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+/* GnomeNode.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 gnu.xml.libxmlj.dom;
+
+import gnu.java.lang.CPStringBuilder;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.DocumentType;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.w3c.dom.Text;
+import org.w3c.dom.UserDataHandler;
+
+import gnu.xml.libxmlj.util.StandaloneDocumentType;
+
+/**
+ * A DOM node implemented in libxml2.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+class GnomeNode
+ implements Node, Comparable
+{
+
+ /**
+ * Maps document pointers to a map of node pointers to node instances.
+ */
+ static Map instances;
+
+ /**
+ * Retrieves the node instance for the specified node pointer.
+ * This creates a new instance and adds it to the cache if required.
+ * @param doc the document pointer
+ * @param node the node pointer
+ * @param type the node type
+ */
+ static GnomeNode newInstance(final Object doc, final Object node,
+ final int type)
+ {
+ if (doc == null)
+ {
+ throw new NullPointerException("doc");
+ }
+ if (node == null)
+ {
+ throw new NullPointerException("node");
+ }
+ if (instances == null)
+ {
+ instances = new HashMap();
+ }
+ Map docNodes = (Map) instances.get(doc);
+ if (docNodes == null)
+ {
+ docNodes = new HashMap(1024); // TODO review optimal initial capacity
+ instances.put(doc, docNodes);
+ }
+ GnomeNode nodeInstance = (GnomeNode) docNodes.get(node);
+ if (nodeInstance != null)
+ {
+ return nodeInstance; // Return cached version
+ }
+ switch (type)
+ {
+ case ELEMENT_NODE:
+ nodeInstance = new GnomeElement(node);
+ break;
+ case ATTRIBUTE_NODE:
+ nodeInstance = new GnomeAttr(node);
+ break;
+ case TEXT_NODE:
+ nodeInstance = new GnomeText(node);
+ break;
+ case CDATA_SECTION_NODE:
+ nodeInstance = new GnomeCDATASection(node);
+ break;
+ case ENTITY_REFERENCE_NODE:
+ nodeInstance = new GnomeEntityReference(node);
+ break;
+ case ENTITY_NODE:
+ nodeInstance = new GnomeEntity(node);
+ break;
+ case PROCESSING_INSTRUCTION_NODE:
+ nodeInstance = new GnomeProcessingInstruction(node);
+ break;
+ case COMMENT_NODE:
+ nodeInstance = new GnomeComment(node);
+ break;
+ case DOCUMENT_NODE:
+ nodeInstance = new GnomeDocument(node);
+ break;
+ case DOCUMENT_TYPE_NODE:
+ nodeInstance = new GnomeDocumentType(node);
+ break;
+ case DOCUMENT_FRAGMENT_NODE:
+ nodeInstance = new GnomeDocumentFragment(node);
+ break;
+ case NOTATION_NODE:
+ nodeInstance = new GnomeNotation(node);
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown node type: " + type);
+ }
+ docNodes.put(node, nodeInstance);
+ return nodeInstance;
+ }
+
+ /**
+ * Frees the specified document.
+ * This removes all its nodes from the cache.
