org.jdbi.v3.sqlobject.GeneratorSqlObjectFactory Maven / Gradle / Ivy

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SqlObject is a declarative, annotation-driven API for database access. It complements the core API. Jdbi 3 is designed to provide convenient tabular data access in Java(tm) and other JVM based languages. It uses the Java collections framework for query results, provides a convenient means of externalizing SQL statements, and named parameter support for any database that supports JDBC.

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/*
 * 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;

import java.util.EnumSet;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import org.jdbi.v3.core.Jdbi;
import org.jdbi.v3.core.config.ConfigRegistry;
import org.jdbi.v3.core.extension.ExtensionMetadata;
import org.jdbi.v3.core.extension.Extensions;
import org.jdbi.v3.core.extension.HandleSupplier;
import org.jdbi.v3.core.internal.JdbiClassUtils;
import org.jdbi.v3.core.internal.JdbiClassUtils.MethodHandleHolder;
import org.jdbi.v3.core.internal.OnDemandExtensions;

import static java.lang.String.format;

import static org.jdbi.v3.core.extension.ExtensionFactory.FactoryFlag.DONT_USE_PROXY;

/**
 * Support for generator instances (concrete classes that have been created by the Jdbi generator).
 */
final class GeneratorSqlObjectFactory extends AbstractSqlObjectFactory implements OnDemandExtensions.Factory {

    private static final Class[] EXTENSION_TYPES = {ExtensionMetadata.class, HandleSupplier.class, ConfigRegistry.class};
    private static final Class[] ON_DEMAND_TYPES = {Jdbi.class};

    private final ConcurrentMap, MethodHandleHolder> attachedTypeCache = new ConcurrentHashMap<>();
    private final ConcurrentMap, MethodHandleHolder> onDemandTypeCache = new ConcurrentHashMap<>();

    GeneratorSqlObjectFactory() {}

    @Override
    public boolean accepts(Class extensionType) {
        return isConcrete(extensionType);
    }

    @Override
    public Set getFactoryFlags() {
        return EnumSet.of(DONT_USE_PROXY);
    }

    /**
     * Attach a sql object from a jdbi generator created class.
     *
     * @param extensionType  the type of sql object to create.
     * @param handleSupplier the Handle instance to attach this sql object to.
     * @return the new sql object bound to this handle.
     */
    @SuppressWarnings("unchecked")
    @Override
    public  E attach(Class extensionType, HandleSupplier handleSupplier) {
        if (!isConcrete(extensionType)) {
            throw new IllegalStateException(format("Can not process %s, not generated SQL object", extensionType.getSimpleName()));
        }

        ConfigRegistry config = handleSupplier.getConfig();

        final ExtensionMetadata extensionMetaData = config.get(Extensions.class).findMetadata(extensionType, this);
        final ConfigRegistry instanceConfig = extensionMetaData.createInstanceConfiguration(config);

        return (E) attachedTypeCache.computeIfAbsent(extensionType, GeneratorSqlObjectFactory::getGeneratedClass)
                .invoke(handle -> handle.invokeExact(extensionMetaData, handleSupplier, instanceConfig));
    }

    @Override
    public Optional