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1 files changed, 881 insertions, 0 deletions

diff --git a/libjava/classpath/javax/imageio/metadata/IIOMetadataFormatImpl.java b/libjava/classpath/javax/imageio/metadata/IIOMetadataFormatImpl.java
new file mode 100644
index 000000000..efea723f9
--- /dev/null
+++ b/libjava/classpath/javax/imageio/metadata/IIOMetadataFormatImpl.java
@@ -0,0 +1,881 @@
+/* IIOMetadataFormatImpl.java --
+   Copyright (C) 2004  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.imageio.metadata;
+
+import org.w3c.dom.Attr;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.NodeList;
+import org.w3c.dom.TypeInfo;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.List;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import java.util.MissingResourceException;
+import javax.imageio.ImageTypeSpecifier;
+
+public abstract class IIOMetadataFormatImpl implements IIOMetadataFormat
+{
+  /**
+   * The standard metadata format name constant set to
+   * "javax_imageio_1.0".
+   */
+  public static final String standardMetadataFormatName = "javax_imageio_1.0";
+
+  private String rootName;
+
+  // These maps assume that each element name is unique.
+
+  private Map nodes = new HashMap();
+
+  // A mapping from element name to child policy.
+  private Map childPolicies = new HashMap();
+
+  // A mapping from element name to the permissible number of
+  // children.  Values in this map are length-two integer arrays; the
+  // first index is the minimum bound, the second index is the maximum
+  // bound.
+  private Map childRanges = new HashMap();
+
+  private String resourceBaseName;
+
+  // Package-private so that it may be used in IIOMetadataNode.
+  static class IIOMetadataNodeAttr extends IIOMetadataNode
+    implements Attr
+  {
+    protected Element owner;
+    protected String name;
+    protected int dataType;
+    protected boolean required;
+    protected String defaultValue;
+
+    public IIOMetadataNodeAttr (Element owner,
+                                String name,
+                                String defaultValue)
+    {
+      this (owner, name, IIOMetadataFormat.DATATYPE_STRING,
+            true, defaultValue);
+    }
+
+    public IIOMetadataNodeAttr (Element owner,
+                                String name,
+                                int dataType,
+                                boolean required,
+                                String defaultValue)
+    {
+      this.owner = owner;
+      this.name = name;
+      this.dataType = dataType;
+      this.required = required;
+      this.defaultValue = defaultValue;
+    }
+
+    public String getName ()
+    {
+      return name;
+    }
+
+    public Element getOwnerElement ()
+    {
+      return owner;
+    }
+
+    public int getDataType ()
+    {
+      return dataType;
+    }
+
+    public TypeInfo getSchemaTypeInfo ()
+    {
+      return null;
+    }
+
+    public boolean getSpecified ()
+    {
+      return false;
+    }
+
+    public String getValue ()
+    {
+      return defaultValue;
+    }
+
+    public boolean isId()
+    {
+      return false;
+    }
+
+    public void setValue (String value)
+    {
+    }
+
+    // new methods
+
+    public boolean isRequired ()
+    {
+      return required;
+    }
+  }
+
+  private class IIOMetadataNodeAttrEnumerated extends IIOMetadataNodeAttr
+  {
+    protected List enumeratedValues;
+
+    public IIOMetadataNodeAttrEnumerated (Element owner,
+                                          String name,
+                                          int dataType,
+                                          boolean required,
+                                          String defaultValue,
+                                          List enumeratedValues)
+    {
+      super (owner, name, dataType, required, defaultValue);
+      this.enumeratedValues = new ArrayList (enumeratedValues);
+    }
+
+    public Object[] getEnumerations ()
+    {
+      return enumeratedValues.toArray ();
+    }
+  }
+
+  private class IIOMetadataNodeAttrBounded extends IIOMetadataNodeAttr
+  {
+    protected String minValue;
+    protected String maxValue;
+    protected boolean minInclusive;
+    protected boolean maxInclusive;
+
+    public IIOMetadataNodeAttrBounded (Element owner,
+                                       String name,
+                                       int dataType,
+                                       boolean required,
+                                       String defaultValue,
+                                       String minValue,
+                                       String maxValue,
+                                       boolean minInclusive,
+                                       boolean maxInclusive)
+    {
+      super (owner, name, dataType, required, defaultValue);
+      this.minValue = minValue;
