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Copy pathValidator.java
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388 lines (356 loc) · 17.5 KB
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package org.javawebstack.validator;
import com.google.gson.annotations.SerializedName;
import org.javawebstack.abstractdata.AbstractArray;
import org.javawebstack.abstractdata.AbstractElement;
import org.javawebstack.abstractdata.AbstractMapper;
import org.javawebstack.abstractdata.AbstractNull;
import org.javawebstack.validator.rule.*;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.sql.Date;
import java.sql.Timestamp;
import java.util.*;
public class Validator {
private static final Map<String, Constructor<? extends ValidationRule>> validationRules = new HashMap<>();
private static final Map<Class<?>, Validator> validators = new HashMap<>();
private static final Map<Class<? extends ValidationRule>, Class<? extends Annotation>> ruleAnnotationClasses = new HashMap<>();
static {
registerRuleType("string", StringRule.Validator.class, StringRule.class);
registerRuleType("boolean", BooleanRule.Validator.class, BooleanRule.class);
registerRuleType("bool", BooleanRule.Validator.class, BooleanRule.class);
registerRuleType("enum", EnumRule.Validator.class, EnumRule.class);
registerRuleType("required", RequiredRule.Validator.class, RequiredRule.class);
registerRuleType("req", RequiredRule.Validator.class, RequiredRule.class);
registerRuleType("ipv4", IPv4AddressRule.Validator.class, IPv4AddressRule.class);
registerRuleType("ipv6", IPv6AddressRule.Validator.class, IPv6AddressRule.class);
registerRuleType("int", IntegerRule.Validator.class, IntegerRule.class);
registerRuleType("integer", IntegerRule.Validator.class, IntegerRule.class);
registerRuleType("numeric", NumericRule.Validator.class, NumericRule.class);
registerRuleType("num", NumericRule.Validator.class, NumericRule.class);
registerRuleType("date", DateRule.Validator.class, DateRule.class);
registerRuleType("array", ArrayRule.Validator.class, ArrayRule.class);
registerRuleType("list", ArrayRule.Validator.class, ArrayRule.class);
registerRuleType("alpha", AlphaRule.Validator.class, AlphaRule.class);
registerRuleType("alpha_num", AlphaNumRule.Validator.class, AlphaNumRule.class);
registerRuleType("alpha_dash", AlphaDashRule.Validator.class, AlphaDashRule.class);
registerRuleType("email", EmailRule.Validator.class, EmailRule.class);
registerRuleType("regex", RegexRule.Validator.class, RegexRule.class);
registerRuleType("uuid", UUIDRule.Validator.class, UUIDRule.class);
}
public static void registerRuleType(String name, Class<? extends ValidationRule> type, Class<? extends Annotation> annotationClass) {
if (!ruleAnnotationClasses.containsKey(type) && annotationClass != null)
ruleAnnotationClasses.put(type, annotationClass);
try {
Constructor<? extends ValidationRule> constructor = type.getDeclaredConstructor(String[].class);
constructor.setAccessible(true);
validationRules.put(name, constructor);
return;
} catch (NoSuchMethodException ignored) {
}
try {
Constructor<? extends ValidationRule> constructor = type.getDeclaredConstructor();
constructor.setAccessible(true);
validationRules.put(name, constructor);
} catch (NoSuchMethodException ignored) {
}
}
public static ValidationRule makeRule(String name, String[] params) {
Constructor<? extends ValidationRule> constructor = validationRules.get(name);
if (constructor == null)
return null;
if (constructor.getParameterCount() == 0) {
try {
return constructor.newInstance();
} catch (InstantiationException | InvocationTargetException | IllegalAccessException ignored) {
}
} else {
try {
return constructor.newInstance((Object) params);
} catch (InstantiationException | InvocationTargetException | IllegalAccessException ignored) {
}
}
return null;
}
public static ValidationRule makeRule(String source) {
String[] params = null;
if (source.contains("(")) {
String[] spl = source.split("\\(", 2);
source = spl[0];
String s = spl[1];
s = s.substring(0, s.length() - 1);
AbstractArray array = AbstractElement.fromJson("[" + s + "]").array();
if (array.stream().filter(e -> e.isPrimitive()).count() == array.size()) {
params = new String[array.size()];
for (int i = 0; i < params.length; i++)
params[i] = array.get(i).toString();
}
}
if (params == null)
params = new String[0];
return makeRule(source, params);
}
public static ValidationRule[] makeRules(String... sources) {
ValidationRule[] rules = new ValidationRule[sources.length];
for (int i = 0; i < rules.length; i++)
rules[i] = makeRule(sources[i]);
return rules;
}
public static Validator getValidator(Class<?> type) {
Validator validator = validators.get(type);
