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diff --git a/libjava/classpath/javax/management/openmbean/ArrayType.java b/libjava/classpath/javax/management/openmbean/ArrayType.java
new file mode 100644
index 000000000..fc1887014
--- /dev/null
+++ b/libjava/classpath/javax/management/openmbean/ArrayType.java
@@ -0,0 +1,672 @@
+/* ArrayType.java -- Open type descriptor for an array.
+   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package javax.management.openmbean;
+
+import java.lang.reflect.Array;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * The open type descriptor for arrays of open data values.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+public class ArrayType<T>
+  extends OpenType<T>
+{
+
+  /**
+   * Compatible with JDK 1.5
+   */
+  private static final long serialVersionUID = 720504429830309770L;
+
+  /**
+   * The number of dimensions arrays of this type has.
+   */
+  private int dimension;
+
+  /**
+   * The element type of arrays of this type.
+   */
+  private OpenType<?> elementType;
+
+  /**
+   * True if this type represents a primitive array.
+   */
+  private boolean primitiveArray;
+
+  /**
+   * The hash code of this instance.
+   */
+  private transient Integer hashCode;
+
+  /**
+   * The <code>toString()</code> result of this instance.
+   */
+  private transient String string;
+
+  /**
+   * A cache of {@link ArrayType} instances created
+   * by {@link #getArrayType(OpenType)}.
+   */
+  private static final Map<OpenType<?>,ArrayType<?>> cache =
+    new HashMap<OpenType<?>,ArrayType<?>>();
+
+  /**
+   * A cache of {@link ArrayType} instances created
+   * by {@link #getPrimitiveArrayType(Class)}.
+   */
+  private static final Map<Class<?>,ArrayType<?>> primCache =
+    new HashMap<Class<?>,ArrayType<?>>();
+
+  /**
+   * Returns the class name of the array, given the element
+   * class name and its dimensions.
+   *
+   * @param elementType the type of the array's elements.
+   * @param dim the dimensions of the array.
+   * @param primitive true if this should be a primitive array.
+   * @return the array's class name.
+   * @throws OpenDataException if the class name does not reference
+   *                           a loadable class.
+   */
+  private static final String getArrayClassName(OpenType<?> elementType,
+                                                int dim,
+                                                boolean primitive)
+    throws OpenDataException
+  {
+    Class<?> type;
+    if (primitive)
+      type = getPrimitiveTypeClass((SimpleType<?>) elementType);
+    else
+      {
+        String className = elementType.getClassName();
+        try
+          {
+            type = Class.forName(className);
+          }
+        catch (ClassNotFoundException e)
+          {
+            throw new OpenDataException("The class name, " + className +
+                                        ", is unavailable.");
+          }
+      }
+    while (type.isArray())
+      type = type.getComponentType();
+    return
+      Array.newInstance(type,
+                        new int[getDimensions(elementType, dim)]).getClass().getName();
+  }
+
+  /**
+   * Returns the dimensions of the new {@link ArrayType},
+   * based on whether the given element type is already an
+   * {@link ArrayType} or not.
+   *
+   * @param elementType the type of the array.
+   * @param dim the proposed dimensions.
+   * @return the resultant dimensions.
+   * @throws IllegalArgumentException if <code>dim</code> is less than 1.
+   */
+  private static final int getDimensions(OpenType<?> elementType,
+                                         int dim)
+  {
+    if (dim < 1)
+      throw new IllegalArgumentException("Dimensions must be greater " +
+                                         "than or equal to 1.");
+    if (elementType instanceof ArrayType)
+      return dim + ((ArrayType<?>) elementType).getDimension();
+    return dim;
+  }
+
+  /**
+   * Returns the appropriate primitive type name, given the
+   * corresponding wrapper class.
+   *
+   * @param type the type to convert.
+   * @return the corresponding primitive type.
+   * @throws OpenDataException if {@code type} is not a valid
+   *                           {@link Class} for a primitive type.
