/
XmlBuilder.java
708 lines (610 loc) · 30.1 KB
/
XmlBuilder.java
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/*
* 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 org.apache.bval.jsr.metadata;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.AnnotatedParameterizedType;
import java.lang.reflect.AnnotatedType;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Executable;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.validation.ConstraintDeclarationException;
import javax.validation.ConstraintTarget;
import javax.validation.Payload;
import javax.validation.ValidationException;
import javax.validation.groups.Default;
import javax.xml.bind.JAXBElement;
import org.apache.bval.jsr.ApacheValidatorFactory;
import org.apache.bval.jsr.ConstraintAnnotationAttributes;
import org.apache.bval.jsr.groups.GroupConversion;
import org.apache.bval.jsr.util.AnnotationProxyBuilder;
import org.apache.bval.jsr.util.ToUnmodifiable;
import org.apache.bval.jsr.xml.AnnotationType;
import org.apache.bval.jsr.xml.BeanType;
import org.apache.bval.jsr.xml.ClassType;
import org.apache.bval.jsr.xml.ConstraintMappingsType;
import org.apache.bval.jsr.xml.ConstraintType;
import org.apache.bval.jsr.xml.ConstructorType;
import org.apache.bval.jsr.xml.ContainerElementTypeType;
import org.apache.bval.jsr.xml.CrossParameterType;
import org.apache.bval.jsr.xml.ElementType;
import org.apache.bval.jsr.xml.FieldType;
import org.apache.bval.jsr.xml.GetterType;
import org.apache.bval.jsr.xml.GroupConversionType;
import org.apache.bval.jsr.xml.GroupSequenceType;
import org.apache.bval.jsr.xml.GroupsType;
import org.apache.bval.jsr.xml.MappingValidator;
import org.apache.bval.jsr.xml.MethodType;
import org.apache.bval.jsr.xml.ParameterType;
import org.apache.bval.jsr.xml.PayloadType;
import org.apache.bval.jsr.xml.ReturnValueType;
import org.apache.bval.util.Exceptions;
import org.apache.bval.util.Lazy;
import org.apache.bval.util.ObjectUtils;
import org.apache.bval.util.StringUtils;
import org.apache.bval.util.Validate;
import org.apache.bval.util.reflection.Reflection;
import org.apache.commons.weaver.privilizer.Privilizing;
import org.apache.commons.weaver.privilizer.Privilizing.CallTo;
@Privilizing(@CallTo(Reflection.class))
public class XmlBuilder {
//@formatter:off
public enum Version {
v10("1.0"), v11("1.1"), v20("2.0");
//@formatter:on
static Version of(ConstraintMappingsType constraintMappings) {
Validate.notNull(constraintMappings);
String version = constraintMappings.getVersion();
if (StringUtils.isBlank(version)) {
return v10;
}
version = version.trim();
for (Version candidate : values()) {
if (candidate.id.equals(version)) {
return candidate;
}
}
throw new ValidationException("Unknown schema version: " + version);
}
private final String id;
private Version(String number) {
this.id = number;
}
public String getId() {
return id;
}
}
private class ForBean<T> implements MetadataBuilder.ForBean<T> {
private final BeanType descriptor;
ForBean(BeanType descriptor) {
super();
this.descriptor = Validate.notNull(descriptor, "descriptor");
}
Class<?> getBeanClass() {
return resolveClass(descriptor.getClazz());
}
@Override
public MetadataBuilder.ForClass<T> getClass(Meta<Class<T>> meta) {
final ClassType classType = descriptor.getClassType();
return classType == null ? EmptyBuilder.instance().<T> forBean().getClass(meta)
: new XmlBuilder.ForClass<T>(classType);
}
@Override
public Map<String, MetadataBuilder.ForContainer<Field>> getFields(Meta<Class<T>> meta) {
return descriptor.getField().stream()
.collect(ToUnmodifiable.map(FieldType::getName, XmlBuilder.ForField::new));
}
@Override
public Map<String, MetadataBuilder.ForContainer<Method>> getGetters(Meta<Class<T>> meta) {
return descriptor.getGetter().stream()
.collect(ToUnmodifiable.map(GetterType::getName, XmlBuilder.ForGetter::new));
}
@Override
public Map<Signature, MetadataBuilder.ForExecutable<Constructor<? extends T>>> getConstructors(Meta<Class<T>> meta) {
if (!atLeast(Version.v11)) {
return Collections.emptyMap();
