/*
* eXist Open Source Native XML Database
* Copyright (C) 2000-04, Wolfgang Meier (wolfgang@exist-db.org)
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id$
*/
package org.exist.dom;
import org.exist.Namespaces;
import org.exist.numbering.NodeId;
import org.exist.storage.DBBroker;
import org.exist.storage.Signatures;
import org.exist.util.ByteArrayPool;
import org.exist.util.ByteConversion;
import org.exist.util.UTF8;
import org.exist.util.XMLString;
import org.exist.util.pool.NodePool;
import org.exist.util.serializer.AttrList;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.TypeInfo;
import org.w3c.dom.UserDataHandler;
import java.io.UnsupportedEncodingException;
public class AttrImpl extends NamedNode implements Attr {
public static final int LENGTH_NS_ID = 2; //sizeof short
public static final int LENGTH_PREFIX_LENGTH = 2; //sizeof short
public final static int CDATA = 0;
public final static int ID = 1;
public final static int IDREF = 2;
public final static int IDREFS = 3;
public final static int DEFAULT_ATTRIBUTE_TYPE = CDATA;
protected int attributeType = DEFAULT_ATTRIBUTE_TYPE;
protected XMLString value = null;
public AttrImpl() {
super(Node.ATTRIBUTE_NODE);
}
public AttrImpl (QName name) {
super( Node.ATTRIBUTE_NODE, name);
}
public AttrImpl( QName name, XMLString value ) {
super( Node.ATTRIBUTE_NODE, name);
this.value = value;
}
public AttrImpl (QName name, String str) {
super( Node.ATTRIBUTE_NODE, name);
this.value = new XMLString( str.toCharArray() );
}
public AttrImpl(AttrImpl other) {
super(other);
this.attributeType = other.attributeType;
this.value = other.value;
}
public void clear() {
super.clear();
attributeType = DEFAULT_ATTRIBUTE_TYPE;
value = null;
}
public byte[] serialize() {
if(nodeName.getLocalName() == null)
throw new RuntimeException("Local name is null");
final short id = ownerDocument.getBrokerPool().getSymbols().getSymbol( this );
final byte idSizeType = Signatures.getSizeType( id );
int prefixLen = 0;
if (nodeName.needsNamespaceDecl()) {
if (nodeName.getPrefix() != null && nodeName.getPrefix().length() > 0)
prefixLen = UTF8.encoded(nodeName.getPrefix());
}
final int nodeIdLen = nodeId.size();
final byte[] data = ByteArrayPool.getByteArray(
LENGTH_SIGNATURE_LENGTH + NodeId.LENGTH_NODE_ID_UNITS + nodeIdLen +
Signatures.getLength(idSizeType) +
(nodeName.needsNamespaceDecl() ? LENGTH_NS_ID + LENGTH_PREFIX_LENGTH + prefixLen : 0) +
value.UTF8Size());
int pos = 0;
data[pos] = (byte) ( Signatures.Attr << 0x5 );
data[pos] |= idSizeType;
data[pos] |= (byte) (attributeType << 0x2);
if(nodeName.needsNamespaceDecl())
data[pos] |= 0x10;
pos += StoredNode.LENGTH_SIGNATURE_LENGTH;
ByteConversion.shortToByte((short) nodeId.units(), data, pos);
pos += NodeId.LENGTH_NODE_ID_UNITS;
nodeId.serialize(data, pos);
pos += nodeIdLen;
Signatures.write(idSizeType, id, data, pos);
pos += Signatures.getLength(idSizeType);
if(nodeName.needsNamespaceDecl()) {
final short nsId = ownerDocument.getBrokerPool().getSymbols().getNSSymbol(nodeName.getNamespaceURI());
ByteConversion.shortToByte(nsId, data, pos);
pos += LENGTH_NS_ID;
ByteConversion.shortToByte((short)prefixLen, data, pos);
pos += LENGTH_PREFIX_LENGTH;
if (nodeName.getPrefix() != null && nodeName.getPrefix().length() > 0)
UTF8.encode(nodeName.getPrefix(), data, pos);
pos += prefixLen;
}
value.UTF8Encode(data, pos);
return data;
}
public static StoredNode deserialize( byte[] data, int start, int len, DocumentImpl doc, boolean pooled ) {
