test/lib/jdk/test/lib/hprof/parser/HprofReader.java

rev 58893 : 8237354: Add option to jcmd to write a gzipped heap dump
Reviewed-by:

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -154,16 +154,15 @@
 
     public static boolean verifyMagicNumber(int numberRead) {
         return (numberRead == MAGIC_NUMBER);
     }
 
-    public HprofReader(String fileName, PositionDataInputStream in,
+    public HprofReader(ReadBuffer readBuffer, PositionDataInputStream in,
                        int dumpNumber, boolean callStack, int debugLevel)
                        throws IOException {
         super(in);
-        RandomAccessFile file = new RandomAccessFile(fileName, "r");
-        this.snapshot = new Snapshot(MappedReadBuffer.create(file));
+        this.snapshot = new Snapshot(readBuffer);
         this.dumpsToSkip = dumpNumber - 1;
         this.callStack = callStack;
         this.debugLevel = debugLevel;
         names = new Hashtable<Long, String>();
         threadObjects = new Hashtable<Integer, ThreadObject>(43);

@@ -173,10 +172,17 @@
             stackTraces = new Hashtable<Integer, StackTrace>(43);
             classNameFromSerialNo = new Hashtable<Integer, String>();
         }
     }
 
+    public HprofReader(String fileName, PositionDataInputStream in,
+                       int dumpNumber, boolean callStack, int debugLevel)
+                       throws IOException {
+        this(MappedReadBuffer.create(new RandomAccessFile(fileName, "r")),
+            in, dumpNumber, callStack, debugLevel);
+    }
+
     public Snapshot read() throws IOException {
         currPos = 4;    // 4 because of the magic number
         version = readVersionHeader();
         identifierSize = in.readInt();
         snapshot.setIdentifierSize(identifierSize);