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diff --git a/libjava/classpath/javax/management/openmbean/OpenMBeanAttributeInfoSupport.java b/libjava/classpath/javax/management/openmbean/OpenMBeanAttributeInfoSupport.java
new file mode 100644
index 000000000..098f72e71
--- /dev/null
+++ b/libjava/classpath/javax/management/openmbean/OpenMBeanAttributeInfoSupport.java
@@ -0,0 +1,547 @@
+/* OpenMBeanAttributeInfoSupport.java -- Open typed info about an attribute.
+   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.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.management.MBeanAttributeInfo;
+
+/**
+ * Describes an attribute of an open management bean.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.5
+ */
+public class OpenMBeanAttributeInfoSupport
+  extends MBeanAttributeInfo
+  implements OpenMBeanAttributeInfo
+{
+
+  /**
+   * Compatible with JDK 1.5
+   */
+  private static final long serialVersionUID = -4867215622149721849L;
+
+  /**
+   * The open type of the attribute.
+   */
+  private OpenType<?> openType;
+
+  /**
+   * The default value of the attribute (may be <code>null</code>).
+   */
+  private Object defaultValue;
+
+  /**
+   * The possible legal values of the attribute (may be <code>null</code>).
+   */
+  private Set<?> legalValues;
+
+  /**
+   * The minimum value of the attribute (may be <code>null</code>).
+   */
+  private Comparable<?> minValue;
+
+  /**
+   * The maximum value of the attribute (may be <code>null</code>).
+   */
+  private Comparable<?> maxValue;
+
+  /**
+   * The hash code of this instance.
+   */
+  private transient Integer hashCode;
+
+  /**
+   * The <code>toString()</code> result of this instance.
+   */
+  private transient String string;
+
+  /**
+   * Constructs a new {@link OpenMBeanAttributeInfo} using the
+   * specified name, description, open type and access properties.
+   * The name, description and open type may not be <code>null</code>
+   * and the name and description may not be equal to the empty
+   * string.
+   *
+   * @param name the name of the attribute.
+   * @param desc a description of the attribute.
+   * @param type the open type of the attribute.
+   * @param isReadable true if the attribute's value can be read.
+   * @param isWritable true if the attribute's value can be changed.
+   * @param isIs true if the attribute uses an accessor of the form isXXX.
+   * @throws IllegalArgumentException if the name, description or
+   *                                  open type are <code>null</code>
+   *                                  or the name or description are
+   *                                  the empty string.
+   */
+  public OpenMBeanAttributeInfoSupport(String name, String desc, OpenType<?> type,
+                                       boolean isReadable, boolean isWritable,
+                                       boolean isIs)
+  {
+    super(name, type == null ? null : type.getClassName(), desc, isReadable,
+          isWritable, isIs);
+    if (name == null)
+      throw new IllegalArgumentException("The name may not be null.");
+    if (desc == null)
+      throw new IllegalArgumentException("The description may not be null.");
+    if (type == null)
+      throw new IllegalArgumentException("The type may not be null.");
+    if (name.length() == 0)
+      throw new IllegalArgumentException("The name may not be the empty string.");
+    if (desc.length() == 0)
+      throw new IllegalArgumentException("The description may not be the " +
+                                         "empty string.");
+  }
+
+  /**
+   * Constructs a new {@link OpenMBeanAttributeInfo} using the
+   * specified name, description, open type and default value.  The
+   * name, description and open type cannot be <code>null</code> and
+   * the name and description may not be equal to the empty string.
+   * The default value may be <code>null</code>.  If non-null, it must
+   * be a valid value of the given open type.  Default values are not
+   * applicable to the open types, {@link ArrayType} and {@link
+   * TabularType}.
+   *
+   * @param name the name of the attribute.
+   * @param desc a description of the attribute.
+   * @param type the open type of the attribute.
+   * @param isReadable true if the attribute's value can be read.
+   * @param isWritable true if the attribute's value can be changed.
+   * @param isIs true if the attribute uses an accessor of the form isXXX.
+   * @param defaultValue the default value of the attribute.
+   * @throws IllegalArgumentException if the name, description or
+   *                                  open type are <code>null</code>
+   *                                  or the name or description are
+   *                                  the empty string.
+   * @throws OpenDataException if <code>defaultValue<code> is non-null
+   *                           and is either not a value of the given
+   *                           open type or the open type is an instance
+   *                           of {@link ArrayType} or {@link TabularType}.
