io.questdb.griffin.engine.functions.metadata.BuildFunctionFactory Maven / Gradle / Ivy
/*******************************************************************************
* ___ _ ____ ____
* / _ \ _ _ ___ ___| |_| _ \| __ )
* | | | | | | |/ _ \/ __| __| | | | _ \
* | |_| | |_| | __/\__ \ |_| |_| | |_) |
* \__\_\\__,_|\___||___/\__|____/|____/
*
* Copyright (c) 2014-2019 Appsicle
* Copyright (c) 2019-2020 QuestDB
*
* 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.questdb.griffin.engine.functions.metadata;
import io.questdb.BuildInformation;
import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.StrFunction;
import io.questdb.griffin.engine.functions.constants.StrConstant;
import io.questdb.std.ObjList;
public class BuildFunctionFactory implements FunctionFactory {
private StrFunction instance;
@Override
public String getSignature() {
return "build()";
}
@Override
public Function newInstance(final ObjList args,
final int position,
final CairoConfiguration configuration,
final SqlExecutionContext sqlExecutionContext) {
if (instance == null) {
instance = createInstance(configuration);
}
return instance;
}
private StrFunction createInstance(final CairoConfiguration configuration) {
final BuildInformation buildInformation = configuration.getBuildInformation();
final CharSequence information = "Build Information: QuestDB " +
buildInformation.getQuestDbVersion() +
", JDK " +
buildInformation.getJdkVersion() +
", Commit Hash " +
buildInformation.getCommitHash();
return new StrConstant(0, information);
}
}