+      this.maxValue = maxValue;
+      this.minInclusive = minInclusive;
+      this.maxInclusive = maxInclusive;
+    }
+
+    public String getMinValue ()
+    {
+      return minValue;
+    }
+
+    public String getMaxValue ()
+    {
+      return maxValue;
+    }
+  }
+
+  private class IIOMetadataNodeAttrList extends IIOMetadataNodeAttr
+  {
+    protected int listMinLength;
+    protected int listMaxLength;
+
+    public IIOMetadataNodeAttrList (Element owner,
+                                    String name,
+                                    int dataType,
+                                    boolean required,
+                                    int listMinLength,
+                                    int listMaxLength)
+    {
+      super (owner, name, dataType, required, null);
+      this.listMinLength = listMinLength;
+      this.listMaxLength = listMaxLength;
+    }
+
+    public int getListMinLength ()
+    {
+      return listMinLength;
+    }
+
+    public int getListMaxLength ()
+    {
+      return listMaxLength;
+    }
+  }
+
+  private class NodeObject
+  {
+    protected Element owner;
+    protected Class classType;
+    protected boolean required;
+    protected Object defaultValue;
+    protected int valueType;
+
+    public NodeObject (Element owner,
+                       Class classType,
+                       boolean required,
+                       Object defaultValue)
+    {
+      this.owner = owner;
+      this.classType = classType;
+      this.required = required;
+      this.defaultValue = defaultValue;
+      valueType = IIOMetadataFormat.VALUE_ARBITRARY;
+    }
+
+    public int getValueType ()
+    {
+      return valueType;
+    }
+
+    public Class getClassType ()
+    {
+      return classType;
+    }
+
+    public Element getOwnerElement ()
+    {
+      return owner;
+    }
+
+    public Object getDefaultValue ()
+    {
+      return defaultValue;
+    }
+
+    public boolean isRequired ()
+    {
+      return required;
+    }
+  }
+
+  private class NodeObjectEnumerated extends NodeObject
+  {
+    protected List enumeratedValues;
+
+    public NodeObjectEnumerated (Element owner,
+                                 Class classType,
+                                 boolean required,
+                                 Object defaultValue,
+                                 List enumeratedValues)
+    {
+      super (owner, classType, false, defaultValue);
+      this.enumeratedValues = enumeratedValues;
+      valueType = IIOMetadataFormat.VALUE_ENUMERATION;
+    }
+
+    public Object[] getEnumerations ()
+    {
+      return enumeratedValues.toArray();
+    }
+  }
+
+  private class NodeObjectBounded extends NodeObject
+  {
+    protected Comparable minValue;
+    protected Comparable maxValue;
+    protected boolean minInclusive;
+    protected boolean maxInclusive;
+
+    public NodeObjectBounded (Element owner,
+                              Class classType,
+                              Object defaultValue,
+                              Comparable minValue,
+                              Comparable maxValue,
+                              boolean minInclusive,
+                              boolean maxInclusive)
+    {
+      super (owner, classType, false, defaultValue);
+      this.minValue = minValue;
+      this.maxValue = maxValue;
+      this.minInclusive = minInclusive;
+      this.maxInclusive = maxInclusive;
+      if (minInclusive)
+        {
+          if (maxInclusive)
+            valueType = IIOMetadataFormat.VALUE_RANGE_MIN_MAX_INCLUSIVE;
+          else
+            valueType = IIOMetadataFormat.VALUE_RANGE_MIN_INCLUSIVE;
+        }
+      else
+        {
+          if (maxInclusive)
+            valueType = IIOMetadataFormat.VALUE_RANGE_MAX_INCLUSIVE;
+          else
+            valueType = IIOMetadataFormat.VALUE_RANGE;
+        }
+    }
+
+    public Comparable getMinValue ()
+    {
+      return minValue;
+    }
+
+    public Comparable getMaxValue ()
+    {
+      return maxValue;
+    }
+  }
+
+  private class NodeObjectArray extends NodeObject
+  {
+    protected Integer arrayMinLength;
+    protected Integer arrayMaxLength;
+
+    public NodeObjectArray (Element owner,
+                            Class classType,
+                            int arrayMinLength,
+                            int arrayMaxLength)
+    {
+      super (owner, classType, false, null);
+      this.arrayMinLength = new Integer (arrayMinLength);
+      this.arrayMaxLength = new Integer (arrayMaxLength);
+      valueType = IIOMetadataFormat.VALUE_LIST;
+    }
+
+    public Comparable getArrayMinLength ()
+    {
+      return arrayMinLength;
+    }
+
+    public Comparable getArrayMaxLength ()
+    {
+      return arrayMaxLength;
+    }
+  }
+
+  /**
+   * Construct a blank IIOMetadataFormatImpl with the given root name
+   * and child policy.
