Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use forEachField method of com.tngtech.jgiven.impl.util.ReflectionUtil class

Best JGiven code snippet using com.tngtech.jgiven.impl.util.ReflectionUtil.forEachField

Source:ReflectionUtil.java

...25    /**26     * Iterates over all fields of the given class and all its super classes27     * and calls action.act() for the fields that are annotated with the given annotation.28     */29    public static void forEachField( final Object object, Class<?> clazz, final FieldPredicate predicate, final FieldAction action ){30        forEachSuperClass( clazz, clazzAction -> {31            for( Field field : clazzAction.getDeclaredFields() ) {32                if( predicate.isTrue( field ) ) {33                    action.act( object, field );34                }35            }36        } );37    }38    /**39     * Iterates over all methods of the given class and all its super classes40     * and calls action.act() for the methods that are annotated with the given annotation.41     */42    public static void forEachMethod( final Object object, Class<?> clazz, final Class<? extends Annotation> annotation,43            final MethodAction action ){44        forEachSuperClass( clazz, clazzAction -> {45            for( Method method : clazzAction.getDeclaredMethods() ) {46                if( method.isAnnotationPresent( annotation ) ) {47                    action.act( object, method );48                }49            }50        } );51    }52    /**53     * Iterates over all super classes of the given class (including the class itself)54     * and calls action.act() for these classes.55     */56    public static void forEachSuperClass( Class<?> clazz, ClassAction action ){57        try {58            action.act( clazz );59            Class<?> superclass = clazz.getSuperclass();60            if( superclass != null ) {61                forEachSuperClass( superclass, action );62            }63        } catch( Exception e ) {64            throw Throwables.propagate( e );65        }66    }67    public static FieldPredicate hasAtLeastOneAnnotation( final Class<? extends Annotation>... annotation ){68        return field -> {69            for( Class<? extends Annotation> clazz : annotation ) {70                if( field.isAnnotationPresent( clazz ) ) {71                    return true;72                }73            }74            return false;75        };76    }77    public static FieldPredicate allFields(){78        return field -> true;79    }80    public static FieldPredicate nonStaticField(){81        return field -> !Modifier.isStatic( field.getModifiers() );82    }83    public static boolean hasConstructor( Class<?> type, Class<?>... parameterTypes ){84        try {85            type.getDeclaredConstructor( parameterTypes );86            return true;87        } catch( NoSuchMethodException e ) {88            return false;89        }90    }91    public interface FieldPredicate {92        boolean isTrue( Field field ) throws Exception;93    }94    public interface ClassAction {95        void act( Class<?> clazz ) throws Exception;96    }97    public interface FieldAction {98        void act( Object object, Field field ) throws Exception;99    }100    public interface MethodAction {101        void act( Object object, Method method ) throws Exception;102    }103    public static Optional<Method> findMethodTransitively( Class<?> clazz, String methodName ){104        if( clazz == null ) {105            return Optional.empty();106        }107        try {108            return Optional.of( clazz.getDeclaredMethod( methodName ) );109        } catch( NoSuchMethodException e ) {110            return findMethodTransitively( clazz.getSuperclass(), methodName );111        }112    }113    public static <T> T newInstance( Class<T> type ){114        return newInstance( type, new Class<?>[0] );115    }116    public static <T> T newInstance( Class<T> type, Class<?>[] parameterTypes, Object... parameterValues ){117        try {118            Constructor<T> constructor = type.getDeclaredConstructor( parameterTypes );119            constructor.setAccessible( true );120            return constructor.newInstance( parameterValues );121        } catch( InstantiationException e ) {122            throw new RuntimeException( e );123        } catch( IllegalAccessException e ) {124            throw new RuntimeException( e );125        } catch( NoSuchMethodException e ) {126            throw new RuntimeException( e );127        } catch( InvocationTargetException e ) {128            throw new RuntimeException( e );129        }130    }131    public static void invokeMethod( Object object, Method method, String errorDescription ){132        log.debug( "Executing method %s of class %s", method, object.getClass() );133        makeAccessible( method, errorDescription );134        try {135            method.invoke( object );136        } catch( IllegalArgumentException e ) {137            log.debug( "Caught exception:", e );138            throw new JGivenExecutionException( "Could not execute " + toReadableString( method ) + errorDescription +139                    ", because it requires parameters. " + "Remove the parameters and try again.", e );140        } catch( IllegalAccessException e ) {141            log.debug( "Caught exception:", e );142            throw new JGivenExecutionException( "Could not execute " + toReadableString( method ) + errorDescription +143                    ", because of insuffient access rights. "144                    + "Either make the method public or disable your security manager while executing JGiven tests.", e );145        } catch( InvocationTargetException e ) {146            throw new JGivenUserException( method, errorDescription, e.getCause() );147        }148    }149    /**150     * Returns a {@link List} of objects reflecting all the non-static field values declared by the class or interface151     * represented by the given {@link Class} object and defined by the given {@link Object}. This includes152     * {@code public}, {@code protected}, default (package) access, and {@code private} fields, but excludes inherited153     * fields. The elements in the {@link List} returned are not sorted and are not in any particular order. This method154     * returns an empty {@link List} if the class or interface declares no fields, or if the given {@link Class} object155     * represents a primitive type, an array class, or void.156     *157     * @param clazz class or interface declaring fields158     * @param target instance of given {@code clazz} from which field values should be retrieved159     * @param errorDescription customizable part of logged error message160     * @return a {@link List} containing all the found field values (never {@code null})161     */162    public static List<Object> getAllNonStaticFieldValuesFrom( final Class<?> clazz, final Object target, final String errorDescription ){163        return getAllFieldValues( target, getAllNonStaticFields( clazz ), errorDescription );164    }165    private static Function<Field, Object> getFieldValueFunction( final Object target, final String errorDescription ){166        return field -> getFieldValueOrNull( field, target, errorDescription );167    }168    public static Object getFieldValueOrNull( String fieldName, Object target, String errorDescription ){169        try {170            Field field = target.getClass().getDeclaredField( fieldName );171            return getFieldValueOrNull( field, target, errorDescription );172        } catch( Exception e ) {173            log.warn(174                    format( "Not able to access field '%s'." + errorDescription, fieldName ), e );175            return null;176        }177    }178    public static Object getFieldValueOrNull( Field field, Object target, String errorDescription ){179        makeAccessible( field, "" );180        try {181            return field.get( target );182        } catch( IllegalAccessException e ) {183            log.warn(184                    format( "Not able to access field '%s'." + errorDescription, toReadableString( field ) ), e );185            return null;186        }187    }188    public static List<Field> getAllNonStaticFields( Class<?> clazz ){189        final List<Field> result = Lists.newArrayList();190        forEachField( null, clazz, nonStaticField(), new FieldAction() {191            @Override192            public void act( Object target, Field field ) throws Exception{193                result.add( field );194            }195        } );196        return result;197    }198    public static List<Object> getAllFieldValues( Object target, Iterable<Field> fields, String errorDescription ){199        return StreamSupport.stream( fields.spliterator(), false )200                .map( getFieldValueFunction( target, errorDescription ) )201                .collect( Collectors.toList() );202    }203    public static List<String> getAllFieldNames( Iterable<Field> fields ){204        return StreamSupport.stream( fields.spliterator(), false )...