+ */
+ static void freeDocument(final Object doc)
+ {
+ if (instances == null || doc == null)
+ {
+ return;
+ }
+ instances.remove(doc);
+ //System.out.println("Freed "+instances.remove(doc));
+ }
+
+ /**
+ * xmlNodePtr
+ */
+ final Object id;
+
+ Map userData;
+ Map userDataHandlers;
+
+ GnomeNode(final Object id)
+ {
+ this.id = id;
+ }
+
+ public native String getNodeName();
+
+ public native String getNodeValue()
+ throws DOMException;
+
+ public native void setNodeValue(String nodeValue)
+ throws DOMException;
+
+ public native short getNodeType();
+
+ public native Node getParentNode();
+
+ public NodeList getChildNodes()
+ {
+ return new GnomeNodeList(id);
+ }
+
+ public native Node getFirstChild();
+
+ public native Node getLastChild();
+
+ public native Node getPreviousSibling();
+
+ public native Node getNextSibling();
+
+ public NamedNodeMap getAttributes()
+ {
+ return new GnomeNamedNodeMap(id, 0);
+ }
+
+ public native Document getOwnerDocument();
+
+ public Node insertBefore(Node newChild, Node refChild)
+ throws DOMException
+ {
+ if (newChild instanceof StandaloneDocumentType)
+ {
+ DocumentType dt = (DocumentType) newChild;
+ newChild = ((GnomeDocument) getOwnerDocument())
+ .createDocumentType(dt.getName(), dt.getPublicId(),
+ dt.getSystemId());
+ }
+ if (newChild == null)
+ {
+ throw new GnomeDOMException(DOMException.NOT_FOUND_ERR, null);
+ }
+ if (!(newChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.WRONG_DOCUMENT_ERR, null);
+ }
+ if (refChild == null || !(refChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.NOT_FOUND_ERR, null);
+ }
+ return xmljInsertBefore(newChild, refChild);
+ }
+
+ private native Node xmljInsertBefore(Node newChild, Node refChild)
+ throws DOMException;
+
+ public Node replaceChild(Node newChild, Node oldChild)
+ throws DOMException
+ {
+ if (newChild instanceof StandaloneDocumentType)
+ {
+ DocumentType dt = (DocumentType) newChild;
+ newChild = ((GnomeDocument) getOwnerDocument())
+ .createDocumentType(dt.getName(), dt.getPublicId(),
+ dt.getSystemId());
+ }
+ if (newChild == null)
+ {
+ throw new GnomeDOMException(DOMException.NOT_FOUND_ERR, null);
+ }
+ if (!(newChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.WRONG_DOCUMENT_ERR, newChild.toString());
+ }
+ if (oldChild == null || !(oldChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.NOT_FOUND_ERR, null);
+ }
+ return xmljReplaceChild(newChild, oldChild);
+ }
+
+ private native Node xmljReplaceChild(Node newChild, Node oldChild)
+ throws DOMException;
+
+ public Node removeChild(Node oldChild)
+ throws DOMException
+ {
+ if (!(oldChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.WRONG_DOCUMENT_ERR, null);
+ }
+ return xmljRemoveChild(oldChild);
+ }
+
+ private native Node xmljRemoveChild(Node oldChild)
+ throws DOMException;
+
+ public Node appendChild(Node newChild)
+ throws DOMException
+ {
+ if (newChild instanceof StandaloneDocumentType)
+ {
+ DocumentType dt = (DocumentType) newChild;
+ newChild = ((GnomeDocument) getOwnerDocument())
+ .createDocumentType(dt.getName(), dt.getPublicId(),
+ dt.getSystemId());
+ }
+ if (!(newChild instanceof GnomeNode))
+ {
+ throw new GnomeDOMException(DOMException.WRONG_DOCUMENT_ERR, null);
+ }
+ return xmljAppendChild(newChild);
+ }
+
+ private native Node xmljAppendChild(Node newChild)
+ throws DOMException;
+
+ public native boolean hasChildNodes();
+
+ public Node cloneNode(boolean deep)
+ {
+ Node ret = xmljCloneNode(deep);
+ notifyUserDataHandlers(UserDataHandler.NODE_CLONED, this, ret);
+ return ret;
+ }
+
+ private native Node xmljCloneNode(boolean deep);
+
+ public native void normalize();
+
+ public boolean isSupported(String feature, String version)
+ {
+ return getOwnerDocument().getImplementation()
+ .hasFeature(feature, version);
+ }
+
+ public native String getNamespaceURI();
+