}
final Function<ConstructorType, Class<?>[]> params = ct -> ct.getParameter().stream()
.map(ParameterType::getType).map(XmlBuilder.this::resolveClass).toArray(Class[]::new);
final Function<ConstructorType, Signature> signature =
ct -> new Signature(meta.getHost().getName(), params.apply(ct));
return descriptor.getConstructor().stream()
.collect(Collectors.toMap(signature, XmlBuilder.ForConstructor::new));
}
@Override
public Map<Signature, MetadataBuilder.ForExecutable<Method>> getMethods(Meta<Class<T>> meta) {
if (!atLeast(Version.v11)) {
return Collections.emptyMap();
}
final Function<MethodType, Class<?>[]> params = mt -> mt.getParameter().stream().map(ParameterType::getType)
.map(XmlBuilder.this::resolveClass).toArray(Class[]::new);
final Function<MethodType, Signature> signature = mt -> new Signature(mt.getName(), params.apply(mt));
return descriptor.getMethod().stream().collect(Collectors.toMap(signature, XmlBuilder.ForMethod::new));
}
@Override
public final AnnotationBehavior getAnnotationBehavior() {
return descriptor.getIgnoreAnnotations() ? AnnotationBehavior.EXCLUDE : AnnotationBehavior.INCLUDE;
}
}
private class NonRootLevel<SELF extends NonRootLevel<SELF, D>, D> implements HasAnnotationBehavior {
protected final D descriptor;
private Lazy<Boolean> getIgnoreAnnotations;
public NonRootLevel(D descriptor) {
super();
this.descriptor = Validate.notNull(descriptor, "descriptor");
}
@Override
public final AnnotationBehavior getAnnotationBehavior() {
return Optional.ofNullable(getIgnoreAnnotations).map(Lazy::get)
.map(b -> b.booleanValue() ? AnnotationBehavior.EXCLUDE : AnnotationBehavior.INCLUDE)
.orElse(AnnotationBehavior.ABSTAIN);
}
@SuppressWarnings("unchecked")
final SELF withGetIgnoreAnnotations(Function<D, Boolean> getIgnoreAnnotations) {
Validate.notNull(getIgnoreAnnotations);
this.getIgnoreAnnotations = new Lazy<>(() -> getIgnoreAnnotations.apply(descriptor));
return (SELF) this;
}
}
private class ForElement<SELF extends XmlBuilder.ForElement<SELF, E, D>, E extends AnnotatedElement, D>
extends NonRootLevel<SELF, D> implements MetadataBuilder.ForElement<E> {
private Lazy<Annotation[]> getDeclaredConstraints;
ForElement(D descriptor) {
super(descriptor);
}
@Override
public final Annotation[] getDeclaredConstraints(Meta<E> meta) {
return lazy(getDeclaredConstraints, "getDeclaredConstraints");
}
final SELF withGetConstraintTypes(Function<D, List<ConstraintType>> getConstraintTypes) {
return withGetDeclaredConstraints(getConstraintTypes
.andThen(l -> l.stream().map(XmlBuilder.this::createConstraint).toArray(Annotation[]::new)));
}
@SuppressWarnings("unchecked")
final SELF withGetDeclaredConstraints(Function<D, Annotation[]> getDeclaredConstraints) {
this.getDeclaredConstraints = new Lazy<>(() -> getDeclaredConstraints.apply(descriptor));
return (SELF) this;
}
}
private class ForClass<T> extends ForElement<ForClass<T>, Class<T>, ClassType> implements MetadataBuilder.ForClass<T> {
ForClass(ClassType descriptor) {
super(descriptor);
this.withGetConstraintTypes(ClassType::getConstraint)
.withGetIgnoreAnnotations(ClassType::getIgnoreAnnotations);
}
@Override
public List<Class<?>> getGroupSequence(Meta<Class<T>> meta) {
final GroupSequenceType groupSequence = descriptor.getGroupSequence();
return groupSequence == null ? null
: groupSequence.getValue().stream().map(XmlBuilder.this::resolveClass).collect(ToUnmodifiable.list());
}
}
private class ForContainer<SELF extends XmlBuilder.ForContainer<SELF, E, D>, E extends AnnotatedElement, D>
extends XmlBuilder.ForElement<SELF, E, D> implements MetadataBuilder.ForContainer<E> {
private Lazy<Boolean> isCascade;
private Lazy<Set<GroupConversion>> getGroupConversions;
private Lazy<List<ContainerElementTypeType>> getContainerElementTypes;
ForContainer(D descriptor) {
super(descriptor);
}
@Override
public boolean isCascade(Meta<E> meta) {
return Boolean.TRUE.equals(lazy(isCascade, "isCascade"));
}
@Override
public Set<GroupConversion> getGroupConversions(Meta<E> meta) {
return lazy(getGroupConversions, "getGroupConversions");
