iiometadatanode.java

gcc的组建

/* IIOMetadataNode.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 java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.TypeInfo;
import org.w3c.dom.UserDataHandler;
import javax.imageio.metadata.IIOMetadataFormatImpl.IIOMetadataNodeAttr;

public class IIOMetadataNode
  implements Element, NodeList
{
  private String name;
  private HashMap attrs = new HashMap();
  private List children = new ArrayList();
  private IIOMetadataNode parent;
  private Object obj;

  /**
   * Simple NamedNodeMap class for IIOMetadataNode.
   *
   * @author jlquinn
   */
  private class IIONamedNodeMap implements NamedNodeMap
  {
    HashMap attrs;

    /**
     * @param attrs
     * @param node
     */
    public IIONamedNodeMap(HashMap attrs)
    {
      this.attrs = attrs;
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#getNamedItem(java.lang.String)
     */
    public Node getNamedItem(String name)
    {
      return (Node)attrs.get(name);
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#setNamedItem(org.w3c.dom.Node)
     */
    public Node setNamedItem(Node arg) throws DOMException
    {
      if (arg instanceof IIOMetadataNodeAttr)
        {
          IIOMetadataNodeAttr attr = (IIOMetadataNodeAttr) arg;
          // The only code that can successfully do this is in this package.
          if (attr.owner != null)
            throw new DOMException(DOMException.INUSE_ATTRIBUTE_ERR, "");
          return (Node)attrs.put(attr.name, attr);
        }
      // Anything else gets treated as an invalid op.
      throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, "");
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#removeNamedItem(java.lang.String)
     */
    public Node removeNamedItem(String name) throws DOMException
    {
      return (Node)attrs.remove(name);
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#item(int)
     */
    public Node item(int index)
    {
      return (Node)attrs.values().toArray()[index];
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#getLength()
     */
    public int getLength()
    {
      return attrs.size();
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#getNamedItemNS(java.lang.String, java.lang.String)
     */
    public Node getNamedItemNS(String namespaceURI, String localName)
    {
      return getNamedItem(localName);
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#setNamedItemNS(org.w3c.dom.Node)
     */
    public Node setNamedItemNS(Node arg) throws DOMException
    {
      return setNamedItem(arg);
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NamedNodeMap#removeNamedItemNS(java.lang.String, java.lang.String)
     */
    public Node removeNamedItemNS(String namespaceURI, String localName)
      throws DOMException
    {
      return removeNamedItem(localName);
    }
  }

  /**
   * Simple NodeList implementation for IIOMetadataNode.
   *
   * @author jlquinn
   *
   */
  private class IIONodeList implements NodeList
  {
    List children = new ArrayList();
  
    /* (non-Javadoc)
     * @see org.w3c.dom.NodeList#item(int)
     */
    public Node item(int index)
    {
      return (index < children.size()) ? (Node)children.get(index) : null;
    }

    /* (non-Javadoc)
     * @see org.w3c.dom.NodeList#getLength()
     */
    public int getLength()
    {
      return children.size();
    }
  }

  public IIOMetadataNode()
  {
    // Do nothing here.
  }
  
  public IIOMetadataNode(String nodename)
  {
    name = nodename;
  }

  public Object getUserObject()
  {
    return obj;
  }

  public void setUserObject(Object o)
  {
    obj = o;
  }
  
  public short compareDocumentPosition(Node other)
    throws DOMException
  {
    return Element.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC;
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getAttribute(java.lang.String)
   */
  public String getAttribute(String name)
  {
    Attr anode = (Attr) attrs.get(name);
    return anode != null ? anode.getValue() : null;
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getAttributeNode(java.lang.String)
   */
  public Attr getAttributeNode(String name)
  {
    String val = getAttribute(name);
    if (val != null)
      return new IIOMetadataNodeAttr(this, name, val);
    return null;
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getAttributeNodeNS(java.lang.String, java.lang.String)
   */
  public Attr getAttributeNodeNS(String namespaceURI, String localName)
  {
    return getAttributeNode(localName);
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getAttributeNS(java.lang.String, java.lang.String)
   */
  public String getAttributeNS(String namespaceURI, String localName)
  {
    return getAttribute(localName);
  }

  public String getBaseURI()
  {
    return null;
  }

  // Recursive function for assembling a node list.
  private void getElementsRecurse(IIONodeList list, String name)
  {
    for (int i=0; i < children.size(); i++)
    {
      if (((Node)children.get(i)).getNodeName().equals(name))
        list.children.add(children.get(i));
      getElementsRecurse(list, name);
    }
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getElementsByTagName(java.lang.String)
   */
  public NodeList getElementsByTagName(String name)
  {
    IIONodeList list = new IIONodeList();
    getElementsRecurse(list, name);
    return list;
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getElementsByTagNameNS(java.lang.String, java.lang.String)
   */
  public NodeList getElementsByTagNameNS(String namespaceURI, String localName)
  {
    IIONodeList list = new IIONodeList();
    getElementsRecurse(list, name);
    return list;
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#getTagName()
   */
  public String getTagName()
  {
    return name;
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#hasAttribute(java.lang.String)
   */
  public boolean hasAttribute(String name)
  {
    return attrs.containsKey(name);
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#hasAttributeNS(java.lang.String, java.lang.String)
   */
  public boolean hasAttributeNS(String namespaceURI, String localName)
  {
    return attrs.containsKey(localName);
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#removeAttribute(java.lang.String)
   */
  public void removeAttribute(String name)
  {
    attrs.remove(name);
  }

  /* (non-Javadoc)
   * @see org.w3c.dom.Element#removeAttributeNode(org.w3c.dom.Attr)
   */
  public Attr removeAttributeNode(Attr oldAttr)
  {
    return (Attr)attrs.remove(oldAttr.getName());
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#removeAttributeNS(java.lang.String, java.lang.String)
   */
  public void removeAttributeNS(String namespaceURI, String localName)
  {
    removeAttribute(localName);
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#setAttribute(java.lang.String, java.lang.String)
   */
  public void setAttribute(String name, String value)
  {
    Attr attr = (Attr) getAttributeNode(name);
    if (attr != null)
      attr.setValue(value);
    else
      attrs.put(name, new IIOMetadataNodeAttr(this, name, value));
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#setAttributeNode(org.w3c.dom.Attr)
   */
  public Attr setAttributeNode(Attr newAttr)
  {
    return (Attr)attrs.put(newAttr.getName(), newAttr);
  }
  
  /* (non-Javadoc)
   * @see org.w3c.dom.Element#setAttributeNodeNS(org.w3c.dom.Attr)
   */
  public Attr setAttributeNodeNS(Attr newAttr)