/*
* 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 com.facebook.presto.raptor.util;
import com.google.inject.Binder;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.Scopes;
import com.google.inject.TypeLiteral;
import org.skife.jdbi.v2.DBI;
import org.skife.jdbi.v2.IDBI;
import org.skife.jdbi.v2.tweak.ResultSetMapper;
import javax.inject.Inject;
import javax.sql.DataSource;
import java.lang.annotation.Annotation;
import java.util.Set;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.inject.multibindings.Multibinder.newSetBinder;
public class DbiProvider
implements Provider<IDBI>
{
private final Class<? extends Annotation> annotationType;
private Injector injector;
public DbiProvider(Class<? extends Annotation> annotationType)
{
this.annotationType = checkNotNull(annotationType, "annotationType is null");
}
@Inject
public void setInjector(Injector injector)
{
this.injector = checkNotNull(injector, "injector is null");
}
@Override
public IDBI get()
{
checkState(injector != null, "injector was not set");
DBI dbi = new DBI(injector.getInstance(Key.get(DataSource.class, annotationType)));
Key<Set<ResultSetMapper<?>>> mappersKey = Key.get(new TypeLiteral<Set<ResultSetMapper<?>>>() {}, annotationType);
if (injector.getExistingBinding(mappersKey) != null) {
for (ResultSetMapper<?> mapper : injector.getInstance(mappersKey)) {
dbi.registerMapper(mapper);
}
}
return dbi;
}
public static void bindDbiToDataSource(Binder bind, Class<? extends Annotation> annotationType)
{
bind.bind(IDBI.class).annotatedWith(annotationType).toProvider(new DbiProvider(annotationType)).in(Scopes.SINGLETON);
}
public static void bindResultSetMapper(Binder binder, Class<? extends ResultSetMapper<?>> mapper, Class<? extends Annotation> annotation)
{
newSetBinder(binder, new TypeLiteral<ResultSetMapper<?>>() {}, annotation)
.addBinding().to(mapper).in(Scopes.SINGLETON);
}
}