+   */
+  public <T> OpenMBeanAttributeInfoSupport(String name, String desc, OpenType<T> type,
+                                           boolean isReadable, boolean isWritable,
+                                           boolean isIs, T defaultValue)
+    throws OpenDataException
+  {
+    this(name, desc, type, isReadable, isWritable, isIs, defaultValue, null);
+  }
+
+  /**
+   * <p>
+   * Constructs a new {@link OpenMBeanAttributeInfo} using the
+   * specified name, description, open type, access properties,
+   * default, maximum and minimum values.  The name, description
+   * and open type cannot be <code>null</code> and the name and
+   * description may not be equal to the empty string.  The
+   * default, maximum and minimum values may be <code>null</code>.
+   * The following conditions apply when the attributes mentioned
+   * are non-null:
+   * </p>
+   * <ul>
+   * <li>The values must be valid values for the given open type.</li>
+   * <li>Default values are not applicable to the open types, {@link
+   * ArrayType} and {@link TabularType}.</li>
+   * <li>The minimum value must be smaller than or equal to the maximum value
+   * (literally, <code>minValue.compareTo(maxValue) <= 0</code>.</li>
+   * <li>The minimum value must be smaller than or equal to the default value
+   * (literally, <code>minValue.compareTo(defaultValue) <= 0</code>.</li>
+   * <li>The default value must be smaller than or equal to the maximum value
+   * (literally, <code>defaultValue.compareTo(maxValue) <= 0</code>.</li>
+   * </ul>
+   *
+   * @param name the name of the attribute.
+   * @param desc a description of the attribute.
+   * @param type the open type of the attribute.
+   * @param isReadable true if the attribute's value can be read.
+   * @param isWritable true if the attribute's value can be changed.
+   * @param isIs true if the attribute uses an accessor of the form isXXX.
+   * @param defaultValue the default value of the attribute, or <code>null</code>.
+   * @param minimumValue the minimum value of the attribute, or <code>null</code>.
+   * @param maximumValue the maximum value of the attribute, or <code>null</code>.
+   * @throws IllegalArgumentException if the name, description or
+   *                                  open type are <code>null</code>
+   *                                  or the name or description are
+   *                                  the empty string.
+   * @throws OpenDataException if any condition in the list above is broken.
+   */
+  @SuppressWarnings("unchecked")
+  public <T> OpenMBeanAttributeInfoSupport(String name, String desc, OpenType<T> type,
+                                           boolean isReadable, boolean isWritable,
+                                           boolean isIs, T defaultValue,
+                                           Comparable<T> minimumValue,
+                                           Comparable<T> maximumValue)
+    throws OpenDataException
+  {
+    this(name, desc, type, isReadable, isWritable, isIs);
+    if (defaultValue != null && !(type.isValue(defaultValue)))
+      throw new OpenDataException("The default value is not a member of the " +
+                                  "open type given.");
+    if (minimumValue != null && !(type.isValue(minimumValue)))
+      throw new OpenDataException("The minimum value is not a member of the " +
+                                  "open type given.");
+    if (maximumValue != null && !(type.isValue(maximumValue)))
+      throw new OpenDataException("The maximum value is not a member of the " +
+                                  "open type given.");
+    if (defaultValue != null && (type instanceof ArrayType ||
+                                 type instanceof TabularType))
+      throw new OpenDataException("Default values are not applicable for " +
+                                  "array or tabular types.");
+    if (minimumValue != null && maximumValue != null
+        && minimumValue.compareTo((T) maximumValue) > 0)
+      throw new OpenDataException("The minimum value is greater than the " +
+                                  "maximum.");
+    if (minimumValue != null && defaultValue != null
+        && minimumValue.compareTo(defaultValue) > 0)
+      throw new OpenDataException("The minimum value is greater than the " +
+                                  "default.");
+    if (defaultValue != null && maximumValue != null
+        && maximumValue.compareTo(defaultValue) < 0)
+      throw new OpenDataException("The default value is greater than the " +
+                                  "maximum.");
+
+    openType = type;
+    this.defaultValue = defaultValue;
+    minValue = minimumValue;
+    maxValue = maximumValue;
+  }
+
+  /**
+   * <p>
+   * Constructs a new {@link OpenMBeanAttributeInfo} using the
+   * specified name, description, open type, access properties, default
+   * value and set of legal values.  The name, description and open type
+   * cannot be <code>null</code> and the name and description may not be
+   * equal to the empty string.  The default, maximum and minimum values
+   * may be <code>null</code>.  The following conditions apply when the
+   * attributes mentioned are non-null:
+   * </p>
+   * <ul>
+   * <li>The default value and each of the legal values must be a valid
+   * value for the given open type.</li>
+   * <li>Default and legal values are not applicable to the open types, {@link
+   * ArrayType} and {@link TabularType}.</li>
+   * <li>The default value is not in the set of legal values.</li>
+   * </ul>
+   * <p>
+   * The legal values are copied from the array into a unmodifiable set,
+   * so future modifications to the array have no effect.
