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Palantir open source project
/*
* (c) Copyright 2019 Palantir Technologies Inc. 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.palantir.javaformat;
import static java.util.Comparator.comparing;
import com.google.common.collect.Iterators;
import com.google.common.collect.Range;
import com.google.common.collect.RangeSet;
import com.google.common.collect.TreeRangeSet;
import com.palantir.javaformat.java.Replacement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public final class Utils {
private Utils() {}
public static String applyReplacements(String input, Collection replacementsCollection) {
List replacements = new ArrayList<>(replacementsCollection);
replacements.sort(comparing((Replacement r) -> r.getReplaceRange().lowerEndpoint())
.reversed());
StringBuilder writer = new StringBuilder(input);
for (Replacement replacement : replacements) {
writer.replace(
replacement.getReplaceRange().lowerEndpoint(),
replacement.getReplaceRange().upperEndpoint(),
replacement.getReplacementString());
}
return writer.toString();
}
/** Converts zero-indexed, [closed, open) line ranges in the given source file to character ranges. */
public static RangeSet lineRangesToCharRanges(String input, RangeSet lineRanges) {
List lines = new ArrayList<>();
Iterators.addAll(lines, Newlines.lineOffsetIterator(input));
lines.add(input.length() + 1);
final RangeSet characterRanges = TreeRangeSet.create();
for (Range lineRange :
lineRanges.subRangeSet(Range.closedOpen(0, lines.size() - 1)).asRanges()) {
int lineStart = lines.get(lineRange.lowerEndpoint());
// Exclude the trailing newline. This isn't strictly necessary, but handling blank lines
// as empty ranges is convenient.
int lineEnd = lines.get(lineRange.upperEndpoint()) - 1;
Range range = Range.closedOpen(lineStart, lineEnd);
characterRanges.add(range);
}
return characterRanges;
}
}
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