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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.query2.output;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.query2.engine.DigraphQueryEvalResult;
import com.google.devtools.build.lib.query2.engine.OutputFormatterCallback;
import com.google.devtools.build.lib.query2.engine.QueryEvalResult;
import com.google.devtools.build.lib.query2.output.OutputFormatter.StreamedFormatter;
import com.google.devtools.build.lib.query2.output.QueryOptions.OrderOutput;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Set;
/** Static utility methods for outputting a query. */
public class QueryOutputUtils {
// Utility class cannot be instantiated.
private QueryOutputUtils() {}
public static boolean shouldStreamResults(QueryOptions queryOptions, OutputFormatter formatter) {
return queryOptions.orderOutput == OrderOutput.NO
&& formatter instanceof StreamedFormatter;
}
public static void output(QueryOptions queryOptions, QueryEvalResult result,
Set<Target> targetsResult, OutputFormatter formatter, PrintStream outputStream,
AspectResolver aspectResolver)
throws IOException, InterruptedException {
/*
* This is not really streaming, but we are using the streaming interface for writing into the
* output everything in one batch. This happens when the QueryEnvironment does not
* support streaming but we don't care about ordered results.
*/
boolean orderedResults = !shouldStreamResults(queryOptions, formatter);
if (orderedResults) {
formatter.output(queryOptions,
((DigraphQueryEvalResult<Target>) result).getGraph().extractSubgraph(targetsResult),
outputStream, aspectResolver);
} else {
OutputFormatterCallback.processAllTargets(((StreamedFormatter) formatter)
.createStreamCallback(queryOptions, outputStream, aspectResolver), targetsResult);
}
}
}
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