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com.araguacaima.commons.utils.ReflectionUtils Maven / Gradle / Ivy
/*
* Copyright 2017 araguacaima
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.araguacaima.commons.utils;
import com.google.common.collect.ObjectArrays;
import io.github.benas.randombeans.EnhancedRandomBuilder;
import io.github.benas.randombeans.api.EnhancedRandom;
import javassist.CannotCompileException;
import javassist.CtClass;
import javassist.CtMethod;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.IterableUtils;
import org.apache.commons.collections4.Predicate;
import org.apache.commons.collections4.Transformer;
import org.apache.commons.lang3.builder.StandardToStringStyle;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sun.reflect.ConstructorAccessor;
import sun.reflect.FieldAccessor;
import sun.reflect.ReflectionFactory;
import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.lang.annotation.Annotation;
import java.lang.reflect.*;
import java.nio.charset.StandardCharsets;
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.*;
@SuppressWarnings({"unchecked", "UnusedReturnValue"})
public class ReflectionUtils implements Serializable {
public static final List BASIC_CLASSES = Arrays.asList(String.class,
Boolean.class,
Character.class,
Byte.class,
Short.class,
Integer.class,
Long.class,
Float.class,
Double.class);
public static final Transformer CLASS_FROM_OBJECT_TRANSFORMER = Object::getClass;
public static final Transformer CLASS_NAME_TRANSFORMER = Class::getName;
public static final Collection COMMONS_JAVA_TYPES_EXCLUSIONS = new ArrayList() {
{
add("java.util.Currency");
add("java.util.Calendar");
add("org.joda.time.Period");
}
};
public static final Collection COMMONS_TYPES_PREFIXES = new ArrayList() {
{
add("java.lang");
add("java.util");
add("java.math");
add("java.io");
add("java.sql");
add("java.text");
add("java.net");
add("org.joda.time");
}
};
public static final Transformer FIELD_NAME_TRANSFORMER = Field::getName;
public static final Predicate METHOD_IS_GETTER_PREDICATE = method -> method.getName().matches
("get[A-Z]+.*") || method.getName().matches(
"is[A-Z]+.*");
public static final Predicate METHOD_IS_SETTER_PREDICATE = method -> method.getName().matches("set[A-Z]+.*");
public static final Transformer METHOD_NAME_TRANSFORMER = Method::getName;
public static final Map PRIMITIVE_AND_BASIC_TYPES = new HashMap();
public static final Map PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES = new HashMap();
public static final Map PRIMITIVE_NAMES_BASIC_CLASS = new HashMap<>();
public static final Map PRIMITIVE_NAMES_BASIC_TYPES = new HashMap<>();
public static final List PRIMITIVE_TYPES = Arrays.asList(Boolean.TYPE,
Character.TYPE,
Byte.TYPE,
Short.TYPE,
Integer.TYPE,
Long.TYPE,
Float.TYPE,
Double.TYPE,
Void.TYPE);
public static final String UNKNOWN_VALUE = "UNKNOWN_VALUE";
private static final Collection COMMONS_COLLECTIONS_IMPLEMENTATIONS = new ArrayList() {
{
add(ArrayList.class);
add(TreeSet.class);
add(HashSet.class);
add(LinkedHashSet.class);
add(LinkedList.class);
}
};
private static final FieldCompare FIELD_COMPARE = new FieldCompare();
private static final DataTypesConverter dataTypesConverter = new DataTypesConverter();
private static final Logger log = LoggerFactory.getLogger(ReflectionUtils.class);
private static final EnhancedRandomBuilder randomBuilder;
private static final ReflectionUtils INSTANCE = new ReflectionUtils();
static {
final StandardToStringStyle tiesStyle = new StandardToStringStyle();
tiesStyle.setArrayContentDetail(true);
//Sets whether to output array content detail.
tiesStyle.setArrayEnd("]");
//Sets the array end text.
tiesStyle.setArraySeparator(",");
//Sets the array separator text.
tiesStyle.setArrayStart("[");
//Sets the array start text.
tiesStyle.setContentEnd("\n");
//Sets the content end text.
tiesStyle.setContentStart("\n");
//Sets the content start text.
tiesStyle.setDefaultFullDetail(true);
//Sets whether to use full detail when the caller doesn't specify.
tiesStyle.setFieldNameValueSeparator(" = ");
//Sets the field name value separator text.
tiesStyle.setFieldSeparator("\n");
//Sets the field separator text.
tiesStyle.setFieldSeparatorAtEnd(false);
//Sets whether the field separator should be added at the end of each buffer.
tiesStyle.setFieldSeparatorAtStart(false);
//Sets whether the field separator should be added at the start of each buffer.
tiesStyle.setNullText("null");
//Sets the text to output when null found.
tiesStyle.setUseClassName(true);
//Sets whether to use the class name.
tiesStyle.setUseFieldNames(true);
//Sets whether to use the field names passed in.
tiesStyle.setUseIdentityHashCode(false);
//Sets whether to use the identity hash code.
tiesStyle.setUseShortClassName(true);
//Sets whether to output short or long class names.
tiesStyle.setArrayContentDetail(true);
//Sets whether to output array content detail.
tiesStyle.setDefaultFullDetail(true);
//Sets whether to use full detail when the caller doesn't specify.
ToStringBuilder.setDefaultStyle(tiesStyle);
PRIMITIVE_AND_BASIC_TYPES.put(Boolean.TYPE, Boolean.class);
PRIMITIVE_AND_BASIC_TYPES.put(Character.TYPE, Character.class);
PRIMITIVE_AND_BASIC_TYPES.put(Byte.TYPE, Byte.class);
PRIMITIVE_AND_BASIC_TYPES.put(Short.TYPE, Short.class);
PRIMITIVE_AND_BASIC_TYPES.put(Integer.TYPE, Integer.class);
PRIMITIVE_AND_BASIC_TYPES.put(Long.TYPE, Long.class);
PRIMITIVE_AND_BASIC_TYPES.put(Float.TYPE, Float.class);
PRIMITIVE_AND_BASIC_TYPES.put(Double.TYPE, Double.class);
PRIMITIVE_NAMES_BASIC_TYPES.put("int", Integer.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("long", Long.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("double", Double.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("float", Float.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("boolean", Boolean.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("char", Character.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("byte", Byte.TYPE);
PRIMITIVE_NAMES_BASIC_TYPES.put("short", Short.TYPE);
PRIMITIVE_NAMES_BASIC_CLASS.put("int", Integer.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("long", Long.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("double", Double.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("float", Float.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("boolean", Boolean.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("char", Character.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("byte", Byte.class);
PRIMITIVE_NAMES_BASIC_CLASS.put("short", Short.class);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Boolean.TYPE, Boolean.FALSE);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Character.TYPE, ' ');
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Byte.TYPE, (byte) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Short.TYPE, (short) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Integer.TYPE, -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Long.TYPE, (long) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Float.TYPE, (float) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Double.TYPE, (double) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Boolean.class, Boolean.FALSE);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Character.class, ' ');
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Byte.class, (byte) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Short.class, (short) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Integer.class, -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Long.class, (long) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Float.class, (float) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(Double.class, (double) -1);
PRIMITIVE_AND_BASIC_TYPE_DEFAULT_VALUES.put(String.class, StringUtils.EMPTY);
LocalTime timeLower = LocalTime.of(0, 0);
LocalTime timeUpper = LocalTime.of(0, 0);
LocalDate dateLower = LocalDate.of(2000, 1, 1);
LocalDate dateUpper = LocalDate.of(2040, 12, 31);
randomBuilder = EnhancedRandomBuilder.aNewEnhancedRandomBuilder()
.seed(123L)
.objectPoolSize(100)
.charset(StandardCharsets.UTF_8)
.timeRange(timeLower, timeUpper)
.dateRange(dateLower, dateUpper)
.stringLengthRange(5, 20)
.collectionSizeRange(1, 5)
.scanClasspathForConcreteTypes(true)
.overrideDefaultInitialization(true)
.objectPoolSize(3);
}
private final ReflectionFactory reflectionFactory = ReflectionFactory.getReflectionFactory();
private StringUtils stringUtils;
;
private ReflectionUtils() {
if (INSTANCE != null) {
throw new IllegalStateException("Already instantiated");
}
}
public static ReflectionUtils getInstance() {
return INSTANCE;
}
public Object clone() throws CloneNotSupportedException {
throw new CloneNotSupportedException("Cannot clone instance of this class");
}
public Object createCollectionObject(Class clazz)
throws IllegalAccessException, InstantiationException {
Class generics = extractGenerics(clazz);
Object bean = generics.newInstance();
Object result;
if (Collection.class.isAssignableFrom(clazz)) {
Type genericSuperclass = clazz.getGenericSuperclass();
if (genericSuperclass == null) {
return new ArrayList();
} else {
result = ((ParameterizedType) genericSuperclass).getActualTypeArguments()[0];
}
try {
((Collection) result).add(bean);
} catch (Exception ignored) {
try {
return clazz.newInstance();
} catch (Throwable ignored_) {
return new ArrayList();
}
}
} else
result = getObject_(clazz, bean, generics);
return result;
}
public Class extractGenerics(Class clazz) {
if (clazz == null) {
return null;
}
if (!isCollectionImplementation(clazz)) {
return clazz;
}
Class generics;
if (Collection.class.isAssignableFrom(clazz)) {
Type genericSuperclass = clazz.getGenericSuperclass();
if (genericSuperclass == null) {
generics = Object.class;
} else {
try {
Object type = ((ParameterizedType) genericSuperclass).getActualTypeArguments()[0];
generics = (Class) type;
} catch (ClassCastException ignored) {
try {
generics = (Class) clazz.getGenericInterfaces()[0];
} catch (Throwable t) {
generics = Object.class;
}
}
}
} else
generics = getClass(clazz);
return generics;
}
private Object getObject_(Class clazz, Object value, Class generics) {
Object result = null;
if (Object[].class.isAssignableFrom(clazz) || clazz.isArray()) {
try {
result = ObjectArrays.newArray(generics, 0);
result = ObjectArrays.concat((Object[]) result, value);
} catch (Exception ignored) {
}
} else {
throw new IllegalArgumentException("Invalid Type. Incoming type must be a collection implementation");
}
return result;
}
public boolean isCollectionImplementation(String className) {
Class collectionClass;
try {
String firstPartType = StringUtils.defaultIfBlank(returnNativeClass(className), className.split("<")[0]);
collectionClass = Class.forName(firstPartType);
} catch (ClassNotFoundException e) {
try {
collectionClass = Class.forName(className);
} catch (ClassNotFoundException ex) {
return false;
}
}
return isCollectionImplementation(collectionClass);
}
public boolean isCollectionImplementation(Class clazz) {
return clazz != null && (Collection.class.isAssignableFrom(clazz) || Object[].class.isAssignableFrom(clazz)
