strategy82     * @param object         the object83     * @param checkHierarchy the check hierarchy84     * @param startClass     the start class85     * @return the field86     */87    private static Field findSingleFieldUsingStrategy(FieldMatcherStrategy strategy, Object object,88                                                      boolean checkHierarchy, Class<?> startClass) {89        assertObjectInGetInternalStateIsNotNull(object);90        Field foundField = null;91        final Class<?> originalStartClass = startClass;92        while (startClass != null) {93            final Field[] declaredFields = startClass.getDeclaredFields();94            for (Field field : declaredFields) {95                if (strategy.matches(field) && hasFieldProperModifier(object, field)) {96                    if (foundField != null) {97                        throw new TooManyFieldsFoundException("Two or more fields matching " + strategy + ".");98                    }99                    foundField = field;100                }101            }102            if (foundField != null) {103                break;104            } else if (!checkHierarchy) {105                break;106            }107            startClass = startClass.getSuperclass();108        }109        if (foundField == null) {110            strategy.notFound(originalStartClass, !isClass(object));111            return null;112        }113        foundField.setAccessible(true);114        return foundField;115    }116    /**117     * Checks for field proper modifier.118     *119     * @param object the object120     * @param field  the field121     * @return true, if successful122     */123    private static boolean hasFieldProperModifier(Object object, Field field) {124        return ((object instanceof Class<?> && Modifier.isStatic(field.getModifiers())) || !(object instanceof Class<?> || Modifier125                .isStatic(field.getModifiers())));126    }127    /**128     * Get the value of a field using reflection. This method will traverse the129     * super class hierarchy until the first field of type <tt>fieldType</tt> is130     * found. The value of this field will be returned.131     *132     * @param <T>       the generic type133     * @param object    the object to modify134     * @param fieldType the type of the field135     * @return the internal state136     */137    @SuppressWarnings("unchecked")138    public static <T> T getInternalState(Object object, Class<T> fieldType) {139        Field foundField = findFieldInHierarchy(object, new AssignableToFieldTypeMatcherStrategy(fieldType));140        try {141            return (T) foundField.get(object);142        } catch (IllegalAccessException e) {143            throw new RuntimeException("Internal error: Failed to get field in method getInternalState.", e);144        }145    }146    /**147     * Throw exception if field was not found.148     *149     * @param type      the type150     * @param fieldName the field name151     * @param field     the field152     */153    public static void throwExceptionIfFieldWasNotFound(Class<?> type, String fieldName, Field field) {154        if (field == null) {155            throw new FieldNotFoundException("No field was found with name '" + fieldName + "' in class "156                    + type.getName() + ".");157        }158    }159    /**160     * Gets the type.161     *162     * @param object the object163     * @return The type of the of an object.164     */165    public static Class<?> getType(Object object) {166        Class<?> type = null;167        if (isClass(object)) {168            type = (Class<?>) object;169        } else if (object != null) {170            type = object.getClass();171        }172        return type;173    }174    /**175     * Get field annotated with a particular annotation. This method traverses176     * the class hierarchy when checking for the annotation.177     *178     * @param object         The object to look for annotations. Note that if're you're179     *                       passing an object only instance fields are checked, passing a180     *                       class will only check static fields.181     * @param annotationType The annotation types to look for182     * @return A set of all fields containing the particular annotation(s).183     * @since 1.3184     */185    public static Field getFieldAnnotatedWith(Object object, Class<? extends Annotation> annotationType) {186        return findSingleFieldUsingStrategy(new FieldAnnotationMatcherStrategy(annotationType), object, true,187                getType(object));188    }189    /**190     * Checks if is class.191     *192     * @param argument the argument193     * @return a boolean.194     */195    public static boolean isClass(Object argument) {196        return argument instanceof Class<?>;197    }198    /**199     * <p>getByNameAndType.</p>200     *201     * @param object a {@link java.lang.Object} object.202     * @param fieldName a {@link java.lang.String} object.203     * @param expectedFieldType a {@link java.lang.Class} object.204     * @param <T> a T object.205     * @return a T object.206     */207    @SuppressWarnings("unchecked")208    public static <T> T getByNameAndType(Object object, String fieldName, Class<T> expectedFieldType) {209        Field foundField = findSingleFieldUsingStrategy(new FieldNameAndTypeMatcherStrategy(fieldName,210                expectedFieldType), object, true, getType(object));211        try {212            return (T) foundField.get(object);213        } catch (IllegalAccessException e) {214            throw new RuntimeException("Internal error: Failed to get field in method getInternalState.", e);215        }216    }217}...

