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Diffstat (limited to 'src/main/java/com/google/devtools/build/lib/query2/engine/MinDepthUniquifier.java')
| -rw-r--r-- | src/main/java/com/google/devtools/build/lib/query2/engine/MinDepthUniquifier.java | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/query2/engine/MinDepthUniquifier.java b/src/main/java/com/google/devtools/build/lib/query2/engine/MinDepthUniquifier.java new file mode 100644 index 0000000000..86170047fd --- /dev/null +++ b/src/main/java/com/google/devtools/build/lib/query2/engine/MinDepthUniquifier.java @@ -0,0 +1,29 @@ +// Copyright 2017 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.engine; + +import com.google.common.collect.ImmutableList; + +/** + * A helper for deduping values that have already been seen at certain "depths". + * + * <p>This is similar to {@link Uniquifier}. + */ +public interface MinDepthUniquifier<T> { + /** + * Returns the subset of {@code newElements} that haven't been seen before at depths less than or + * equal to {@code depth} + */ + ImmutableList<T> uniqueAtDepthLessThanOrEqualTo(Iterable<T> newElements, int depth); +} |