|| clazz.isArray());
}
private Class getClass(Class clazz) {
Class generics = null;
if (Object[].class.isAssignableFrom(clazz)) {
try {
generics = Class.forName(clazz.toString().replaceFirst("class \\[L", StringUtils.EMPTY).replace(";",
StringUtils.EMPTY));
} catch (ClassNotFoundException e) {
log.error(e.getMessage());
}
} else if (clazz.isArray()) {
try {
Method method = Class.class.getDeclaredMethod("getPrimitiveClass", String.class);
method.setAccessible(true);
generics = (Class) method.invoke(Class.forName("java.lang.Class"),
clazz.getSimpleName().replace("[]", StringUtils.EMPTY));
} catch (InvocationTargetException | ClassNotFoundException | NoSuchMethodException |
IllegalAccessException | NullPointerException ignored) {
}
}
return generics;
}
public Class extractGenerics(Field field) {
Class clazz;
final Type genericType = field.getGenericType();
Type[] typeArguments = null;
if (genericType instanceof Class) {
clazz = (Class) genericType;
} else {
clazz = getType(genericType);
}
if (clazz == null) {
clazz = field.getType();
}
return extractGenerics(clazz);
}
private Class getType(Type genericType) {
Type[] typeArguments = null;
Class clazz = null;
try {
Field rawTypeField = genericType.getClass().getDeclaredField("rawType");
rawTypeField.setAccessible(true);
Class clazz_ = (Class) rawTypeField.get(genericType);
typeArguments = ((ParameterizedType) genericType).getActualTypeArguments();
if (isMapImplementation(clazz_)) {
clazz = (Class) typeArguments[1];
} else {
clazz = (Class) typeArguments[0];
}
} catch (ClassCastException ignored) {
Type type = Objects.requireNonNull(typeArguments)[0];
try {
Field rawTypeField = type.getClass().getDeclaredField("rawType");
rawTypeField.setAccessible(true);
clazz = (Class) rawTypeField.get(type);
} catch (NoSuchFieldException | IllegalAccessException e) {
e.printStackTrace();
}
} catch (NoSuchFieldException | NullPointerException | IndexOutOfBoundsException ignored) {
typeArguments = ((TypeVariable) genericType).getBounds();
clazz = (Class) typeArguments[0];
} catch (Throwable ignored) {
}
return clazz;
}
private boolean fieldIsNotContainedIn(Field field, Collection excludeFields) {
return !fieldIsContainedIn(field, excludeFields);
}
private boolean fieldIsContainedIn(Field field, Collection excludeFields) {
return IterableUtils.find(excludeFields, fieldName -> fieldNameEqualsToPredicate(field, fieldName)) != null;
}
private boolean fieldNameEqualsToPredicate(Field field, String fieldName) {
return !StringUtils.isBlank(fieldName) && field.getName().equals(fieldName);
}
private boolean fieldNameIsNotContainedIn(String fieldName, Collection excludeFields) {
return !fieldNameIsContainedIn(fieldName, excludeFields);
}
private boolean fieldNameIsContainedIn(String fieldName, Collection excludeFields) {
return excludeFields.contains(fieldName);
}
public Collection getAllFieldNamesIncludingParents(Class clazz) {
return CollectionUtils.collect(getAllFieldsIncludingParents(clazz,
null,
Modifier.VOLATILE | Modifier.NATIVE | Modifier.TRANSIENT), FIELD_NAME_TRANSFORMER);
}
public Collection getAllFieldsIncludingParents(Class clazz,
final Integer modifiersInclusion,
final Integer modifiersExclusion) {
final Collection fields = new ArrayList<>();
FieldFilter fieldFilterModifierInclusion = field -> modifiersInclusion == null || (field.getModifiers() &
modifiersInclusion) != 0;
FieldFilter fieldFilterModifierExclusion = field -> modifiersExclusion == null || (field.getModifiers() &
modifiersExclusion) == 0;
doWithFields(clazz,
fields::add,
modifiersInclusion == null ? (modifiersExclusion == null ? null : fieldFilterModifierExclusion) :
fieldFilterModifierInclusion);
return fields;
}
public Collection getAllFieldsNamesOfType(Object object, final Class type) {
return getAllFieldsNamesOfType(object.getClass(), null, type);
}
public Collection getAllFieldsNamesOfType(Class clazz,
Collection excludeFields,
final Class type) {
return CollectionUtils.collect(getAllFieldsOfType(clazz, excludeFields, type), FIELD_NAME_TRANSFORMER);
}
public Collection getAllFieldsOfType(Class clazz,
Collection excludeFields,
final Class type) {
final Collection result = new ArrayList();
if (clazz != null) {
IterableUtils.forEach(getAllFieldsIncludingParents(clazz, excludeFields), field -> {
if (field.getType().getName().equals(type.getName())) {
result.add(field);
}
});
}
return result;
}
public Collection getAllFieldsIncludingParents(Class clazz, Collection excludeFields) {
Collection result = getAllFieldsIncludingParents(clazz);
if (CollectionUtils.isEmpty(excludeFields)) {
return result;
}
CollectionUtils.filterInverse(result, field -> fieldIsContainedIn(field, excludeFields));
return result;
}
public Collection getAllFieldsIncludingParents(Class clazz) {
return getAllFieldsIncludingParents(clazz,
null,
Modifier.STATIC | Modifier.VOLATILE | Modifier.NATIVE | Modifier.TRANSIENT);
}
public String getExtractedGenerics(String s) {
String s1 = s.trim();
try {
String firstPartType = s1.split("<")[1];
if (firstPartType.endsWith(">")) {
return firstPartType.substring(0, firstPartType.length() - 1);
}
} catch (Throwable ignored) {
}
return s1;
}
/**
* @param object The object to obtain the class name
* @return The class name
* @deprecated
*/
public String getSimpleClassName(Object object) {
return getSimpleClassName(object.getClass());
}
public String getSimpleClassName(Class clazz) {
String className = null;
if (clazz != null) {
className = clazz.getName();
try {
className = clazz.getName().substring(clazz.getName().lastIndexOf(".") + 1);
className = className.substring(className.lastIndexOf("$") + 1);
className = className.replaceAll(";", "[]");
} catch (Exception e) {
log.error("Impossible to get the simple name for the class: " + clazz.getName() + ". It'll be taken: " +
"" + "" + className);
}
}
return className;
}
public boolean isList(String type) {
try {
boolean result = type.equals("List") || type.startsWith("List<") || type.startsWith("java.util.List<") || type.equals(
"Collection") || type.startsWith("Collection<") || type.startsWith("java.util.Collection<");
if (!result) {
String firstPartType = StringUtils.defaultIfBlank(returnNativeClass(type), type.split("<")[0]);
result = Class.forName(firstPartType) != null;
}
return result;
} catch (Throwable ignored) {
return false;
}
}
public Collection createAndInitializeTypedCollection(Class typedClassForCollection, Object
value)
throws IllegalAccessException, InstantiationException {
Collection result = new ArrayList<>();
if (value == null) {
Object bean = typedClassForCollection.newInstance();
result.add(bean);
} else {
result.add(value);
}
return result;
}
public boolean isMapImplementation(Class clazz) {
return clazz != null && Map.class.isAssignableFrom(clazz);
}
public F deepClone(E e) {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oo;
try {
oo = new ObjectOutputStream(bo);
oo.writeObject(e);
} catch (IOException ex) {
ex.printStackTrace();
}
ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
ObjectInputStream oi;
try {
oi = new ObjectInputStream(bi);
return (F) (oi.readObject());
} catch (IOException | ClassNotFoundException ex) {
ex.printStackTrace();
return null;
}
}
public CtMethod generateGetter(CtClass declaringClass, String fieldName, CtClass fieldClass)
throws CannotCompileException {
Class clazz = fieldClass.getClass();
String prefix = (clazz.getSimpleName().equals("Boolean") || clazz.getTypeName().equals("boolean")) ? "is" :
"get";
String getterName = prefix + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
String sb = "public " + fieldClass.getName() + " " + getterName + "(){" +
"return this." + fieldName + ";" + "}";
return CtMethod.make(sb, declaringClass);
}
public CtMethod generateSetter(CtClass declaringClass, String fieldName, CtClass fieldClass)
throws CannotCompileException {
String setterName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
String sb = "public void " + setterName + "(" + fieldClass.getName() + " " +
fieldName + ")" + "{" + "this." + fieldName + "=" + fieldName +
";" + "}";
return CtMethod.make(sb, declaringClass);
}
public String returnNativeClass(String type) {
Class clazz;
type = type.split("<")[0];
for (String javaTypePrefix : COMMONS_TYPES_PREFIXES) {
try {
clazz = Class.forName(type.contains(".") ? type : javaTypePrefix + "." + type);
return clazz.getName();
} catch (ClassNotFoundException ignored) {
}
}
return null;
}
public String getFullyQualifiedJavaTypeOrNull(String type, boolean considerLists) {
if (type == null) {
return null;
}
DataTypesConverter.DataTypeView dataTypeView = dataTypesConverter.getDataTypeView(type);
type = dataTypeView.getTransformedDataType();
String transformedType;
boolean complexType = DataTypesConverter.DataTypeView.COMPLEX_TYPE.equals(dataTypeView.getDataType());
if (complexType) {
transformedType = type;
} else {
transformedType = StringUtils.capitalize(type);
}
Class clazz;
if (considerLists) {
if (isList(type)) {
String generics = getExtractedGenerics(type);
final String javaType = getFullyQualifiedJavaTypeOrNull(generics, false);
if (StringUtils.isBlank(javaType)) {
return null;
} else {
return "java.util.List<" + javaType + ">";
}
}
}
if (!complexType) {
for (String javaTypePrefix : COMMONS_TYPES_PREFIXES) {
try {
clazz = Class.forName(transformedType.contains(".") ? transformedType : javaTypePrefix + "." +
transformedType);
if (considerLists) {
if (isList(type)) {
return "java.util.List<" + clazz.getName() + ">";
}
}
if (!COMMONS_JAVA_TYPES_EXCLUSIONS.contains(clazz.getName())) {
return clazz.getName();
}
} catch (ClassNotFoundException ignored) {
}
}
}
try {
Method method = Class.class.getDeclaredMethod("getPrimitiveClass", String.class);
method.setAccessible(true);
clazz = (Class) method.invoke(Class.forName("java.lang.Class"), StringUtils.uncapitalize(type));
if (considerLists) {
if (isList(type)) {
return "java.util.List<" + clazz.getName() + ">";
}
}
return clazz.getName();
} catch (InvocationTargetException | ClassNotFoundException | NoSuchMethodException | IllegalAccessException
| NullPointerException ignored) {
}
return null;
}
public String getSimpleJavaTypeOrNull(Class type) {
return getSimpleJavaTypeOrNull(type, true);
}
public String getSimpleJavaTypeOrNull(Class type, boolean considerLists) {
return getSimpleJavaTypeOrNull(type.getSimpleName(), considerLists);
}
public String getSimpleJavaTypeOrNull(String type) {
return getSimpleJavaTypeOrNull(type, true);
}
public String getSimpleJavaTypeOrNull(String type, boolean considerLists) {
String fullyQualifedJavaType = getFullyQualifiedJavaTypeOrNull(type, considerLists);
if (StringUtils.isNotBlank(fullyQualifedJavaType)) {
try {
return Class.forName(fullyQualifedJavaType).getSimpleName();
} catch (ClassNotFoundException ignored) {
}
}
return null;
}
/**
* Add an enum instance to the enum class given as argument
*
* @param the type of the enum (implicit)
* @param type the class of the enum to be modified
* @param name the name of the new enum instance to be added to the class.
* @param value the value for the name of the new enum instance.
* @param description the full description of the new enum instance.
