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HV-878 Extracting common base class for unwrappers using ClassMate
* Also using shared instance of TypeResolver * Moving unwrappers to "internal" package
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54 changes: 54 additions & 0 deletions
54
...rg/hibernate/validator/internal/engine/valuehandling/TypeResolverBasedValueUnwrapper.java
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/* | ||
* JBoss, Home of Professional Open Source | ||
* Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual contributors | ||
* by the @authors tag. See the copyright.txt in the distribution for a | ||
* full listing of individual contributors. | ||
* | ||
* Licensed 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.hibernate.validator.internal.engine.valuehandling; | ||
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import java.lang.reflect.Type; | ||
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import com.fasterxml.classmate.ResolvedType; | ||
import com.fasterxml.classmate.TypeResolver; | ||
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import org.hibernate.validator.internal.util.TypeResolutionHelper; | ||
import org.hibernate.validator.spi.valuehandling.ValidatedValueUnwrapper; | ||
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/** | ||
* Base class for {@link ValidatedValueUnwrapper}s based on ClassMate's type resolver. | ||
* | ||
* @author Gunnar Morling | ||
*/ | ||
public abstract class TypeResolverBasedValueUnwrapper<T> extends ValidatedValueUnwrapper<T> { | ||
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private final Class<?> clazz; | ||
private final TypeResolver typeResolver; | ||
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TypeResolverBasedValueUnwrapper(TypeResolutionHelper typeResolutionHelper) { | ||
this.typeResolver = typeResolutionHelper.getTypeResolver(); | ||
clazz = resolveSingleTypeParameter( typeResolver, this.getClass(), ValidatedValueUnwrapper.class ); | ||
} | ||
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@Override | ||
public Type getValidatedValueType(Type valueType) { | ||
return resolveSingleTypeParameter( typeResolver, valueType, clazz ); | ||
} | ||
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/** | ||
* 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(); | ||
} | ||
} |
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