com.bradmcevoy.http.webdav.DefaultPropPatchParser.java Source code

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Here is the source code for com.bradmcevoy.http.webdav.DefaultPropPatchParser.java

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/*
 * Copyright (C) 2012 McEvoy Software Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package com.bradmcevoy.http.webdav;

import com.bradmcevoy.io.ReadingException;
import com.bradmcevoy.io.StreamUtils;
import com.bradmcevoy.io.WritingException;
import java.io.ByteArrayInputStream;
import org.apache.commons.io.output.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.HashSet;
import javax.xml.namespace.QName;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

/**
 *
 * @author brad
 */
public class DefaultPropPatchParser implements PropPatchRequestParser {

    private final static Logger log = LoggerFactory.getLogger(DefaultPropPatchParser.class);

    public ParseResult getRequestedFields(InputStream in) {
        log.debug("getRequestedFields");
        try {
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            StreamUtils.readTo(in, bout, false, true);
            byte[] arr = bout.toByteArray();
            return parseContent(arr);
        } catch (SAXException ex) {
            throw new RuntimeException(ex);
        } catch (ReadingException ex) {
            throw new RuntimeException(ex);
        } catch (WritingException ex) {
            throw new RuntimeException(ex);
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }

    private ParseResult parseContent(byte[] arr) throws IOException, SAXException {
        if (arr.length > 0) {
            log.debug("processing content");
            ByteArrayInputStream bin = new ByteArrayInputStream(arr);
            XMLReader reader = XMLReaderFactory.createXMLReader();
            PropPatchSaxHandler handler = new PropPatchSaxHandler();
            reader.setContentHandler(handler);
            reader.parse(new InputSource(bin));
            log.debug("toset: " + handler.getAttributesToSet().size());
            return new ParseResult(handler.getAttributesToSet(), handler.getAttributesToRemove().keySet());
        } else {
            log.debug("empty content");
            return new ParseResult(new HashMap<QName, String>(), new HashSet<QName>());
        }

    }
}