/*
 * 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.jdbi.v3.sqlobject.customizer;

import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;

import java.lang.reflect.Type;
import org.jdbi.v3.core.statement.StatementContext;
import org.jdbi.v3.sqlobject.internal.ParameterUtil;

/**
 * Defines a named attribute as the argument passed to the annotated parameter. Attributes are stored on the
 * {@link StatementContext}, and may be used by statement customizers such as the statement rewriter.
 */
@SqlStatementCustomizingAnnotation(Define.Factory.class)
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface Define
{
    /**
     * The attribute name to define. If omitted, the name of the annotated parameter is used. It is an error to omit
     * the name when there is no parameter naming information in your class files.
     *
     * @return the attribute name.
     */
    String value() default "";

    class Factory implements SqlStatementCustomizerFactory
    {
        @Override
        public SqlStatementParameterCustomizer createForParameter(Annotation annotation,
                                                                  Class<?> sqlObjectType,
                                                                  Method method,
                                                                  Parameter param,
                                                                  int index,
                                                                  Type type)
        {
            Define define = (Define) annotation;

            final String name = ParameterUtil.getParameterName(define, define.value(), param);
            return (stmt, arg) -> stmt.define(name, arg);
        }
    }
}