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diff --git a/benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/Adapter.java b/benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/Adapter.java
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+// ASM: a very small and fast Java bytecode manipulation framework
+// Copyright (c) 2000-2011 INRIA, France Telecom
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the copyright holders nor the names of its
+//    contributors may be used to endorse or promote products derived from
+//    this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+package org.objectweb.asm.benchmarks;
+
+/**
+ * An empty class adapter, which reads and writes Java classes with no intermediate transformation.
+ *
+ * @author Eric Bruneton
+ */
+public abstract class Adapter {
+
+  /**
+   * Returns the version of this class adapter.
+   *
+   * @return the version of this class adapter, or an empty string if there is no version.
+   */
+  public String getVersion() {
+    return "";
+  }
+
+  /**
+   * Returns the access flags, name, super class and interfaces of the given class.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return the access flags, name, super class and interfaces of the given class.
+   */
+  public ClassInfo getClassInfo(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Returns an in-memory, object representation of the given class.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return an in-memory, object representation of the given class.
+   */
+  public Object getClassObjectModel(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Reads a class and returns the number of 'elements' it contains.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return the number of 'elements' found in the given class.
+   */
+  public int read(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Reads a class and writes and returns an equivalent one.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @param computeMaxs whether to recompute the maximum stack size and maximum number of local
+   *     variables for each method.
+   * @return the rebuilt class.
+   */
+  public byte[] readAndWrite(final byte[] classFile, final boolean computeMaxs) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Reads a class and writes and returns an equivalent one with all its stack map frames
+   * recomputed.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return the rebuilt class.
+   */
+  public byte[] readAndWriteWithComputeFrames(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Reads a class and writes and returns an equivalent one, sharing the same constant pool.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return the rebuilt class.
+   */
+  public byte[] readAndWriteWithCopyPool(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Reads a class and writes and returns an equivalent one, via the construction of in-memory,
+   * object representation of the class.
+   *
+   * @param classFile a JVMS ClassFile structure
+   * @return the rebuilt class.
+   */
+  public byte[] readAndWriteWithObjectModel(final byte[] classFile) {
+    throw new UnsupportedOperationException();
+  }
+
+  /** The access flags, name, super class and interfaces of a class. */
+  public static class ClassInfo {
+
+    int access;
+    String name;
+    String superClass;
+    String[] interfaces;
+
+    /**
+     * Constructs a new {@link ClassInfo}.
+     *
+     * @param access the class's access flags.
+     * @param name the internal name of the class.
+     * @param superClass the internal of name of the super class.
+     * @param interfaces the internal names of the class's interfaces
+     */
+    public ClassInfo(
+        final int access,
+        final String name,
+        final String superClass,
+        final String[] interfaces) { // NOPMD(ArrayIsStoredDirectly): non public API.
+      this.access = access;
+      this.name = name;
+      this.superClass = superClass;
+      this.interfaces = interfaces;
+    }
+  }
+}