+   * </p>
+   *
+   * @param name the name of the attribute.
+   * @param desc a description of the attribute.
+   * @param type the open type of the attribute.
+   * @param isReadable true if the attribute's value can be read.
+   * @param isWritable true if the attribute's value can be changed.
+   * @param isIs true if the attribute uses an accessor of the form isXXX.
+   * @param defaultValue the default value of the attribute, or <code>null</code>.
+   * @param legalValues the legal values of the attribute.  May be
+   *                    <code>null</code> or an empty array.
+   * @throws IllegalArgumentException if the name, description or
+   *                                  open type are <code>null</code>
+   *                                  or the name or description are
+   *                                  the empty string.
+   * @throws OpenDataException if any condition in the list above is broken.
+   */
+  public <T> OpenMBeanAttributeInfoSupport(String name, String desc, OpenType<T> type,
+                                           boolean isReadable, boolean isWritable,
+                                           boolean isIs, T defaultValue,
+                                           T[] legalValues)
+    throws OpenDataException
+  {
+    this(name, desc, type, isReadable, isWritable, isIs);
+    if (defaultValue != null && !(type.isValue(defaultValue)))
+      throw new OpenDataException("The default value is not a member of the " +
+                                  "open type given.");
+    if (defaultValue != null && (type instanceof ArrayType ||
+                                 type instanceof TabularType))
+      throw new OpenDataException("Default values are not applicable for " +
+                                  "array or tabular types.");
+    if (legalValues != null && (type instanceof ArrayType ||
+                                type instanceof TabularType))
+      throw new OpenDataException("Legal values are not applicable for " +
+                                  "array or tabular types.");
+    if (legalValues != null && legalValues.length > 0)
+      {
+        Set<T> lv = new HashSet<T>(legalValues.length);
+        for (int a = 0; a < legalValues.length; ++a)
+          {
+            if (legalValues[a] != null &&
+                !(type.isValue(legalValues[a])))
+              throw new OpenDataException("The legal value, "
+                                          + legalValues[a] +
+                                          "is not a member of the " +
+                                          "open type given.");
+            lv.add(legalValues[a]);
+          }
+        if (defaultValue != null && !(lv.contains(defaultValue)))
+          throw new OpenDataException("The default value is not in the set " +
+                                      "of legal values.");
+        this.legalValues = Collections.unmodifiableSet(lv);
+      }
+    openType = type;
+    this.defaultValue = defaultValue;
+  }
+
+  /**
+   * Compares this attribute with the supplied object.  This returns
+   * true iff the object is an instance of {@link OpenMBeanAttributeInfo}
+   * with an equal name and open type and the same default, minimum,
+   * maximum and legal values and the same access properties.
+   *
+   * @param obj the object to compare.
+   * @return true if the object is a {@link OpenMBeanAttributeInfo}
+   *         instance,
+   *         <code>name.equals(object.getName())</code>,
+   *         <code>openType.equals(object.getOpenType())</code>,
+   *         <code>isRead == object.isReadable()</code>,
+   *         <code>isWrite == object.isWritable()</code>,
+   *         <code>isIs == object.isIs()</code>,
+   *         <code>defaultValue.equals(object.getDefaultValue())</code>,
+   *         <code>minValue.equals(object.getMinValue())</code>,
+   *         <code>maxValue.equals(object.getMaxValue())</code>,
+   *         and <code>legalValues.equals(object.getLegalValues())</code>.
+   */
+  public boolean equals(Object obj)
+  {
+    if (!(obj instanceof OpenMBeanAttributeInfo))
+      return false;
+    OpenMBeanAttributeInfo o = (OpenMBeanAttributeInfo) obj;
+    return getName().equals(o.getName()) &&
+      openType.equals(o.getOpenType()) &&
+      isReadable() == o.isReadable() &&
+      isWritable() == o.isWritable() &&
+      isIs() == o.isIs() &&
+      (defaultValue == null ? o.getDefaultValue() == null :
+       defaultValue.equals(o.getDefaultValue())) &&
+      (minValue == null ? o.getMinValue() == null :
+       minValue.equals(o.getMinValue())) &&
+      (maxValue == null ? o.getMaxValue() == null :
+       maxValue.equals(o.getMaxValue())) &&
+      (legalValues == null ? o.getLegalValues() == null :
+       legalValues.equals(o.getLegalValues()));
+  }
+
+  /**
+   * Returns the default value of this attribute, or <code>null</code>
+   * if there is no default value.
