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    • org.exist.xmlrpc.TupleParser Maven / Gradle / Ivy

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    /*
 * eXist-db Open Source Native XML Database
 * Copyright (C) 2001 The eXist-db Authors
 *
 * [email protected]
 * http://www.exist-db.org
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package org.exist.xmlrpc;

import com.evolvedbinary.j8fu.tuple.*;
import org.apache.ws.commons.util.NamespaceContextImpl;
import org.apache.xmlrpc.common.TypeFactory;
import org.apache.xmlrpc.common.XmlRpcStreamConfig;
import org.apache.xmlrpc.parser.RecursiveTypeParserImpl;
import org.apache.xmlrpc.serializer.TypeSerializerImpl;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import java.util.ArrayList;
import java.util.List;

/**
 * XML-RPC type parser for sub-classes of
 * {@link com.evolvedbinary.j8fu.tuple.Tuple}.
 *
 * @author Adam Retter
 */
class TupleParser extends RecursiveTypeParserImpl {
    private int level = 0;
    private List list;

    /**
     * Creates a new instance.
     *
     * @param context The namespace context.
     * @param config The request or response configuration.
     * @param factory The type factory.
     */
    TupleParser(final XmlRpcStreamConfig config, final NamespaceContextImpl context, final TypeFactory factory) {
        super(config, context, factory);
    }

    @Override
    public void startDocument() throws SAXException {
        level = 0;
        list = new ArrayList<>();
        super.startDocument();
    }

    @Override
    protected void addResult(final Object value) {
        list.add(value);
    }

    @Override
    public void endElement(final String uri, final String localName, final String qname) throws SAXException {
        switch (--level) {
            case 0:
                setResult(toTuple(list));
                break;
            case 1:
                break;
            case 2:
                endValueTag();
                break;
            default:
                super.endElement(uri, localName, qname);
        }
    }

    @Override
    public void startElement(final String uri, final String localName, final String qname, final Attributes attrs) throws SAXException {
        switch (level++) {
            case 0:
                if (!XMLConstants.NULL_NS_URI.equals(uri) || !TupleSerializer.TUPLE_TAG.equals(localName)) {
                    throw new SAXParseException("Expected tuple element, got "
                            + new QName(uri, localName),
                            getDocumentLocator());
                }
                break;
            case 1:
                if (!XMLConstants.NULL_NS_URI.equals(uri) || !TupleSerializer.DATA_TAG.equals(localName)) {
                    throw new SAXParseException("Expected data element, got "
                            + new QName(uri, localName),
                            getDocumentLocator());
                }
                break;
            case 2:
                if (!XMLConstants.NULL_NS_URI.equals(uri) || !TypeSerializerImpl.VALUE_TAG.equals(localName)) {
                    throw new SAXParseException("Expected value element, got "
                            + new QName(uri, localName),
                            getDocumentLocator());
                }
                startValueTag();
                break;
            default:
                super.startElement(uri, localName, qname, attrs);
                break;
        }
    }

    private Tuple toTuple(final List list) throws SAXException {
        switch(list.size()) {
            case 2:
                return new Tuple2<>(list.get(0), list.get(1));
            case 3:
                return new Tuple3<>(list.get(0), list.get(1), list.get(2));
            case 4:
                return new Tuple4<>(list.get(0), list.get(1), list.get(2), list.get(3));
            case 5:
                return new Tuple5<>(list.get(0), list.get(1), list.get(2), list.get(3), list.get(4));
            case 6:
                return new Tuple6<>(list.get(0), list.get(1), list.get(2), list.get(3), list.get(4), list.get(5));
            default:
                throw new SAXException("Unsupported Tuple arity: " + list.size());
        }
    }
}
    
    
    
    

    




    
    
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