1 files changed, 82 insertions, 0 deletions
diff --git a/third_party/jarjar/java/com/tonicsystems/jarjar/RulesFileParser.java b/third_party/jarjar/java/com/tonicsystems/jarjar/RulesFileParser.java
new file mode 100644
index 0000000000..f737e494fb
--- /dev/null
+++ b/third_party/jarjar/java/com/tonicsystems/jarjar/RulesFileParser.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2007 Google Inc.
+ *
+ * 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.tonicsystems.jarjar;
+
+import java.io.*;
+import java.util.*;
+
+class RulesFileParser {
+  private RulesFileParser() {}
+
+  public static List<PatternElement> parse(File file) throws IOException {
+    return parse(new FileReader(file));
+  }
+
+  public static List<PatternElement> parse(String value) throws IOException {
+    return parse(new java.io.StringReader(value));
+  }
+
+  private static String stripComment(String in) {
+    int p = in.indexOf("#");
+    return p < 0 ? in : in.substring(0, p);
+  }
+
+  private static List<PatternElement> parse(Reader r) throws IOException {
+    try {
+      List<PatternElement> patterns = new ArrayList<PatternElement>();
+      BufferedReader br = new BufferedReader(r);
+      int c = 1;
+      String line;
+      while ((line = br.readLine()) != null) {
+        line = stripComment(line);
+        if ("".equals(line)) {
+          continue;
+        }
+        String[] parts = line.split("\\s+");
+        if (parts.length < 2) {
+          error(c, parts);
+        }
+        String type = parts[0];
+        PatternElement element = null;
+        if (type.equals("rule")) {
+          if (parts.length < 3) {
+            error(c, parts);
+          }
+          Rule rule = new Rule();
+          rule.setResult(parts[2]);
+          element = rule;
+        } else if (type.equals("zap")) {
+          element = new Zap();
+        } else if (type.equals("keep")) {
+          element = new Keep();
+        } else {
+          error(c, parts);
+        }
+        element.setPattern(parts[1]);
+        patterns.add(element);
+        c++;
+      }
+      return patterns;
+    } finally {
+      r.close();
+    }
+  }
+
+  private static void error(int line, String[] parts) {
+    throw new IllegalArgumentException("Error on line " + line + ": " + Arrays.asList(parts));
+  }
+}