62 lines
2.1 KiB
Java
62 lines
2.1 KiB
Java
/*
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* Copyright (C) 2018 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.copybara;
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import com.google.common.base.Preconditions;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.ImmutableSet;
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import com.google.copybara.ChangeVisitable.ChangesVisitor;
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import com.google.copybara.ChangeVisitable.VisitResult;
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import com.google.copybara.util.Glob;
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import java.util.ArrayList;
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import java.util.List;
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/** A visitor that finds all the parents that match the origin glob. */
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public class BaselinesWithoutLabelVisitor<T> implements ChangesVisitor {
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private final List<T> result = new ArrayList<>();
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private final int limit;
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private final Glob originFiles;
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private boolean skipFirst;
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public BaselinesWithoutLabelVisitor(Glob originFiles, int limit, boolean skipFirst) {
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this.originFiles = Preconditions.checkNotNull(originFiles);
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Preconditions.checkArgument(limit > 0);
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this.limit = limit;
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this.skipFirst = skipFirst;
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}
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public ImmutableList<T> getResult() {
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return ImmutableList.copyOf(result);
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}
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@SuppressWarnings("unchecked")
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@Override
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public VisitResult visit(Change<? extends Revision> change) {
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if (skipFirst) {
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skipFirst = false;
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return VisitResult.CONTINUE;
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}
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ImmutableSet<String> files = change.getChangeFiles();
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if (Glob.affectsRoots(originFiles.roots(), files)) {
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result.add((T) change.getRevision());
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return result.size() < limit ? VisitResult.CONTINUE : VisitResult.TERMINATE;
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}
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// This change only contains files that are not exported
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return VisitResult.CONTINUE;
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}
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}
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