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/*
 * Hibernate Validator, declare and validate application constraints
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or .
 */
package org.hibernate.validator;

import java.util.Set;

import javax.validation.Configuration;
import javax.validation.valueextraction.ValueExtractor;

import org.hibernate.validator.cfg.ConstraintMapping;
import org.hibernate.validator.spi.resourceloading.ResourceBundleLocator;

/**
 * Uniquely identifies Hibernate Validator in the Bean Validation bootstrap
 * strategy. Also contains Hibernate Validator specific configurations.
 *
 * @author Emmanuel Bernard
 * @author Gunnar Morling
 * @author Kevin Pollet <[email protected]> (C) 2011 SERLI
 * @author Hardy Ferentschik
 * @author Chris Beckey <[email protected]>
 */
public interface HibernateValidatorConfiguration extends Configuration {
	/**
	 * Property corresponding to the {@link #failFast} method.
	 * Accepts {@code true} or {@code false}. Defaults to {@code false}.
	 */
	String FAIL_FAST = "hibernate.validator.fail_fast";

	/**
	 * Property corresponding to the {@link #allowOverridingMethodAlterParameterConstraint} method.
	 * Accepts {@code true} or {@code false}.
	 * Defaults to {@code false}.
	 */
	String ALLOW_PARAMETER_CONSTRAINT_OVERRIDE = "hibernate.validator.allow_parameter_constraint_override";

	/**
	 * Property corresponding to the {@link #allowMultipleCascadedValidationOnReturnValues} method.
	 * Accepts {@code true} or {@code false}.
	 * Defaults to {@code false}.
	 */
	String ALLOW_MULTIPLE_CASCADED_VALIDATION_ON_RESULT = "hibernate.validator.allow_multiple_cascaded_validation_on_result";

	/**
	 * Property corresponding to the {@link #allowParallelMethodsDefineParameterConstraints} method.
	 * Accepts {@code true} or {@code false}.
	 * Defaults to {@code false}.
	 */
	String ALLOW_PARALLEL_METHODS_DEFINE_PARAMETER_CONSTRAINTS = "hibernate.validator.allow_parallel_method_parameter_constraint";

	/**
	 * Property for configuring a constraint mapping contributor, allowing to set up one or more constraint mappings for
	 * the default validator factory. Accepts a String with the comma separated fully-qualified class names of one or more
	 * {@link org.hibernate.validator.spi.cfg.ConstraintMappingContributor} implementations.
	 *
	 * @since 5.3
	 */
	String CONSTRAINT_MAPPING_CONTRIBUTORS = "hibernate.validator.constraint_mapping_contributors";

	/**
	 * 
	 * Returns the {@link ResourceBundleLocator} used by the
	 * {@link Configuration#getDefaultMessageInterpolator() default message
	 * interpolator} to load user-provided resource bundles. In conformance with
	 * the specification this default locator retrieves the bundle
	 * "ValidationMessages".
	 * 
	 * 
	 * This locator can be used as delegate for custom locators when setting a
	 * customized {@link org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator}:
	 * 
	 * 	 * {@code
	 * 	HibernateValidatorConfiguration configure =
	 *    Validation.byProvider(HibernateValidator.class).configure();
	 *
	 *  ResourceBundleLocator defaultResourceBundleLocator =
	 *    configure.getDefaultBundleLocator();
	 *  ResourceBundleLocator myResourceBundleLocator =
	 *    new MyResourceBundleLocator(defaultResourceBundleLocator);
	 *
	 *  configure.messageInterpolator(
	 *    new ResourceBundleMessageInterpolator(myResourceBundleLocator));
	 * }
	 * 
	 *
	 * @return The default {@link ResourceBundleLocator}. Never null.
	 */
	ResourceBundleLocator getDefaultResourceBundleLocator();

	/**
	 * Creates a new constraint mapping which can be used to programmatically configure the constraints for given types. After
	 * the mapping has been set up, it must be added to this configuration via {@link #addMapping(ConstraintMapping)}.
	 *
	 * @return A new constraint mapping.
	 */
	ConstraintMapping createConstraintMapping();

	/**
	 * Returns the default {@link ValueExtractor} implementations as per the
	 * specification.
	 *
	 * @return the default {@code ValueExtractor} implementations compliant
	 * with the specification
	 *
	 * @since 6.0
	 */
	@Incubating
	Set> getDefaultValueExtractors();

