com.facebook.presto.jdbc.internal.spi.classloader.ClassLoaderSafeConnectorIndexResolver Maven / Gradle / Ivy
/*
* 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.jdbc.internal.spi.classloader;
import com.facebook.presto.jdbc.internal.spi.ConnectorColumnHandle;
import com.facebook.presto.jdbc.internal.spi.ConnectorIndexHandle;
import com.facebook.presto.jdbc.internal.spi.ConnectorIndexResolver;
import com.facebook.presto.jdbc.internal.spi.ConnectorResolvedIndex;
import com.facebook.presto.jdbc.internal.spi.ConnectorTableHandle;
import com.facebook.presto.jdbc.internal.spi.Index;
import com.facebook.presto.jdbc.internal.spi.TupleDomain;
import java.util.List;
import java.util.Set;
import static java.util.Objects.requireNonNull;
public class ClassLoaderSafeConnectorIndexResolver
implements ConnectorIndexResolver
{
private final ConnectorIndexResolver delegate;
private final ClassLoader classLoader;
public ClassLoaderSafeConnectorIndexResolver(ConnectorIndexResolver delegate, ClassLoader classLoader)
{
this.delegate = requireNonNull(delegate, "delegate is null");
this.classLoader = requireNonNull(classLoader, "classLoader is null");
}
@Override
public ConnectorResolvedIndex resolveIndex(ConnectorTableHandle tableHandle, Set indexableColumns, TupleDomain tupleDomain)
{
try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
return delegate.resolveIndex(tableHandle, indexableColumns, tupleDomain);
}
}
@Override
public Index getIndex(ConnectorIndexHandle indexHandle, List lookupSchema, List outputSchema)
{
try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
return delegate.getIndex(indexHandle, lookupSchema, outputSchema);
}
}
}