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NoRowsResultSet.java
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NoRowsResultSet.java
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/*
* Copyright 2022 Google LLC
*
* 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.google.cloud.spanner;
import com.google.spanner.v1.ResultSet;
import com.google.spanner.v1.ResultSetMetadata;
import com.google.spanner.v1.ResultSetStats;
import java.util.List;
import javax.annotation.Nullable;
class NoRowsResultSet extends AbstractResultSet<List<Object>> {
private final ResultSetStats stats;
private final ResultSetMetadata metadata;
NoRowsResultSet(ResultSet resultSet) {
this.stats = resultSet.getStats();
this.metadata = resultSet.getMetadata();
}
@Override
protected GrpcStruct currRow() {
throw SpannerExceptionFactory.newSpannerException(
ErrorCode.FAILED_PRECONDITION, "This result set has no rows");
}
@Override
public boolean next() throws SpannerException {
return false;
}
@Override
public void close() {}
@Nullable
@Override
public ResultSetStats getStats() {
return stats;
}
@Override
public ResultSetMetadata getMetadata() {
return metadata;
}
@Override
public Type getType() {
return Type.struct();
}
}