+   *
+   * @param rootName the root element name
+   * @param childPolicy the child policy of the root element
+   *
+   * @exception IllegalArgumentException if rootName is null
+   * @exception IllegalArgumentException if childPolicy is
+   * CHILD_POLICY_REPEAT or if childPolicy is not a CHILD_POLICY
+   * constant
+   */
+  public IIOMetadataFormatImpl (String rootName, int childPolicy)
+  {
+    if (rootName == null)
+      throw new IllegalArgumentException ("null argument");
+
+    if (childPolicy < IIOMetadataFormat.CHILD_POLICY_ALL
+        || childPolicy > IIOMetadataFormat.CHILD_POLICY_SOME
+        || childPolicy == IIOMetadataFormat.CHILD_POLICY_REPEAT)
+      throw new IllegalArgumentException ("wrong child policy");
+
+    nodes.put (rootName, new IIOMetadataNode (rootName));
+    childPolicies.put (rootName, new Integer (childPolicy));
+    this.rootName = rootName;
+  }
+
+  /**
+   * Construct a blank IIOMetadataFormatImpl with the given root name,
+   * a child policy of CHILD_POLICY_REPEAT and the given minimum and
+   * maximum limits on the number of root element children.
+   *
+   * @param rootName the root element name
+   * @param minChildren the minimum number of children that this node
+   * can have
+   * @param maxChildren the maximum number of children that this node
+   * can have
+   *
+   * @exception IllegalArgumentException if rootName is null
+   * @exception IllegalArgumentException if minChildren is less than
+   * zero or greater than maxChildren
+   */
+  public IIOMetadataFormatImpl (String rootName,
+                                int minChildren,
+                                int maxChildren)
+  {
+    if (rootName == null)
+      throw new IllegalArgumentException ("null argument");
+
+    if (minChildren < 0 || maxChildren < minChildren)
+      throw new IllegalArgumentException ("invalid min or max children argument");
+
+    nodes.put (rootName, new IIOMetadataNode (rootName));
+    childPolicies.put (rootName, new Integer (IIOMetadataFormat.CHILD_POLICY_REPEAT));
+    childRanges.put (rootName, new int [] { minChildren, maxChildren });
+    this.rootName = rootName;
+  }
+
+  protected void addAttribute (String elementName,
+                               String attrName,
+                               int dataType,
+                               boolean required,
+                               String defaultValue)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    node.setAttributeNode (new IIOMetadataNodeAttr (node,
+                                                    attrName,
+                                                    dataType,
+                                                    required,
+                                                    defaultValue));
+  }
+
+  protected void addAttribute (String elementName,
+                               String attrName,
+                               int dataType,
+                               boolean required,
+                               String defaultValue,
+                               List<String> enumeratedValues)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    node.setAttributeNode (new IIOMetadataNodeAttrEnumerated (node,
+                                                              attrName,
+                                                              dataType,
+                                                              required,
+                                                              defaultValue,
+                                                              enumeratedValues));
+  }
+
+  protected void addAttribute (String elementName,
+                               String attrName,
+                               int dataType,
+                               boolean required,
+                               String defaultValue,
+                               String minValue,
+                               String maxValue,
+                               boolean minInclusive,
+                               boolean maxInclusive)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    node.setAttributeNode (new IIOMetadataNodeAttrBounded (node,
+                                                           attrName,
+                                                           dataType,
+                                                           required,
+                                                           defaultValue,
+                                                           minValue,
+                                                           maxValue,
+                                                           minInclusive,
+                                                           maxInclusive));
+  }
+
+  protected void addAttribute (String elementName,
+                               String attrName,
+                               int dataType,
+                               boolean required,
+                               int listMinLength,
+                               int listMaxLength)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    node.setAttributeNode (new IIOMetadataNodeAttrList (node,
+                                                        attrName,
+                                                        dataType,
+                                                        required,
+                                                        listMinLength,
+                                                        listMaxLength));
+  }
+
+  protected void addBooleanAttribute (String elementName,
+                                      String attrName,