+   *
+   */
+  private static final SimpleType<?> getPrimitiveType(Class<?> type)
+    throws OpenDataException
+  {
+    if (type.equals(Boolean.TYPE))
+      return SimpleType.BOOLEAN;
+    if (type.equals(Byte.TYPE))
+      return SimpleType.BYTE;
+    if (type.equals(Character.TYPE))
+      return SimpleType.CHARACTER;
+    if (type.equals(Double.TYPE))
+      return SimpleType.DOUBLE;
+    if (type.equals(Float.TYPE))
+      return SimpleType.FLOAT;
+    if (type.equals(Integer.TYPE))
+      return SimpleType.INTEGER;
+    if (type.equals(Long.TYPE))
+      return SimpleType.LONG;
+    if (type.equals(Short.TYPE))
+      return SimpleType.SHORT;
+    if (type.equals(Void.TYPE))
+      return SimpleType.VOID;
+    throw new OpenDataException(type + " is not a primitive type.");
+  }
+
+  /**
+   * Returns the appropriate primitive type name, given the
+   * corresponding wrapper class.
+   *
+   * @param type the type to convert.
+   * @return the corresponding primitive type.
+   * @throws OpenDataException if {@code type} is not a valid
+   *                           {@link SimpleType} for a primitive type.
+   *
+   */
+  private static final Class<?> getPrimitiveTypeClass(SimpleType<?> type)
+    throws OpenDataException
+  {
+    if (type.equals(SimpleType.BOOLEAN))
+      return Boolean.TYPE;
+    if (type.equals(SimpleType.BYTE))
+      return Byte.TYPE;
+    if (type.equals(SimpleType.CHARACTER))
+      return Character.TYPE;
+    if (type.equals(SimpleType.DOUBLE))
+      return Double.TYPE;
+    if (type.equals(SimpleType.FLOAT))
+      return Float.TYPE;
+    if (type.equals(SimpleType.INTEGER))
+      return Integer.TYPE;
+    if (type.equals(SimpleType.LONG))
+      return Long.TYPE;
+    if (type.equals(SimpleType.SHORT))
+      return Short.TYPE;
+    if (type.equals(SimpleType.VOID))
+      return Void.TYPE;
+    throw new OpenDataException(type + " is not a primitive type.");
+  }
+
+  /**
+   * Returns the element type that will actually be used, if the
+   * specified element type is passed to a constructor.  This is
+   * necessary to ensure that a non-array type is still returned when
+   * an {@link ArrayType} is constructed from an {@link ArrayType}.
+   *
+   * @param elemType the element type that was supplied.
+   * @return the element type that will be used.
+   */
+  private static final OpenType<?> getElementType(OpenType<?> elemType)
+  {
+    if (elemType instanceof ArrayType)
+      return ((ArrayType<?>) elemType).getElementOpenType();
+    return elemType;
+  }
+
+  /**
+   * Returns the element type name that will actually be used, if the
+   * specified element type is passed to a constructor.  This is
+   * necessary to ensure that a non-array type is still returned when
+   * an {@link ArrayType} is constructed from an {@link ArrayType},
+   * and that primitive arrays are described correctly.
+   *
+   * @param elemType the element type that was supplied.
+   * @return the element type name that will be used.
+   * @throws OpenDataException if the element type is not a valid
+   *                           {@link SimpleType} for a primitive type.
+   */
+  private static final String getElementTypeName(OpenType<?> elemType)
+    throws OpenDataException
+  {
+    OpenType<?> trueElemType = getElementType(elemType);
+    if (elemType instanceof ArrayType &&
+        ((ArrayType<?>) elemType).isPrimitiveArray())
+      return getPrimitiveTypeClass((SimpleType<?>) trueElemType).getName();
+    return trueElemType.getClassName();
+  }
+
+  /**
+   * <p>
+   * Constructs a new {@link ArrayType} instance for an array of the
+   * specified type with the supplied number of dimensions.  The attributes
+   * used by the superclass, {@link OpenType}, are automatically defined,
+   * based on these values.  Both the class name and type name are set
+   * to the value returned by the {@link java.lang.Class#getName()} of
+   * the array's class (i.e. the element type, preceded by n instances of
+   * '[' and an 'L', where n is the number of dimensions the array has).
+   * The description is based upon the template <code>n-dimension array
+   * of e</code>, where n is the number of dimensions of the array, and
+   * e is the element type.  The class name of the actual elements is
+   * obtainable by calling {@link OpenType#getClassName()} on the result
+   * of {@link #getElementOpenType()}.
+   * </p>
+   * <p>
+   * As an example, the array type returned by
+   * <code>new ArrayType(6, SimpleType.INTEGER)</code> has the following
+   * values:
+   * </p>
+   * <table>
+   * <th><td>Attribute</td><td>Value</td></th>
+   * <tr><td>Class Name</td><td><code>[[[[[[Ljava.lang.Integer;</code>
+   * </td></tr>
+   * <tr><td>Type Name</td><td><code>[[[[[[Ljava.lang.Integer;</code>
+   * </td></tr>
+   * <tr><td>Description</td><td><code>6-dimension array of
+   * java.lang.Integer</code></td></tr>
+   * <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
+   * </td></tr>
+   * </table>
+   * <p>
+   * The dimensions of the array must be equal to or greater than 1.  The
+   * element type must be an instance of {@link SimpleType},
+   * {@link CompositeType} or {@link TabularType}.
