diff options
Diffstat (limited to 'src/main/java/com/google/devtools/build/lib/collect/nestedset/ManyDirectOneTransitiveNestedSet.java')
-rw-r--r-- | src/main/java/com/google/devtools/build/lib/collect/nestedset/ManyDirectOneTransitiveNestedSet.java | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/collect/nestedset/ManyDirectOneTransitiveNestedSet.java b/src/main/java/com/google/devtools/build/lib/collect/nestedset/ManyDirectOneTransitiveNestedSet.java new file mode 100644 index 0000000000..cdb4f04b1a --- /dev/null +++ b/src/main/java/com/google/devtools/build/lib/collect/nestedset/ManyDirectOneTransitiveNestedSet.java @@ -0,0 +1,63 @@ +// Copyright 2014 Google 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.google.devtools.build.lib.collect.nestedset; + +import java.util.Arrays; +import java.util.Objects; + +import javax.annotation.Nullable; + +/** + * Memory-efficient implementation for the case where we have many direct elements and one + * transitive NestedSet. + */ +abstract class ManyDirectOneTransitiveNestedSet<E> extends MemoizedUniquefierNestedSet<E> { + + private final Object[] directs; + private final NestedSet<E> transitive; + private Object memo; + + public ManyDirectOneTransitiveNestedSet(Object[] directs, NestedSet<E> transitive) { + this.directs = directs; + this.transitive = transitive; + } + + @Override + Object getMemo() { return memo; } + + @Override + void setMemo(Object memo) { this.memo = memo; } + + @Override + Object[] directMembers() { return directs; } + + @Override + NestedSet[] transitiveSets() { return new NestedSet[]{transitive}; } + + @Override + public boolean shallowEquals(@Nullable NestedSet<? extends E> other) { + if (this == other) { + return true; + } + return other != null + && getOrder().equals(other.getOrder()) + && other instanceof ManyDirectOneTransitiveNestedSet + && Arrays.equals(directs, ((ManyDirectOneTransitiveNestedSet) other).directs) + && transitive == ((ManyDirectOneTransitiveNestedSet) other).transitive; + } + + @Override + public int shallowHashCode() { + return Objects.hash(getOrder(), Arrays.hashCode(directs), transitive); } +} |