/*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.xwiki.rendering.wikimodel.xml.sax;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xwiki.rendering.wikimodel.WikiPageUtil;
import org.xwiki.rendering.wikimodel.xml.ITagListener;
/**
* @version $Id: 61f05821aa7cffb5fdd4f183ef7218130a798bc1 $
* @since 4.0M1
*/
public class WemToSax implements ITagListener
{
private static Logger log = Logger.getLogger(WemToSax.class.getName());
public final static String USER_NS = "http://www.wikimodel.org/ns/user-defined-params#";
public final static String USER_PREFIX = "u";
public final static String WEM_NS = "http://www.wikimodel.org/ns/wem#";
public final static String WEM_PREFIX = "w";
private int fDepth;
private ContentHandler fHandler;
public WemToSax(ContentHandler handler)
{
fHandler = handler;
}
/**
* @see org.xwiki.rendering.wikimodel.xml.ITagListener#beginTag(java.lang.String,
* java.util.Map, java.util.Map)
*/
public void beginTag(
String tagName,
Map<String, String> tagParams,
Map<String, String> userParams)
{
String qualifiedTagName = null;
try {
qualifiedTagName = getQualifiedName(WEM_PREFIX, tagName);
if (fDepth == 0) {
fHandler.startDocument();
fHandler.startPrefixMapping(WEM_PREFIX, WEM_NS);
fHandler.startPrefixMapping(USER_PREFIX, USER_NS);
}
Attributes atts = getAttributes(tagParams, userParams);
fHandler.startElement(WEM_NS, tagName, qualifiedTagName, atts);
fDepth++;
} catch (Throwable t) {
handleError("[BEGIN_TAG]"
+ " Tag: '"
+ tagName
+ "'. QualifiedTagName: '"
+ qualifiedTagName
+ "'. "
+ "TagParams: ["
+ tagParams
+ "]. UserParams: ["
+ userParams
+ "]", t);
}
}
/**
* @see org.xwiki.rendering.wikimodel.xml.ITagListener#endTag(java.lang.String,
* java.util.Map, java.util.Map)
*/
public void endTag(
String tagName,
Map<String, String> tagParams,
Map<String, String> userParams)
{
String qualifiedTagName = null;
try {
qualifiedTagName = getQualifiedName(WEM_PREFIX, tagName);
fHandler.endElement(WEM_NS, tagName, qualifiedTagName);
fDepth--;
if (fDepth == 0) {
fHandler.endDocument();
}
} catch (Throwable t) {
handleError("[END_TAG]"
+ " Tag: '"
+ tagName
+ "'. QualifiedTagName: '"
+ qualifiedTagName
+ "'. "
+ "TagParams: ["
+ tagParams
+ "]. UserParams: ["
+ userParams
+ "]", t);
}
}
private Attributes getAttributes(
Map<String, String> tagParams,
Map<String, String> userParams)
{
final Map<String, String> attrs = new LinkedHashMap<String, String>();
for (Map.Entry<String, String> entry : tagParams.entrySet()) {
String qName = getQualifiedName(WEM_PREFIX, entry.getKey());
if (qName == null) {
continue;
}
String value = entry.getValue();
attrs.put(qName, value);
}
for (Map.Entry<String, String> entry : userParams.entrySet()) {
String qName = getQualifiedName(USER_PREFIX, entry.getKey());
if (qName == null) {
continue;
}
String value = entry.getValue();
attrs.put(qName, value);
}
@SuppressWarnings("unchecked")
final Map.Entry<String, String>[] array = attrs.entrySet().toArray(
new Map.Entry[attrs.size()]);
return new Attributes()
{
private Map.Entry<String, String> getEntry(int index)
{
return array[index];
}
public int getIndex(String qName)
{
int result = -1;
for (int i = 0; i < array.length; i++) {
if (qName.equals(array[i].getKey())) {
result = i;
break;
}
}
return result;
}
public int getIndex(String uri, String localName)
{
String prefix = null;
if (WEM_NS.equals(uri)) {
prefix = WEM_PREFIX;