findSingleFieldUsingStrategy

Using AI Code Generation

1import org.powermock.reflect.internal.WhiteboxImpl;2import org.powermock.reflect.exceptions.FieldNotFoundException;3public class WhiteboxImplTest {4    private static class TestClass {5        private String testField;6        private String testField2;7        public TestClass(String testField, String testField2) {8            this.testField = testField;9            this.testField2 = testField2;10        }11    }12    public static void main(String[] args) {13        TestClass testClass = new TestClass("testField", "testField2");14        try {15            String testField = WhiteboxImpl.findSingleFieldUsingStrategy(testClass, String.class, "testField");16            System.out.println(testField);17        } catch (FieldNotFoundException e) {18            System.out.println("Field not found");19        }20    }21}

findSingleFieldUsingStrategy

Using AI Code Generation

1org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();2final java.lang.reflect.Field field = whiteboxImpl.findSingleFieldUsingStrategy(clazz, name, ignoreCase);3org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();4final java.lang.reflect.Field field = whiteboxImpl.getField(clazz, name);5org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();6final java.lang.reflect.Field[] fields = whiteboxImpl.getFields(clazz);7org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();8final java.lang.reflect.Field[] fields = whiteboxImpl.getFieldsIncludingInherited(clazz);9org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();10final java.lang.Object fieldValue = whiteboxImpl.getFieldValue(object, name);11org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();12final java.lang.Object fieldValue = whiteboxImpl.getFieldValue(object, name, ignoreCase);13org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();14final java.lang.Object internalState = whiteboxImpl.getInternalState(object, name);15org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();16final java.lang.Object internalState = whiteboxImpl.getInternalState(object, name, ignoreCase);17org.powermock.reflect.internal.WhiteboxImpl whiteboxImpl = new org.powermock.reflect.internal.WhiteboxImpl();18final java.lang.reflect.Method method = whiteboxImpl.getMethod(clazz

findSingleFieldUsingStrategy

Using AI Code Generation

1import org.powermock.reflect.internal.WhiteboxImpl;2public class WhiteboxImplTest {3    public static void main(String[] args) {4        String value = WhiteboxImpl.findSingleFieldUsingStrategy(MyClass.class, String.class, "myField");5        System.out.println(value);6    }7    private static class MyClass {8        private static String myField = "Hello World";9    }10}

findSingleFieldUsingStrategy

Using AI Code Generation

1public void testFindSingleFieldUsingStrategy() throws Exception {2    System.out.println("findSingleFieldUsingStrategy");3    Object target = null;4    String fieldName = "defaultStrategy";5    Class<?> fieldType = WhiteboxImpl.class;6    boolean ignoreHierarchy = false;7    boolean ignoreStatic = false;8    Object expResult = null;9    Object result = WhiteboxImpl.findSingleFieldUsingStrategy(target, fieldName, fieldType, ignoreHierarchy, ignoreStatic);10    assertEquals(expResult, result);11}12public void testFindSingleFieldUsingStrategy2() throws Exception {13    System.out.println("findSingleFieldUsingStrategy");14    Object target = new WhiteboxImpl();15    String fieldName = "field";16    Class<?> fieldType = WhiteboxImpl.class;17    boolean ignoreHierarchy = false;18    boolean ignoreStatic = false;19    Object expResult = null;20    Object result = WhiteboxImpl.findSingleFieldUsingStrategy(target, fieldName, fieldType, ignoreHierarchy, ignoreStatic);21    assertEquals(expResult, result);22}23public void testFindSingleFieldUsingStrategy3() throws Exception {24    System.out.println("findSingleFieldUsingStrategy");25    Object target = null;26    String fieldName = "defaultStrategy";27    Class<?> fieldType = WhiteboxImpl.class;28    boolean ignoreHierarchy = true;29    boolean ignoreStatic = false;30    Object expResult = null;31    Object result = WhiteboxImpl.findSingleFieldUsingStrategy(target, fieldName, fieldType, ignoreHierarchy, ignoreStatic);32    assertEquals(expResult, result);33}34public void testFindSingleFieldUsingStrategy4() throws Exception {35    System.out.println("findSingleFieldUsingStrategy");36    Object target = new WhiteboxImpl();37    String fieldName = "field";38    Class<?> fieldType = WhiteboxImpl.class;39    boolean ignoreHierarchy = true;40    boolean ignoreStatic = false;41    Object expResult = null;

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