--- /dev/null	2015-06-23 14:29:23.000000000 +0200
+++ new/src/java.base/share/classes/jdk/internal/jimage/decompressor/CompressedResourceHeader.java	2015-06-23 14:29:23.000000000 +0200
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015, 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.jimage.decompressor;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Objects;
+import jdk.internal.jimage.decompressor.ResourceDecompressor.StringsProvider;
+
+/**
+ *
+ * A resource header for compressed resource. This class is handled internally,
+ * you don't have to add header to the resource, headers are added automatically
+ * for compressed resources.
+ */
+public final class CompressedResourceHeader {
+
+    private static final int SIZE = 21;
+    public static final int MAGIC = 0xCAFEFAFA;
+    private final int uncompressedSize;
+    private final int compressedSize;
+    private final int decompressorNameOffset;
+    private final int contentOffset;
+    private final boolean isTerminal;
+
+    public CompressedResourceHeader(int compressedSize,
+            int uncompressedSize, int decompressorNameOffset, int contentOffset,
+            boolean isTerminal) {
+        this.compressedSize = compressedSize;
+        this.uncompressedSize = uncompressedSize;
+        this.decompressorNameOffset = decompressorNameOffset;
+        this.contentOffset = contentOffset;
+        this.isTerminal = isTerminal;
+    }
+
+    public boolean isTerminal() {
+        return isTerminal;
+    }
+
+    public int getDecompressorNameOffset() {
+        return decompressorNameOffset;
+    }
+
+    public int getContentOffset() {
+        return contentOffset;
+    }
+
+    public String getStoredContent(StringsProvider provider) {
+        Objects.nonNull(provider);
+        if(contentOffset == -1) {
+            return null;
+        }
+        return provider.getString(contentOffset);
+    }
+
+    public int getUncompressedSize() {
+        return uncompressedSize;
+    }
+
+    public int getResourceSize() {
+        return compressedSize;
+    }
+
+    public byte[] getBytes(ByteOrder order) {
+        Objects.requireNonNull(order);
+        ByteBuffer buffer = ByteBuffer.allocate(SIZE);
+        buffer.order(order);
+        buffer.putInt(MAGIC);
+        buffer.putInt(compressedSize);
+        buffer.putInt(uncompressedSize);
+        buffer.putInt(decompressorNameOffset);
+        buffer.putInt(contentOffset);
+        buffer.put(isTerminal ? (byte)1 : (byte)0);
+        return buffer.array();
+    }
+
+    public static int getSize() {
+        return SIZE;
+    }
+
+    public static CompressedResourceHeader readFromResource(ByteOrder order,
+            byte[] resource) {
+        Objects.requireNonNull(order);
+        Objects.requireNonNull(resource);
+        if (resource.length < getSize()) {
+            return null;
+        }
+        ByteBuffer buffer = ByteBuffer.wrap(resource, 0, SIZE);
+        buffer.order(order);
+        int magic = buffer.getInt();
+        if(magic != MAGIC) {
+            return null;
+        }
+        int size = buffer.getInt();
+        int uncompressedSize = buffer.getInt();
+        int decompressorNameOffset = buffer.getInt();
+        int contentIndex = buffer.getInt();
+        byte isTerminal = buffer.get();
+        return new CompressedResourceHeader(size, uncompressedSize,
+                decompressorNameOffset, contentIndex, isTerminal == 1);
+    }
+}