/
IncrementalCompilationHelper.java
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/
IncrementalCompilationHelper.java
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/*
* Hotspot compile command annotations - http://compile-command-annotations.nicoulaj.net
* Copyright © 2014-2019 Hotspot compile command annotations contributors
*
* 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 net.nicoulaj.compilecommand;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Set;
import java.util.TreeSet;
public class IncrementalCompilationHelper {
public static void mergeIncrementalFiles(File incrementalFiles, File outputFile) throws IOException {
if (incrementalFiles == null)
throw new NullPointerException("Input directory must not be null");
if (!incrementalFiles.isDirectory())
throw new FileNotFoundException("Directory for incrementalFiles '" + incrementalFiles + "' does not exist");
if (outputFile == null)
throw new NullPointerException("Output file must not be null");
PrintWriter pw = null;
try {
File[] files = incrementalFiles.listFiles();
if (files == null)
throw new IOException("Could not list files in input directory " + incrementalFiles);
Set<String> lines = new TreeSet<String>();
boolean quiet = false;
for (File file : files) {
quiet = processFile(lines, quiet, file);
}
pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(outputFile), "UTF-8"));
if (quiet) {
pw.println("quiet");
}
for (String line : lines) {
pw.println(line);
}
}
finally {
if (pw != null)
pw.close();
}
}
private static boolean processFile(Set<String> lines, boolean quiet, File file) throws IOException
{
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(file));
String l;
while ((l = br.readLine()) != null) {
if ("quiet".equals(l))
quiet = true;
else
lines.add(l);
}
}
finally {
if (br != null)
br.close();
}
return quiet;
}
}