RegisterMessageMappers.java
/*
* 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.v3.annotations;
import net.morimekta.providence.descriptor.PField;
import net.morimekta.providence.descriptor.PMessageDescriptor;
import net.morimekta.providence.jdbi.v3.MessageRowMapper;
import org.jdbi.v3.sqlobject.customizer.SqlStatementCustomizer;
import org.jdbi.v3.sqlobject.customizer.SqlStatementCustomizerFactory;
import org.jdbi.v3.sqlobject.customizer.SqlStatementCustomizingAnnotation;
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.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import static net.morimekta.providence.jdbi.v3.annotations.RegisterMessageMapper.Factory.getDescriptor;
import static net.morimekta.providence.jdbi.v3.annotations.RegisterMessageMapper.Factory.makeFieldMap;
@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE})
@SqlStatementCustomizingAnnotation(RegisterMessageMappers.Factory.class)
public @interface RegisterMessageMappers {
RegisterMessageMapper[] value();
class Factory implements SqlStatementCustomizerFactory {
@Override
@SuppressWarnings("unchecked")
public SqlStatementCustomizer createForType(Annotation annotation, Class<?> sqlObjectType) {
RegisterMessageMappers registers = (RegisterMessageMappers) annotation;
Map<Type, MessageRowMapper> mappers = new HashMap<>();
for (RegisterMessageMapper register : registers.value()) {
if (register.value().isInterface()) {
throw new IllegalArgumentException("Interfaces cannot be used as message return types");
}
PMessageDescriptor descriptor = getDescriptor(register);
Map<String, PField> fieldMap = makeFieldMap(descriptor, register);
MessageRowMapper mapper = new MessageRowMapper(descriptor, fieldMap);
mappers.put(register.value(), mapper);
}
return stmt -> mappers.forEach(stmt::registerRowMapper);
}
@Override
public SqlStatementCustomizer createForMethod(Annotation annotation, Class<?> sqlObjectType, Method method) {
return createForType(annotation, sqlObjectType);
}
}
}