io.trino.sql.planner.planprinter.ValuePrinter 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 io.trino.sql.planner.planprinter;
import io.airlift.slice.Slice;
import io.trino.Session;
import io.trino.metadata.FunctionManager;
import io.trino.metadata.Metadata;
import io.trino.metadata.OperatorNotFoundException;
import io.trino.metadata.ResolvedFunction;
import io.trino.spi.type.Type;
import io.trino.sql.InterpretedFunctionInvoker;
import static io.trino.spi.type.VarcharType.VARCHAR;
import static java.util.Objects.requireNonNull;
public final class ValuePrinter
{
private final Metadata metadata;
private final FunctionManager functionManager;
private final Session session;
public ValuePrinter(Metadata metadata, FunctionManager functionManager, Session session)
{
this.metadata = requireNonNull(metadata, "metadata is null");
this.functionManager = requireNonNull(functionManager, "functionManager is null");
this.session = requireNonNull(session, "session is null");
}
public String castToVarchar(Type type, Object value)
{
try {
return castToVarcharOrFail(type, value);
}
catch (OperatorNotFoundException e) {
return "";
}
}
public String castToVarcharOrFail(Type type, Object value)
throws OperatorNotFoundException
{
if (value == null) {
return "NULL";
}
ResolvedFunction coercion = metadata.getCoercion(type, VARCHAR);
Slice coerced = (Slice) new InterpretedFunctionInvoker(functionManager).invoke(coercion, session.toConnectorSession(), value);
return coerced.toStringUtf8();
}
}