*/
@SuppressWarnings("unchecked")
public > void addEnum(Class type, String name, String value, String description) {
// 0. Sanity checks
if (!Enum.class.isAssignableFrom(type)) {
throw new RuntimeException("class " + type + " is not an instance of Enum");
}
// 1. Lookup "$VALUES" holder in enum class and get previous enum instances
Field valuesField = null;
Field[] fields = type.getDeclaredFields();
for (Field field : fields) {
if (field.getName().equals("enumConstants")) {
valuesField = field;
AccessibleObject.setAccessible(new Field[]{valuesField}, true);
break;
}
}
try {
// 2. Copy it
T[] previousValues;
List values = new ArrayList<>();
if (valuesField != null) {
previousValues = (T[]) valuesField.get(type);
if (previousValues != null) {
values = new ArrayList<>(Arrays.asList(previousValues));
}
}
// 3. build new enum
T newValue; // could be used to pass values to the enum constuctor if needed
newValue = (T) makeEnum(type, // The target enum class
name, value, description,// THE NEW ENUM INSTANCE TO BE DYNAMICALLY ADDED
values.size(), new Class[]{}, // could be used to pass values to the enum constuctor if needed
new Object[]{});
// 4. add new value
values.add(newValue);
// 5. Set new values field
setFailsafeFieldValue(Objects.requireNonNull(valuesField), type, values.toArray((T[]) Array.newInstance(type, 0)));
// 6. Clean enum cache
// cleanEnumCache(type);
} catch (Exception e) {
log.error(e.getMessage());
throw new RuntimeException(e.getMessage(), e);
}
}
private Object makeEnum(Class enumClass,
String name,
String value,
String description,
int ordinal,
Class[] additionalTypes,
Object[] additionalValues)
throws Exception {
Object[] parms = new Object[additionalValues.length + 2];
parms[0] = name;
parms[1] = ordinal;
System.arraycopy(additionalValues, 0, parms, 2, additionalValues.length);
Object o = enumClass.cast(getConstructorAccessor(enumClass, additionalTypes).newInstance(parms));
try {
Method mValue = o.getClass().getMethod("setValue", String.class);
mValue.setAccessible(true);
mValue.invoke(o, value);
Method mDescription = o.getClass().getMethod("setDescription", String.class);
mDescription.setAccessible(true);
mDescription.invoke(o, description);
} catch (Throwable ignored) {
}
return o;
}
private void setFailsafeFieldValue(Field field, Class target, Object value)
throws NoSuchFieldException, IllegalAccessException {
// let's make the field accessible
field.setAccessible(true);
// next we change the modifier in the Field instance to
// not be final anymore, thus tricking reflection into
// letting us modify the final field
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
int modifiers = modifiersField.getInt(field);
// blank out the final bit in the modifiers int
modifiers &= ~Modifier.FINAL;
modifiersField.setInt(field, modifiers);
FieldAccessor fa = reflectionFactory.newFieldAccessor(field, false);
fa.set(target, value);
}
private ConstructorAccessor getConstructorAccessor(Class enumClass, Class[] additionalParameterTypes)
throws NoSuchMethodException {
Class[] parameterTypes = new Class[additionalParameterTypes.length + 2];
parameterTypes[0] = String.class;
parameterTypes[1] = int.class;
System.arraycopy(additionalParameterTypes, 0, parameterTypes, 2, additionalParameterTypes.length);
return reflectionFactory.newConstructorAccessor(enumClass.getDeclaredConstructor(parameterTypes));
}
public boolean allFieldsAreNotEmptyOrNull(Object object) {
String fieldName;
if (object != null) {
for (String s : getFieldNames(object.getClass())) {
fieldName = s;
Object value = invokeGetter(object, fieldName);
if (isNullOrEmpty(value)) {
return false;
}
}
return true;
} else {
return true;
}
}
public Map buildParametersAndAttributesMapFromRequest(HttpServletRequest request) {
Map requestMap = new HashMap();
requestMap.putAll(buildParametersMapFromRequest(request));
requestMap.putAll(buildAttributesMapFromRequest(request));
return requestMap;
}
public Map buildParametersMapFromRequest(HttpServletRequest request) {
return request.getParameterMap();
}
public Map buildAttributesMapFromRequest(HttpServletRequest request) {
String key;
Object value;
Map requestMap = new HashMap();
for (Enumeration attributeNames = request.getAttributeNames(); attributeNames.hasMoreElements(); ) {
key = (String) attributeNames.nextElement();
value = request.getAttribute(key);
requestMap.put(key, value);
}
return requestMap;
}
@SuppressWarnings({"unchecked"})
public Object changeAnnotationValue(Annotation annotation, String key, Object newValue) {
InvocationHandler handler = Proxy.getInvocationHandler(annotation);
Field f;
try {
f = handler.getClass().getDeclaredField("memberValues");
} catch (NoSuchFieldException | SecurityException e) {
throw new IllegalStateException(e);
}
f.setAccessible(true);
Map memberValues;
try {
memberValues = (Map) f.get(handler);
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalStateException(e);
}
Object oldValue = memberValues.get(key);
if (oldValue == null || oldValue.getClass() != newValue.getClass()) {
throw new IllegalArgumentException();
}
memberValues.put(key, newValue);
return oldValue;
}
public boolean checkWhetherOrNotSuperclassesExtendsCriteria(Class clazz, Class superClassCriteria) {
boolean result;
if (clazz != null && clazz != Object.class) {
String clazzName = clazz.getName();
result = clazzName.equals(superClassCriteria.getName());
if (!result) {
Class superClass = clazz.getSuperclass();
return checkWhetherOrNotSuperclassesExtendsCriteria(superClass, superClassCriteria);
}
return true;
}
return false;
}
public boolean checkWhetherOrNotSuperclassesImplementsCriteria(final Class clazz,
final Class interfaceCriteria) {
boolean result;
if (clazz != null && clazz != Object.class) {
Collection incomingInterfaces = Arrays.asList(clazz.getInterfaces());
if (incomingInterfaces.isEmpty()) {
Class superClass = clazz.getSuperclass();
return checkWhetherOrNotSuperclassesImplementsCriteria(superClass, interfaceCriteria);
}
result = IterableUtils.find(incomingInterfaces,
interface_ -> interface_.getName().equals(interfaceCriteria.getName())) != null;
if (!result) {
Class superClass = clazz.getSuperclass();
return checkWhetherOrNotSuperclassesImplementsCriteria(superClass, interfaceCriteria);
}
return true;
}
return false;
}
private boolean classNameEqualsToPredicate(Class clazz, String className) {
return StringUtils.isNotBlank(className) && clazz.getName().equals(className);
}
private void cleanEnumCache(Class enumClass)
throws NoSuchFieldException, IllegalAccessException {
blankField(enumClass, "enumConstantDirectory"); // Sun (Oracle?!?) JDK 1.5/6
blankField(enumClass, "enumConstants"); // IBM JDK
}
private void blankField(Class enumClass, String fieldName)
throws NoSuchFieldException, IllegalAccessException {
for (Field field : Class.class.getDeclaredFields()) {
if (field.getName().contains(fieldName)) {
AccessibleObject.setAccessible(new Field[]{field}, true);
setFailsafeFieldValue(field, enumClass, null);
break;
}
}
}
public Object createAndInitializeCollection(Class clazz, Object value) {
Class generics = extractGenerics(clazz);
return getObject(clazz, value, generics);
}
private Object getObject(Class clazz, Object value, Class generics) {
Object result;
if (Collection.class.isAssignableFrom(clazz)) {
result = ((ParameterizedType) clazz.getGenericSuperclass()).getActualTypeArguments()[0];
try {
((Collection) result).add(value);
} catch (Exception ignored) {
}
} else
result = getObject_(clazz, value, generics);
return result;
}
public Object createAndInitializeCollection(Class clazz, String methodName, Object value)
throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException {
Class generics = extractGenerics(clazz);
Object bean = generics.newInstance();
PropertyUtils.setProperty(bean, methodName, value);
return getObject(clazz, bean, generics);
}
public Collection createAndInitializeTypedCollection(Class typedClassForCollection)
throws IllegalAccessException, InstantiationException {
return createAndInitializeTypedCollection(typedClassForCollection, null);
}
public Collection createAndInitializeTypedCollection(Class clazz, String methodName, Object value)
throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException {
Collection result = new ArrayList<>();
Object bean = clazz.newInstance();
PropertyUtils.setProperty(bean, methodName, value);
result.add(bean);
return result;
}
public T createObject(Class type)
throws InvocationTargetException {
return createObject(type, true);
}
public T createObject(Class type, boolean privateConstructors)
throws InvocationTargetException {
// Use no-arg constructor.
Constructor constructor = null;
for (Constructor typeConstructor : type.getConstructors()) {
if (typeConstructor.getParameterTypes().length == 0) {
constructor = typeConstructor;
break;
}
}
if (constructor == null && privateConstructors) {
// Try a private constructor.
try {
constructor = type.getDeclaredConstructor();
constructor.setAccessible(true);
} catch (SecurityException | NoSuchMethodException ignored) {
}
}
// Otherwise try to use a common implementation.
if (constructor == null) {
try {
if (List.class.isAssignableFrom(type)) {
constructor = ArrayList.class.getConstructor();
} else if (Set.class.isAssignableFrom(type)) {
constructor = HashSet.class.getConstructor();
} else if (Map.class.isAssignableFrom(type)) {
constructor = LinkedHashMap.class.getConstructor();
}
} catch (Exception ex) {
throw new InvocationTargetException(ex, "Error getting constructor for class: " + type.getName());
}
}
if (constructor == null)
throw new InvocationTargetException(null,
"Unable to find a no-arg constructor for class: " + type.getName());
try {
return (T) constructor.newInstance();
} catch (Exception ex) {
throw new InvocationTargetException(ex, "Error constructing instance of class: " + type.getName());
}
}
/**
* Perform a deep initialization of the given object. That action includes initializing all its fields, according to the 'includeParent' indicator.
*
* @param object The object to initialize
* @param includeParent Indicates whether or not include the parent's fields
* @throws IllegalArgumentException If is not possible to initialize provided object.
* @throws IllegalAccessException If is not possible to initialize provided object.
* @deprecated Use com.araguacaima.commons.utils.ReflectionUtils#deepInitialization(java.lang.Class) instead
*/
@Deprecated()
public void deepInitialization(Object object, boolean includeParent)
throws IllegalArgumentException, IllegalAccessException {
deepInitialization(object, null, includeParent);
}
/**
* Perform a deep initialization of the given object including all its parent's fields.
*
* @param object The object to initialize
* @throws IllegalArgumentException If is not possible to initialize provided object.
* @throws IllegalAccessException If is not possible to initialize provided object.
* @deprecated Use com.araguacaima.commons.utils.ReflectionUtils#deepInitialization(java.lang.Class) instead
*/
@Deprecated()
public void deepInitialization(Object object)
throws IllegalArgumentException, IllegalAccessException {
deepInitialization(object, null, true);
}
/**
* Perform a deep initialization of the given object. That action includes initializing all its fields, according to the 'includeParent' indicator inside the provided set of 'packages'.
*
* @param object The object to initialize
* @param packages Set of packages to searching for.
* @throws IllegalArgumentException If is not possible to initialize provided object.
* @throws IllegalAccessException If is not possible to initialize provided object.
* @deprecated Use com.araguacaima.commons.utils.ReflectionUtils#deepInitialization(java.lang.Class) instead
*/
@Deprecated()
public void deepInitialization(Object object, Set packages)
throws IllegalArgumentException, IllegalAccessException {
deepInitialization(object, packages, true);
}
/**
* Perform a deep initialization of the given class according to the default random builder configuration.
*
* @param clazz The class to initialize
* @param This is the type parameter
* @return A new instance of the given class full initialized.
* @see io.github.benas.randombeans.EnhancedRandomBuilder
*/
public T deepInitialization(Class clazz) {
return deepInitialization(clazz, randomBuilder);
}
/**
* Perform a deep initialization of the given class according to the provided random builder configuration.
*
* @param clazz The class to initialize
* @param randomBuilder The random builder configuration.
* @param This is the type parameter
* @return A new instance of the given class full initialized.
* @see io.github.benas.randombeans.EnhancedRandomBuilder
*/
public T deepInitialization(Class clazz, EnhancedRandomBuilder randomBuilder) {
EnhancedRandom random = randomBuilder.build();
return random.nextObject(clazz);
}
/**
* Perform a deep initialization of the given object. That action includes initializing all its fields, according to the 'includeParent' indicator.
*
* @param object The object to initialize
* @param packages Set of packages to searching for.
* @param includeParent Indicates whether or not include the parent's fields.
* @throws IllegalArgumentException If is not possible to initialize provided object.
* @throws IllegalAccessException If is not possible to initialize provided object.