} else if (USER_NS.equals(uri)) {
prefix = USER_PREFIX;
}
if (prefix == null) {
return -1;
}
return getIndex(prefix + ":" + localName);
}
public int getLength()
{
return array.length;
}
public String getLocalName(int index)
{
Map.Entry<String, String> entry = getEntry(index);
if (entry == null) {
return null;
}
return entry.getKey();
}
public String getQName(int index)
{
if (index < 0 || index >= array.length) {
return null;
}
Entry<String, String> entry = array[index];
return entry.getKey();
}
public String getType(int index)
{
return "CDATA";
}
public String getType(String qName)
{
return "CDATA";
}
public String getType(String uri, String localName)
{
return "CDATA";
}
public String getURI(int index)
{
String qName = getQName(index);
if (qName == null) {
return null;
}
return qName.startsWith(WEM_PREFIX) ? WEM_NS : qName
.startsWith(USER_PREFIX) ? USER_NS : null;
}
private String getValue(Entry<String, String> entry)
{
String value = entry != null ? entry.getValue() : null;
return value != null ? value : "";
}
public String getValue(int index)
{
Entry<String, String> entry = getEntry(index);
return getValue(entry);
}
public String getValue(String qName)
{
int idx = getIndex(qName);
Entry<String, String> entry = idx >= 0 ? array[idx] : null;
return getValue(entry);
}
public String getValue(String uri, String localName)
{
int idx = getIndex(uri, localName);
Entry<String, String> entry = idx >= 0 ? array[idx] : null;
return entry != null ? entry.getValue() : null;
}
};
}
/**
* @param tagName
* @return
*/
private String getQualifiedName(String prefix, String tagName)
{
if (tagName == null || tagName.length() == 0) {
return null;
}
tagName = WikiPageUtil.escapeXmlAttribute(tagName);
tagName = tagName.replaceAll(" ", "-");
boolean valid = WikiPageUtil.isValidXmlName(tagName, false);
if (!valid) {
return null;
}
return prefix != null && !"".equals(prefix)
? prefix + ":" + tagName
: tagName;
}
private void handleError(String s, Throwable e)
{
log.log(Level.SEVERE, s, e);
if (e instanceof Error) {
throw ((Error) e);
}
throw new RuntimeException(e);
}
/**
* @see org.xwiki.rendering.wikimodel.xml.ITagListener#onCDATA(java.lang.String)
*/
public void onCDATA(String content)
{
// FIXME: restore CDATA blocks notification
// onText(content);
}
/**
* @see org.xwiki.rendering.wikimodel.xml.ITagListener#onTag(java.lang.String,
* java.util.Map, java.util.Map)
*/
public void onTag(
String tagName,
Map<String, String> tagParams,
Map<String, String> userParams)
{
beginTag(tagName, tagParams, userParams);
endTag(tagName, tagParams, userParams);
}
/**
* @see org.xwiki.rendering.wikimodel.xml.ITagListener#onText(java.lang.String)
*/
public void onText(String content)
{
try {
if (content != null) {
char[] array = content.toCharArray();
int start = 0;
int i;
for (i = 0; i < array.length; i++) {
char c = array[i];
int ch = c;
if (WikiPageUtil.isValidXmlChar(ch)) {
boolean toEscape = (ch == '\''
|| ch == '\"'
|| ch == '['
|| ch == ']'
|| ch == '&' || ch == '|');
if (!toEscape) {
continue;
}
}
if (i != start) {
fHandler.characters(array, start, i - start);
start = i;
}
// FIXME: add notifications about the found entity
// buf.append("&#x" + Integer.toHexString(array[i]) +
// ";");
}
if (i != start) {
fHandler.characters(array, start, i - start);
}
}
} catch (Throwable e) {
handleError("onText error " + content, e);
}
}
}