+ public native String getPrefix();
+
+ public native void setPrefix(String prefix)
+ throws DOMException;
+
+ public native String getLocalName();
+
+ public native boolean hasAttributes();
+
+ public int hashCode()
+ {
+ return id.hashCode();
+ }
+
+ public boolean equals(Object other)
+ {
+ if (other == this)
+ {
+ return true;
+ }
+ return (other instanceof GnomeNode &&
+ ((GnomeNode) other).id == id);
+ }
+
+ // DOM Level 3 methods
+
+ public native String getBaseURI();
+
+ public short compareDocumentPosition(Node other)
+ throws DOMException
+ {
+ return (short) compareTo(other);
+ }
+
+ public final int compareTo(Object other)
+ {
+ if (other instanceof GnomeNode)
+ {
+ return xmljCompareTo(other);
+ }
+ return 0;
+ }
+
+ private native int xmljCompareTo(Object other);
+
+ public String getTextContent()
+ throws DOMException
+ {
+ switch (getNodeType())
+ {
+ case ELEMENT_NODE:
+ case ATTRIBUTE_NODE:
+ case ENTITY_NODE:
+ case ENTITY_REFERENCE_NODE:
+ case DOCUMENT_FRAGMENT_NODE:
+ CPStringBuilder buffer = new CPStringBuilder();
+ NodeList children = getChildNodes();
+ int len = children.getLength();
+ for (int i = 0; i < len; i++)
+ {
+ Node child = children.item(i);
+ String textContent = child.getTextContent();
+ if (textContent != null)
+ {
+ buffer.append(textContent);
+ }
+ }
+ return buffer.toString();
+ case TEXT_NODE:
+ case CDATA_SECTION_NODE:
+ case COMMENT_NODE:
+ case PROCESSING_INSTRUCTION_NODE:
+ return getNodeValue();
+ default:
+ return null;
+ }
+ }
+
+ public void setTextContent(String textContent)
+ throws DOMException
+ {
+ switch (getNodeType())
+ {
+ case ENTITY_REFERENCE_NODE:
+ // entity references are read only
+ throw new GnomeDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR,
+ null);
+ case ELEMENT_NODE:
+ case ATTRIBUTE_NODE:
+ case ENTITY_NODE:
+ case DOCUMENT_FRAGMENT_NODE:
+ NodeList children = getChildNodes();
+ int len = children.getLength();
+ for (int i = 0; i < len; i++)
+ {
+ Node child = children.item(i);
+ removeChild(child);
+ }
+ if (textContent != null)
+ {
+ Text text = getOwnerDocument().createTextNode(textContent);
+ appendChild(text);
+ }
+ break;
+ case TEXT_NODE:
+ case CDATA_SECTION_NODE:
+ case COMMENT_NODE:
+ case PROCESSING_INSTRUCTION_NODE:
+ setNodeValue(textContent);
+ break;
+ }
+ }
+
+ public boolean isSameNode(Node other)
+ {
+ return equals(other);
+ }
+
+ public native String lookupPrefix(String namespaceURI);
+
+ public native boolean isDefaultNamespace(String namespaceURI);
+
+ public native String lookupNamespaceURI(String prefix);
+
+ public native boolean isEqualNode(Node arg);
+
+ public Object getFeature(String feature, String version)
+ {
+ return getOwnerDocument().getImplementation()
+ .getFeature(feature, version);
+ }
+
+ public Object setUserData(String key, Object data, UserDataHandler handler)
+ {
+ // TODO handler
+ if (userData == null)
+ {
+ userData = new HashMap();
+ }
+ if (handler != null)
+ {
+ if (userDataHandlers == null)
+ {
+ userDataHandlers = new HashMap();
+ }
+ userDataHandlers.put(key, handler);
+ }
+ return userData.put(key, data);
+ }
+
+ public Object getUserData(String key)
+ {
+ if (userData == null)
+ {
+ return null;
+ }
+ return userData.get(key);
+ }
+
+ void notifyUserDataHandlers(short op, Node src, Node dst)
+ {
+ if (userDataHandlers != null)
+ {
+ for (Iterator i = userDataHandlers.entrySet().iterator(); i.hasNext(); )
+ {
+ Map.Entry entry = (Map.Entry) i.next();
+ String key = (String) entry.getKey();
+ UserDataHandler handler = (UserDataHandler) entry.getValue();
+ Object data = userData.get(key);
+ handler.handle(op, key, data, src, dst);
+ }
+ }
+ }
+
+ public String toString()
+ {
+ CPStringBuilder buffer = new CPStringBuilder(getClass().getName());
+ buffer.append("[nodeName=");
+ buffer.append(getNodeName());
+ buffer.append("]");
+ return buffer.toString();
+ }
+
+}