* @deprecated Use com.araguacaima.commons.utils.ReflectionUtils#deepInitialization(java.lang.Class) instead
*/
@Deprecated()
public void deepInitialization(Object object, Set packages, boolean includeParent)
throws IllegalArgumentException, IllegalAccessException {
Field[] fields;
if (includeParent) {
Collection fields_ = getAllFieldsIncludingParents(object);
fields = fields_.toArray(new Field[0]);
} else {
fields = object.getClass().getDeclaredFields();
}
for (Field field : fields) {
String fieldName = field.getName();
Class fieldClass = field.getType();
// skip primitives
if (fieldClass.isEnum() || fieldClass.isAssignableFrom(Enum.class) || fieldClass.isPrimitive() || (!isCollectionImplementation(fieldClass) && StringUtils.isNotBlank(getSimpleJavaTypeOrNull
(fieldClass.getSimpleName(),
false)))) {
continue;
}
// allow access to private fields
boolean isAccessible = field.isAccessible();
Object fieldValue;
Object value = null;
// skip if not in packages
boolean inPackage = packages == null || packages.size() == 0;
if (!inPackage) {
for (String pack : packages) {
if (fieldClass.getPackage().getName().startsWith(pack)) {
inPackage = true;
break;
}
}
if (!inPackage) {
continue;
}
}
field.setAccessible(true);
fieldValue = field.get(object);
if (fieldValue != null) {
try {
if (isCollectionImplementation(fieldClass)) {
deepInitialization(fieldValue, packages, false);
value = createAndInitializeTypedCollection(fieldClass, fieldValue);
} else if (isMapImplementation(fieldClass)) {
deepInitialization(fieldValue, packages, false);
value = new TreeMap();
((Map) value).putAll((Map) fieldValue);
} else {
value = fieldValue;
}
} catch (IllegalArgumentException | IllegalAccessException | InstantiationException e) {
log.error("Could not initialize " + fieldClass.getSimpleName() + ", Maybe it's an " +
"interface, abstract class, or it hasn't an empty Constructor");
continue;
}
field.set(object, value);
} else {
try {
value = fieldClass.newInstance();
field.set(object, value);
continue;
} catch (IllegalArgumentException | IllegalAccessException | InstantiationException e) {
log.error("Could not initialize " + fieldClass.getSimpleName() + ", Maybe it's an " +
"interface, abstract class, or it hasn't an empty Constructor");
continue;
}
}
// reset accessible
field.setAccessible(isAccessible);
// recursive call for sub-objects
deepInitialization(fieldValue, packages, false);
}
}
public void encloseStringValuesWithCDATA(Object object) {
if (object != null) {
Class clazz = object.getClass();
Collection declaredGetterMethods = getDeclaredGetterMethods(clazz);
Collection declaredSetterMethods = getDeclaredSetterMethods(clazz);
for (final Method getterMethod : declaredGetterMethods) {
Object[] argsGetter = {};
Object[] argsSetter = {String.class};
Object value;
Class returnedType = getterMethod.getReturnType();
final Predicate methodPredicate = method -> method.getName().equals(getterMethod.getName()
.replaceFirst(
"get",
"set"));
Method setterMethod = IterableUtils.find(declaredSetterMethods, methodPredicate);
if (setterMethod != null) {
if (returnedType.equals(String.class)) {
try {
value = getterMethod.invoke(object, argsGetter);
argsSetter[0] = stringUtils.enclose((String) value,
StringUtils.CDATA_START,
StringUtils.CDATA_END);
setterMethod.invoke(object, argsSetter);
} catch (IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
} else if (implementsClass(returnedType, Collection.class)) {
log.info("Is Collection");
} else if (isString(returnedType)) {
log.info("Is String");
} else if (isPrimitive(returnedType)) {
log.info("Is Primitive");
}
}
}
}
}
public Collection getDeclaredGetterMethods(Class clazz) {
return CollectionUtils.select(Arrays.asList(clazz.getDeclaredMethods()),
method -> method.getName().startsWith("get"));
}
public Collection getDeclaredSetterMethods(Class clazz) {
return CollectionUtils.select(Arrays.asList(clazz.getDeclaredMethods()),
method -> method.getName().startsWith("set"));
}
public boolean implementsClass(Class clazz, final Class implementedClass) {
return IterableUtils.find(Arrays.asList(clazz.getInterfaces()),
interface_ -> interface_.getName().equals(implementedClass.getName())) != null;
}
public boolean isString(Class clazz) {
return clazz.getName().equalsIgnoreCase("String") || clazz.getName().equalsIgnoreCase("java.lang.String");
}
public boolean isPrimitive(final Class clazz) {
return IterableUtils.find(PRIMITIVE_TYPES, o -> ((Class) o).getName().equals(clazz.getName())) != null;
}
public Class extractGenericsKeyValue(Field field, boolean extractKey) {
Class clazz = null;
if (Map.class.isAssignableFrom(field.getType())) {
try {
clazz = (Class) ((ParameterizedType) field.getGenericType()).getActualTypeArguments()[extractKey ? 0
: 1];
} catch (Throwable ignored) {
}
if (clazz == null) {
clazz = field.getType();
}
} else {
clazz = field.getType();
}
return extractGenerics(clazz);
}
public Class extractTypedGenericsParameter(Class clazz) {
if (clazz == null) {
return null;
}
if (!isCollectionImplementation(clazz)) {
return clazz;
}
Class generics;
if (Collection.class.isAssignableFrom(clazz)) {
TypeVariable[] typedGenerics = clazz.getTypeParameters();
if (typedGenerics == null) {
generics = Object.class;
} else {
try {
Object type = (typedGenerics[0]).getBounds()[0];
generics = (Class) type;
} catch (ClassCastException | IndexOutOfBoundsException ignored) {
try {
generics = (Class) clazz.getGenericInterfaces()[0];
} catch (Throwable t) {
generics = Object.class;
}
}
}
} else
generics = getClass(clazz);
return generics;
}
public void fillObjectWithMap(Object object, Map arg) {
String key;
String value;
for (Object o : arg.keySet()) {
key = (String) o;
value = (String) arg.get(key);
invokeSimpleSetter(object, key, value);
}
}
/**
* @param object The object for simple setter invokation
* @param fieldName The field on which the simple setter will be performed
* @param value The value to be assigned as parameter to the setter method
*/
public void invokeSimpleSetter(Object object, final String fieldName, final Object value) {
Method method = IterableUtils.find(getDeclaredSetterMethods(object.getClass()), innerMethod -> {
boolean result = false;
boolean setterFound = (innerMethod.getName().toUpperCase().equals(("set" + fieldName).toUpperCase()));
if (setterFound) {
result = innerMethod.getParameterTypes()[0].getName().equals(value.getClass().getName());
if (!result) {
Class clazz = getPrimitive(innerMethod.getParameterTypes()[0]);
if (clazz != null) {
String primitive = getClassFromPrimitive(clazz).getName();
if (StringUtils.isNotBlank(primitive)) {
result = (innerMethod.getName().toUpperCase().equals(("set" + fieldName).toUpperCase()))
&& (primitive.equals(
value.getClass().getName()));
}
}
}
}
return result;
});
Object[] args = {value};
try {
object = method.invoke(object, args);
} catch (IllegalAccessException e) {
log.error("Impossible to invoke method: " + fieldName + " because of an IllegalAccessException");
} catch (InvocationTargetException e) {
log.error("Impossible to invoke method: " + fieldName + " because of an InvocationTargetException");
} catch (NullPointerException e) {
log.error("Impossible to invoke method: " + fieldName + " because of an NullPointerException, " + "may "
+ "be" + " the incoming field:" + fieldName + " have not a setter");
}
}
public Class getPrimitive(final Class clazz) {
return (Class) IterableUtils.find(PRIMITIVE_TYPES, o -> ((Class) o).getName().equals(clazz.getName()));
}
public Class getClassFromPrimitive(Class clazz) {
Class newClazz = (Class) PRIMITIVE_AND_BASIC_TYPES.get(clazz);
if (newClazz != null) {
return newClazz;
} else {
return clazz;
}
}
public String formatObjectValues(Object object,
boolean includeHeader,
boolean newLine,
String indentation,
boolean considerHierarchy) {
try {
StringBuilder objectValuesFormatted = new StringBuilder();
try {
if (object != null) {
Class clazz = object.getClass();
Collection fieldNames = getFieldNames(clazz);
if (newLine) {
objectValuesFormatted.append(StringUtils.NEW_LINE);
}
if (isPrimitive(clazz) || isBasic(clazz)) {
if (newLine) {
objectValuesFormatted.append(getPrimitive(clazz)).append(StringUtils.BLANK_SPACE).append(
StringUtils.EQUAL_SYMBOL).append(StringUtils.BLANK_SPACE).append(object).append(
StringUtils.NEW_LINE);
} else {
objectValuesFormatted.append(object);
}
} else {
if (includeHeader) {
objectValuesFormatted.append(
"==============================================================").append
(StringUtils.NEW_LINE).append(
StringUtils.TAB).append("Values retrieved for incoming object ").append
(StringUtils.BLANK_SPACE).append(
"(that belongs to: ").append(getSimpleClassName(clazz)).append(")").append(
StringUtils.NEW_LINE).append(
"--------------------------------------------------------------").append
(StringUtils.NEW_LINE);
}
Collection getterMethods = considerHierarchy ? getGetterMethods(clazz) :
getDeclaredGetterMethods(
clazz);
for (final Method method : getterMethods) {
final String fieldName = (String) IterableUtils.find(fieldNames,
o -> ((String) o).equalsIgnoreCase(method.getName().replaceFirst("get",
StringUtils.EMPTY)));
Object value;
if (object instanceof Collection) {
if (!method.getName().equals("getClass")) {
objectValuesFormatted.append(formatObjectValues(((Collection) object).toArray(),
false,
false,
indentation,
false));
}
} else if (object instanceof Object[]) {
int collectionSize = ((Object[]) object).length;
for (int i = 0; i < collectionSize; i++) {
try {
value = ((Object[]) object)[i];
objectValuesFormatted.append(indentation).append("[").append(i).append("]")
.append(
StringUtils.BLANK_SPACE).append("(").append(getSimpleClassName(value
.getClass())).append(
")").append(StringUtils.BLANK_SPACE).append(StringUtils.EQUAL_SYMBOL)
.append(
StringUtils.BLANK_SPACE).append(StringUtils.isNotBlank(indentation)
&& !isBasic(
value.getClass()) ? String.valueOf(StringUtils
.NEW_LINE) : StringUtils.EMPTY).append(
formatObjectValues(value,
false,
false,
!isBasic(value.getClass()) ? indentation + StringUtils.TAB +
StringUtils.TAB : StringUtils.EMPTY,
false)).append(StringUtils.NEW_LINE);
} catch (Exception e) {
objectValuesFormatted.append("[").append(i).append("]").append(StringUtils
.BLANK_SPACE).append(
StringUtils.EQUAL_SYMBOL).append(StringUtils.BLANK_SPACE).append(
UNKNOWN_VALUE).append(StringUtils.NEW_LINE);
}
}
} else {
if (!method.getName().equals("getClass")) {
Object[] args = {};
try {
value = method.invoke(object, args);
objectValuesFormatted.append(fieldName).append(StringUtils.BLANK_SPACE).append(
"(").append(getSimpleClassName(value.getClass())).append(")").append(
StringUtils.BLANK_SPACE).append(StringUtils.EQUAL_SYMBOL).append(
StringUtils.BLANK_SPACE).append(!isBasic(value.getClass()) ? String.valueOf(StringUtils.NEW_LINE) : StringUtils.EMPTY).append(value
!= object ? formatObjectValues(
value,
false,
false,
!isBasic(value.getClass()) ? String.valueOf(StringUtils
.TAB) +
StringUtils.TAB : StringUtils.EMPTY,
false) : toString(object)).append(StringUtils.NEW_LINE);
} catch (IllegalAccessException | InvocationTargetException e) {
Object valueOfField = UNKNOWN_VALUE;
Field field;
try {
field = getFieldByFieldName(object, fieldName);
field.setAccessible(true);
valueOfField = field.get(object);
} catch (IllegalAccessException e1) {
log.error("Impossible to get the value of the field: " + fieldName + " "
+ "directly from the object: " + object + " because of an " +
"IllegalAccessException");
}
objectValuesFormatted.append(getSimpleClassName(valueOfField.getClass()))
.append(
")").append(StringUtils.BLANK_SPACE).append(StringUtils.EQUAL_SYMBOL)
.append(
StringUtils.BLANK_SPACE).append(valueOfField).append(StringUtils
.NEW_LINE);
} catch (NullPointerException e) {
Object valueOfField = UNKNOWN_VALUE;
Field field = getFieldByFieldName(object, fieldName);
objectValuesFormatted.append(field == null ? getSimpleClassName(method
.getReturnType()) : getSimpleClassName(
field.getType())).append(")").append(StringUtils.BLANK_SPACE).append(
StringUtils.EQUAL_SYMBOL).append(StringUtils.BLANK_SPACE).append
("null").append(
StringUtils.NEW_LINE);
} catch (Exception e) {
Object valueOfField = UNKNOWN_VALUE;
Field field;
try {
field = getFieldByFieldName(object, fieldName);
if (field != null) {
field.setAccessible(true);
valueOfField = field.get(object);
}
} catch (IllegalAccessException e1) {
log.error("Impossible to get the value of the field: " + fieldName + " "
+ "directly from the object: " + object + " because of an " +
"IllegalAccessException");
}
objectValuesFormatted.append(valueOfField == null ? getSimpleClassName(method
.getReturnType()) : getSimpleClassName(
valueOfField.getClass())).append(")").append(StringUtils.BLANK_SPACE)