if (validator == null) {
validator = new Validator();
getClassRules(null, type).forEach(validator::rule);
validators.put(type, validator);
}
return validator;
}
public static <T> T map(ValidationContext context, Class<T> type, AbstractElement element, AbstractMapper mapper) {
Validator validator = getValidator(type);
ValidationResult result = validator.validate(context, element);
if (!result.isValid())
throw new ValidationException(result);
return mapper.fromAbstract(element, type);
}
public static <T> T map(ValidationContext context, Class<T> type, AbstractElement element) {
return map(context, type, element, new AbstractMapper());
}
private final Map<String[], ValidationConfig> rules = new HashMap<>();
public Validator rule(String[] key, ValidationRule... rules) {
return rule(key, Arrays.asList(rules));
}
public Validator rule(String[] key, List<ValidationRule> rules) {
this.rules.put(key, new ValidationConfig(null, rules));
return this;
}
private Validator rule(String[] key, ValidationConfig config) {
this.rules.put(key, config);
return this;
}
public Validator rule(String key, List<ValidationRule> rules) {
return rule(Arrays.stream(key.split("\\.")).map(k -> k.equals("*") ? null : k).toArray(String[]::new), rules);
}
public Validator rule(String key, ValidationRule... rules) {
return rule(key, Arrays.asList(rules));
}
public ValidationResult validate(ValidationContext context, AbstractElement rootElement) {
context.setValidator(this);
Map<String[], List<ValidationError>> errors = new HashMap<>();
for (String[] key : rules.keySet()) {
errors.putAll(check(context, rules, new String[0], new String[0], key, rootElement));
}
return new ValidationResult(context, errors);
}
private Map<String[], List<ValidationError>> check(ValidationContext context, Map<String[], ValidationConfig> rules, String[] keyPrefix, String[] resolvedKeyPrefix, String[] key, AbstractElement element) {
if (element == null)
element = AbstractNull.INSTANCE;
if (key.length == 0) {
Map<String[], List<ValidationError>> errors = new HashMap<>();
ValidationConfig config = getMapValue(rules, keyPrefix);
for (ValidationRule rule : config.rules) {
String error = rule.validate(context, config.field, element);
if (error != null) {
if (!errors.containsKey(resolvedKeyPrefix))
errors.put(resolvedKeyPrefix, new ArrayList<>());
errors.get(resolvedKeyPrefix).add(new ValidationError(rule, error));
}
}
return errors;
}
String[] innerKey = new String[key.length - 1];
System.arraycopy(key, 1, innerKey, 0, innerKey.length);
String[] innerKeyPrefix = new String[keyPrefix.length + 1];
System.arraycopy(keyPrefix, 0, innerKeyPrefix, 0, keyPrefix.length);
innerKeyPrefix[innerKeyPrefix.length - 1] = key[0];
if (key[0].equals("*")) {
Map<String[], List<ValidationError>> errors = new HashMap<>();
if (element.isArray()) {
for (int i = 0; i < element.array().size(); i++) {
String[] innerResolvedKeyPrefix = new String[keyPrefix.length + 1];
System.arraycopy(resolvedKeyPrefix, 0, innerResolvedKeyPrefix, 0, resolvedKeyPrefix.length);
innerResolvedKeyPrefix[innerResolvedKeyPrefix.length - 1] = String.valueOf(i);
errors.putAll(check(context, rules, innerKeyPrefix, innerResolvedKeyPrefix, innerKey, element.array().get(i)));
}
}
if (element.isObject()) {
for (String k : element.object().keys()) {
String[] innerResolvedKeyPrefix = new String[keyPrefix.length + 1];
System.arraycopy(resolvedKeyPrefix, 0, innerResolvedKeyPrefix, 0, resolvedKeyPrefix.length);
innerResolvedKeyPrefix[innerResolvedKeyPrefix.length - 1] = k;
errors.putAll(check(context, rules, innerKeyPrefix, innerResolvedKeyPrefix, innerKey, element.object().get(k)));
}
}
return errors;
}
AbstractElement value = AbstractNull.INSTANCE;
if (element.isArray()) {
try {
value = element.array().get(Integer.parseInt(key[0]));
} catch (Exception ignored) {
}
}
if (element.isObject()) {
value = element.object().get(key[0]);
}
String[] innerResolvedKeyPrefix = new String[keyPrefix.length + 1];
System.arraycopy(resolvedKeyPrefix, 0, innerResolvedKeyPrefix, 0, resolvedKeyPrefix.length);
innerResolvedKeyPrefix[innerResolvedKeyPrefix.length - 1] = key[0];
return check(context, rules, innerKeyPrefix, innerResolvedKeyPrefix, innerKey, value);
}
private static boolean stringArrayEqual(String[] a, String[] b) {
if (a.length != b.length)
return false;
for (int i = 0; i < a.length; i++) {
if (a[i] == null && b[i] == null)
continue;
if (a[i] == null || b[i] == null)
return false;
if (!a[i].equals(b[i]))
return false;
}
return true;
}
private static <V> V getMapValue(Map<String[], V> map, String[] key) {
for (String[] k : map.keySet()) {
if (stringArrayEqual(k, key)) {
return map.get(k);
}
}
return null;
}
