net.morimekta.providence.jdbi.v2.annotations.RegisterEnumValueMappers Maven / Gradle / Ivy

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Utilities for handling providence messages using jdbi v2.
There is a newer version: 2.7.0
/*
 * Copyright 2019 Providence Authors
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 net.morimekta.providence.jdbi.v2.annotations;

import net.morimekta.providence.PEnumValue;
import net.morimekta.providence.descriptor.PEnumDescriptor;
import net.morimekta.providence.jdbi.v2.EnumValueMapper;
import org.skife.jdbi.v2.Query;
import org.skife.jdbi.v2.ResultColumnMapperFactory;
import org.skife.jdbi.v2.StatementContext;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizer;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizerFactory;
import org.skife.jdbi.v2.sqlobject.SqlStatementCustomizingAnnotation;
import org.skife.jdbi.v2.tweak.ResultColumnMapper;

import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import static net.morimekta.providence.jdbi.v2.annotations.RegisterEnumValueMapper.Factory.getDescriptor;

@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE})
@SqlStatementCustomizingAnnotation(RegisterEnumValueMappers.Factory.class)
public @interface RegisterEnumValueMappers {
    RegisterEnumValueMapper[] value();

    class Factory implements SqlStatementCustomizerFactory {
       @Override
        public SqlStatementCustomizer createForType(Annotation annotation, Class sqlObjectType) {
           List          factories   = new ArrayList<>();
           PEnumDescriptor             descriptor;
           for (RegisterEnumValueMapper register : ((RegisterEnumValueMappers) annotation).value()) {
               for (Class> klass : register.value()) {
                   descriptor = getDescriptor(klass);
                   EnumValueMapper mapper = new EnumValueMapper<>(register.acceptUnknown(), descriptor);
                   factories.add(new ResultColumnMapperFactory() {
                       @Override
                       public boolean accepts(Class type, StatementContext ctx) {
                           return mapper.getType().equals(type);
                       }

                       @Override
                       public ResultColumnMapper columnMapperFor(Class type, StatementContext ctx) {
                           return mapper;
                       }
                   });
               }
           }
           return stmt -> {
               if (stmt instanceof Query) {
                   Query q = (Query) stmt;
                   for (ResultColumnMapperFactory factory : factories) {
                       q.registerColumnMapper(factory);
                   }
               }
           };
        }

        @Override
        public SqlStatementCustomizer createForMethod(Annotation annotation, Class sqlObjectType, Method method) {
            return createForType(annotation, sqlObjectType);
        }

        @Override
        public SqlStatementCustomizer createForParameter(Annotation annotation,
                                                         Class sqlObjectType,
                                                         Method method,
                                                         Object arg) {
            return stmt -> {};
        }
    }
}