microsoft.exchange.webservices.data.security.SafeXmlDocument.java Source code

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Here is the source code for microsoft.exchange.webservices.data.security.SafeXmlDocument.java

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/*
 * The MIT License
 * Copyright (c) 2012 Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package microsoft.exchange.webservices.data.security;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;

/**
 * XmlDocument that does not allow DTD parsing.
 */
public class SafeXmlDocument extends DocumentBuilder {

    private static final Log LOG = LogFactory.getLog(SafeXmlDocument.class);

    /**
     * Initializes a new instance of the SafeXmlDocument class.
     */
    private final XMLInputFactory inputFactory;

    public SafeXmlDocument() {
        super();
        inputFactory = XMLInputFactory.newInstance();
    }

    /**
     * Loads the XML document from the specified stream.
     *
     * @param inStream The stream containing the XML document to load.
     * @throws javax.xml.stream.XMLStreamException
     */
    public void load(InputStream inStream) throws XMLStreamException {
        // not in a using block because
        // the stream doesn't belong to us
        if (inputFactory != null) {
            XMLEventReader reader = inputFactory.createXMLEventReader(inStream);

            this.load((InputStream) reader);
        }
    }

    /**
     * Loads the XML document from the specified URL.
     *
     * @param filename URL for the file containing the XML document to load. The URL
     *                 can be either a local file or an HTTP URL (a Web address).
     */
    public void load(String filename) {
        if (inputFactory != null) {
            FileInputStream inp;

            XMLEventReader reader;
            try {
                inp = new FileInputStream(filename);
                reader = inputFactory.createXMLEventReader(inp);
                this.load((InputStream) reader);
            } catch (XMLStreamException e) {
                // TODO Auto-generated catch block
                LOG.error(e);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                LOG.error(e);
            }
        }
    }

    /**
     * Loads the XML document from the specified TextReader.
     *
     * @param txtReader The TextReader used to feed the XML data into the document.
     */
    public void load(Reader txtReader) {
        if (inputFactory != null) {

            XMLEventReader reader;
            try {
                reader = inputFactory.createXMLEventReader(txtReader);

                this.load((InputStream) reader);
            } catch (XMLStreamException e) {
                // TODO Auto-generated catch block
                LOG.error(e);
            }
        }
    }

    /**
     * Loads the XML document from the specified XMLReader.
     *
     * @param reader The XMLReader used to feed the XML data into the document.
     * @throws java.io.IOException
     * @throws org.xml.sax.SAXException
     */
    public void load(XMLStreamReader reader) throws SAXException, IOException {

        super.parse((InputStream) reader);
    }

    /**
     * Loads the XML document from the specified string.
     *
     * @param xml String containing the XML document to load.
     */
    public void loadXml(String xml) {
        if (inputFactory != null) {
            try {
                XMLEventReader reader = inputFactory.createXMLEventReader(new StringReader(xml));

                this.load((InputStream) reader);
            } catch (XMLStreamException e) {
                // TODO Auto-generated catch block
                LOG.error(e);
            }
        }

    }

    @Override
    public DOMImplementation getDOMImplementation() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public boolean isNamespaceAware() {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean isValidating() {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public Document newDocument() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public Document parse(InputSource is) throws SAXException, IOException {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void setEntityResolver(EntityResolver er) {
        // TODO Auto-generated method stub

    }

    @Override
    public void setErrorHandler(ErrorHandler eh) {
        // TODO Auto-generated method stub

    }

}