1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/buildeventstream/transports/BuildEventTransportFactory.java b/src/main/java/com/google/devtools/build/lib/buildeventstream/transports/BuildEventTransportFactory.java
new file mode 100644
index 0000000000..f456b189d6
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/buildeventstream/transports/BuildEventTransportFactory.java
@@ -0,0 +1,74 @@
+// 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.buildeventstream.transports;
+
+import static com.google.common.base.Strings.isNullOrEmpty;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.ImmutableSet.Builder;
+import com.google.devtools.build.lib.buildeventstream.BuildEventTransport;
+import java.io.IOException;
+
+/** Factory used to create a Set of BuildEventTransports from BuildEventStreamOptions. */
+public enum BuildEventTransportFactory {
+  TEXT_TRANSPORT {
+    @Override
+    protected boolean enabled(BuildEventStreamOptions options) {
+      return !isNullOrEmpty(options.getBuildEventTextFile());
+    }
+
+    @Override
+    protected BuildEventTransport create(BuildEventStreamOptions options) throws IOException {
+      return new TextFormatFileTransport(options.getBuildEventTextFile());
+    }
+  },
+
+  BINARY_TRANSPORT {
+    @Override
+    protected boolean enabled(BuildEventStreamOptions options) {
+      return !isNullOrEmpty(options.getBuildEventBinaryFile());
+    }
+
+    @Override
+    protected BuildEventTransport create(BuildEventStreamOptions options) throws IOException {
+      return new BinaryFormatFileTransport(options.getBuildEventBinaryFile());
+    }
+  };
+
+  /**
+   * Creates a {@link ImmutableSet} of {@link BuildEventTransport} based on the specified {@link
+   * BuildEventStreamOptions}.
+   *
+   * @param options Options used configure and create the returned BuildEventTransports.
+   * @return A {@link ImmutableSet} of BuildEventTransports. This set may be empty.
+   * @throws IOException Exception propagated from a {@link BuildEventTransport} creation failure.
+   */
+  public static ImmutableSet<BuildEventTransport> createFromOptions(BuildEventStreamOptions options)
+      throws IOException {
+    Builder<BuildEventTransport> buildEventTransportsBuilder = ImmutableSet.builder();
+    for (BuildEventTransportFactory transportFactory : BuildEventTransportFactory.values()) {
+      if (transportFactory.enabled(options)) {
+        buildEventTransportsBuilder.add(transportFactory.create(options));
+      }
+    }
+    return buildEventTransportsBuilder.build();
+  }
+
+  /** Returns true if this factory BuildEventTransport is enabled by the specified options. */
+  protected abstract boolean enabled(BuildEventStreamOptions options);
+
+  /** Creates a BuildEventTransport from the specified options. */
+  protected abstract BuildEventTransport create(BuildEventStreamOptions options) throws IOException;
+}