+                                      boolean hasDefaultValue,
+                                      boolean defaultValue)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+
+    List enumeratedValues = new ArrayList();
+    enumeratedValues.add ("TRUE");
+    enumeratedValues.add ("FALSE");
+
+    node.setAttributeNode (new IIOMetadataNodeAttrEnumerated (node,
+                                                              attrName,
+                                                              IIOMetadataFormat.DATATYPE_BOOLEAN,
+                                                              hasDefaultValue,
+                                                              defaultValue ? "TRUE" : "FALSE",
+                                                              enumeratedValues));
+  }
+
+  protected void addChildElement (String elementName, String parentName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (parentName);
+
+    node.appendChild (new IIOMetadataNode (elementName));
+    childPolicies.put (elementName, new Integer (IIOMetadataFormat.CHILD_POLICY_REPEAT));
+  }
+
+  protected void addElement (String elementName, String parentName, int childPolicy)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (parentName);
+
+    node.appendChild (new IIOMetadataNode (elementName));
+    childPolicies.put (elementName, new Integer (childPolicy));
+  }
+
+  protected void addElement (String elementName, String parentName,
+                             int minChildren, int maxChildren)
+  {
+    addChildElement (elementName, parentName);
+    childRanges.put (elementName, new int [] { minChildren, maxChildren });
+  }
+
+  private void addNodeObject (IIOMetadataNode node, NodeObject o)
+  {
+    node.setUserObject (o);
+  }
+
+  private NodeObject getNodeObject (IIOMetadataNode node)
+  {
+    return (NodeObject) node.getUserObject ();
+  }
+
+  private void removeNodeObject (IIOMetadataNode node)
+  {
+    node.setUserObject (null);
+  }
+
+  protected <T> void addObjectValue (String elementName, Class<T> classType,
+                                     boolean required, T defaultValue)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    addNodeObject (node, new NodeObject (node,
+                                         classType,
+                                         required,
+                                         defaultValue));
+  }
+
+  protected <T> void addObjectValue (String elementName, Class<T> classType,
+                                     boolean required, T defaultValue,
+                                     List<? extends T> enumeratedValues)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    addNodeObject (node, new NodeObjectEnumerated (node,
+                                                   classType,
+                                                   required,
+                                                   defaultValue,
+                                                   enumeratedValues));
+  }
+
+  protected <T extends Object & Comparable<? super T>>
+  void addObjectValue (String elementName, Class<T> classType,
+                       T defaultValue,
+                       Comparable<? super T> minValue,
+                       Comparable<? super T> maxValue,
+                       boolean minInclusive,
+                       boolean maxInclusive)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    addNodeObject (node, new NodeObjectBounded (node,
+                                                classType,
+                                                defaultValue,
+                                                minValue,
+                                                maxValue,
+                                                minInclusive,
+                                                maxInclusive));
+  }
+
+  protected void addObjectValue (String elementName, Class<?> classType,
+                                 int arrayMinLength, int arrayMaxLength)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    addNodeObject (node, new NodeObjectArray (node,
+                                              classType,
+                                              arrayMinLength,
+                                              arrayMaxLength));
+  }
+
+  public String getRootName ()
+  {
+    return rootName;
+  }
+
+  protected String getResourceBaseName ()
+  {
+    return resourceBaseName;
+  }
+
+  public static IIOMetadataFormat getStandardFormatInstance ()
+  {
+    // FIXME: populate this with the standard metadata format
+    return new IIOMetadataFormatImpl (standardMetadataFormatName,
+                                      IIOMetadataFormat.CHILD_POLICY_ALL)
+      {
+        public boolean canNodeAppear (String elementName,
+                                      ImageTypeSpecifier specifier)
+        {
+          return true;
+        }
+      };
+  }
+
+  public abstract boolean canNodeAppear (String elementName,
+                                         ImageTypeSpecifier specifier);
+
+  protected void removeAttribute (String elementName,
+                                  String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    node.removeAttribute (attrName);
+  }
+
+  protected void removeElement (String elementName)
+  {
+    nodes.remove (elementName);
+  }
+
+  protected void removeObjectValue (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    removeNodeObject (node);
+  }
+
+  protected void setResourceBaseName (String resourceBaseName)
+  {
+    this.resourceBaseName = resourceBaseName;