+   * </p>
+   *
+   * @param dim the dimensions of the array.
+   * @param elementType the type of the elements of the array.
+   * @throws IllegalArgumentException if <code>dim</code> is less than 1.
+   * @throws OpenDataException if the element type is not an instance of either
+   *                           {@link SimpleType}, {@link CompositeType}
+   *                           or {@link TabularType}.
+   */
+  public ArrayType(int dim, OpenType<?> elementType)
+    throws OpenDataException
+  {
+    super(getArrayClassName(elementType, dim, false),
+          getArrayClassName(elementType, dim, false),
+          getDimensions(elementType, dim) + "-dimension array of "
+          + getElementTypeName(elementType));
+    if (!(elementType instanceof SimpleType ||
+          elementType instanceof CompositeType ||
+          elementType instanceof TabularType ||
+          elementType instanceof ArrayType))
+      throw new OpenDataException("The element type must be a simple " +
+                                  "type, an array type, a composite type " +
+                                  "or a tabular type.");
+    dimension = getDimensions(elementType, dim);
+    this.elementType = getElementType(elementType);
+    primitiveArray = (elementType instanceof ArrayType &&
+                      ((ArrayType<?>) elementType).isPrimitiveArray());
+  }
+
+  /**
+   * <p>
+   * Constructs a new {@link ArrayType} instance for a unidimensional
+   * array of the specified {@link SimpleType}.  The attributes
+   * used by the superclass, {@link OpenType}, are automatically defined,
+   * based on these values.  Both the class name and type name are set
+   * to the value returned by the {@link java.lang.Class#getName()} of
+   * the array's class.  If the array is of a primitive type (indicated
+   * by giving {@code primitiveArray} the value {@code true}), the
+   * name will be '[' followed by the appropriate letter for the
+   * primitive type (see {@link java.lang.Class#getName()}).  If the
+   * array is not of a primitive type, then the name is formed from
+   * the element type, preceded by '[' and an 'L', in the same way
+   * as when the multi-dimensional constructor is used.
+   * </p>
+   * <p>
+   * The description is based upon the template <code>1-dimension array
+   * of e</code>, where e is either the primitive type or a class name,
+   * depending on whether the array itself is of a primitive type or not.
+   * The class name of the actual elements is obtainable by calling
+   * {@link OpenType#getClassName()} on the result of
+   * {@link #getElementOpenType()}.  This will be the appropriate wrapper
+   * class for a primitive type.
+   * </p>
+   * <p>
+   * As an example, the array type returned by
+   * <code>new ArrayType(SimpleType.INTEGER, true)</code> has the following
+   * values:
+   * </p>
+   * <table>
+   * <th><td>Attribute</td><td>Value</td></th>
+   * <tr><td>Class Name</td><td><code>[I</code>
+   * </td></tr>
+   * <tr><td>Type Name</td><td><code>[I</code>
+   * </td></tr>
+   * <tr><td>Description</td><td><code>1-dimension array of int</code></td></tr>
+   * <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
+   * </td></tr>
+   * </table>
+   *
+   * @param elementType the type of the elements of the array.
+   * @param primitiveArray true if the array should be of a primitive type.
+   * @throws OpenDataException if {@code primitiveArray} is {@code true},
+   *                           and {@link elementType} is not a valid
+   *                           {@link SimpleType} for a primitive type.
+   * @since 1.6
+   */
+  public ArrayType(SimpleType<?> elementType, boolean primitiveArray)
+    throws OpenDataException
+  {
+    super(getArrayClassName(elementType, 1, primitiveArray),
+          getArrayClassName(elementType, 1, primitiveArray),
+          "1-dimension array of " +
+          (primitiveArray ? getPrimitiveTypeClass(elementType).getName()
+           : elementType.getClassName()));
+    dimension = 1;
+    this.elementType = elementType;
+    this.primitiveArray = primitiveArray;
+  }
+
+  /**
+   * <p>
+   * Compares this array type with another object
+   * for equality.  The objects are judged to be equal if:
+   * </p>
+   * <ul>
+   * <li><code>obj</code> is not null.</li>
+   * <li><code>obj</code> is an instance of
+   * {@link ArrayType}.</li>
+   * <li>The dimensions are equal.</li>
+   * <li>The element types are equal.</li>
+   * <li>The primitive array flag is set the same in both
+   * instances.</li>
+   * </ul>
+   *
+   * @param obj the object to compare with.