	/**
	 * Adds the specified {@link ConstraintMapping} instance to the configuration. Constraints configured in {@code mapping}
	 * will be added to the constraints configured via annotations and/or xml.
	 *
	 * @param mapping {@code ConstraintMapping} instance containing programmatic configured constraints
	 *
	 * @return {@code this} following the chaining method pattern
	 *
	 * @throws IllegalArgumentException if {@code mapping} is {@code null}
	 */
	HibernateValidatorConfiguration addMapping(ConstraintMapping mapping);

	/**
	 * En- or disables the fail fast mode. When fail fast is enabled the validation
	 * will stop on the first constraint violation detected.
	 *
	 * @param failFast {@code true} to enable fail fast, {@code false} otherwise.
	 *
	 * @return {@code this} following the chaining method pattern
	 */
	HibernateValidatorConfiguration failFast(boolean failFast);

	/**
	 * Sets the class loader to be used for loading user-provided resources:
	 * 
	 * XML descriptors ({@code META-INF/validation.xml} as well as XML constraint mappings)
	 * classes specified by name in XML descriptors (e.g. custom message interpolators etc.)
	 * the {@code ValidationMessages} resource bundle
	 * 
	 * If no class loader is given, these resources will be obtained through the thread context class loader and as a
	 * last fallback through Hibernate Validator's own class loader.
	 *
	 * @param externalClassLoader The class loader for loading user-provided resources.
	 *
	 * @return {@code this} following the chaining method pattern
	 *
	 * @since 5.2
	 */
	HibernateValidatorConfiguration externalClassLoader(ClassLoader externalClassLoader);

	/**
	 * Define whether overriding methods that override constraints should throw a {@code ConstraintDefinitionException}.
	 * The default value is {@code false}, i.e. do not allow.
	 * 
	 * See Section 4.5.5 of the JSR 380 specification, specifically
	 * 
	 * "In sub types (be it sub classes/interfaces or interface implementations), no parameter constraints may
	 * be declared on overridden or implemented methods, nor may parameters be marked for cascaded validation.
	 * This would pose a strengthening of preconditions to be fulfilled by the caller."
	 * 
	 *
	 * @param allow flag determining whether validation will allow overriding to alter parameter constraints.
	 *
	 * @return {@code this} following the chaining method pattern
	 *
	 * @since 5.3
	 */
	HibernateValidatorConfiguration allowOverridingMethodAlterParameterConstraint(boolean allow);

	/**
	 * Define whether more than one constraint on a return value may be marked for cascading validation are allowed.
	 * The default value is {@code false}, i.e. do not allow.
	 * 
	 * See Section 4.5.5 of the JSR 380 specification, specifically
	 * 
	 * "One must not mark a method return value for cascaded validation more than once in a line of a class hierarchy.
	 * In other words, overriding methods on sub types (be it sub classes/interfaces or interface implementations)
	 * cannot mark the return value for cascaded validation if the return value has already been marked on the
	 * overridden method of the super type or interface."
	 * 
	 *
	 * @param allow flag determining whether validation will allow multiple cascaded validation on return values.
	 *
	 * @return {@code this} following the chaining method pattern
	 *
	 * @since 5.3
	 */
	HibernateValidatorConfiguration allowMultipleCascadedValidationOnReturnValues(boolean allow);

	/**
	 * Define whether parallel methods that define constraints should throw a {@code ConstraintDefinitionException}. The
	 * default value is {@code false}, i.e. do not allow.
	 * 
	 * See Section 4.5.5 of the JSR 380 specification, specifically
	 * 
	 * "If a sub type overrides/implements a method originally defined in several parallel types of the hierarchy
	 * (e.g. two interfaces not extending each other, or a class and an interface not implemented by said class),
	 * no parameter constraints may be declared for that method at all nor parameters be marked for cascaded validation.
	 * This again is to avoid an unexpected strengthening of preconditions to be fulfilled by the caller."
	 * 
	 *
	 * @param allow flag determining whether validation will allow parameter constraints in parallel hierarchies
	 *
	 * @return {@code this} following the chaining method pattern
	 *
	 * @since 5.3
	 */
	HibernateValidatorConfiguration allowParallelMethodsDefineParameterConstraints(boolean allow);
}