Add a resource parsing action.

Part of 3 proposed new actions:
- parsing action
- merging action
- validating action

Dependencies (directData and transitiveData)
expect the symbol files. If the merge action
produces the symbol files, then each merge
action depends on each other. Instead, produce
it in an action with just source resources as
prereqs to allow more parallelism.

Technically, we don't need a manifest as part
of the parameters. I debated about whether
to introduce a basic version of
UnvalidatedAndroidData or not.

--
MOS_MIGRATED_REVID=128599714

1 files changed, 112 insertions, 0 deletions

diff --git a/src/tools/android/java/com/google/devtools/build/android/UnvalidatedAndroidDirectories.java b/src/tools/android/java/com/google/devtools/build/android/UnvalidatedAndroidDirectories.java
new file mode 100644
index 0000000000..f87da7fbf0
--- /dev/null
+++ b/src/tools/android/java/com/google/devtools/build/android/UnvalidatedAndroidDirectories.java
@@ -0,0 +1,112 @@
+// 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.android;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableList;
+import java.io.IOException;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+/**
+ * Android resource and asset directories that can be parsed.
+ */
+public class UnvalidatedAndroidDirectories {
+
+  private static final Pattern VALID_REGEX = Pattern.compile(".*:.*");
+
+  static String expectedFormat() {
+    return "resources[#resources]:assets[#assets]";
+  }
+
+  public static UnvalidatedAndroidDirectories valueOf(String text) {
+    return valueOf(text, FileSystems.getDefault());
+  }
+
+  @VisibleForTesting
+  static UnvalidatedAndroidDirectories valueOf(String text, FileSystem fileSystem) {
+    if (!VALID_REGEX.matcher(text).find()) {
+      throw new IllegalArgumentException(
+          text + " is not in the format '" + expectedFormat() + "'");
+    }
+    String[] parts = text.split(":");
+    return new UnvalidatedAndroidDirectories(
+        parts.length > 0 ? splitPaths(parts[0], fileSystem) : ImmutableList.<Path>of(),
+        parts.length > 1 ? splitPaths(parts[1], fileSystem) : ImmutableList.<Path>of());
+  }
+
+  protected static ImmutableList<Path> splitPaths(String pathsString, FileSystem fileSystem) {
+    if (pathsString.length() == 0) {
+      return ImmutableList.of();
+    }
+    ImmutableList.Builder<Path> paths = new ImmutableList.Builder<>();
+    for (String pathString : pathsString.split("#")) {
+      paths.add(exists(fileSystem.getPath(pathString)));
+    }
+    return paths.build();
+  }
+
+  protected static Path exists(Path path) {
+    if (!Files.exists(path)) {
+      throw new IllegalArgumentException(path + " does not exist");
+    }
+    return path;
+  }
+
+  protected final ImmutableList<Path> assetDirs;
+  protected final ImmutableList<Path> resourceDirs;
+
+  public UnvalidatedAndroidDirectories(
+      ImmutableList<Path> resourceDirs, ImmutableList<Path> assetDirs) {
+    this.resourceDirs = resourceDirs;
+    this.assetDirs = assetDirs;
+  }
+
+  void walk(final AndroidDataPathWalker pathWalker) throws IOException {
+    for (Path path : resourceDirs) {
+      pathWalker.walkResources(path);
+    }
+    for (Path path : assetDirs) {
+      pathWalker.walkAssets(path);
+    }
+  }
+
+  @Override
+  public String toString() {
+    return String.format("UnvalidatedAndroidDirectories(%s, %s)", resourceDirs, assetDirs);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(resourceDirs, assetDirs);
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (!(obj instanceof UnvalidatedAndroidDirectories)) {
+      return false;
+    }
+    UnvalidatedAndroidDirectories other = (UnvalidatedAndroidDirectories) obj;
+    return Objects.equals(other.resourceDirs, resourceDirs)
+        && Objects.equals(other.assetDirs, assetDirs);
+  }
+
+}