org.hibernate.validator.internal.engine.DefaultParameterNameProvider Maven / Gradle / Ivy
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* Copyright 2012, 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;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.List;
import javax.validation.ParameterNameProvider;
import static org.hibernate.validator.internal.util.CollectionHelper.newArrayList;
/**
* A default {@link ParameterNameProvider} implementation which returns
* parameter names in the form {@code arg0}, {@code arg1} etc. as defined by the
* BV specification.
*
* @author Hardy Ferentschik
* @author Gunnar Morling
*/
public class DefaultParameterNameProvider implements ParameterNameProvider {
@Override
public List getParameterNames(Constructor constructor) {
return getParameterNames( constructor.getParameterTypes().length );
}
@Override
public List getParameterNames(Method method) {
return getParameterNames( method.getParameterTypes().length );
}
private List getParameterNames(int parameterCount) {
List parameterNames = newArrayList();
for ( int i = 0; i < parameterCount; i++ ) {
parameterNames.add( getPrefix() + i );
}
return parameterNames;
}
/**
* Returns the prefix to be used for parameter names. Defaults to {@code arg} as per
* the spec. Can be overridden to create customized name providers.
*
* @return The prefix to be used for parameter names.
*/
protected String getPrefix() {
return "arg";
}
}