org.commonjava.rwx.impl.stax.StaxParser.java Source code

Introduction

Here is the source code for org.commonjava.rwx.impl.stax.StaxParser.java

Source

/**
 * Copyright (C) 2010 Red Hat, Inc. (jdcasey@commonjava.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.commonjava.rwx.impl.stax;

import org.apache.commons.lang.StringUtils;
import org.commonjava.rwx.error.XmlRpcException;
import org.commonjava.rwx.impl.TrackingXmlRpcListener;
import org.commonjava.rwx.impl.estream.EventStreamParserImpl;
import org.commonjava.rwx.impl.stax.helper.RequestHelper;
import org.commonjava.rwx.impl.stax.helper.ResponseHelper;
import org.commonjava.rwx.spi.XmlRpcListener;
import org.commonjava.rwx.spi.XmlRpcParser;
import org.commonjava.rwx.vocab.XmlRpcConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;

public class StaxParser implements XmlRpcParser {

    private final XMLInputFactory factory;

    private XMLStreamReader reader;

    public StaxParser(final InputStream in) throws XmlRpcException {
        factory = XMLInputFactory.newInstance();
        try {
            reader = factory.createXMLStreamReader(in);
        } catch (final XMLStreamException e) {
            throw new XmlRpcException("Failed to initialize stream reader: " + e.getMessage(), e);
        }
    }

    public StaxParser(final Reader in) throws XmlRpcException {
        factory = XMLInputFactory.newInstance();
        try {
            reader = factory.createXMLStreamReader(in);
        } catch (final XMLStreamException e) {
            throw new XmlRpcException("Failed to initialize stream reader: " + e.getMessage(), e);
        }
    }

    public StaxParser(final String in) throws XmlRpcException {
        factory = XMLInputFactory.newInstance();
        try {
            reader = factory.createXMLStreamReader(new StringReader(in));
        } catch (final XMLStreamException e) {
            throw new XmlRpcException("Failed to initialize stream reader: " + e.getMessage(), e);
        }
    }

    public void parse(final XmlRpcListener l) throws XmlRpcException {
        XmlRpcListener listener = l;
        Logger logger = LoggerFactory.getLogger(getClass());
        TrackingXmlRpcListener tracker = null;
        //        EventStreamParserImpl estream = null;
        //        if ( logger.isTraceEnabled() )
        //        {
        tracker = new TrackingXmlRpcListener(l);
        listener = tracker;
        //            estream = new EventStreamParserImpl( tracker );
        //            listener = estream;
        //        }

        try {
            while (reader.hasNext()) {
                final int tag = reader.next();
                if (tag == XMLStreamReader.START_ELEMENT) {
                    final String tagName = reader.getName().getLocalPart();
                    if (XmlRpcConstants.REQUEST.equals(tagName)) {
                        RequestHelper.parse(reader, listener);
                    } else if (XmlRpcConstants.RESPONSE.equals(tagName)) {
                        ResponseHelper.parse(reader, listener);
                    }
                }
            }
        } catch (final XMLStreamException e) {
            throw new XmlRpcException("Failed to parse input: " + e.getMessage(), e);
        } catch (final RuntimeException e) {

        }
        //        finally
        //        {
        //            if ( logger.isTraceEnabled() )
        //            {
        //                try
        //                {
        //                    logger.trace( "Message parse call trace:\n\n  {}\n\nEvent tree:\n\n  {}\n\n",
        //                                  StringUtils.join( tracker.getCalls(), "\n  " ), estream.renderEventTree() );
        //                }
        //                catch ( Throwable t )
        //                {
        //                }
        //            }
        //        }
    }
}