1 files changed, 69 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/pkgcache/TargetPatternResolverUtil.java b/src/main/java/com/google/devtools/build/lib/pkgcache/TargetPatternResolverUtil.java
new file mode 100644
index 0000000000..6bbf55c7fe
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/pkgcache/TargetPatternResolverUtil.java
@@ -0,0 +1,69 @@
+// 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.pkgcache;
+
+import com.google.devtools.build.lib.cmdline.ResolvedTargets;
+import com.google.devtools.build.lib.cmdline.TargetParsingException;
+import com.google.devtools.build.lib.packages.Package;
+import com.google.devtools.build.lib.packages.Target;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.lib.util.StringUtilities;
+
+/**
+ * Common utility methods for target pattern resolution.
+ */
+public final class TargetPatternResolverUtil {
+  private TargetPatternResolverUtil() {
+    // Utility class.
+  }
+
+  // Parse 'label' as a Label, mapping Label.SyntaxException into
+  // TargetParsingException.
+  public static Label label(String label) throws TargetParsingException {
+    try {
+      return Label.parseAbsolute(label);
+    } catch (Label.SyntaxException e) {
+      throw invalidTarget(label, e.getMessage());
+    }
+  }
+
+  /**
+   * Returns a new exception indicating that a command-line target is invalid.
+   */
+  private static TargetParsingException invalidTarget(String packageName,
+                                                      String additionalMessage) {
+    return new TargetParsingException("invalid target format: '" +
+        StringUtilities.sanitizeControlChars(packageName) + "'; " +
+        StringUtilities.sanitizeControlChars(additionalMessage));
+  }
+
+  public static String getParsingErrorMessage(String message, String originalPattern) {
+    if (originalPattern == null) {
+      return message;
+    } else {
+      return String.format("while parsing '%s': %s", originalPattern, message);
+    }
+  }
+
+  public static ResolvedTargets<Target> resolvePackageTargets(Package pkg,
+                                                              FilteringPolicy policy) {
+    ResolvedTargets.Builder<Target> builder = ResolvedTargets.builder();
+    for (Target target : pkg.getTargets()) {
+      if (policy.shouldRetain(target, false)) {
+        builder.add(target);
+      }
+    }
+    return builder.build();
+  }
+}