+   * @return true if the conditions above hold.
+   */
+  public boolean equals(Object obj)
+  {
+    if (!(obj instanceof ArrayType))
+      return false;
+    ArrayType<?> atype = (ArrayType<?>) obj;
+    return (atype.getDimension() == dimension &&
+            atype.getElementOpenType().equals(elementType) &&
+            atype.isPrimitiveArray() == primitiveArray);
+  }
+
+  /**
+   * <p>
+   * Returns a new {@link ArrayType} instance in a type-safe
+   * manner, by ensuring that the type of the given {@link OpenType}
+   * matches the component type used in the type of the
+   * returned instance.  If the given {@link OpenType} is a
+   * {@link SimpleType}, {@link CompositeType} or
+   * {@link TabularType}, then a 1-dimensional array of that
+   * type is returned.  Otherwise, if the type is
+   * an {@link ArrayType} of n dimensions, the returned
+   * type is also an {@link ArrayType} but of n+1 dimensions.
+   * For example,
+   * {@code ArrayType.getArrayType(ArrayType.getArrayType(SimpleType.STRING))}
+   * returns a 2-dimensional array of {@link SimpleType#String}.
+   * </p>
+   * <p>
+   * This method caches its results, so that the same instance
+   * is returned from subsequent calls with the same parameters.
+   * </p>
+   *
+   * @param elementType the element type of the new array type.
+   * @throws OpenDataException if the class name of {@code elementType}
+   *                           is not in {@link OpenType#ALLOWED_CLASSNAMES_LIST}.
+   * @since 1.6
+   */
+  @SuppressWarnings("unchecked")
+  public static <E> ArrayType<E[]> getArrayType(OpenType<E> elementType)
+    throws OpenDataException
+  {
+    ArrayType<E[]> arr = (ArrayType<E[]>) cache.get(elementType);
+    if (arr != null)
+      return arr;
+    arr = new ArrayType<E[]>(1, elementType);
+    cache.put(elementType, arr);
+    return arr;
+  }
+
+  /**
+   * <p>
+   * Returns a new {@link ArrayType} instance for the given
+   * primitive type in a type-safe* manner, by ensuring that
+   * the type of the given {@link OpenType} matches the type
+   * used in the returned instance.  If the type is
+   * an array of n dimensions, the returned
+   * type is also an {@link ArrayType} of n dimensions.
+   * </p>
+   * <p>
+   * As an example, the array type returned by
+   * <code>getPrimitiveArrayType(Integer.TYPE)</code> has the
+   * following values:
+   * </p>
+   * <table>
+   * <th><td>Attribute</td><td>Value</td></th>
+   * <tr><td>Class Name</td><td><code>[I</code>
+   * </td></tr>
+   * <tr><td>Type Name</td><td><code>[I</code>
+   * </td></tr>
+   * <tr><td>Description</td><td><code>1-dimension array of int</code></td></tr>
+   * <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
+   * </td></tr>
+   * </table>
+   * <p>
+   * This method caches its results, so that the same instance
+   * is returned from subsequent calls with the same parameters.
+   * </p>
+   *
+   * @param type the type of the new {@link ArrayType}.
+   * @throws IllegalArgumentException if the type is not a primitive
+   *                                  array.
+   * @since 1.6
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> ArrayType<T> getPrimitiveArrayType(Class<T> type)
+  {
+    ArrayType<T> arr = (ArrayType<T>) primCache.get(type);
+    if (arr != null)
+      return arr;
+    Class<?> comType = type;
+    int dim = 0;
+    do
+      {
+        comType = comType.getComponentType();
+        ++dim;
+        if (comType == null)
+          throw new IllegalArgumentException("The given class is " +
+                                             "not an array.");
+      } while (comType.isArray());
+    try
+      {
+        arr = new ArrayType<T>(getPrimitiveType(comType), true);
+      }
+    catch (OpenDataException e)
+      {
+        throw new IllegalArgumentException("The array is not of a primitive " +
+                                           "type", e);
+      }
+    while (dim > 1)
+      try
+        {
+          arr = new ArrayType<T>(1, arr);
+          --dim;
+        }
+      catch (OpenDataException e)
+        {
+          throw (Error)
+            new InternalError("Couldn't generate extra dimensions").initCause(e);
+        }
+    primCache.put(type, arr);
+    return arr;
+  }
+
+  /**
+   * Returns the number of dimensions used by arrays
+   * of this type.