+  }
+
+  public int getAttributeDataType (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttr attr = (IIOMetadataNodeAttr) node.getAttributeNode (attrName);
+    return attr.getDataType ();
+  }
+
+  public String getAttributeDefaultValue (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttr attr = (IIOMetadataNodeAttr) node.getAttributeNode (attrName);
+    return attr.getValue();
+  }
+
+  public String getAttributeDescription (String elementName, String attrName, Locale locale)
+  {
+    return getDescription (elementName + "/" + attrName, locale);
+  }
+
+  public String[] getAttributeEnumerations (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttrEnumerated attr =
+      (IIOMetadataNodeAttrEnumerated) node.getAttributeNode (attrName);
+
+    Object[] attrEnums = attr.getEnumerations();
+
+    String[] attrNames = new String[attrEnums.length];
+
+    for (int i = 0; i < attrEnums.length; i++)
+      {
+        attrNames[i] = (String) attrEnums[i];
+      }
+
+    return attrNames;
+  }
+
+  public int getAttributeListMaxLength (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttrList attr =
+      (IIOMetadataNodeAttrList) node.getAttributeNode (attrName);
+    return attr.getListMaxLength();
+  }
+
+  public int getAttributeListMinLength (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttrList attr =
+      (IIOMetadataNodeAttrList) node.getAttributeNode (attrName);
+    return attr.getListMinLength();
+  }
+
+  public String getAttributeMaxValue (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttrBounded attr =
+      (IIOMetadataNodeAttrBounded) node.getAttributeNode (attrName);
+    return attr.getMaxValue();
+  }
+
+  public String getAttributeMinValue (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttrBounded attr =
+      (IIOMetadataNodeAttrBounded) node.getAttributeNode (attrName);
+    return attr.getMinValue();
+  }
+
+  public String[] getAttributeNames (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+
+    NamedNodeMap attrNodes = node.getAttributes();
+
+    String[] attrNames = new String[attrNodes.getLength()];
+
+    for (int i = 0; i < attrNodes.getLength(); i++)
+      {
+        attrNames[i] = attrNodes.item (i).getLocalName();
+      }
+
+    return attrNames;
+  }
+
+  public int getAttributeValueType (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    IIOMetadataNodeAttr attr = (IIOMetadataNodeAttr) node.getAttributeNode (attrName);
+    return attr.getDataType();
+  }
+
+  public String[] getChildNames (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+
+    NodeList childNodes = node.getChildNodes();
+
+    String[] childNames = new String[childNodes.getLength()];
+
+    for (int i = 0; i < childNodes.getLength(); i++)
+      {
+        childNames[i] = childNodes.item (i).getLocalName();
+      }
+
+    return childNames;
+  }
+
+  public int getChildPolicy (String elementName)
+  {
+    return ((Integer) childPolicies.get (elementName)).intValue();
+  }
+
+  private String getDescription (String resourceName, Locale locale)
+  {
+    if (resourceBaseName == null)
+      return null;
+
+    Locale l = locale;
+
+    if (l == null)
+      l = Locale.getDefault();
+
+    ResourceBundle bundle = ResourceBundle.getBundle (resourceBaseName, locale);
+
+    String desc = null;
+
+    if (bundle == null)
+      {
+        try
+          {
+            desc = bundle.getString (resourceName);
+          }
+        catch (MissingResourceException e)
+          {
+            desc = null;
+          }
+      }
+
+    return desc;
+  }
+
+  public String getElementDescription (String elementName, Locale locale)
+  {
+    return getDescription (elementName, locale);
+  }
+
+  public int getElementMaxChildren (String elementName)
+  {
+    return ((int[]) childRanges.get (elementName))[1];
+  }
+
+  public int getElementMinChildren (String elementName)
+  {
+    return ((int[]) childRanges.get (elementName))[0];
+  }
+
+  public int getObjectArrayMaxLength (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((Integer) ((NodeObjectArray) getNodeObject (node)).getArrayMaxLength ()).intValue();
+  }
+
+  public int getObjectArrayMinLength (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((Integer) ((NodeObjectArray) getNodeObject (node)).getArrayMinLength ()).intValue();
+  }
+
+  public Class<?> getObjectClass (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return getNodeObject (node).getClassType ();
+  }
+
+  public Object getObjectDefaultValue (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return getNodeObject (node).getDefaultValue ();
+  }
+
+  public Object[] getObjectEnumerations (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((NodeObjectEnumerated) getNodeObject (node)).getEnumerations ();
+  }
+
+  public Comparable<?> getObjectMaxValue (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((NodeObjectBounded) getNodeObject (node)).getMaxValue ();
+  }
+
+  public Comparable<?> getObjectMinValue (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((NodeObjectBounded) getNodeObject (node)).getMinValue ();
+  }
+
+  public int getObjectValueType (String elementName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    NodeObject n = getNodeObject (node);
+
+    if (n == null)
+      return IIOMetadataFormat.VALUE_NONE;
+    else
+      return n.getValueType ();
+  }
+
+  public boolean isAttributeRequired (String elementName, String attrName)
+  {
+    IIOMetadataNode node = (IIOMetadataNode) nodes.get (elementName);
+    return ((IIOMetadataNodeAttr) node.getAttributeNode (attrName)).isRequired();
+  }
+}