}
@Override
public Map<ContainerElementKey, MetadataBuilder.ForContainer<AnnotatedType>> getContainerElementTypes(
Meta<E> meta) {
if (!atLeast(Version.v20)) {
return Collections.emptyMap();
}
final List<ContainerElementTypeType> elements = lazy(getContainerElementTypes, "getContainerElementTypes");
final AnnotatedType annotatedType = meta.getAnnotatedType();
final E host = meta.getHost();
if (annotatedType instanceof AnnotatedParameterizedType) {
final AnnotatedType[] actualTypeArguments =
((AnnotatedParameterizedType) annotatedType).getAnnotatedActualTypeArguments();
return elements.stream().collect(ToUnmodifiable.map(cet -> {
Integer typeArgumentIndex = cet.getTypeArgumentIndex();
if (typeArgumentIndex == null) {
Exceptions.raiseIf(actualTypeArguments.length > 1, ValidationException::new,
"Missing required type argument index for %s", host);
typeArgumentIndex = Integer.valueOf(0);
}
return new ContainerElementKey(annotatedType, typeArgumentIndex);
}, XmlBuilder.ForContainerElementType::new));
}
if (!elements.isEmpty()) {
Exceptions.raise(ValidationException::new, "Illegally specified %d container element type(s) for %s",
elements.size(), host);
}
return Collections.emptyMap();
}
@SuppressWarnings("unchecked")
SELF withGetValid(Function<D, String> getValid) {
Validate.notNull(getValid);
this.isCascade = new Lazy<>(() -> getValid.apply(descriptor) != null);
return (SELF) this;
}
@SuppressWarnings("unchecked")
SELF withGetGroupConversions(Function<D, List<GroupConversionType>> getGroupConversions) {
Validate.notNull(getGroupConversions);
this.getGroupConversions = new Lazy<>(() -> {
return getGroupConversions.apply(descriptor).stream().map(gc -> {
final String from = gc.getFrom();
final Class<?> source = from == null ? Default.class : resolveClass(from);
final Class<?> target = resolveClass(gc.getTo());
return GroupConversion.from(source).to(target);
}).collect(ToUnmodifiable.set());
});
return (SELF) this;
}
@SuppressWarnings("unchecked")
SELF withGetContainerElementTypes(Function<D, List<ContainerElementTypeType>> getContainerElementTypes) {
Validate.notNull(getContainerElementTypes);
this.getContainerElementTypes = new Lazy<>(() -> getContainerElementTypes.apply(descriptor));
return (SELF) this;
}
}
private class ForContainerElementType
extends ForContainer<ForContainerElementType, AnnotatedType, ContainerElementTypeType> {
ForContainerElementType(ContainerElementTypeType descriptor) {
super(descriptor);
this.withGetConstraintTypes(ContainerElementTypeType::getConstraint)
.withGetValid(ContainerElementTypeType::getValid)
.withGetGroupConversions(ContainerElementTypeType::getConvertGroup)
.withGetContainerElementTypes(ContainerElementTypeType::getContainerElementType);
}
}
private class ForField extends XmlBuilder.ForContainer<ForField, Field, FieldType> {
ForField(FieldType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(FieldType::getIgnoreAnnotations)
.withGetConstraintTypes(FieldType::getConstraint).withGetValid(FieldType::getValid)
.withGetGroupConversions(FieldType::getConvertGroup)
.withGetContainerElementTypes(FieldType::getContainerElementType);
}
}
private class ForGetter extends XmlBuilder.ForContainer<ForGetter, Method, GetterType> {
ForGetter(GetterType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(GetterType::getIgnoreAnnotations)
.withGetConstraintTypes(GetterType::getConstraint).withGetValid(GetterType::getValid)
.withGetGroupConversions(GetterType::getConvertGroup)
.withGetContainerElementTypes(GetterType::getContainerElementType);
}
}
private abstract class ForExecutable<SELF extends ForExecutable<SELF, E, D>, E extends Executable, D>
extends NonRootLevel<SELF, D> implements MetadataBuilder.ForExecutable<E> {
Lazy<ReturnValueType> getReturnValue;
Lazy<CrossParameterType> getCrossParameter;
Lazy<List<ParameterType>> getParameters;
ForExecutable(D descriptor) {
super(descriptor);
}
@Override
public MetadataBuilder.ForElement<E> getCrossParameter(Meta<E> meta) {
final CrossParameterType cp = lazy(getCrossParameter, "getCrossParameter");