.append(
StringUtils.EQUAL_SYMBOL).append(StringUtils.BLANK_SPACE).append(
valueOfField).append(StringUtils.NEW_LINE);
}
}
}
}
if (includeHeader) {
objectValuesFormatted.append(
"==============================================================");
}
}
} else {
return "null";
}
} catch (Exception e) {
log.error("ERROR: " + e.getMessage());
}
return objectValuesFormatted.toString();
} catch (Exception ignored) {
return object.toString();
}
}
public Collection getAllEmptyFieldNames(Object object) {
return getAllEmptyFieldNames(object, null);
}
public Collection getAllEmptyFieldNames(Object object, Collection excludeFields) {
String fieldName;
Collection collection = null;
if (excludeFields == null) {
excludeFields = new ArrayList();
}
if (object != null) {
final Collection fieldNames = getFieldNames(object.getClass());
collection = CollectionUtils.disjunction(fieldNames, excludeFields);
CollectionUtils.filter(collection, fieldName1 -> {
Object value = invokeGetter(object, fieldName1);
return isNullOrEmpty(value);
});
}
return collection;
}
public Collection getAllFieldsIncludingParents(Object object) {
return getAllFieldsIncludingParents(object.getClass());
}
public Collection getAllFieldsNamesOfType(Class clazz, final Class type) {
return getAllFieldsNamesOfType(clazz, null, type);
}
public Collection getAllFieldsOfType(Object object, final Class type) {
return getAllFieldsOfType(object.getClass(), null, type);
}
public Collection getAllFieldsOfType(Class clazz, final Class type) {
return getAllFieldsOfType(clazz, null, type);
}
public Collection getAllMethodNamesIncludingParents(Class clazz) {
return CollectionUtils.collect(getAllMethodsIncludingParents(clazz,
null,
Modifier.VOLATILE | Modifier.NATIVE | Modifier.TRANSIENT), METHOD_NAME_TRANSFORMER);
}
public Collection getAllMethodsIncludingParents(Class clazz,
final Integer modifiersInclusion,
final Integer modifiersExclusion) {
final Collection methods = new ArrayList<>();
MethodFilter fieldFilterModifierInclusion = method -> modifiersInclusion == null || (method.getModifiers() &
modifiersInclusion) != 0;
MethodFilter fieldFilterModifierExclusion = method -> modifiersExclusion == null || (method.getModifiers() &
modifiersExclusion) == 0;
doWithMethods(clazz,
methods::add,
modifiersInclusion == null ? modifiersExclusion == null ? null : fieldFilterModifierExclusion :
fieldFilterModifierInclusion);
return methods;
}
public Collection getAllMethodsIncludingParentsNames(Class clazz) {
return getAllMethodsIncludingParentsNames(clazz, null);
}
public Collection getAllMethodsIncludingParentsNames(Class clazz, Collection excludeMethods) {
Collection allMethods = getAllMethodsIncludingParents(clazz);
Collection result = CollectionUtils.collect(allMethods, METHOD_NAME_TRANSFORMER);
Collections.sort((List) result);
if (CollectionUtils.isEmpty(excludeMethods)) {
return result;
}
CollectionUtils.filterInverse(result, methodName -> methodNameIsContainedIn(methodName, excludeMethods));
return result;
}
public Collection getAllMethodsIncludingParents(Class clazz) {
return getAllMethodsIncludingParents(clazz, null, Modifier.VOLATILE | Modifier.NATIVE | Modifier.TRANSIENT);
}
private boolean methodNameIsContainedIn(String methodName, Collection excludeMethods) {
return excludeMethods.contains(methodName);
}
public Collection getAllMethodsNamesOfType(Class clazz, final Class type) {
return getAllMethodsNamesOfType(clazz, null, type);
}
public Collection getAllMethodsNamesOfType(Class clazz,
Collection excludeMethods,
final Class type) {
final Collection result = getAllMethodsOfType(clazz, excludeMethods, type);
CollectionUtils.transform(result, o -> ((Method) o).getName());
return result;
}
public Collection getAllMethodsOfType(Class clazz, Collection excludeMethods,
final Class type) {
final Collection result = new ArrayList();
if (clazz != null) {
IterableUtils.forEach(getAllMethodsIncludingParents(clazz, excludeMethods), method -> {
if (method.getReturnType().equals(type)) {
result.add(method);
}
});
}
return result;
}
public Collection getAllMethodsIncludingParents(Class clazz, Collection excludeMethods) {
Collection result = getAllMethodsIncludingParents(clazz);
if (CollectionUtils.isEmpty(excludeMethods)) {
return result;
}
return CollectionUtils.select(result, method -> {
String methodName = method.getName();
return !excludeMethods.contains(methodName);
});
}
public Collection getAllMethodsNamesOfType(Object object, final Class type) {
return getAllMethodsNamesOfType(object, null, type);
}
public Collection getAllMethodsNamesOfType(Object object,
Collection excludeMethods,
final Class type) {
return CollectionUtils.collect(getAllMethodsOfType(object, excludeMethods, type), METHOD_NAME_TRANSFORMER);
}
public Collection getAllMethodsOfType(Object object, Collection excludeFields,
final Class type) {
Collection result = new ArrayList();
if (object != null) {
result = getAllMethodsOfType(object.getClass(), excludeFields, type);
}
return result;
}
public Collection getDeclaredMethodsNames(Class clazz) {
return getDeclaredMethodsNames(clazz, null);
}
public Collection getDeclaredMethodsNames(Class clazz, Collection excludeMethods) {
Collection declaredMethods = new ArrayList(Arrays.asList(clazz.getDeclaredMethods()));
Collection result = CollectionUtils.collect(declaredMethods, METHOD_NAME_TRANSFORMER);
if (CollectionUtils.isEmpty(excludeMethods)) {
return result;
}
CollectionUtils.filterInverse(result, excludeMethods::contains);
Collections.sort((List) result);
return result;
}
public Field getField(Class clazz, String fieldName) {
return IterableUtils.find(getAllFieldsIncludingParents(clazz),
field -> fieldNameEqualsToPredicate(field, fieldName));
}
public FieldCompare getFieldCompare() {
return FIELD_COMPARE;
}
public Field getFieldInclusiveOnParents(Class clazz, String field) {
return findField(clazz, field);
}
public Collection getFieldNames(Class clazz) {
return getFieldNames(clazz, null);
}
public Collection getFieldNames(Class clazz, Collection excludeFields) {
Collection fields = getAllFieldsIncludingParents(clazz);
Collection result = CollectionUtils.collect(fields, FIELD_NAME_TRANSFORMER);
if (CollectionUtils.isEmpty(excludeFields)) {
return result;
}
CollectionUtils.filterInverse(result, field -> field.startsWith("class$") || excludeFields.contains(field));
Collections.sort((List) result);
return result;
}
public Object getFieldType(Object object, final String fieldName) {
Object value = null;
if (isBasic(object.getClass()) || StringUtils.isBlank(fieldName)) {
return object.getClass().getName();
}
Field field = IterableUtils.find(getDeclaredFields(object),
innerField -> innerField.getName().toUpperCase().equals((fieldName).toUpperCase()));
return field.getType().getName();
}
public boolean isBasic(final Class clazz) {
return IterableUtils.find(BASIC_CLASSES, o -> ((Class) o).getName().equals(clazz.getName())) != null;
}
public Collection getDeclaredFields(Object object) {
Field[] declaredFields = getDeclaredFields(object.getClass());
return Arrays.asList(declaredFields);
}
public Map getFieldValueMap(Object object) {
Map objectFieldValueMap = new HashMap();
try {
if (object != null) {
Class clazz = object.getClass();
if (!isPrimitive(clazz) && !isBasic(clazz)) {
Collection fields = getAllFieldsIncludingParents(clazz);
String fieldName;
Object[] args = new Object[0];
for (Field field : fields) {
fieldName = field.getName();
objectFieldValueMap.put(fieldName, invokeGetter(object, fieldName));
}
} else {
objectFieldValueMap.put("[".concat(getSimpleClassName(clazz)).concat("]"), object);
}
}
} catch (Exception e) {
log.error("ERROR: " + e.getMessage());
}
return objectFieldValueMap;
}
public Object invokeGetter(Object object, final String fieldName) {
Object value = null;
Method method = IterableUtils.find(getGetterMethods(object.getClass()),
innerMethod -> innerMethod.getName().toUpperCase().equals(("get" + fieldName).toUpperCase()));
Object[] args = {};
try {
value = method.invoke(object, args);
} catch (IllegalAccessException | InvocationTargetException e) {
log.error("Impossible to invoke method: " + "get" + fieldName + " because of an " + e.getClass().getName());
try {
Field field = getFieldByFieldName(object, fieldName);
field.setAccessible(true);
value = field.get(object);
} catch (IllegalAccessException e1) {
log.error("Impossible to get the value of the field: " + fieldName + " directly from the object: " +
object + " because of an " + e1.getClass().getName());
}
} catch (NullPointerException e) {
log.error("Impossible to invoke method: " + "get" + fieldName + " because of an NullPointerException, " +
"may be the incoming field :" + fieldName + " have not a getter");
try {
Field field = getFieldByFieldName(object, fieldName);
if (field != null) {
field.setAccessible(true);
value = field.get(object);
}
} catch (IllegalAccessException e1) {
log.error("Impossible to get the value of the field: " + fieldName + " directly from the object: " +
object + " because of an IllegalAccessException");
}
}
return value;
}
public Collection getGetterMethods(Class clazz) {
return CollectionUtils.select(getAllMethodsIncludingParents(clazz), METHOD_IS_GETTER_PREDICATE);
}
public Field getFieldByFieldName(Object object, final String fieldName) {
return getFieldByFieldName(object.getClass(), fieldName);
}
public Field getFieldByFieldName(Class clazz, final String fieldName) {
return IterableUtils.find(getAllFieldsIncludingParents(clazz),
field -> fieldNameEqualsToPredicate(field, fieldName));
}
public String getFullyQualifiedJavaTypeOrNull(Object object) {
return getFullyQualifiedJavaTypeOrNull(object.getClass());
}
public String getFullyQualifiedJavaTypeOrNull(Class clazz) {
return getFullyQualifiedJavaTypeOrNull(clazz.getName(), true);
}
public Collection getGetterMethodsForField(Class clazz, final String fieldName) {
return CollectionUtils.select(getGetterMethods(clazz),
method -> methodNameEqualsToPredicate(method, "get".concat(StringUtils.capitalize(fieldName))));
}
private boolean methodNameEqualsToPredicate(Method method, String methodName) {
return !StringUtils.isBlank(methodName) && method.getName().equals(methodName);
}
public Method getMethod(Class clazz, String methodName) {
return IterableUtils.find(getAllMethodsIncludingParents(clazz),
method -> methodNameEqualsToPredicate(method, methodName));
}
public Collection getSetterMethodsForField(Class clazz, final String fieldName) {
return CollectionUtils.select(getSetterMethods(clazz),
method -> methodNameEqualsToPredicate(method, "set".concat(StringUtils.capitalize(fieldName))));
}
public Collection getSetterMethods(Class clazz) {
return CollectionUtils.select(getAllMethodsIncludingParents(clazz), METHOD_IS_SETTER_PREDICATE);
}
public Object getValueFromCollectionImplementation(Object value) {
if (value == null) {
return null;
}
Class clazz = value.getClass();
if (Collection.class.isAssignableFrom(clazz)) {
return new ArrayList<>((Collection) value).get(0);
} else if (Object[].class.isAssignableFrom(clazz) || clazz.isArray()) {
return ((Object[]) value)[0];
} else {
throw new IllegalArgumentException("Invalid Type. Incoming type must be a collection implementation");
}
}
public boolean implementsClass(Class clazz, final String implementedClass) {
return IterableUtils.find(recursivelyGetAllInterfaces(clazz),
interface_ -> classNameEqualsToPredicate(interface_, implementedClass)) != null;
}
public Object invokeMethod(Object object, final String methodName, final Object[] args) {
Object result = new Object();
try {
return invokeMethodThrowException(object, methodName, args);
} catch (Throwable e) {
log.error("Impossible to invoke method: " + methodName + " because of an Exception of type: " + e
.getClass() + ". The exception message is: " + e.getMessage());
}
return result;
}
public Object invokeMethodThrowException(Object object, final String methodName, final Object[] args)
throws Exception {
Object result;
final List objectClasses = new ArrayList(Arrays.asList(args));
CollectionUtils.transform(objectClasses, CLASS_FROM_OBJECT_TRANSFORMER);
Collection methods = CollectionUtils.select(getAllMethodsIncludingParents(object.getClass()),
method -> methodNameEqualsToPredicate(method, methodName));
Method method = IterableUtils.find(methods, (Predicate) o -> {
Method innerMethod = (Method) o;
final List parameterClasses = Arrays.asList(innerMethod.getParameterTypes());
int size = objectClasses.size();
if (size == parameterClasses.size()) {
CollectionUtils.transform(parameterClasses, (Transformer) o1 -> getClassFromPrimitive((Class) o1));
boolean isAssignableFrom = true;
for (int i = 0; i < size; i++) {
Object objectClass = objectClasses.get(i);
Class aClass = parameterClasses.get(i);