int pos = start;
byte idSizeType = (byte) ( data[pos] & 0x3 );
boolean hasNamespace = (data[pos] & 0x10) == 0x10;
int attrType = ( data[pos] & 0x4 ) >> 0x2;
pos += StoredNode.LENGTH_SIGNATURE_LENGTH;
int dlnLen = ByteConversion.byteToShort(data, pos);
pos += NodeId.LENGTH_NODE_ID_UNITS;
NodeId dln = doc.getBrokerPool().getNodeFactory().createFromData(dlnLen, data, pos);
pos += dln.size();
short id = (short) Signatures.read(idSizeType, data, pos);
pos += Signatures.getLength(idSizeType);
String name = doc.getBrokerPool().getSymbols().getName(id);
if (name == null)
throw new RuntimeException("no symbol for id " + id);
short nsId = 0;
String prefix = null;
if (hasNamespace) {
nsId = ByteConversion.byteToShort(data, pos);
pos += LENGTH_NS_ID;
int prefixLen = ByteConversion.byteToShort(data, pos);
pos += LENGTH_PREFIX_LENGTH;
if (prefixLen > 0)
prefix = UTF8.decode(data, pos, prefixLen).toString();
pos += prefixLen;
}
String namespace = nsId == 0 ? "" : doc.getBrokerPool().getSymbols().getNamespace(nsId);
XMLString value = UTF8.decode(data, pos, len - (pos - start));
//OK : we have the necessary material to build the attribute
AttrImpl attr;
if(pooled)
attr = (AttrImpl) NodePool.getInstance().borrowNode(Node.ATTRIBUTE_NODE);
// attr = (AttrImpl)NodeObjectPool.getInstance().borrowNode(AttrImpl.class);
else
attr = new AttrImpl();
attr.setNodeName(doc.getBrokerPool().getSymbols().getQName(Node.ATTRIBUTE_NODE, namespace, name, prefix));
attr.value = value;
attr.setNodeId(dln);
if (dln == null)
throw new RuntimeException("no node id " + id);
attr.setType(attrType);
return attr;
}
public static void addToList(DBBroker broker, byte[] data, int start, int len, AttrList list) {
int pos = start;
byte idSizeType = (byte) ( data[pos] & 0x3 );
boolean hasNamespace = (data[pos] & 0x10) == 0x10;
int attrType = ( data[pos] & 0x4 ) >> 0x2;
pos += StoredNode.LENGTH_SIGNATURE_LENGTH;
int dlnLen = ByteConversion.byteToShort(data, pos);
pos += NodeId.LENGTH_NODE_ID_UNITS;
NodeId dln = broker.getBrokerPool().getNodeFactory().createFromData(dlnLen, data, pos);
pos += dln.size();
short id = (short) Signatures.read(idSizeType, data, pos);
pos += Signatures.getLength(idSizeType);
String name = broker.getBrokerPool().getSymbols().getName(id);
if (name == null)
throw new RuntimeException("no symbol for id " + id);
short nsId = 0;
String prefix = null;
if (hasNamespace) {
nsId = ByteConversion.byteToShort(data, pos);
pos += LENGTH_NS_ID;
int prefixLen = ByteConversion.byteToShort(data, pos);
pos += LENGTH_PREFIX_LENGTH;
if (prefixLen > 0)
prefix = UTF8.decode(data, pos, prefixLen).toString();
pos += prefixLen;
}
String namespace = nsId == 0 ? "" : broker.getBrokerPool().getSymbols().getNamespace(nsId);
String value;
try {
value = new String( data, pos, len - (pos - start), "UTF-8" );
} catch (UnsupportedEncodingException uee) {
LOG.warn(uee);
value = new String( data, pos, len - (pos - start));
}
list.addAttribute(broker.getBrokerPool().getSymbols().getQName(Node.ATTRIBUTE_NODE, namespace, name, prefix), value, attrType, dln);
}
public String getName() {
return nodeName.getStringValue();
}
public int getType() {
return attributeType;
}
public void setType(int type) {
//TODO : range check -pb
attributeType = type;
}
public static String getAttributeType(int type) {
if (type == AttrImpl.ID)
return "ID";
if (type == AttrImpl.IDREF)
return "IDREF";
if (type == AttrImpl.IDREFS)
return "IDREFS";
return "CDATA";
}
public String getValue() {