+   *
+   * @return the default value of the attribute, or <code>null</code>
+   *         if there is no default.
+   */
+  public Object getDefaultValue()
+  {
+    return defaultValue;
+  }
+
+  /**
+   * Returns a {@link java.util.Set} enumerating the legal values
+   * of this attribute, or <code>null</code> if no such limited
+   * set exists for this attribute.
+   *
+   * @return a set of legal values, or <code>null</code> if no such
+   *         set exists.
+   */
+  public Set<?> getLegalValues()
+  {
+    return legalValues;
+  }
+
+  /**
+   * Returns the maximum value of this attribute, or <code>null</code>
+   * if there is no maximum.
+   *
+   * @return the maximum value, or <code>null</code> if none exists.
+   */
+  public Comparable<?> getMaxValue()
+  {
+    return maxValue;
+  }
+
+  /**
+   * Returns the minimum value of this attribute, or <code>null</code>
+   * if there is no minimum.
+   *
+   * @return the minimum value, or <code>null</code> if none exists.
+   */
+  public Comparable<?> getMinValue()
+  {
+    return minValue;
+  }
+
+  /**
+   * Returns the open type instance which represents the type of this
+   * attribute.
+   *
+   * @return the open type of this attribute.
+   */
+  public OpenType<?> getOpenType()
+  {
+    return openType;
+  }
+
+  /**
+   * Returns true if this attribute has a default value
+   * (i.e. the value is non-null).
+   *
+   * @return true if this attribute has a default.
+   */
+  public boolean hasDefaultValue()
+  {
+    return defaultValue != null;
+  }
+
+  /**
+   * <p>
+   * Returns the hashcode of the attribute information as the sum of
+   * the hashcodes of the name, open type, default value, maximum
+   * value, minimum value and the set of legal values.
+   * </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 hashcode of the attribute information.
+   */
+  public int hashCode()
+  {
+    if (hashCode == null)
+      hashCode = Integer.valueOf(getName().hashCode() +
+                                 openType.hashCode() +
+                                 Boolean.valueOf(isReadable()).hashCode() +
+                                 (2 *
+                                  Boolean.valueOf(isWritable()).hashCode()) +
+                                 (4 * Boolean.valueOf(isIs()).hashCode()) +
+                                 (defaultValue == null ? 0 :
+                                  defaultValue.hashCode()) +
+                                 (minValue == null ? 0 :
+                                  minValue.hashCode()) +
+                                 (maxValue == null ? 0 :
+                                  maxValue.hashCode()) +
+                                 (legalValues == null ? 0 :
+                                  legalValues.hashCode()));
+    return hashCode.intValue();
+  }
+
+  /**
+   * Returns true if there is a set of legal values for this
+   * attribute (i.e. the value is non-null).
+   *
+   * @return true if a set of legal values exists for this
+   *         attribute.
+   */
+  public boolean hasLegalValues()
+  {
+    return legalValues != null;
+  }
+
+  /**
+   * Returns true if there is a maximum value for this attribute
+   * (i.e. the value is non-null).
+   *
+   * @return true if a maximum value exists for this attribute.
+   */
+  public boolean hasMaxValue()
+  {
+    return maxValue != null;
+  }
+
+  /**
+   * Returns true if there is a minimum value for this attribute.
+   * (i.e. the value is non-null).
+   *
+   * @return true if a minimum value exists for this attribute.
+   */
+  public boolean hasMinValue()
+  {
+    return minValue != null;
+  }
+
+  /**
+   * Returns true if the specified object is a valid value for
+   * this attribute.
+   *
+   * @param obj the object to test.
+   * @return true if <code>obj</code> is a valid value for this
+   *         attribute.
+   */
+  public boolean isValue(Object obj)
+  {
+    return openType.isValue(obj);
+  }
+
+  /**
+   * <p>
+   * Returns a textual representation of this instance.  This
+   * is constructed using the class name
+   * (<code>javax.management.openmbean.OpenMBeanAttributeInfo</code>)
+   * along with the name, open type, access properties, default,
+   * minimum, maximum  and legal values of the attribute.
+   * </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=" + getName()
+        + ",openType=" + openType
+        + ",isReadable=" + isReadable()
+        + ",isWritable=" + isWritable()
+        + ",isIs=" + isIs()
+        + ",defaultValue=" + defaultValue
+        + ",minValue=" + minValue
+        + ",maxValue=" + maxValue
+        + ",legalValues=" + legalValues
+        + "]";
+    return string;
+  }
+
+}