1 files changed, 92 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/packages/FileTarget.java b/src/main/java/com/google/devtools/build/lib/packages/FileTarget.java
new file mode 100644
index 0000000000..60f30ce517
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/packages/FileTarget.java
@@ -0,0 +1,92 @@
+// 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.packages;
+
+import com.google.common.base.Preconditions;
+import com.google.devtools.build.lib.packages.License.DistributionType;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.lib.util.FileType.HasFilename;
+
+import java.util.Set;
+
+/**
+ * Common superclass for InputFile and OutputFile which provides implementation
+ * for the file operations in common.
+ */
+public abstract class FileTarget implements Target, HasFilename {
+  protected final Package pkg;
+  protected final Label label;
+
+  /**
+   * Constructs a file with the given label, which must be in the given package.
+   */
+  protected FileTarget(Package pkg, Label label) {
+    Preconditions.checkArgument(label.getPackageFragment().equals(pkg.getNameFragment()));
+    this.pkg = pkg;
+    this.label = label;
+  }
+
+  @Override
+  public String getFilename() {
+    return label.getName();
+  }
+
+  @Override
+  public Label getLabel() {
+    return label;
+  }
+
+  @Override
+  public String getName() {
+    return label.getName();
+  }
+
+  @Override
+  public Package getPackage() {
+    return pkg;
+  }
+
+  @Override
+  public String toString() {
+    return getTargetKind() + "(" + getLabel() + ")"; // Just for debugging
+  }
+
+  @Override
+  public int hashCode() {
+    return label.hashCode();
+  }
+
+  @Override
+  public Set<DistributionType> getDistributions() {
+    return getPackage().getDefaultDistribs();
+  }
+
+  /**
+   * {@inheritDoc}
+   *
+   * <p>File licenses are strange, and require some special handling. When
+   * you ask "What license covers this file?" in a query, the answer should
+   * be the license declared for the enclosing package. On the other hand,
+   * if the file is a source for a rule target, and the rule's license declares
+   * more exceptions than the default inherited by the file, the rule's
+   * more liberal target should override the stricter license of the file. In
+   * other words, the license of the rule always overrides the license of
+   * the non-rule file targets that are inputs to that rule.
+   */
+  @Override
+  public License getLicense() {
+    return getPackage().getDefaultLicense();
+  }
+}