+   *
+   * @return the number of dimensions.
+   */
+  public int getDimension()
+  {
+    return dimension;
+  }
+
+  /**
+   * Returns the open type descriptor which describes
+   * the type of the elements of this array type.
+   *
+   * @return the type of the elements.
+   */
+  public OpenType<?> getElementOpenType()
+  {
+    return elementType;
+  }
+
+  /**
+   * <p>
+   * Returns the hash code of the array type.
+   * This is computed as the sum of the hash code of the
+   * element type together with the number of dimensions
+   * the array has and the primitive array flag.  These
+   * are the same elements of the type that are compared as
+   * part of the {@link #equals(java.lang.Object)} method,
+   * thus ensuring that the hashcode is compatible with the
+   * equality test.
+   * </p>
+   * <p>
+   * As instances of this class are immutable, the hash code
+   * is computed just once for each instance and reused
+   * throughout its life.
+   * </p>
+   *
+   * @return the hash code of this instance.
+   */
+  public int hashCode()
+  {
+    if (hashCode == null)
+      hashCode = Integer.valueOf(dimension +
+                                 elementType.hashCode() +
+                                 Boolean.valueOf(primitiveArray).hashCode());
+    return hashCode.intValue();
+  }
+
+  /**
+   * Returns true if this instance represents an array of
+   * a primitive type.
+   *
+   * @return true if the array is of a primitive type.
+   */
+  public boolean isPrimitiveArray()
+  {
+    return primitiveArray;
+  }
+
+  /**
+   * <p>
+   * Returns true if the specified object is a member of this
+   * array type.  The object is judged to be so if it is
+   * non-null, an array and one of the following two conditions
+   * holds:
+   * </p>
+   * <ul>
+   * <li>This {@link ArrayType} instance has a {@link SimpleType}
+   * as its element type.  Thus, the object must have the same
+   * class name as that returned by {@link SimpleType#getClassName()}
+   * for this class.</li>
+   * <li>This {@link ArrayType} instance has a {@link CompositeType}
+   * or a {@link TabularType} as its element type.  Thus, the object
+   * must be assignable to such an array, and have elements which
+   * are either null or valid values for the element type.</li>
+   * </ul>
+   *
+   * @param obj the object to test for membership.
+   * @return true if the object is a member of this type.
+   */
+  public boolean isValue(Object obj)
+  {
+    if (obj == null)
+      return false;
+    Class<?> objClass = obj.getClass();
+    if (!(objClass.isArray()))
+      return false;
+    if (elementType instanceof SimpleType)
+      return getClassName().equals(objClass.getName());
+    Class<?> elementClass = null;
+    try
+      {
+        elementClass = Class.forName(getClassName());
+      }
+    catch (ClassNotFoundException e)
+      {
+        throw new IllegalStateException("The array type's element " +
+                                        "class could not be found.", e);
+      }
+    if (!(elementClass.isAssignableFrom(objClass)))
+      return false;
+    for (int a = 0; a < Array.getLength(obj); ++a)
+      {
+        Object elem = Array.get(obj, a);
+        if (elem != null &&
+            (!(elementType.isValue(elem))))
+          return false;
+      }
+    return true;
+  }
+
+  /**
+   * <p>
+   * Returns a textual representation of this instance.  This
+   * is constructed using the class name
+   * (<code>javax.management.openmbean.ArrayType</code>)
+   * and each element of the instance which is relevant to
+   * the definition of {@link equals(java.lang.Object)} and
+   * {@link hashCode()} (i.e. the type name, the number of
+   * dimensions and the element type).
+   * </p>
+   * <p>
+   * As instances of this class are immutable, the return value
+   * is computed just once for each instance and reused
+   * throughout its life.
+   * </p>
+   *
+   * @return a @link{java.lang.String} instance representing
+   *         the instance in textual form.
+   */
+  public String toString()
+  {
+    if (string == null)
+      string = getClass().getName()
+        + "[name=" + getTypeName()
+        + ", dimension=" + dimension
+        + ", elementType=" + elementType
+        + ", primitiveArray=" + primitiveArray
+        + "]";
+    return string;
+  }
+
+}