return value.toString();
}
public String getNodeValue() {
return value.toString();
}
public void setValue(String str) throws DOMException {
this.value = new XMLString(str.toCharArray());
}
public Element getOwnerElement() {
return (Element) ((DocumentImpl)getOwnerDocument()).getNode( nodeId.getParentId() );
}
public boolean getSpecified() {
return true;
}
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append( ' ' );
buf.append( nodeName );
buf.append( "=\"" );
buf.append( value );
buf.append( '"' );
return buf.toString();
}
public String toString( boolean top ) {
if ( top ) {
StringBuilder result = new StringBuilder();
result.append( "<exist:attribute " );
result.append( "xmlns:exist=\"" + Namespaces.EXIST_NS + "\" " );
result.append( "exist:id=\"" );
result.append( getNodeId() );
result.append( "\" exist:source=\"" );
result.append( ((DocumentImpl)getOwnerDocument()).getFileURI());
result.append( "\" " );
result.append( getNodeName() );
result.append( "=\"" );
result.append( getValue() );
result.append( "\"/>" );
return result.toString();
}
else
return toString();
}
public boolean hasChildNodes() {
return false;
}
public int getChildCount() {
return 0;
}
public Node getFirstChild() {
//bad implementations don't call hasChildNodes before
return null;
}
/** ? @see org.w3c.dom.Attr#getSchemaTypeInfo()
*/
public TypeInfo getSchemaTypeInfo() {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Attr#isId()
*/
public boolean isId() {
return this.getType() == ID;
}
/** ? @see org.w3c.dom.Node#getBaseURI()
*/
public String getBaseURI() {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#compareDocumentPosition(org.w3c.dom.Node)
*/
public short compareDocumentPosition(Node other) throws DOMException {
// maybe TODO - new DOM interfaces - Java 5.0
return 0;
}
/** ? @see org.w3c.dom.Node#getTextContent()
*/
public String getTextContent() throws DOMException {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#setTextContent(java.lang.String)
*/
public void setTextContent(String textContent) throws DOMException {
// maybe TODO - new DOM interfaces - Java 5.0
}
/** ? @see org.w3c.dom.Node#isSameNode(org.w3c.dom.Node)
*/
public boolean isSameNode(Node other) {
// maybe TODO - new DOM interfaces - Java 5.0
return false;
}
/** ? @see org.w3c.dom.Node#lookupPrefix(java.lang.String)
*/
public String lookupPrefix(String namespaceURI) {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#isDefaultNamespace(java.lang.String)
*/
public boolean isDefaultNamespace(String namespaceURI) {
// maybe TODO - new DOM interfaces - Java 5.0
return false;
}
/** ? @see org.w3c.dom.Node#lookupNamespaceURI(java.lang.String)
*/
public String lookupNamespaceURI(String prefix) {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#isEqualNode(org.w3c.dom.Node)
*/
public boolean isEqualNode(Node arg) {
// maybe TODO - new DOM interfaces - Java 5.0
return false;
}
/** ? @see org.w3c.dom.Node#getFeature(java.lang.String, java.lang.String)
*/
public Object getFeature(String feature, String version) {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#setUserData(java.lang.String, java.lang.Object, org.w3c.dom.UserDataHandler)
*/
public Object setUserData(String key, Object data, UserDataHandler handler) {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
/** ? @see org.w3c.dom.Node#getUserData(java.lang.String)
*/
public Object getUserData(String key) {
// maybe TODO - new DOM interfaces - Java 5.0
return null;
}
}