| /* SAXSerializer.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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 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.transform; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import org.w3c.dom.Attr; |
| import org.w3c.dom.DocumentType; |
| import org.w3c.dom.NamedNodeMap; |
| import org.w3c.dom.Node; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.ext.LexicalHandler; |
| |
| /** |
| * Serializes a DOM node to a sequence of SAX events. |
| * |
| * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> |
| */ |
| class SAXSerializer |
| implements Attributes |
| { |
| |
| transient NamedNodeMap attrs; |
| transient LinkedList namespaces = new LinkedList(); |
| |
| boolean isDefined(String prefix, String uri) |
| { |
| for (Iterator i = namespaces.iterator(); i.hasNext(); ) |
| { |
| HashMap ctx = (HashMap) i.next(); |
| if (uri.equals(ctx.get(prefix))) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void define(String prefix, String uri) |
| { |
| for (Iterator i = namespaces.iterator(); i.hasNext(); ) |
| { |
| HashMap ctx = (HashMap) i.next(); |
| if (ctx.containsKey(prefix)) |
| { |
| HashMap newCtx = new HashMap(); |
| newCtx.put(prefix, uri); |
| namespaces.addFirst(newCtx); |
| return; |
| } |
| } |
| HashMap ctx; |
| if (namespaces.isEmpty()) |
| { |
| ctx = new HashMap(); |
| namespaces.add(ctx); |
| } |
| else |
| { |
| ctx = (HashMap) namespaces.getFirst(); |
| } |
| ctx.put(prefix, uri); |
| } |
| |
| void undefine(String prefix, String uri) |
| { |
| for (Iterator i = namespaces.iterator(); i.hasNext(); ) |
| { |
| HashMap ctx = (HashMap) i.next(); |
| if (uri.equals(ctx.get(prefix))) |
| { |
| ctx.remove(prefix); |
| if (ctx.isEmpty()) |
| { |
| namespaces.remove(ctx); |
| } |
| return; |
| } |
| } |
| } |
| |
| public int getLength() |
| { |
| return attrs.getLength(); |
| } |
| |
| public String getURI(int index) |
| { |
| return attrs.item(index).getNamespaceURI(); |
| } |
| |
| public String getLocalName(int index) |
| { |
| return attrs.item(index).getLocalName(); |
| } |
| |
| public String getQName(int index) |
| { |
| return attrs.item(index).getNodeName(); |
| } |
| |
| public String getType(int index) |
| { |
| Attr attr = (Attr) attrs.item(index); |
| return attr.isId() ? "ID" : "CDATA"; |
| } |
| |
| public String getValue(int index) |
| { |
| return attrs.item(index).getNodeValue(); |
| } |
| |
| public int getIndex(String uri, String localName) |
| { |
| int len = attrs.getLength(); |
| for (int i = 0; i < len; i++) |
| { |
| Node attr = attrs.item(i); |
| String a_uri = attr.getNamespaceURI(); |
| String a_localName = attr.getLocalName(); |
| if (((a_uri == null && uri == null) || |
| (a_uri != null && a_uri.equals(uri))) && |
| a_localName.equals(localName)) |
| { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| public int getIndex(String qName) |
| { |
| int len = attrs.getLength(); |
| for (int i = 0; i < len; i++) |
| { |
| Node attr = attrs.item(i); |
| String a_name = attr.getNodeName(); |
| if (a_name.equals(qName)) |
| { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| public String getType(String uri, String localName) |
| { |
| Attr attr = (Attr) attrs.getNamedItemNS(uri, localName); |
| return attr.isId() ? "ID" : "CDATA"; |
| } |
| |
| public String getType(String qName) |
| { |
| Attr attr = (Attr) attrs.getNamedItem(qName); |
| return attr.isId() ? "ID" : "CDATA"; |
| } |
| |
| public String getValue(String uri, String localName) |
| { |
| return attrs.getNamedItemNS(uri, localName).getNodeValue(); |
| } |
| |
| public String getValue(String qName) |
| { |
| return attrs.getNamedItem(qName).getNodeValue(); |
| } |
| |
| void serialize(Node node, ContentHandler ch, LexicalHandler lh) |
| throws SAXException |
| { |
| attrs = node.getAttributes(); |
| Node children; |
| Node next = node.getNextSibling(); |
| switch (node.getNodeType()) |
| { |
| case Node.ELEMENT_NODE: |
| String uri = node.getNamespaceURI(); |
| String prefix = node.getPrefix(); |
| boolean defined = isDefined(prefix, uri); |
| if (!defined) |
| { |
| define(prefix, uri); |
| ch.startPrefixMapping(prefix, uri); |
| } |
| String localName = node.getLocalName(); |
| String qName = node.getNodeName(); |
| ch.startElement(uri, localName, qName, this); |
| children = node.getFirstChild(); |
| if (children != null) |
| { |
| serialize(children, ch, lh); |
| } |
| ch.endElement(uri, localName, qName); |
| if (!defined) |
| { |
| ch.endPrefixMapping(prefix); |
| undefine(prefix, uri); |
| } |
| break; |
| case Node.TEXT_NODE: |
| char[] chars = node.getNodeValue().toCharArray(); |
| ch.characters(chars, 0, chars.length); |
| break; |
| case Node.CDATA_SECTION_NODE: |
| char[] cdata = node.getNodeValue().toCharArray(); |
| if (lh != null) |
| { |
| lh.startCDATA(); |
| ch.characters(cdata, 0, cdata.length); |
| lh.endCDATA(); |
| } |
| else |
| { |
| ch.characters(cdata, 0, cdata.length); |
| } |
| break; |
| case Node.COMMENT_NODE: |
| if (lh != null) |
| { |
| char[] comment = node.getNodeValue().toCharArray(); |
| lh.comment(comment, 0, comment.length); |
| } |
| break; |
| case Node.DOCUMENT_NODE: |
| case Node.DOCUMENT_FRAGMENT_NODE: |
| ch.startDocument(); |
| children = node.getFirstChild(); |
| if (children != null) |
| { |
| serialize(children, ch, lh); |
| } |
| ch.endDocument(); |
| break; |
| case Node.DOCUMENT_TYPE_NODE: |
| if (lh != null) |
| { |
| DocumentType doctype = (DocumentType) node; |
| String publicId = doctype.getPublicId(); |
| String systemId = doctype.getSystemId(); |
| lh.startDTD(node.getNodeName(), publicId, systemId); |
| NamedNodeMap entities = doctype.getEntities(); |
| int len = entities.getLength(); |
| for (int i = 0; i < len; i++) |
| { |
| Node entity = entities.item(i); |
| String entityName = entity.getNodeName(); |
| lh.startEntity(entityName); |
| lh.endEntity(entityName); |
| } |
| lh.endDTD(); |
| } |
| break; |
| case Node.PROCESSING_INSTRUCTION_NODE: |
| ch.processingInstruction(node.getNodeName(), node.getNodeValue()); |
| break; |
| case Node.ENTITY_REFERENCE_NODE: |
| ch.skippedEntity(node.getNodeName()); |
| break; |
| } |
| attrs = null; |
| if (next != null) |
| { |
| serialize(next, ch, lh); |
| } |
| } |
| |
| } |
