org.hibernate.validator.internal.engine.DefaultParameterNameProvider Maven / Gradle / Ivy

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JPMS Module-Info's for a few of the Jakarta Libraries. These will be removed as time goes by

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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.internal.engine;

import java.lang.reflect.Constructor;
import java.lang.reflect.Executable;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import jakarta.validation.ParameterNameProvider;

/**
 * A default {@link ParameterNameProvider} implementation which returns parameter names obtained from the Java
 * reflection API as mandated by the BV specification.
 *
 * @author Hardy Ferentschik
 * @author Gunnar Morling
 */
public class DefaultParameterNameProvider implements ParameterNameProvider {

	@Override
	public List getParameterNames(Constructor constructor) {
		return doGetParameterNames( constructor );
	}

	@Override
	public List getParameterNames(Method method) {
		return doGetParameterNames( method );
	}

	private List doGetParameterNames(Executable executable) {
		Parameter[] parameters = executable.getParameters();
		List parameterNames = new ArrayList<>( parameters.length );

		for ( Parameter parameter : parameters ) {
			parameterNames.add( parameter.getName() );
		}

		return Collections.unmodifiableList( parameterNames );
	}
}