if (cp == null) {
return EmptyBuilder.instance().<E> forExecutable().getCrossParameter(meta);
}
return new XmlBuilder.ForCrossParameter<>(cp);
}
@Override
public MetadataBuilder.ForContainer<E> getReturnValue(Meta<E> meta) {
final ReturnValueType rv = lazy(getReturnValue, "getReturnValue");
if (rv == null) {
return EmptyBuilder.instance().<E> forExecutable().getReturnValue(meta);
}
return new XmlBuilder.ForReturnValue<>(rv);
}
@Override
public List<MetadataBuilder.ForContainer<Parameter>> getParameters(Meta<E> meta) {
return lazy(getParameters, "getParameters").stream().map(XmlBuilder.ForParameter::new)
.collect(Collectors.toList());
}
@SuppressWarnings("unchecked")
SELF withGetReturnValue(Function<D, ReturnValueType> getReturnValue) {
Validate.notNull(getReturnValue);
this.getReturnValue = new Lazy<>(() -> getReturnValue.apply(descriptor));
return (SELF) this;
}
@SuppressWarnings("unchecked")
SELF withGetCrossParameter(Function<D, CrossParameterType> getCrossParameter) {
Validate.notNull(getCrossParameter);
this.getCrossParameter = new Lazy<>(() -> getCrossParameter.apply(descriptor));
return (SELF) this;
}
@SuppressWarnings("unchecked")
SELF withGetParameters(Function<D, List<ParameterType>> getParameters) {
Validate.notNull(getParameters);
this.getParameters = new Lazy<>(() -> getParameters.apply(descriptor));
return (SELF) this;
}
}
private class ForConstructor<T> extends ForExecutable<ForConstructor<T>, Constructor<? extends T>, ConstructorType> {
ForConstructor(ConstructorType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(ConstructorType::getIgnoreAnnotations)
.withGetReturnValue(ConstructorType::getReturnValue)
.withGetCrossParameter(ConstructorType::getCrossParameter)
.withGetParameters(ConstructorType::getParameter);
}
}
private class ForMethod extends ForExecutable<ForMethod, Method, MethodType> {
ForMethod(MethodType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(MethodType::getIgnoreAnnotations)
.withGetReturnValue(MethodType::getReturnValue).withGetCrossParameter(MethodType::getCrossParameter)
.withGetParameters(MethodType::getParameter);
}
}
private class ForParameter extends ForContainer<ForParameter, Parameter, ParameterType> {
ForParameter(ParameterType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(ParameterType::getIgnoreAnnotations)
.withGetConstraintTypes(ParameterType::getConstraint).withGetValid(ParameterType::getValid)
.withGetGroupConversions(ParameterType::getConvertGroup)
.withGetContainerElementTypes(ParameterType::getContainerElementType);
}
}
private class ForCrossParameter<E extends Executable>
extends ForElement<ForCrossParameter<E>, E, CrossParameterType> {
ForCrossParameter(CrossParameterType descriptor) {
super(descriptor);
this.withGetIgnoreAnnotations(CrossParameterType::getIgnoreAnnotations)
.withGetDeclaredConstraints(d -> d.getConstraint().stream()
.map(ct -> createConstraint(ct, ConstraintTarget.PARAMETERS)).toArray(Annotation[]::new));
}
}
private class ForReturnValue<E extends Executable> extends ForContainer<ForReturnValue<E>, E, ReturnValueType> {
ForReturnValue(ReturnValueType descriptor) {
super(descriptor);
this.withGetDeclaredConstraints(d -> d.getConstraint().stream()
.map(ct -> createConstraint(ct, ConstraintTarget.RETURN_VALUE)).toArray(Annotation[]::new))
.withGetIgnoreAnnotations(ReturnValueType::getIgnoreAnnotations).withGetValid(ReturnValueType::getValid)
.withGetGroupConversions(ReturnValueType::getConvertGroup)
.withGetContainerElementTypes(ReturnValueType::getContainerElementType);
}
}
private static final <T> T lazy(Lazy<T> lazy, String name) {
Validate.validState(lazy != null, "%s not set", name);
return lazy.get();
}
private final ApacheValidatorFactory validatorFactory;
private final ConstraintMappingsType constraintMappings;
private final Version version;
public XmlBuilder(ApacheValidatorFactory validatorFactory, ConstraintMappingsType constraintMappings) {
super();
this.validatorFactory = Validate.notNull(validatorFactory, "validatorFactory");
