Add <resources> attribute processing to the Android resource processing toolchain.

--
PiperOrigin-RevId: 149963021
MOS_MIGRATED_REVID=149963021

1 files changed, 117 insertions, 0 deletions

diff --git a/src/tools/android/java/com/google/devtools/build/android/xml/ResourcesAttribute.java b/src/tools/android/java/com/google/devtools/build/android/xml/ResourcesAttribute.java
new file mode 100644
index 0000000000..b1d97407b8
--- /dev/null
+++ b/src/tools/android/java/com/google/devtools/build/android/xml/ResourcesAttribute.java
@@ -0,0 +1,117 @@
+// 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.android.xml;
+
+import com.google.common.base.Joiner;
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.Iterables;
+import com.google.devtools.build.android.AndroidDataWritingVisitor;
+import com.google.devtools.build.android.AndroidResourceClassWriter;
+import com.google.devtools.build.android.DataSource;
+import com.google.devtools.build.android.FullyQualifiedName;
+import com.google.devtools.build.android.XmlResourceValue;
+import com.google.devtools.build.android.XmlResourceValues;
+import com.google.devtools.build.android.proto.SerializeFormat;
+import com.google.devtools.build.android.proto.SerializeFormat.DataValueXml.Builder;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * An attribute associated with the root <resources> tag of an xml file in a values folder.
+ */
+public class ResourcesAttribute implements XmlResourceValue {
+
+  public static ResourcesAttribute of(String name, String value) {
+    return new ResourcesAttribute(name, value);
+  }
+
+  public static ResourcesAttribute from(SerializeFormat.DataValueXml proto) {
+    Map.Entry<String, String> attribute =
+        Iterables.getOnlyElement(proto.getAttributeMap().entrySet());
+    return of(attribute.getKey(), attribute.getValue());
+  }
+
+  private final String name;
+  private final String value;
+
+  private ResourcesAttribute(String name, String value) {
+    this.name = name;
+    this.value = value;
+  }
+
+  @Override
+  public void write(
+      FullyQualifiedName key, DataSource source, AndroidDataWritingVisitor mergedDataWriter) {
+    mergedDataWriter.defineAttribute(key, value);
+  }
+
+  @Override
+  public int serializeTo(int sourceId, Namespaces namespaces, OutputStream output)
+      throws IOException {
+    SerializeFormat.DataValue.Builder builder =
+        XmlResourceValues.newSerializableDataValueBuilder(sourceId);
+    Builder xmlValueBuilder =
+        builder
+            .getXmlValueBuilder()
+            .putAllNamespace(namespaces.asMap())
+            .setType(SerializeFormat.DataValueXml.XmlType.RESOURCES_ATTRIBUTE)
+            .putAttribute(name, value);
+    builder.setXmlValue(xmlValueBuilder);
+    return XmlResourceValues.serializeProtoDataValue(output, builder);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, value);
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (!(obj instanceof ResourcesAttribute)) {
+      return false;
+    }
+    ResourcesAttribute other = (ResourcesAttribute) obj;
+    return Objects.equals(name, other.name)
+        && Objects.equals(value, other.value);
+  }
+
+  @Override
+  public String toString() {
+    return MoreObjects.toStringHelper(getClass())
+        .add("name", name)
+        .add("value", value)
+        .toString();
+  }
+
+  @Override
+  public XmlResourceValue combineWith(XmlResourceValue value) {
+    if (!(value instanceof ResourcesAttribute)) {
+      throw new IllegalArgumentException(value + "is not combinable with " + this);
+    }
+    ResourcesAttribute other = (ResourcesAttribute) value;
+    if ((name.startsWith("tools:keep") && other.name.startsWith("tools:keep"))
+        || (name.startsWith("tools:discard") && other.name.startsWith("tools:discard"))) {
+      return of(name, Joiner.on(',').join(value, other.value));
+    }
+    throw new IllegalArgumentException(value + "is not combinable with " + this);
+  }
+
+  @Override
+  public void writeResourceToClass(
+      FullyQualifiedName key, AndroidResourceClassWriter resourceClassWriter) {
+    // This is an xml attribute and does not have any java representation.
+  }
+}