/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* the JRDF Project (http://jrdf.sf.net/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
* nor may "JRDF" appear in their names without prior written
* permission of the JRDF Project.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project. For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
*
*/
package org.jrdf.parser.n3.parser;
import org.jrdf.graph.ObjectNode;
import org.jrdf.parser.ParseException;
import org.jrdf.parser.ntriples.parser.BlankNodeParser;
import org.jrdf.parser.ntriples.parser.LiteralParser;
import org.jrdf.parser.ntriples.parser.ObjectParser;
import org.jrdf.util.boundary.RegexMatcher;
import org.jrdf.util.boundary.RegexMatcherFactory;
import static org.jrdf.util.param.ParameterUtil.checkNotNull;
import java.util.regex.Pattern;
import static java.util.regex.Pattern.compile;
public final class NamespaceAwareObjectParser implements ObjectParser {
private static final Pattern REGEX = compile(
"(<([\\x20-\\x7E]+?)>||((\\p{Alpha}[\\x20-\\x7E]*?):([\\x20-\\x7E]*?))" +
"|_:(\\p{Alpha}[\\x20-\\x7E]*?)|([\\x20-\\x7E]+?))");
private static final int LINE_GROUP = 0;
private static final int URI_GROUP = 2;
private static final int NS_LOCAL_NAME_GROUP = 3;
private static final int BLANK_NODE_GROUP = 6;
private static final int LITERAL_GROUP = 7;
private final RegexMatcherFactory factory;
private final NamespaceAwareURIReferenceParser uriReferenceParser;
private final BlankNodeParser blankNodeParser;
private final LiteralParser literalParser;
public NamespaceAwareObjectParser(final RegexMatcherFactory newFactory,
final NamespaceAwareURIReferenceParser newUriReferenceParser, final BlankNodeParser newBlankNodeParser,
final LiteralParser newLiteralParser) {
checkNotNull(newFactory, newUriReferenceParser, newBlankNodeParser, newLiteralParser);
factory = newFactory;
uriReferenceParser = newUriReferenceParser;
blankNodeParser = newBlankNodeParser;
literalParser = newLiteralParser;
}
public ObjectNode parseNode(final CharSequence line) throws ParseException {
checkNotNull(line);
final RegexMatcher regexMatcher = factory.createMatcher(REGEX, line);
if (regexMatcher.matches()) {
return parseObject(regexMatcher);
} else {
throw new IllegalArgumentException("Couldn't match line: " + line);
}
}
private ObjectNode parseObject(final RegexMatcher matcher) throws ParseException {
if (matcher.group(URI_GROUP) != null) {
return uriReferenceParser.parseURIReference(matcher.group(URI_GROUP));
} else if (matcher.group(NS_LOCAL_NAME_GROUP) != null) {
return uriReferenceParser.parseURIReferenceWithNamespace(matcher.group(NS_LOCAL_NAME_GROUP));
} else if (matcher.group(BLANK_NODE_GROUP) != null) {
return blankNodeParser.parseBlankNode(matcher.group(BLANK_NODE_GROUP));
} else if (matcher.group(LITERAL_GROUP) != null) {
return literalParser.parseLiteral(matcher.group(LITERAL_GROUP));
} else {
throw new ParseException("Failed to parse line: " + matcher.group(LINE_GROUP), 1);
}
}
}