org.apache.bval.jsr303.ConstraintValidation Maven / Gradle / Ivy
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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.jsr303;
import org.apache.bval.jsr303.util.NodeImpl;
import org.apache.bval.jsr303.util.PathImpl;
import org.apache.bval.model.Validation;
import org.apache.bval.model.ValidationContext;
import org.apache.bval.model.ValidationListener;
import org.apache.bval.util.AccessStrategy;
import javax.validation.ConstraintDefinitionException;
import javax.validation.ConstraintValidator;
import javax.validation.Payload;
import javax.validation.ValidationException;
import javax.validation.metadata.ConstraintDescriptor;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.*;
/**
* Description: Adapter between Constraint (JSR303) and Validation (Core)
* this instance is immutable!
*/
public class ConstraintValidation implements Validation, ConstraintDescriptor {
private final ConstraintValidator validator;
private T annotation; // for metadata request API
private final AccessStrategy access;
private final boolean reportFromComposite;
private final Map attributes;
private Set> composedConstraints;
/**
* the owner is the type where the validation comes from. it is used to
* support implicit grouping.
*/
private final Class owner;
private Set> groups;
private Set> payload;
private Class>[] validatorClasses;
/**
* Create a new ConstraintValidation instance.
*
* @param validatorClasses
* @param validator
* - the constraint validator
* @param annotation
* - the annotation of the constraint
* @param owner
* - the type where the annotated element is placed (class,
* interface, annotation type)
* @param access
* - how to access the value
* @param reportFromComposite
*/
public ConstraintValidation(Class>[] validatorClasses,
ConstraintValidator validator, T annotation, Class owner, AccessStrategy access,
boolean reportFromComposite) {
this.attributes = new HashMap();
this.validatorClasses = validatorClasses;
this.validator = validator;
this.annotation = annotation;
this.owner = owner;
this.access = access;
this.reportFromComposite = reportFromComposite;
}
/**
* Return a {@link Serializable} {@link ConstraintDescriptor} capturing a
* snapshot of current state.
*
* @return {@link ConstraintDescriptor}
*/
public ConstraintDescriptor asSerializableDescriptor() {
return new ConstraintDescriptorImpl(this);
}
/**
* Set the applicable validation groups.
*
* @param groups
*/
void setGroups(Set> groups) {
this.groups = groups;
this.attributes.put(Jsr303MetaBeanFactory.ANNOTATION_GROUPS, groups.toArray(new Class[groups.size()]));
}
/**
* Set the payload.
*
* @param payload
*/
void setPayload(Set> payload) {
this.payload = payload;
this.attributes.put(Jsr303MetaBeanFactory.ANNOTATION_PAYLOAD, payload.toArray(new Class[payload.size()]));
}
/**
* {@inheritDoc}
*/
public boolean isReportAsSingleViolation() {
return reportFromComposite;
}
/**
* Add a composing constraint.
*
* @param aConstraintValidation
* to add
*/
public void addComposed(ConstraintValidation aConstraintValidation) {
if (composedConstraints == null) {
composedConstraints = new HashSet>();
}
composedConstraints.add(aConstraintValidation);
}
/**
* {@inheritDoc}
*/
public void validate(ValidationContext context) {
validate((GroupValidationContext) context);
}
/**
* Validate a {@link GroupValidationContext}.
*
* @param context
* root
*/
public void validate(GroupValidationContext context) {
context.setConstraintValidation(this);
/**
* execute unless the given validation constraint has already been
* processed during this validation routine (as part of a previous group
* match)
*/
if (!isMemberOf(context.getCurrentGroup().getGroup())) {
return; // do not validate in the current group
}
if (context.getCurrentOwner() != null && this.owner != context.getCurrentOwner()) {
return;
}
if (validator != null && !context.collectValidated(validator))
return; // already done
if (context.getMetaProperty() != null && !isReachable(context)) {
return;
}
// process composed constraints
if (isReportAsSingleViolation()) {
ConstraintValidationListener listener = context.getListener();
listener.beginReportAsSingle();
boolean failed = listener.hasViolations();
try {
// stop validating when already failed and
// ReportAsSingleInvalidConstraint = true ?
for (Iterator> composed = getComposingValidations().iterator(); !failed && composed.hasNext();) {
composed.next().validate(context);
failed = listener.hasViolations();
}
} finally {
listener.endReportAsSingle();
// Restore current constraint validation
context.setConstraintValidation(this);
}
if (failed) {
// TODO RSt - how should the composed constraint error report
// look like?