try {
Class cls = objectClass.getClass();
if (Class.class.equals(cls)) {
isAssignableFrom = isAssignableFrom && aClass.isAssignableFrom((Class) objectClass);
} else {
isAssignableFrom = isAssignableFrom && aClass.isAssignableFrom(cls);
}
} catch (Throwable ignored) {
isAssignableFrom = false;
}
}
String s = innerMethod.getName().toUpperCase();
String s1 = (methodName).toUpperCase();
return (s.equals(s1)) && isAssignableFrom;
} else {
return false;
}
});
try {
result = method.invoke(object, args);
} catch (IllegalAccessException e) {
log.error("Impossible to invoke method: " + methodName + " because of an IllegalAccessException. " + e
.getMessage());
throw e;
} catch (InvocationTargetException e) {
log.error("Impossible to invoke method: " + methodName + " because of an InvocationTargetException. " + e
.getMessage());
throw e;
} catch (NullPointerException e) {
log.error("Impossible to invoke method: " + methodName + " because of an NullPointerException, " +
"maybe" + " the incoming method name: '" + methodName + "' does not exists");
throw e;
}
return result;
}
public void invokeVoid(Object object, final String voidName, final Object[] args) {
final Collection objectClasses = new ArrayList(Arrays.asList(args));
CollectionUtils.transform(objectClasses, CLASS_FROM_OBJECT_TRANSFORMER);
Collection methods = CollectionUtils.select(getAllMethodsIncludingParents(object.getClass()),
method -> methodNameEqualsToPredicate(method, voidName));
Method method = IterableUtils.find(methods, (Predicate) o -> {
Method innerMethod = (Method) o;
final Collection parameterClasses = Arrays.asList(innerMethod.getParameterTypes());
CollectionUtils.transform(parameterClasses, (Transformer) o1 -> getClassFromPrimitive((Class) o1));
boolean result = innerMethod.getName().toUpperCase().equals((voidName).toUpperCase());
if (parameterClasses.size() == objectClasses.size()) {
Class[] parameterClassesArray = (Class[]) parameterClasses.toArray();
Object[] objectClassesArray = objectClasses.toArray();
for (int i = 0; i < parameterClassesArray.length; i++) {
Class parameterClass = parameterClassesArray[i];
Class objectClass = (Class) objectClassesArray[i];
result = result && (checkWhetherOrNotSuperclassesExtendsCriteria(objectClass,
parameterClass) || checkWhetherOrNotSuperclassesImplementsCriteria(objectClass,
parameterClass));
}
} else {
result = false;
}
return result;
});
try {
method.invoke(object, args);
} catch (IllegalArgumentException e) {
log.error("Impossible to invoke void method: " + voidName + " because of an IllegalArgumentException");
} catch (IllegalAccessException e) {
log.error("Impossible to invoke void method: " + voidName + " because of an IllegalAccessException");
} catch (InvocationTargetException e) {
log.error("Impossible to invoke void method: " + voidName + " because of an InvocationTargetException");
Throwable exception = e.getTargetException();
exception.printStackTrace();
} catch (NullPointerException e) {
log.error("Impossible to invoke void method: " + voidName + " because of an NullPointerException, " +
"may be the incoming void name:" + voidName + " does not exists");
}
}
public boolean isBoolean(Class clazz) {
return clazz.getName().equalsIgnoreCase("Boolean") || clazz.getName().equalsIgnoreCase("java.lang.Boolean");
}
public boolean isDouble(Class clazz) {
return clazz.getName().equalsIgnoreCase("Double") || clazz.getName().equalsIgnoreCase("java.lang.Double");
}
public boolean isFloat(Class clazz) {
return clazz.getName().equalsIgnoreCase("Float") || clazz.getName().equalsIgnoreCase("java.lang.Float");
}
public boolean isInteger(Class clazz) {
return clazz.getName().equalsIgnoreCase("Integer") || clazz.getName().equalsIgnoreCase("java.lang.Integer");
}
public boolean isNullOrEmpty(Object object) {
//TODO AMM 30072010: Este metodo explota para todos los tipos Map o Collection. Quizas sea bueno preguntar si
// el la clase al que pertenece el objeto es una instancia de Collection o Map e invocar el método "isEmpty"
boolean result = false;
if (object != null) {
Class clazz = object.getClass();
if (isPrimitive(clazz)) {
} else if (isString(clazz)) {
result = StringUtils.isNotBlank((String) object);
} else if (object instanceof Collection || object instanceof Map) {
try {
Method method = clazz.getMethod("isEmpty");
Object value = method.invoke(object);
result = (Boolean) value;
} catch (NoSuchMethodException e) {
log.error("Impossible to obtain the isEmpty method from object: " + object + ".");
} catch (InvocationTargetException | IllegalAccessException e) {
log.error("Impossible to invoke the isEmpty method to object: " + object + ".");
}
}
} else {
return true;
}
return result;
}
public T mergeObjects(T origin, T target)
throws IllegalAccessException, InstantiationException {
return mergeObjects(origin, target, false, false);
}
@SuppressWarnings("unchecked")
public T mergeObjects(T origin, T target, boolean override, boolean nullify)
throws IllegalAccessException, InstantiationException {
Class targetClazz = target.getClass();
Collection targetFields = getAllFieldsIncludingParents(targetClazz);
Object returnValue = targetClazz.newInstance();
for (Field field : targetFields) {
try {
field.setAccessible(true);
Object value = field.get(origin);
if (nullify || (value != null)) {
if (override) {
field.set(returnValue, value);
} else {
if (isMapImplementation(value.getClass())) {
if (((Map) value).size() == 0) {
field.set(returnValue, value);
continue;
}
}
if (isCollectionImplementation(value.getClass())) {
if (((Collection) value).size() == 0) {
field.set(returnValue, value);
continue;
}
}
final java.io.Serializable defaultValue = PrimitiveDefaults.getDefaultValue(value.getClass());
if (defaultValue != null && !defaultValue.equals(value)) {
field.set(returnValue, value);
}
}
}
} catch (Throwable ignored) {
}
}
return (T) returnValue;
}
private boolean methodIsNotContainedIn(Method method, Collection excludeMethods) {
return !methodIsContainedIn(method, excludeMethods);
}
private boolean methodIsContainedIn(Method method, Collection excludeMethods) {
return IterableUtils.find(excludeMethods,
methodName -> methodNameEqualsToPredicate(method, methodName)) != null;
}
/* public String toString(Object object) {
return formatObjectValues(object, true, true, StringUtils.EMPTY, false);
}*/
private boolean methodNameIsNotContainedIn(String methodName, Collection excludeMethods) {
return !methodNameIsContainedIn(methodName, excludeMethods);
}
public LinkedList recursivelyGetAllInterfaces(Class clazz) {
if (clazz == null || Object.class.getName().equals(clazz.getName()) || isCollectionImplementation(
clazz) || isMapImplementation(clazz) || getFullyQualifiedJavaTypeOrNull(clazz.getName(),
true) != null) {
return new LinkedList<>();
} else {
LinkedList result = new LinkedList<>();
Class superclass = clazz.getSuperclass();
if (superclass != null && !Object.class.getName().equals(superclass.getName()) && clazz.isAssignableFrom(
superclass) && superclass.isInterface()) {
result.add(superclass);
result.addAll(recursivelyGetAllInterfaces(superclass));
}
return result;
}
}
public LinkedList recursivelyGetAllSuperClasses(Class clazz) {
if (clazz == null || Object.class.getName().equals(clazz.getName()) || isCollectionImplementation(
clazz) || getFullyQualifiedJavaTypeOrNull(clazz.getName(), true) != null) {
return new LinkedList<>();
} else {
LinkedList result = new LinkedList<>();
Class superclass = clazz.getSuperclass();
if (superclass != null && !Object.class.getName().equals(superclass.getName())) {
result.add(superclass);
result.addAll(recursivelyGetAllSuperClasses(superclass));
}
return result;
}
}
public String toString(Object object) {
try {
return "\n".concat(ToStringBuilder.reflectionToString(object));
} catch (Exception ignored) {
return toString(object, false);
}
}
public String toString(Object object, boolean includeHeader) {
try {
return formatObjectValues(object, includeHeader, true, StringUtils.EMPTY, false);
} catch (Exception ignored) {
return object.toString();
}
}
public String toString(Object object, boolean includeHeader, boolean considerHierarchy) {
try {
return formatObjectValues(object, includeHeader, true, StringUtils.EMPTY, considerHierarchy);
} catch (Exception ignored) {
return object.toString();
}
}
private void traverseForExtraction(Object entity, Class
incomingClass, Class outcomingClass, Set result) {
ReflectionUtils.doWithFields(incomingClass, field -> {
field.setAccessible(true);
Object object_ = field.get(entity);
if (object_ != null) {
if (isCollectionImplementation(object_.getClass())) {
((Collection) object_).forEach(iter -> {
traverseForExtraction(iter, iter.getClass(), outcomingClass, result);
T iter1 = (T) iter;
if (outcomingClass.isAssignableFrom(iter1.getClass())) {
result.add(iter1);
}
});
} else {
if (!result.contains(object_)) {
Class generic = extractGenerics(field);
if (outcomingClass.isAssignableFrom(generic)) {
Class fieldType = field.getType();
if (isCollectionImplementation(fieldType)) {
((Collection) object_).forEach(iter -> {
traverseForExtraction(iter, generic, outcomingClass, result);
T iter1 = (T) iter;
if (outcomingClass.isAssignableFrom(iter1.getClass())) {
result.add(iter1);
}
});
} else {
T object = (T) field.get(entity);
if (outcomingClass.isAssignableFrom(object.getClass())) {
result.add(object);
}
}
} else {
String genericType = getFullyQualifiedJavaTypeOrNull(generic);
if (genericType == null) {
traverseForExtraction(object_, generic, outcomingClass, result);
}
}
}
}
}
}, this::isComplex);
}
private boolean isComplex(Field field) {
int modifiers = field.getModifiers();
if (Modifier.isStatic(modifiers)
|| Modifier.isFinal(modifiers)
|| Modifier.isNative(modifiers)
|| Modifier.isAbstract(modifiers)
|| Modifier.isTransient(modifiers)) {
return false;
}
Class aClass = null;
try {
aClass = extractGenerics(field);
} catch (Throwable t) {
t.printStackTrace();
}
return aClass != null && (getFullyQualifiedJavaTypeOrNull(aClass) == null && !aClass.isEnum() && !Enum.class.isAssignableFrom(aClass));
}
public Set extractByType(Object object, Class outcomingClass) {
Set result = new HashSet<>();
traverseForExtraction(object, object.getClass(), outcomingClass, result);
return result;
}
private static class FieldCompare implements Comparator {
public int compare(Object o1, Object o2) {
String path1 = ((Field) o1).getName();
String path2 = ((Field) o2).getName();
return path1.compareTo(path2);
}
}
public static class PrimitiveDefaults {
// These gets initialized to their default values
private static final boolean DEFAULT_BOOLEAN = Boolean.FALSE;
private static final Boolean DEFAULT_BOOLEAN_ = Boolean.FALSE;
private static final byte DEFAULT_BYTE = (byte) 0;
private static final Byte DEFAULT_BYTE_ = (byte) 0;
private static final char DEFAULT_CHAR = '\0';
private static final double DEFAULT_DOUBLE = 0d;
private static final Double DEFAULT_DOUBLE_ = 0d;
private static final float DEFAULT_FLOAT = 0f;
private static final Float DEFAULT_FLOAT_ = 0f;
private static final int DEFAULT_INT = 0;
private static final Integer DEFAULT_INT_ = 0;
private static final long DEFAULT_LONG = 0L;
private static final Long DEFAULT_LONG_ = 0L;
private static final short DEFAULT_SHORT = (short) 0;
private static final Short DEFAULT_SHORT_ = (short) 0;
private static final String DEFAULT_STRING_ = StringUtils.EMPTY;
public static java.io.Serializable getDefaultValue(Class clazz) {
if (clazz.equals(boolean.class)) {
return DEFAULT_BOOLEAN;
} else if (clazz.equals(Boolean.class)) {
return DEFAULT_BOOLEAN_;
} else if (clazz.equals(byte.class)) {
return DEFAULT_BYTE;
} else if (clazz.equals(Byte.class)) {
return DEFAULT_BYTE_;
} else if (clazz.equals(short.class)) {
return DEFAULT_SHORT;
} else if (clazz.equals(Short.class)) {
return DEFAULT_SHORT_;
} else if (clazz.equals(char.class)) {
return DEFAULT_CHAR;
} else if (clazz.equals(int.class)) {
return DEFAULT_INT;
} else if (clazz.equals(Integer.class)) {
return DEFAULT_INT_;
} else if (clazz.equals(long.class)) {
return DEFAULT_LONG;
} else if (clazz.equals(Long.class)) {
return DEFAULT_LONG_;
} else if (clazz.equals(float.class)) {
return DEFAULT_FLOAT;
} else if (clazz.equals(Float.class)) {
return DEFAULT_FLOAT_;
} else if (clazz.equals(double.class)) {
return DEFAULT_DOUBLE;
} else if (clazz.equals(Double.class)) {
return DEFAULT_DOUBLE_;
} else if (clazz.equals(String.class)) {
return DEFAULT_STRING_;
} else if (clazz.equals(Object.class)) {
return null;
} else {
throw new IllegalArgumentException("Class type " + clazz + " not supported");
}
}
}
/**
* Pre-built MethodFilter that matches all non-bridge non-synthetic methods
* which are not declared on {@code java.lang.Object}.
