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libsrc/jpacker/src/com/jpacker/evaluators/StringEvaluator.java

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+/**
+ * Packer version 3.0 (final)
+ * Copyright 2004-2007, Dean Edwards
+ * Web: {@link http://dean.edwards.name/}
+ * 
+ * This software is licensed under the MIT license
+ * Web: {@link http://www.opensource.org/licenses/mit-license}
+ * 
+ * Ported to Java by Pablo Santiago based on C# version by Jesse Hansen, <twindagger2k @ msn.com>
+ * Web: {@link http://jpacker.googlecode.com/}
+ * Email: <pablo.santiago @ gmail.com>
+ */
+package com.jpacker.evaluators;
+
+import java.util.regex.Matcher;
+
+public class StringEvaluator extends AbstractEvaluator implements Evaluator {
+
+    private String replacement;
+
+    public StringEvaluator(String replacement) {
+        this.replacement = replacement;
+    }
+
+    /**
+     * Replacement function for complicated lookups (e.g. Hello $3 $2)
+     *
+     */
+    @Override
+    public String evaluate(Matcher matcher, int offset) {
+        int length = getJPattern().getLength();
+        String result = replacement;
+        while (length-- > 0) {
+            String mg = matcher.group(offset + length);
+            result = result.replace("$" + length, mg == null ? "" : mg);
+        }
+        return result;
+    }
+}