this.constraintMappings = Validate.notNull(constraintMappings, "constraintMappings");
this.version = Version.of(constraintMappings);
new MappingValidator(constraintMappings, this::resolveClass).validateMappings();
}
public Map<Class<?>, MetadataBuilder.ForBean<?>> forBeans() {
return constraintMappings.getBean().stream().map(XmlBuilder.ForBean::new)
.collect(ToUnmodifiable.map(XmlBuilder.ForBean::getBeanClass, Function.identity()));
}
public String getDefaultPackage() {
return constraintMappings.getDefaultPackage();
}
boolean atLeast(Version v) {
return version.compareTo(v) >= 0;
}
<T> Class<T> resolveClass(String className) {
return loadClass(toQualifiedClassName(className));
}
private String toQualifiedClassName(String className) {
if (isQualifiedClass(className)) {
return className;
}
if (className.startsWith("[L") && className.endsWith(";")) {
return "[L" + getDefaultPackage() + "." + className.substring(2);
}
return getDefaultPackage() + "." + className;
}
private boolean isQualifiedClass(String clazz) {
return clazz.indexOf('.') >= 0;
}
@SuppressWarnings("unchecked")
private <T> Class<T> loadClass(final String fqn) {
ClassLoader loader = Reflection.loaderFromThreadOrClass(XmlBuilder.class);
if (loader == null) {
loader = getClass().getClassLoader();
}
try {
return (Class<T>) Class.forName(fqn, true, loader);
} catch (ClassNotFoundException ex) {
throw Exceptions.create(ValidationException::new, ex, "Unable to load class: %d", fqn);
}
}
private Class<?>[] loadClasses(Supplier<Stream<String>> classNames) {
return streamClasses(classNames).toArray(Class[]::new);
}
private Stream<Class<?>> streamClasses(Supplier<Stream<String>> classNames) {
return classNames.get().map(this::loadClass);
}
private <A extends Annotation, T> A createConstraint(final ConstraintType constraint) {
return createConstraint(constraint, ConstraintTarget.IMPLICIT);
}
private <A extends Annotation, T> A createConstraint(final ConstraintType constraint, ConstraintTarget target) {
final Class<A> annotationClass = this.<A> loadClass(toQualifiedClassName(constraint.getAnnotation()));
final AnnotationProxyBuilder<A> annoBuilder =
validatorFactory.getAnnotationsManager().buildProxyFor(annotationClass);
if (constraint.getMessage() != null) {
annoBuilder.setMessage(constraint.getMessage());
}
annoBuilder.setGroups(getGroups(constraint.getGroups()));
annoBuilder.setPayload(getPayload(constraint.getPayload()));
if (ConstraintAnnotationAttributes.VALIDATION_APPLIES_TO.analyze(annotationClass).isValid()) {
annoBuilder.setValidationAppliesTo(target);
}
for (final ElementType elementType : constraint.getElement()) {
final String name = elementType.getName();
final Class<?> returnType = getAnnotationParameterType(annotationClass, name);
final Object elementValue = getElementValue(elementType, returnType);
annoBuilder.setValue(name, elementValue);
}
return annoBuilder.createAnnotation();
}
private <A extends Annotation> Class<?> getAnnotationParameterType(final Class<A> annotationClass,
final String name) {
final Method m = Reflection.getPublicMethod(annotationClass, name);
Exceptions.raiseIf(m == null, ValidationException::new,
"Annotation of type %s does not contain a parameter %s.", annotationClass.getName(), name);
return m.getReturnType();
}
private Object getElementValue(ElementType elementType, Class<?> returnType) {
removeEmptyContentElements(elementType);
final List<Serializable> content = elementType.getContent();
final int sz = content.size();
if (returnType.isArray()) {
final Object result = Array.newInstance(returnType.getComponentType(), sz);
for (int i = 0; i < sz; i++) {
Array.set(result, i, getSingleValue(content.get(i), returnType.getComponentType()));
}
return result;
}
Exceptions.raiseIf(sz != 1, ValidationException::new,
"Attempt to specify an array where single value is expected.");
return getSingleValue(content.get(0), returnType);
}
private void removeEmptyContentElements(ElementType elementType) {
for (Iterator<Serializable> iter = elementType.getContent().iterator(); iter.hasNext();) {