private static <V> void putValidationConfigMapValue(Map<String[], ValidationConfig> map, String[] key, ValidationConfig value) {
for (String[] k : map.keySet()) {
if (stringArrayEqual(k, key)) {
map.put(k, value);
return;
}
}
map.put(key, value);
}
private static void addMapRules(Field field, Map<String[], ValidationConfig> map, String[] key, List<ValidationRule> rules) {
ValidationConfig config = getMapValue(map, key);
if (config == null)
config = new ValidationConfig(field, new ArrayList<>());
config.rules.addAll(rules);
putValidationConfigMapValue(map, key, config);
}
private static String toSnakeCase(String source) {
StringBuilder sb = new StringBuilder();
sb.append(Character.toLowerCase(source.charAt(0)));
for (int i = 1; i < source.length(); i++) {
if (Character.isUpperCase(source.charAt(i))) {
if (!Character.isUpperCase(source.charAt(i - 1)))
sb.append("_");
sb.append(Character.toLowerCase(source.charAt(i)));
} else {
sb.append(source.charAt(i));
}
}
return sb.toString();
}
private static String getFieldName(Field field) {
SerializedName[] serializedNames = field.getAnnotationsByType(SerializedName.class);
if (serializedNames.length > 0)
return serializedNames[0].value();
return toSnakeCase(field.getName());
}
private static class ValidationConfig {
private final Field field;
private final List<ValidationRule> rules;
public ValidationConfig(Field field, List<ValidationRule> rules) {
this.field = field;
this.rules = rules;
}
}
private static Map<String[], ValidationConfig> getClassRules(Field field, Class<?> type) {
Map<String[], ValidationConfig> rules = new HashMap<>();
if (type.isAnnotation())
return rules;
if (type.equals(String.class))
return rules;
if (type.equals(Long.class))
return rules;
if (type.equals(Timestamp.class) || type.equals(java.util.Date.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new DateRule.Validator(new String[]{}))));
return rules;
}
if (type.equals(Date.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new DateRule.Validator(new String[]{"date"}))));
return rules;
}
if (type.equals(Boolean.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new BooleanRule.Validator())));
return rules;
}
if (type.equals(Integer.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new IntegerRule.Validator(Integer.MIN_VALUE, Integer.MAX_VALUE))));
return rules;
}
if (type.equals(Double.class) || type.equals(Float.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new NumericRule.Validator())));
return rules;
}
if (type.equals(UUID.class)) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new UUIDRule.Validator())));
return rules;
}
if (type.isEnum()) {
rules.put(new String[0], new ValidationConfig(field, Collections.singletonList(new EnumRule.Validator((Class<? extends Enum<?>>) type))));
return rules;
}
if (type.isArray()) {
getClassRules(null, type.getComponentType()).forEach((key, validators) -> {
String[] actualKey = new String[key.length + 1];
actualKey[0] = "*";
System.arraycopy(key, 0, actualKey, 1, key.length);
addMapRules(null, rules, actualKey, validators.rules);
});
return rules;
}
for (Field f : getFieldsRecursive(type)) {
String name = getFieldName(f);
getClassRules(f, f.getType()).forEach((key, validators) -> {
String[] actualKey = new String[key.length + 1];
actualKey[0] = name;
System.arraycopy(key, 0, actualKey, 1, key.length);
addMapRules(f, rules, actualKey, validators.rules);
});
f.setAccessible(true);
Rule[] ruleAnnotations = f.getDeclaredAnnotationsByType(Rule.class);
if (ruleAnnotations.length > 0) {
List<ValidationRule> r = new ArrayList<>();
for (String source : ruleAnnotations[0].value()) {
ValidationRule rule = Validator.makeRule(source);
if (rule != null)
r.add(rule);
}
if (r.size() > 0)
addMapRules(f, rules, new String[]{name}, r);
}
ruleAnnotationClasses.entrySet().stream().distinct().forEach(annotation -> {
Annotation a = f.getDeclaredAnnotation(annotation.getValue());
if (a != null) {
List<ValidationRule> r = new ArrayList<>();
try {
Constructor<ValidationRule> constructor = (Constructor<ValidationRule>) annotation.getKey().getDeclaredConstructor(annotation.getValue());
constructor.setAccessible(true);
r.add(constructor.newInstance(a));
} catch (NoSuchMethodException | InvocationTargetException | InstantiationException | IllegalAccessException ignored) {}
if (r.size() > 0)
addMapRules(f, rules, new String[]{name}, r);
}
});
}
return rules;
}
private static List<Field> getFieldsRecursive(Class<?> type) {
List<Field> fields;
if (type.getSuperclass() != null && !type.getSuperclass().equals(Object.class))
fields = getFieldsRecursive(type.getSuperclass());
else
fields = new ArrayList<>();
fields.addAll(Arrays.asList(type.getDeclaredFields()));
return fields;
}
}