Support for handling TreeArtifact metadata and returning TreeArtifacts from ArtifactFunction.
--
MOS_MIGRATED_REVID=114174899
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/TreeArtifactValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/TreeArtifactValue.java
new file mode 100644
index 0000000..043edc2
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/TreeArtifactValue.java
@@ -0,0 +1,163 @@
+// Copyright 2016 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.skyframe;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import com.google.devtools.build.lib.actions.ActionInputHelper;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.actions.ArtifactFile;
+import com.google.devtools.build.lib.actions.cache.Digest;
+import com.google.devtools.build.lib.actions.cache.Metadata;
+import com.google.devtools.build.lib.vfs.PathFragment;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Set;
+
+import javax.annotation.Nullable;
+
+/**
+ * Value for TreeArtifacts, which contains a digest and the {@link FileArtifactValue}s
+ * of its child {@link ArtifactFile}s.
+ */
+public class TreeArtifactValue extends ArtifactValue {
+ private final byte[] digest;
+ private final Map<PathFragment, FileArtifactValue> childData;
+
+ private TreeArtifactValue(byte[] digest, Map<PathFragment, FileArtifactValue> childData) {
+ this.digest = digest;
+ this.childData = ImmutableMap.copyOf(childData);
+ }
+
+ /**
+ * Returns a TreeArtifactValue out of the given Artifact-relative path fragments
+ * and their corresponding FileArtifactValues.
+ */
+ @VisibleForTesting
+ public static TreeArtifactValue create(Map<PathFragment, FileArtifactValue> childFileValues) {
+ Map<String, Metadata> digestBuilder =
+ Maps.newHashMapWithExpectedSize(childFileValues.size());
+ for (Map.Entry<PathFragment, FileArtifactValue> e : childFileValues.entrySet()) {
+ digestBuilder.put(e.getKey().getPathString(), new Metadata(e.getValue().getDigest()));
+ }
+
+ return new TreeArtifactValue(
+ Digest.fromMetadata(digestBuilder).asMetadata().digest,
+ ImmutableMap.copyOf(childFileValues));
+ }
+
+ public FileArtifactValue getSelfData() {
+ return FileArtifactValue.createProxy(digest);
+ }
+
+ /** Returns the inputs that this artifact expands to, in no particular order. */
+ Iterable<ArtifactFile> getChildren(final Artifact base) {
+ return ActionInputHelper.asArtifactFiles(base, childData.keySet());
+ }
+
+ public Metadata getMetadata() {
+ return new Metadata(digest.clone());
+ }
+
+ public Set<PathFragment> getChildPaths() {
+ return childData.keySet();
+ }
+
+ @Nullable
+ public byte[] getDigest() {
+ return digest.clone();
+ }
+
+ @Override
+ public int hashCode() {
+ return Arrays.hashCode(digest);
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ if (this == other) {
+ return true;
+ }
+
+ if (!(other instanceof TreeArtifactValue)) {
+ return false;
+ }
+
+ TreeArtifactValue that = (TreeArtifactValue) other;
+ if (that.digest != digest) {
+ return false;
+ }
+
+ return childData.equals(that.childData);
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(TreeArtifactValue.class)
+ .add("digest", digest)
+ .add("childData", childData)
+ .toString();
+ }
+
+ /**
+ * A TreeArtifactValue that represents a missing TreeArtifact.
+ * This is occasionally useful because Java's concurrent collections disallow null members.
+ */
+ static final TreeArtifactValue MISSING_TREE_ARTIFACT = new TreeArtifactValue(null,
+ ImmutableMap.<PathFragment, FileArtifactValue>of()) {
+ @Override
+ public FileArtifactValue getSelfData() {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ Iterable<ArtifactFile> getChildren(Artifact base) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Metadata getMetadata() {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Set<PathFragment> getChildPaths() {
+ throw new UnsupportedOperationException();
+ }
+
+ @Nullable
+ @Override
+ public byte[] getDigest() {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public int hashCode() {
+ return 24; // my favorite number
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ return this == other;
+ }
+
+ @Override
+ public String toString() {
+ return "MISSING_TREE_ARTIFACT";
+ }
+ };
+}
