1 files changed, 81 insertions, 0 deletions
diff --git a/src/main/com/tonicsystems/jarjar/RulesFileParser.java b/src/main/com/tonicsystems/jarjar/RulesFileParser.java
new file mode 100644
index 0000000..f54f3b9
--- /dev/null
+++ b/src/main/com/tonicsystems/jarjar/RulesFileParser.java
@@ -0,0 +1,81 @@
+/**
+ * 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 (line.isEmpty())
+                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));
+    }
+}