Source:FieldCache.java

...28        List<Class<? extends Annotation>> annotationList = ImmutableList.copyOf( scenarioStageClasses );29        List<Field> fields = fieldMap.get( annotationList );30        if( fields == null ) {31            final List<Field> newFields = Lists.newArrayList();32            ReflectionUtil.forEachField( null, clazz,33                ReflectionUtil.hasAtLeastOneAnnotation( scenarioStageClasses ),34                new ReflectionUtil.FieldAction() {35                    @Override36                    public void act( Object object, Field field ) throws Exception {37                        field.setAccessible( true );38                        newFields.add( field );39                    }40                }41                );42            fieldMap.put( annotationList, newFields );43            return newFields;44        }45        return fields;46    }...

forEachField

Using AI Code Generation

1import com.tngtech.jgiven.impl.util.ReflectionUtil;2import java.lang.reflect.Field;3import java.util.List;4public class Test {5    public static void main(String[] args) {6        List<Field> fields = ReflectionUtil.forEachField(Test.class, field -> {7            return true;8        });9        System.out.println(fields);10    }11}

forEachField

Using AI Code Generation

1import com.tngtech.jgiven.impl.util.ReflectionUtil;2import com.tngtech.jgiven.report.model.*;3import java.lang.reflect.Field;4import java.util.List;5import java.util.stream.Collectors;6import java.util.stream.Stream;7public class Test {8    public static void main(String[] args) {9        ReportModel reportModel = new ReportModel();10        reportModel.setScenarios(new ScenarioModel());11        reportModel.getScenarios().setSteps(new StepModel());12        reportModel.getScenarios().getSteps().setAttachments(new AttachmentModel());13        reportModel.getScenarios().getSteps().getAttachments().setFile(new FileModel());14        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileName("File Name");15        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileContent("File Content");16        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileExtension("File Extension");17        reportModel.getScenarios().getSteps().setAttachments(new AttachmentModel());18        reportModel.getScenarios().getSteps().getAttachments().setFile(new FileModel());19        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileName("File Name");20        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileContent("File Content");21        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileExtension("File Extension");22        reportModel.getScenarios().getSteps().setAttachments(new AttachmentModel());23        reportModel.getScenarios().getSteps().getAttachments().setFile(new FileModel());24        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileName("File Name");25        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileContent("File Content");26        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileExtension("File Extension");27        reportModel.getScenarios().getSteps().setAttachments(new AttachmentModel());28        reportModel.getScenarios().getSteps().getAttachments().setFile(new FileModel());29        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileName("File Name");30        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileContent("File Content");31        reportModel.getScenarios().getSteps().getAttachments().getFile().setFileExtension("File Extension");

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.