From f7ef31ce8b723e425a66aafb8c0beddeabfe9a66 Mon Sep 17 00:00:00 2001
From: chibash <chiba@javassist.org>
Date: Mon, 2 Sep 2019 01:08:17 +0900
Subject: [PATCH] fixes Issue #271

---
 Readme.html                           |  2 +-
 src/main/javassist/ClassPool.java     |  8 ++++++++
 src/main/javassist/ClassPoolTail.java | 10 +++++++---
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/Readme.html b/Readme.html
index ae68ac6c..461c614a 100644
--- a/Readme.html
+++ b/Readme.html
@@ -283,7 +283,7 @@ see javassist.Dump.
 
 <p>-version 3.26
 <ul>
-   <li>GitHub Issue #270 (PR #272), Issue #265 (PR #267).
+   <li>GitHub Issue #270 (PR #272), Issue #265 (PR #267), Issue #271 and #222.
 </ul>
 
 <p>-version 3.25 on April 16, 2019
diff --git a/src/main/javassist/ClassPool.java b/src/main/javassist/ClassPool.java
index 7d8cde08..326c643b 100644
--- a/src/main/javassist/ClassPool.java
+++ b/src/main/javassist/ClassPool.java
@@ -113,6 +113,14 @@ public class ClassPool {
      */
     public static boolean releaseUnmodifiedClassFile = true;
 
+    /**
+     * If true, the contents of a jar file are cached after the jar
+     * file is opened.
+     *
+     * <p>The initial value is true.
+     */
+    public static boolean cacheOpenedJarFile = true;    // see ClassPoolTail.JarClassPath#openClassfile(String)
+
     protected ClassPoolTail source;
     protected ClassPool parent;
     protected Hashtable classes;        // should be synchronous
diff --git a/src/main/javassist/ClassPoolTail.java b/src/main/javassist/ClassPoolTail.java
index 965d72fb..d9d2198e 100644
--- a/src/main/javassist/ClassPoolTail.java
+++ b/src/main/javassist/ClassPoolTail.java
@@ -159,9 +159,13 @@ final class JarClassPath implements ClassPath {
         URL jarURL = find(classname);
         if (null != jarURL)
             try {
-                java.net.URLConnection con = jarURL.openConnection();
-                con.setUseCaches(false);
-                return con.getInputStream();
+                if (ClassPool.cacheOpenedJarFile)
+                    return jarURL.openConnection().getInputStream();
+                else {
+                    java.net.URLConnection con = jarURL.openConnection();
+                    con.setUseCaches(false);
+                    return con.getInputStream();
+                }
             }
             catch (IOException e) {
                 throw new NotFoundException("broken jar file?: "
-- 
2.39.5