*
* @since 3.0.5
*/
public static final MethodFilter USER_DECLARED_METHODS =
(method -> !method.isBridge() && !method.isSynthetic());
/**
* Pre-built FieldFilter that matches all non-static, non-final fields.
*/
public static final FieldFilter COPYABLE_FIELDS =
(field -> !(Modifier.isStatic(field.getModifiers()) || Modifier.isFinal(field.getModifiers())));
/**
* Naming prefix for CGLIB-renamed methods.
*
* @see #isCglibRenamedMethod
*/
private static final String CGLIB_RENAMED_METHOD_PREFIX = "CGLIB$";
private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
private static final Method[] EMPTY_METHOD_ARRAY = new Method[0];
private static final Field[] EMPTY_FIELD_ARRAY = new Field[0];
private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
/**
* Cache for {@link Class#getDeclaredMethods()} plus equivalent default methods
* from Java 8 based interfaces, allowing for fast iteration.
*/
private static final Map, Method[]> declaredMethodsCache = new ConcurrentReferenceHashMap<>(256);
/**
* Cache for {@link Class#getDeclaredFields()}, allowing for fast iteration.
*/
private static final Map, Field[]> declaredFieldsCache = new ConcurrentReferenceHashMap<>(256);
// Exception handling
/**
* Handle the given reflection exception.
* Should only be called if no checked exception is expected to be thrown
* by a target method, or if an error occurs while accessing a method or field.
*
Throws the underlying RuntimeException or Error in case of an
* InvocationTargetException with such a root cause. Throws an
* IllegalStateException with an appropriate message or
* UndeclaredThrowableException otherwise.
*
* @param ex the reflection exception to handle
*/
public static void handleReflectionException(Exception ex) {
if (ex instanceof NoSuchMethodException) {
throw new IllegalStateException("Method not found: " + ex.getMessage());
}
if (ex instanceof IllegalAccessException) {
throw new IllegalStateException("Could not access method or field: " + ex.getMessage());
}
if (ex instanceof InvocationTargetException) {
handleInvocationTargetException((InvocationTargetException) ex);
}
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
throw new UndeclaredThrowableException(ex);
}
/**
* Handle the given invocation target exception. Should only be called if no
* checked exception is expected to be thrown by the target method.
*
Throws the underlying RuntimeException or Error in case of such a root
* cause. Throws an UndeclaredThrowableException otherwise.
*
* @param ex the invocation target exception to handle
*/
public static void handleInvocationTargetException(InvocationTargetException ex) {
rethrowRuntimeException(ex.getTargetException());
}
/**
* Rethrow the given {@link Throwable exception}, which is presumably the
* target exception of an {@link InvocationTargetException}.
* Should only be called if no checked exception is expected to be thrown
* by the target method.
*
Rethrows the underlying exception cast to a {@link RuntimeException} or
* {@link Error} if appropriate; otherwise, throws an
* {@link UndeclaredThrowableException}.
*
* @param ex the exception to rethrow
* @throws RuntimeException the rethrown exception
*/
public static void rethrowRuntimeException(Throwable ex) {
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
if (ex instanceof Error) {
throw (Error) ex;
}
throw new UndeclaredThrowableException(ex);
}
/**
* Rethrow the given {@link Throwable exception}, which is presumably the
* target exception of an {@link InvocationTargetException}.
* Should only be called if no checked exception is expected to be thrown
* by the target method.
*
Rethrows the underlying exception cast to an {@link Exception} or
* {@link Error} if appropriate; otherwise, throws an
* {@link UndeclaredThrowableException}.
*
* @param ex the exception to rethrow
* @throws Exception the rethrown exception (in case of a checked exception)
*/
public static void rethrowException(Throwable ex) throws Exception {
if (ex instanceof Exception) {
throw (Exception) ex;
}
if (ex instanceof Error) {
throw (Error) ex;
}
throw new UndeclaredThrowableException(ex);
}
// Constructor handling
/**
* Obtain an accessible constructor for the given class and parameters.
*
* @param clazz the clazz to check
* @param parameterTypes the parameter types of the desired constructor
* @return the constructor reference
* @throws NoSuchMethodException if no such constructor exists
* @since 5.0
*/
public static Constructor accessibleConstructor(Class clazz, Class... parameterTypes)
throws NoSuchMethodException {
Constructor ctor = clazz.getDeclaredConstructor(parameterTypes);
makeAccessible(ctor);
return ctor;
}
/**
* Make the given constructor accessible, explicitly setting it accessible
* if necessary. The {@code setAccessible(true)} method is only called
* when actually necessary, to avoid unnecessary conflicts with a JVM
* SecurityManager (if active).
*
* @param ctor the constructor to make accessible
* @see java.lang.reflect.Constructor#setAccessible
*/
@SuppressWarnings("deprecation") // on JDK 9
public static void makeAccessible(Constructor ctor) {
if ((!Modifier.isPublic(ctor.getModifiers()) ||
!Modifier.isPublic(ctor.getDeclaringClass().getModifiers())) && !ctor.isAccessible()) {
ctor.setAccessible(true);
}
}
// Method handling
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and no parameters. Searches all superclasses up to {@code Object}.
* Returns {@code null} if no {@link Method} can be found.
*
* @param clazz the class to introspect
* @param name the name of the method
* @return the Method object, or {@code null} if none found
*/
public static Method findMethod(Class clazz, String name) {
return findMethod(clazz, name, EMPTY_CLASS_ARRAY);
}
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and parameter types. Searches all superclasses up to {@code Object}.
*
Returns {@code null} if no {@link Method} can be found.
*
* @param clazz the class to introspect
* @param name the name of the method
* @param paramTypes the parameter types of the method
* (may be {@code null} to indicate any signature)
* @return the Method object, or {@code null} if none found
*/
public static Method findMethod(Class clazz, String name, Class... paramTypes) {
Class searchType = clazz;
while (searchType != null) {
Method[] methods = searchType.isInterface() ?
searchType.getMethods() :
getDeclaredMethods(searchType, false);
for (Method method : methods) {
if (name.equals(method.getName()) &&
(paramTypes == null || Arrays.equals(paramTypes, method.getParameterTypes()))) {
return method;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
/**
* Invoke the specified {@link Method} against the supplied target object with no arguments.
* The target object can be {@code null} when invoking a static {@link Method}.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException}.
*
* @param method the method to invoke
* @param target the target object to invoke the method on
* @return the invocation result, if any
* @see #invokeMethod(java.lang.reflect.Method, Object, Object[])
*/
public static Object invokeMethod(Method method, Object target) {
return invokeMethod(method, target, EMPTY_OBJECT_ARRAY);
}
/**
* Invoke the specified {@link Method} against the supplied target object with the
* supplied arguments. The target object can be {@code null} when invoking a
* static {@link Method}.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException}.
*
* @param method the method to invoke
* @param target the target object to invoke the method on
* @param args the invocation arguments (may be {@code null})
* @return the invocation result, if any
*/
public static Object invokeMethod(Method method, Object target, Object... args) {
try {
return method.invoke(target, args);
} catch (Exception ex) {
handleReflectionException(ex);
}
throw new IllegalStateException("Should never get here");
}
/**
* Determine whether the given method explicitly declares the given
* exception or one of its superclasses, which means that an exception
* of that type can be propagated as-is within a reflective invocation.
*
* @param method the declaring method
* @param exceptionType the exception to throw
* @return {@code true} if the exception can be thrown as-is;
* {@code false} if it needs to be wrapped
*/
public static boolean declaresException(Method method, Class exceptionType) {
Class[] declaredExceptions = method.getExceptionTypes();
for (Class declaredException : declaredExceptions) {
if (declaredException.isAssignableFrom(exceptionType)) {
return true;
}
}
return false;
}
/**
* Perform the given callback operation on all matching methods of the given
* class, as locally declared or equivalent thereof (such as default methods
* on Java 8 based interfaces that the given class implements).
*
* @param clazz the class to introspect
* @param mc the callback to invoke for each method
* @throws IllegalStateException if introspection fails
* @see #doWithMethods
* @since 4.2
*/
public static void doWithLocalMethods(Class clazz, MethodCallback mc) {
Method[] methods = getDeclaredMethods(clazz, false);
for (Method method : methods) {
try {
mc.doWith(method);
} catch (IllegalAccessException ex) {
throw new IllegalStateException("Not allowed to access method '" + method.getName() + "': " + ex);
}
}
}
/**
* Perform the given callback operation on all matching methods of the given
* class and superclasses.
*
The same named method occurring on subclass and superclass will appear
* twice, unless excluded by a {@link MethodFilter}.
*
* @param clazz the class to introspect
* @param mc the callback to invoke for each method
* @throws IllegalStateException if introspection fails
* @see #doWithMethods(Class, MethodCallback, MethodFilter)
*/
public static void doWithMethods(Class clazz, MethodCallback mc) {
doWithMethods(clazz, mc, null);
}
/**
* Perform the given callback operation on all matching methods of the given
* class and superclasses (or given interface and super-interfaces).
*
The same named method occurring on subclass and superclass will appear
* twice, unless excluded by the specified {@link MethodFilter}.
*
* @param clazz the class to introspect
* @param mc the callback to invoke for each method
* @param mf the filter that determines the methods to apply the callback to
* @throws IllegalStateException if introspection fails
*/
public static void doWithMethods(Class clazz, MethodCallback mc, MethodFilter mf) {
// Keep backing up the inheritance hierarchy.
Method[] methods = getDeclaredMethods(clazz, false);
for (Method method : methods) {
if (mf != null && !mf.matches(method)) {
continue;
}
try {
mc.doWith(method);
} catch (IllegalAccessException ex) {
throw new IllegalStateException("Not allowed to access method '" + method.getName() + "': " + ex);
}
}
if (clazz.getSuperclass() != null && (mf != USER_DECLARED_METHODS || clazz.getSuperclass() != Object.class)) {
doWithMethods(clazz.getSuperclass(), mc, mf);
} else if (clazz.isInterface()) {
for (Class superIfc : clazz.getInterfaces()) {
doWithMethods(superIfc, mc, mf);
}
}
}
/**
* Get all declared methods on the leaf class and all superclasses.
* Leaf class methods are included first.
*
* @param leafClass the class to introspect
* @throws IllegalStateException if introspection fails
*/
public static Method[] getAllDeclaredMethods(Class leafClass) {
final List methods = new ArrayList<>(32);
doWithMethods(leafClass, methods::add);
return methods.toArray(EMPTY_METHOD_ARRAY);
}
/**
* Get the unique set of declared methods on the leaf class and all superclasses.
* Leaf class methods are included first and while traversing the superclass hierarchy
* any methods found with signatures matching a method already included are filtered out.
*
* @param leafClass the class to introspect
* @throws IllegalStateException if introspection fails
*/
public static Method[] getUniqueDeclaredMethods(Class leafClass) {
return getUniqueDeclaredMethods(leafClass, null);
}
/**
* Get the unique set of declared methods on the leaf class and all superclasses.
* Leaf class methods are included first and while traversing the superclass hierarchy
* any methods found with signatures matching a method already included are filtered out.
*
* @param leafClass the class to introspect
* @param mf the filter that determines the methods to take into account
* @throws IllegalStateException if introspection fails
* @since 5.2
*/
public static Method[] getUniqueDeclaredMethods(Class leafClass, MethodFilter mf) {
final List methods = new ArrayList<>(32);
doWithMethods(leafClass, method -> {
boolean knownSignature = false;
Method methodBeingOverriddenWithCovariantReturnType = null;
for (Method existingMethod : methods) {
if (method.getName().equals(existingMethod.getName()) &&
Arrays.equals(method.getParameterTypes(), existingMethod.getParameterTypes())) {
// Is this a covariant return type situation?
if (existingMethod.getReturnType() != method.getReturnType() &&
existingMethod.getReturnType().isAssignableFrom(method.getReturnType())) {
methodBeingOverriddenWithCovariantReturnType = existingMethod;
} else {
knownSignature = true;
}
break;
}
}
if (methodBeingOverriddenWithCovariantReturnType != null) {
methods.remove(methodBeingOverriddenWithCovariantReturnType);
}
if (!knownSignature && !isCglibRenamedMethod(method)) {
methods.add(method);
}
}, mf);
return methods.toArray(EMPTY_METHOD_ARRAY);
}
/**
* Variant of {@link Class#getDeclaredMethods()} that uses a local cache in
* order to avoid the JVM's SecurityManager check and new Method instances.
* In addition, it also includes Java 8 default methods from locally
* implemented interfaces, since those are effectively to be treated just
* like declared methods.
*
* @param clazz the class to introspect
* @return the cached array of methods
* @throws IllegalStateException if introspection fails
* @see Class#getDeclaredMethods()
* @since 5.2
*/
public static Method[] getDeclaredMethods(Class clazz) {
return getDeclaredMethods(clazz, true);
}
private static Method[] getDeclaredMethods(Class clazz, boolean defensive) {
Method[] result = declaredMethodsCache.get(clazz);
if (result == null) {
try {
Method[] declaredMethods = clazz.getDeclaredMethods();
List defaultMethods = findConcreteMethodsOnInterfaces(clazz);
if (defaultMethods != null) {
result = new Method[declaredMethods.length + defaultMethods.size()];
System.arraycopy(declaredMethods, 0, result, 0, declaredMethods.length);
int index = declaredMethods.length;
for (Method defaultMethod : defaultMethods) {
result[index] = defaultMethod;
index++;
}
} else {
result = declaredMethods;
}
declaredMethodsCache.put(clazz, (result.length == 0 ? EMPTY_METHOD_ARRAY : result));
} catch (Throwable ex) {
throw new IllegalStateException("Failed to introspect Class [" + clazz.getName() +
"] from ClassLoader [" + clazz.getClassLoader() + "]", ex);
}
}
return (result.length == 0 || !defensive) ? result : result.clone();
}
private static List findConcreteMethodsOnInterfaces(Class clazz) {
List result = null;
for (Class ifc : clazz.getInterfaces()) {
for (Method ifcMethod : ifc.getMethods()) {
if (!Modifier.isAbstract(ifcMethod.getModifiers())) {
if (result == null) {
result = new ArrayList<>();
}
result.add(ifcMethod);
}
}
}
return result;
}
/**
* Determine whether the given method is an "equals" method.
*
* @see java.lang.Object#equals(Object)
*/
public static boolean isEqualsMethod(Method method) {
if (method == null || !method.getName().equals("equals")) {
return false;
}
Class[] paramTypes = method.getParameterTypes();
return (paramTypes.length == 1 && paramTypes[0] == Object.class);
}
/**
* Determine whether the given method is a "hashCode" method.
*
* @see java.lang.Object#hashCode()
*/
public static boolean isHashCodeMethod(Method method) {
return (method != null && method.getName().equals("hashCode") && method.getParameterCount() == 0);
}
/**
* Determine whether the given method is a "toString" method.
*
* @see java.lang.Object#toString()
*/
public static boolean isToStringMethod(Method method) {
return (method != null && method.getName().equals("toString") && method.getParameterCount() == 0);
}
/**
* Determine whether the given method is originally declared by {@link java.lang.Object}.
*/
public static boolean isObjectMethod(Method method) {
return (method != null && (method.getDeclaringClass() == Object.class ||
isEqualsMethod(method) || isHashCodeMethod(method) || isToStringMethod(method)));
}
/**
* Determine whether the given method is a CGLIB 'renamed' method,
* following the pattern "CGLIB$methodName$0".
*
* @param renamedMethod the method to check
*/
public static boolean isCglibRenamedMethod(Method renamedMethod) {
String name = renamedMethod.getName();
if (name.startsWith(CGLIB_RENAMED_METHOD_PREFIX)) {
int i = name.length() - 1;
while (i >= 0 && Character.isDigit(name.charAt(i))) {
i--;
}
return (i > CGLIB_RENAMED_METHOD_PREFIX.length() && (i < name.length() - 1) && name.charAt(i) == '$');
}
return false;
}
/**
* Make the given method accessible, explicitly setting it accessible if
* necessary. The {@code setAccessible(true)} method is only called
* when actually necessary, to avoid unnecessary conflicts with a JVM
* SecurityManager (if active).
*
* @param method the method to make accessible
* @see java.lang.reflect.Method#setAccessible
*/
@SuppressWarnings("deprecation") // on JDK 9
public static void makeAccessible(Method method) {
if ((!Modifier.isPublic(method.getModifiers()) ||
!Modifier.isPublic(method.getDeclaringClass().getModifiers())) && !method.isAccessible()) {
method.setAccessible(true);
}
}
// Field handling
/**
* Attempt to find a {@link Field field} on the supplied {@link Class} with the
* supplied {@code name}. Searches all superclasses up to {@link Object}.
*
* @param clazz the class to introspect
* @param name the name of the field
* @return the corresponding Field object, or {@code null} if not found
*/
public static Field findField(Class clazz, String name) {
return findField(clazz, name, null);
}
/**
* Attempt to find a {@link Field field} on the supplied {@link Class} with the
* supplied {@code name} and/or {@link Class type}. Searches all superclasses
* up to {@link Object}.
*
* @param clazz the class to introspect
* @param name the name of the field (may be {@code null} if type is specified)
* @param type the type of the field (may be {@code null} if name is specified)
* @return the corresponding Field object, or {@code null} if not found
*/
public static Field findField(Class clazz, String name, Class type) {
Class searchType = clazz;
while (Object.class != searchType && searchType != null) {
Field[] fields = getDeclaredFields(searchType);
for (Field field : fields) {
if ((name == null || name.equals(field.getName())) &&
(type == null || type.equals(field.getType()))) {
return field;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
/**
* Set the field represented by the supplied {@linkplain Field field object} on
* the specified {@linkplain Object target object} to the specified {@code value}.
* In accordance with {@link Field#set(Object, Object)} semantics, the new value
* is automatically unwrapped if the underlying field has a primitive type.
*
This method does not support setting {@code static final} fields.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException(Exception)}.
*
* @param field the field to set
* @param target the target object on which to set the field
* @param value the value to set (may be {@code null})
*/
public static void setField(Field field, Object target, Object value) {
try {
field.set(target, value);
} catch (IllegalAccessException ex) {
handleReflectionException(ex);
}
}
/**
* Get the field represented by the supplied {@link Field field object} on the
* specified {@link Object target object}. In accordance with {@link Field#get(Object)}
* semantics, the returned value is automatically wrapped if the underlying field
* has a primitive type.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException(Exception)}.
*
* @param field the field to get
* @param target the target object from which to get the field
* @return the field's current value
*/
public static Object getField(Field field, Object target) {
try {
return field.get(target);
} catch (IllegalAccessException ex) {
handleReflectionException(ex);
}
throw new IllegalStateException("Should never get here");
}
/**
* Invoke the given callback on all locally declared fields in the given class.
*
* @param clazz the target class to analyze
* @param fc the callback to invoke for each field
* @throws IllegalStateException if introspection fails
* @see #doWithFields
* @since 4.2
*/
public static void doWithLocalFields(Class clazz, FieldCallback fc) {
for (Field field : getDeclaredFields(clazz)) {
try {
fc.doWith(field);
} catch (IllegalAccessException ex) {
throw new IllegalStateException("Not allowed to access field '" + field.getName() + "': " + ex);
}
}
}
/**
* Invoke the given callback on all fields in the target class, going up the
* class hierarchy to get all declared fields.
*
* @param clazz the target class to analyze
* @param fc the callback to invoke for each field
* @throws IllegalStateException if introspection fails
*/
public static void doWithFields(Class clazz, FieldCallback fc) {
doWithFields(clazz, fc, null);
}
/**
* Invoke the given callback on all fields in the target class, going up the
* class hierarchy to get all declared fields.
*
* @param clazz the target class to analyze
* @param fc the callback to invoke for each field
* @param ff the filter that determines the fields to apply the callback to
* @throws IllegalStateException if introspection fails
*/
public static void doWithFields(Class clazz, FieldCallback fc, FieldFilter ff) {
// Keep backing up the inheritance hierarchy.
Class targetClass = clazz;
do {
Field[] fields = getDeclaredFields(targetClass);
for (Field field : fields) {
if (ff != null && !ff.matches(field)) {
continue;
}
try {
fc.doWith(field);
} catch (IllegalAccessException ex) {
throw new IllegalStateException("Not allowed to access field '" + field.getName() + "': " + ex);
}
}
targetClass = targetClass.getSuperclass();
}
while (targetClass != null && targetClass != Object.class);
}
/**
* This variant retrieves {@link Class#getDeclaredFields()} from a local cache
* in order to avoid the JVM's SecurityManager check and defensive array copying.
*
* @param clazz the class to introspect
* @return the cached array of fields
* @throws IllegalStateException if introspection fails
* @see Class#getDeclaredFields()
*/
private static Field[] getDeclaredFields(Class clazz) {
Field[] result = declaredFieldsCache.get(clazz);
if (result == null) {
try {
result = clazz.getDeclaredFields();
declaredFieldsCache.put(clazz, (result.length == 0 ? EMPTY_FIELD_ARRAY : result));
} catch (Throwable ex) {
throw new IllegalStateException("Failed to introspect Class [" + clazz.getName() +
"] from ClassLoader [" + clazz.getClassLoader() + "]", ex);
}
}
return result;
}
/**
* Given the source object and the destination, which must be the same class
* or a subclass, copy all fields, including inherited fields. Designed to
* work on objects with public no-arg constructors.
*
* @throws IllegalStateException if introspection fails
*/
public static void shallowCopyFieldState(final Object src, final Object dest) {
if (!src.getClass().isAssignableFrom(dest.getClass())) {
throw new IllegalArgumentException("Destination class [" + dest.getClass().getName() +
"] must be same or subclass as source class [" + src.getClass().getName() + "]");
}
doWithFields(src.getClass(), field -> {
makeAccessible(field);
Object srcValue = field.get(src);
field.set(dest, srcValue);
}, COPYABLE_FIELDS);
}
/**
* Determine whether the given field is a "public static final" constant.
*
* @param field the field to check
*/
public static boolean isPublicStaticFinal(Field field) {
int modifiers = field.getModifiers();
return (Modifier.isPublic(modifiers) && Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers));
}
/**
* Make the given field accessible, explicitly setting it accessible if
* necessary. The {@code setAccessible(true)} method is only called
* when actually necessary, to avoid unnecessary conflicts with a JVM
* SecurityManager (if active).
*
* @param field the field to make accessible
* @see java.lang.reflect.Field#setAccessible
*/
@SuppressWarnings("deprecation") // on JDK 9
public static void makeAccessible(Field field) {
if ((!Modifier.isPublic(field.getModifiers()) ||
!Modifier.isPublic(field.getDeclaringClass().getModifiers()) ||
Modifier.isFinal(field.getModifiers())) && !field.isAccessible()) {
field.setAccessible(true);
}
}
// Cache handling
/**
* Clear the internal method/field cache.
*
* @since 4.2.4
*/
public static void clearCache() {
declaredMethodsCache.clear();
declaredFieldsCache.clear();
}
/**
* Action to take on each method.
*/
@FunctionalInterface
public interface MethodCallback {
/**
* Perform an operation using the given method.
*
* @param method the method to operate on
*/
void doWith(Method method) throws IllegalArgumentException, IllegalAccessException;
}
/**
* Callback optionally used to filter methods to be operated on by a method callback.
*/
@FunctionalInterface
public interface MethodFilter {
/**
* Determine whether the given method matches.
*
* @param method the method to check
*/
boolean matches(Method method);
}
/**
* Callback interface invoked on each field in the hierarchy.
*/
@FunctionalInterface
public interface FieldCallback {
/**
* Perform an operation using the given field.
*
* @param field the field to operate on
*/
void doWith(Field field) throws IllegalArgumentException, IllegalAccessException;
}
/**
* Callback optionally used to filter fields to be operated on by a field callback.
*/
@FunctionalInterface
public interface FieldFilter {
/**
* Determine whether the given field matches.
*
* @param field the field to check
*/
boolean matches(Field field);
}
}