ConstraintValidatorContextImpl jsrContext = new ConstraintValidatorContextImpl(context, this);
addErrors(context, jsrContext); // add defaultErrorMessage only
return;
}
} else {
for (ConstraintValidation composed : getComposingValidations()) {
composed.validate(context);
}
// Restore current constraint validation
context.setConstraintValidation(this);
}
if (validator != null) {
ConstraintValidatorContextImpl jsrContext = new ConstraintValidatorContextImpl(context, this);
@SuppressWarnings("unchecked")
final ConstraintValidator objectValidator = (ConstraintValidator) validator;
if (!objectValidator.isValid(context.getValidatedValue(), jsrContext)) {
addErrors(context, jsrContext);
}
}
}
/**
* Initialize the validator (if not null) with the stored
* annotation.
*/
public void initialize() {
if (null != validator) {
try {
validator.initialize(annotation);
} catch (RuntimeException e) {
// Either a "legit" problem initializing the validator or a
// ClassCastException if the validator associated annotation is
// not a supertype of the validated annotation.
throw new ConstraintDefinitionException("Incorrect validator ["
+ validator.getClass().getCanonicalName() + "] for annotation "
+ annotation.annotationType().getCanonicalName(), e);
}
}
}
private boolean isReachable(GroupValidationContext context) {
PathImpl path = context.getPropertyPath();
NodeImpl node = path.getLeafNode();
PathImpl beanPath = path.getPathWithoutLeafNode();
if (beanPath == null) {
beanPath = PathImpl.create(null);
}
try {
if (!context.getTraversableResolver().isReachable(context.getBean(), node,
context.getRootMetaBean().getBeanClass(), beanPath, access.getElementType()))
return false;
} catch (RuntimeException e) {
throw new ValidationException("Error in TraversableResolver.isReachable() for " + context.getBean(), e);
}
return true;
}
private void addErrors(GroupValidationContext context, ConstraintValidatorContextImpl jsrContext) {
for (ValidationListener.Error each : jsrContext.getErrorMessages()) {
context.getListener().addError(each, context);
}
}
/**
* {@inheritDoc}
*/
public String toString() {
return "ConstraintValidation{" + validator + '}';
}
/**
* Get the message template used by this constraint.
*
* @return String
*/
public String getMessageTemplate() {
return (String) attributes.get(Jsr303MetaBeanFactory.ANNOTATION_MESSAGE);
}
/**
* Get the {@link ConstraintValidator} invoked by this
* {@link ConstraintValidation}.
*
* @return
*/
public ConstraintValidator getValidator() {
return validator;
}
/**
* Learn whether this {@link ConstraintValidation} belongs to the specified
* group.
*
* @param reqGroup
* @return boolean
*/
protected boolean isMemberOf(Class reqGroup) {
return groups.contains(reqGroup);
}
/**
* Get the owning class of this {@link ConstraintValidation}.
*
* @return Class
*/
public Class getOwner() {
return owner;
}
/**
* {@inheritDoc}
*/
public T getAnnotation() {
return annotation;
}
/**
* Get the {@link AccessStrategy} used by this {@link ConstraintValidation}.
*
* @return {@link AccessStrategy}
*/
public AccessStrategy getAccess() {
return access;
}
/**
* Override the Annotation set at construction.
*
* @param annotation
*/
public void setAnnotation(T annotation) {
this.annotation = annotation;
}
// ///////////////////////// ConstraintDescriptor implementation
/**
* {@inheritDoc}
*/
public Map getAttributes() {
return attributes;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public Set> getComposingConstraints() {
return composedConstraints == null ? Collections.EMPTY_SET : composedConstraints;
}
/**
* Get the composing {@link ConstraintValidation} objects. This is
* effectively an implementation-specific analogue to
* {@link #getComposingConstraints()}.
*
* @return {@link Set} of {@link ConstraintValidation}
*/
@SuppressWarnings("unchecked")
Set> getComposingValidations() {
return composedConstraints == null ? Collections.EMPTY_SET : composedConstraints;
}
/**
* {@inheritDoc}
*/
public Set> getGroups() {
return groups;
}
/**
* {@inheritDoc}
*/
public Set> getPayload() {
return payload;
}
/**
* {@inheritDoc}
*/
public List>> getConstraintValidatorClasses() {
if (validatorClasses == null) {
return Collections.emptyList();
}
return Arrays.asList(validatorClasses);
}
}