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/*
* DSI utilities
*
* Copyright (C) 2010-2023 Sebastiano Vigna
*
* This program and the accompanying materials are made available under the
* terms of the GNU Lesser General Public License v2.1 or later,
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html,
* or the Apache Software License 2.0, which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* 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.
*
* SPDX-License-Identifier: LGPL-2.1-or-later OR Apache-2.0
*/
package it.unimi.dsi.parser.callback;
import java.util.Iterator;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;
import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
import it.unimi.dsi.fastutil.objects.ReferenceSet;
import it.unimi.dsi.lang.MutableString;
import it.unimi.dsi.parser.Attribute;
import it.unimi.dsi.parser.BulletParser;
import it.unimi.dsi.parser.Element;
/** An adapter from callbacks of the bullet parser to standard
* SAX content handler. Can be used to run, eg., <code>tagsoup</code>
* and the bullet parser against a page and check that the
* actual callback invocations are the same.
*/
@Deprecated
public class BulletParserCallbackContentHandler extends DefaultHandler {
/** The delegated callback. */
private final Callback callback;
/** The corresponding parser. */
private final BulletParser parser;
/** The element enclosing the current CDATA section, or {@code null}
* if we're not in a CDATA section. */
private Element inCdata;
/** The set of tags enclosing CDATA sections. */
private final ReferenceSet<Element> cdataElements = new ReferenceOpenHashSet<>(new Element[] { Element.SCRIPT, Element.STYLE });
/** The map used to fake an attribute map. */
private final Reference2ObjectOpenHashMap<Attribute,MutableString> attrMap = new Reference2ObjectOpenHashMap<>();
public BulletParserCallbackContentHandler(final BulletParser parser, final Callback callback) {
this.parser = parser;
this.callback = callback;
}
@Override
public void endDocument() {
callback.endDocument();
}
@Override
public void endElement(final String uri, final String localName, final String qName) {
final Element element = parser.factory.getElement(new MutableString(localName));
if (cdataElements.contains(element) && element == inCdata) inCdata = null;
callback.endElement(element);
}
@Override
public void characters(final char[] ch, final int start, final int length) {
if (inCdata != null) callback.cdata(inCdata, ch, start, length);
else callback.characters(ch, start, length, false);
}
@Override
public void ignorableWhitespace(final char[] ch, final int start, final int length) {
callback.characters(ch, start, length, false);
}
@Override
public void startDocument() {
callback.startDocument();
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) {
attrMap.clear();
String value;
Attribute attribute;
for (final Iterator<Attribute> i = parser.parsedAttributes.iterator(); i.hasNext();) {
attribute = i.next();
value = attributes.getValue(attribute.toString());
if (value != null)
attrMap.put(attribute, new MutableString(value));
}
final Element element = parser.factory.getElement(new MutableString(localName));
if (cdataElements.contains(element)) inCdata = element;
callback.startElement(element, attrMap);
}
}
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