/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
*/
package org.hibernate.validator.internal.engine.valuehandling;
import java.lang.reflect.Type;
import com.fasterxml.classmate.ResolvedType;
import com.fasterxml.classmate.TypeResolver;
import org.hibernate.validator.internal.util.TypeResolutionHelper;
import org.hibernate.validator.spi.valuehandling.ValidatedValueUnwrapper;
/**
* Base class for {@link ValidatedValueUnwrapper}s based on ClassMate's type resolver.
*
* @author Gunnar Morling
*/
public abstract class TypeResolverBasedValueUnwrapper<T> extends ValidatedValueUnwrapper<T> {
private final Class<?> clazz;
private final TypeResolver typeResolver;
TypeResolverBasedValueUnwrapper(TypeResolutionHelper typeResolutionHelper) {
this.typeResolver = typeResolutionHelper.getTypeResolver();
clazz = resolveSingleTypeParameter( typeResolver, this.getClass(), ValidatedValueUnwrapper.class );
}
@Override
public Type getValidatedValueType(Type valueType) {
return resolveSingleTypeParameter( typeResolver, valueType, clazz );
}
/**
* Resolves the single type parameter of the given target class, using the given sub-type.
*/
private static Class<?> resolveSingleTypeParameter(TypeResolver typeResolver, Type subType, Class<?> target) {
ResolvedType resolvedType = typeResolver.resolve( subType );
return resolvedType.typeParametersFor( target ).get( 0 ).getErasedType();
}
}