final Serializable content = iter.next();
if (content instanceof String && ((String) content).matches("[\\n ].*")) {
iter.remove();
}
}
}
@SuppressWarnings("unchecked")
private Object getSingleValue(Serializable serializable, Class<?> returnType) {
if (serializable instanceof String) {
return convertToResultType(returnType, (String) serializable);
}
if (serializable instanceof JAXBElement<?>) {
final JAXBElement<?> elem = (JAXBElement<?>) serializable;
if (String.class.equals(elem.getDeclaredType())) {
return convertToResultType(returnType, (String) elem.getValue());
}
if (AnnotationType.class.equals(elem.getDeclaredType())) {
AnnotationType annotationType = (AnnotationType) elem.getValue();
try {
return createAnnotation(annotationType, (Class<? extends Annotation>) returnType);
} catch (ClassCastException e) {
throw new ValidationException("Unexpected parameter value");
}
}
}
throw new ValidationException("Unexpected parameter value");
}
private Object convertToResultType(Class<?> returnType, String value) {
/**
* Class is represented by the fully qualified class name of the class. spec: Note that if the raw string is
* unqualified, default package is taken into account.
*/
if (String.class.equals(returnType)) {
return value;
}
if (Class.class.equals(returnType)) {
return resolveClass(value);
}
if (returnType.isEnum()) {
try {
@SuppressWarnings({ "rawtypes", "unchecked" })
final Enum e = Enum.valueOf(returnType.asSubclass(Enum.class), value);
return e;
} catch (IllegalArgumentException e) {
throw new ConstraintDeclarationException(e);
}
}
try {
if (Byte.class.equals(returnType) || byte.class.equals(returnType)) {
// spec mandates it:
return Byte.parseByte(value);
}
if (Short.class.equals(returnType) || short.class.equals(returnType)) {
return Short.parseShort(value);
}
if (Integer.class.equals(returnType) || int.class.equals(returnType)) {
return Integer.parseInt(value);
}
if (Long.class.equals(returnType) || long.class.equals(returnType)) {
return Long.parseLong(value);
}
if (Float.class.equals(returnType) || float.class.equals(returnType)) {
return Float.parseFloat(value);
}
if (Double.class.equals(returnType) || double.class.equals(returnType)) {
return Double.parseDouble(value);
}
if (Boolean.class.equals(returnType) || boolean.class.equals(returnType)) {
return Boolean.parseBoolean(value);
}
} catch (Exception e) {
Exceptions.raise(ValidationException::new, e, "Unable to coerce value '%s' to %s", value, returnType);
}
if (Character.class.equals(returnType) || char.class.equals(returnType)) {
Exceptions.raiseIf(value.length() > 1, ConstraintDeclarationException::new,
"a char must have a length of 1");
return value.charAt(0);
}
return Exceptions.raise(ValidationException::new, "Unknown annotation value type %s", returnType.getName());
}
private <A extends Annotation> Annotation createAnnotation(AnnotationType annotationType, Class<A> returnType) {
final AnnotationProxyBuilder<A> metaAnnotation =
validatorFactory.getAnnotationsManager().buildProxyFor(returnType);
for (ElementType elementType : annotationType.getElement()) {
final String name = elementType.getName();
metaAnnotation.setValue(name, getElementValue(elementType, getAnnotationParameterType(returnType, name)));
}
return metaAnnotation.createAnnotation();
}
private Class<?>[] getGroups(GroupsType groupsType) {
if (groupsType == null) {
return ObjectUtils.EMPTY_CLASS_ARRAY;
}
return loadClasses(groupsType.getValue()::stream);
}
@SuppressWarnings("unchecked")
private Class<? extends Payload>[] getPayload(PayloadType payloadType) {
if (payloadType == null) {
return (Class<? extends Payload>[]) ObjectUtils.EMPTY_CLASS_ARRAY;
}
return streamClasses(payloadType.getValue()::stream).peek(pc -> {
Exceptions.raiseUnless(Payload.class.isAssignableFrom(pc), ConstraintDeclarationException::new,
"Specified payload class %s does not implement %s", pc.getName(), Payload.class.getName());
}).<Class<? extends Payload>> map(pc -> pc.asSubclass(Payload.class)).toArray(Class[]::new);
}
}