org.cagrid.gaards.websso.utils.FileHelper.java Source code

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Here is the source code for org.cagrid.gaards.websso.utils.FileHelper.java

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/*
* Copyright ScenPro, Inc and SemanticBits, LLC
* 
* Distributed under the OSI-approved BSD 3-Clause License.
* See http://ncip.github.com/labviewer/LICENSE.txt for details.
*/
package org.cagrid.gaards.websso.utils;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.cagrid.gaards.websso.exception.AuthenticationConfigurationException;
import org.jdom.Document;
import org.jdom.input.DOMBuilder;
import org.springframework.core.io.ClassPathResource;
import org.w3c.dom.DOMException;
import org.xml.sax.SAXException;

public class FileHelper {
    public FileHelper() {
    }

    public InputStream getFileAsStream(String fileName) throws AuthenticationConfigurationException {
        ClassPathResource cpr = new ClassPathResource(fileName);
        if (!cpr.exists()) {
            throw new AuthenticationConfigurationException("Unable to load " + fileName + " file");
        }
        try {
            return cpr.getInputStream();
        } catch (IOException ie) {
            throw new AuthenticationConfigurationException("Unable to load " + fileName + " file");
        }
    }

    public URL getFileAsURL(String fileName) throws AuthenticationConfigurationException {
        ClassPathResource cpr = new ClassPathResource(fileName);
        if (!cpr.exists()) {
            throw new AuthenticationConfigurationException("Unable to load " + fileName + " file");
        }
        try {
            return cpr.getURL();
        } catch (IOException ie) {
            throw new AuthenticationConfigurationException("Unable to load " + fileName + " file");
        }
    }

    public File getFile(String fileName) throws AuthenticationConfigurationException {
        URL url = getFileAsURL(fileName);
        URI uri;
        try {
            uri = new URI(url.toString());
        } catch (URISyntaxException e) {
            throw new AuthenticationConfigurationException("Error obtaining the URI for the " + fileName + " file");
        }
        return new File(uri);
    }

    public Document validateXMLwithSchema(String propertiesFileName, String schemaFileName)
            throws AuthenticationConfigurationException {
        org.w3c.dom.Document document = null;
        InputStream schemaFileInputStream = getFileAsStream(schemaFileName);
        URL propertiesFileURL = getFileAsURL(propertiesFileName);

        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setNamespaceAware(true);
        documentBuilderFactory.setValidating(false);
        documentBuilderFactory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage",
                "http://www.w3.org/2001/XMLSchema");
        documentBuilderFactory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaSource",
                schemaFileInputStream);
        DocumentBuilder documentBuilder = null;
        try {
            documentBuilder = documentBuilderFactory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            throw new AuthenticationConfigurationException("Error in parsing the " + propertiesFileName + " file");
        }
        try {
            document = (org.w3c.dom.Document) documentBuilder.parse(propertiesFileURL.getPath());
        } catch (SAXException e) {
            throw new AuthenticationConfigurationException("Error in parsing the " + propertiesFileName + " file");
        } catch (DOMException de) {
            throw new AuthenticationConfigurationException("Error in parsing the " + propertiesFileName + " file");
        } catch (IOException e) {
            throw new AuthenticationConfigurationException("Error in reading the " + propertiesFileName + " file");
        }
        DOMBuilder builder = new DOMBuilder();
        org.jdom.Document jdomDocument = builder.build(document);

        return jdomDocument;
    }

}