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ParameterMetaData.java
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ParameterMetaData.java
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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 <http://www.apache.org/licenses/LICENSE-2.0>.
*/
package org.hibernate.validator.internal.metadata.aggregated;
import java.lang.annotation.ElementType;
import java.lang.reflect.Executable;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Set;
import javax.validation.ElementKind;
import javax.validation.metadata.ParameterDescriptor;
import org.hibernate.validator.internal.engine.path.PathImpl;
import org.hibernate.validator.internal.engine.valueextraction.ValueExtractorManager;
import org.hibernate.validator.internal.metadata.core.ConstraintHelper;
import org.hibernate.validator.internal.metadata.core.MetaConstraint;
import org.hibernate.validator.internal.metadata.descriptor.ParameterDescriptorImpl;
import org.hibernate.validator.internal.metadata.facets.Cascadable;
import org.hibernate.validator.internal.metadata.raw.ConstrainedElement;
import org.hibernate.validator.internal.metadata.raw.ConstrainedElement.ConstrainedElementKind;
import org.hibernate.validator.internal.metadata.raw.ConstrainedParameter;
import org.hibernate.validator.internal.util.ExecutableParameterNameProvider;
import org.hibernate.validator.internal.util.TypeResolutionHelper;
/**
* An aggregated view of the constraint related meta data for a single method
* parameter.
*
* @author Gunnar Morling
* @author Hardy Ferentschik
*/
public class ParameterMetaData extends AbstractConstraintMetaData implements Cascadable {
private final int index;
private final CascadingMetaData cascadingMetaData;
private ParameterMetaData(int index,
String name,
Type type,
Set<MetaConstraint<?>> constraints,
Set<MetaConstraint<?>> containerElementsConstraints,
CascadingMetaData cascadingMetaData) {
super(
name,
type,
constraints,
containerElementsConstraints,
cascadingMetaData.isMarkedForCascadingOnAnnotatedObjectOrContainerElements(),
!constraints.isEmpty() || !containerElementsConstraints.isEmpty() || cascadingMetaData.isMarkedForCascadingOnAnnotatedObjectOrContainerElements()
);
this.index = index;
this.cascadingMetaData = cascadingMetaData;
}
public int getIndex() {
return index;
}
@Override
public ElementType getElementType() {
return ElementType.PARAMETER;
}
@Override
public ParameterDescriptor asDescriptor(boolean defaultGroupSequenceRedefined, List<Class<?>> defaultGroupSequence) {
return new ParameterDescriptorImpl(
getType(),
index,
getName(),
asDescriptors( getDirectConstraints() ),
asContainerElementTypeDescriptors( getContainerElementsConstraints(), cascadingMetaData, defaultGroupSequenceRedefined, defaultGroupSequence ),
cascadingMetaData.isCascading(),
defaultGroupSequenceRedefined,
defaultGroupSequence,
cascadingMetaData.getGroupConversionDescriptors()
);
}
@Override
public Object getValue(Object parent) {
return ( (Object[]) parent )[getIndex()];
}
@Override
public Type getCascadableType() {
return getType();
}
@Override
public void appendTo(PathImpl path) {
path.addParameterNode( getName(), getIndex() );
}
@Override
public CascadingMetaData getCascadingMetaData() {
return cascadingMetaData;
}
@Override
public ElementKind getKind() {
return ElementKind.PARAMETER;
}
public static class Builder extends MetaDataBuilder {
private final ExecutableParameterNameProvider parameterNameProvider;
private final Type parameterType;
private final int parameterIndex;
private Executable executableForNameRetrieval;
private CascadingMetaDataBuilder cascadingMetaDataBuilder;
public Builder(Class<?> beanClass,
ConstrainedParameter constrainedParameter,
ConstraintHelper constraintHelper,
TypeResolutionHelper typeResolutionHelper,
ValueExtractorManager valueExtractorManager,
ExecutableParameterNameProvider parameterNameProvider) {
super( beanClass, constraintHelper, typeResolutionHelper, valueExtractorManager );
this.parameterNameProvider = parameterNameProvider;
this.parameterType = constrainedParameter.getType();
this.parameterIndex = constrainedParameter.getIndex();
add( constrainedParameter );
}
@Override
public boolean accepts(ConstrainedElement constrainedElement) {
if ( constrainedElement.getKind() != ConstrainedElementKind.PARAMETER ) {
return false;
}
return ( (ConstrainedParameter) constrainedElement ).getIndex() == parameterIndex;
}
@Override
public void add(ConstrainedElement constrainedElement) {
super.add( constrainedElement );
ConstrainedParameter newConstrainedParameter = (ConstrainedParameter) constrainedElement;
if ( cascadingMetaDataBuilder == null ) {
cascadingMetaDataBuilder = newConstrainedParameter.getCascadingMetaDataBuilder();
}
else {
cascadingMetaDataBuilder = cascadingMetaDataBuilder.merge( newConstrainedParameter.getCascadingMetaDataBuilder() );
}
// If the current parameter is from a method hosted on a parent class,
// use this parent class parameter name instead of the more specific one.
// Worse case, we are consistent, best case parameters from parents are more meaningful.
// See HV-887 and the associated unit test
if ( executableForNameRetrieval == null ||
newConstrainedParameter.getExecutable().getDeclaringClass().isAssignableFrom( executableForNameRetrieval.getDeclaringClass() ) ) {
executableForNameRetrieval = newConstrainedParameter.getExecutable();
}
}
@Override
public ParameterMetaData build() {
return new ParameterMetaData(
parameterIndex,
parameterNameProvider.getParameterNames( executableForNameRetrieval ).get( parameterIndex ),
parameterType,
adaptOriginsAndImplicitGroups( getDirectConstraints() ),
adaptOriginsAndImplicitGroups( getContainerElementConstraints() ),
cascadingMetaDataBuilder.build( valueExtractorManager, executableForNameRetrieval )
);
}
}
}