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  1. JDK
  2. JDK-8194667

Regex: Serialization doesn't work with match flags

    Details

    • Subcomponent:
    • Resolved In Build:
      b01
    • CPU:
      x86_64
    • OS:
      generic
    • Verification:
      Verified

      Description

      FULL PRODUCT VERSION :


      A DESCRIPTION OF THE PROBLEM :
      The serialization and deserialization of a pattern that contains a (?idmsuxU-idmsuxU) - construct does not work.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      1) Compile the pattern "a(?-i)b" with Pattern.CASE_INSENSITIVE
      2) Serialize and deserialize it using ObjectOutput- and ObjectInputStream
      3) The pattern should match against the input "Ab" but does not

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      The pattern should match against the input "Ab"
      ACTUAL -
      The pattern didn't match against the input "Ab"

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.util.regex.*;

      import java.io.ByteArrayInputStream;
      import java.io.ByteArrayOutputStream;
      import java.io.IOException;
      import java.io.ObjectInputStream;
      import java.io.ObjectOutputStream;

      public class RegexBug4 {

      public static void main(String [] args) {
      Pattern p = Pattern.compile("a(?-i)b", Pattern.CASE_INSENSITIVE );
      System.out.println(p.matcher("Ab").matches() );
      System.out.println(p.matcher("AB").matches() );
      p = serializeAndDeserialize(p);
      System.out.println(p.matcher("Ab").matches() );
      System.out.println(p.matcher("AB").matches() );
      }

      private static Pattern serializeAndDeserialize(Pattern pattern){
      try {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      ObjectOutputStream oos = new ObjectOutputStream(baos);
      oos.writeObject(pattern);
      oos.close();
      ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()));
      Pattern serializedPattern = (Pattern) ois.readObject();
      ois.close();

      return serializedPattern;
      } catch( IOException | ClassNotFoundException ioe) {
      ioe.printStackTrace();
      return null;
      }
      }
      }
      ---------- END SOURCE ----------

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            • Assignee:
              sherman Xueming Shen
              Reporter:
              webbuggrp Webbug Group
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              Dates

              • Created:
                Updated:
                Resolved: