gov.nih.nci.ncicb.cadsr.bulkloader.schema.validator.SchemaValidatorImpl.java Source code

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Here is the source code for gov.nih.nci.ncicb.cadsr.bulkloader.schema.validator.SchemaValidatorImpl.java

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/*L
 * Copyright Oracle Inc, SAIC-F.
 *
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/cadsr-bulk-loader/LICENSE.txt for details.
 */

package gov.nih.nci.ncicb.cadsr.bulkloader.schema.validator;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;

import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.sax.SAXSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * 
 * @author Ashwin Mathur
 * @version 1.0, Nov 21, 2008
 * @since 
 */

public class SchemaValidatorImpl implements SchemaValidator {

    private final String xsdFilePath = "gov/nih/nci/ncicb/cadsr/bulkloader/schema/cadsr_iso11179.xsd";

    private static Log log = LogFactory.getLog(SchemaValidatorImpl.class);
    private ClassLoader classLoader = SchemaValidatorImpl.class.getClassLoader();

    public SchemaValidationResult validate(File _xmlFile) {
        SchemaValidationResult result = new SchemaValidationResult();
        result.setInputFile(_xmlFile);
        try {
            Validator validator = getValidator();
            Source source = getSource(_xmlFile);
            validator.validate(source);
        } catch (FileNotFoundException e) {
            result.setException(e);
            result.setStatus(SchemaValidationStatus.FILE_READ_FAILURE);
            result.setMessage(e.getMessage());
        } catch (SAXException e) {
            result.setException(e);
            result.setStatus(SchemaValidationStatus.FAILURE);
        } catch (IOException e) {
            result.setException(e);
            result.setStatus(SchemaValidationStatus.FAILURE);
        }

        return result;
    }

    /**
     * 
     * @return <code>javax.xml.validation.Validator</code>
     * @throws SchemaValidationException
     */
    private Validator getValidator() throws SAXException {
        Schema schema = getSchema();
        Validator validator = schema.newValidator();

        return validator;
    }

    /**
     * 
     * @return <code>javax.xml.validation.Schema</code>
     * @throws SchemaValidationException
     */
    private Schema getSchema() throws SAXException {
        URL xsdURL = getSchemaURL();
        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = schemaFactory.newSchema(xsdURL);

        return schema;
    }

    /**
     * Gets the schema file
     * @return File
     */
    private URL getSchemaURL() {
        URL xsdURL = classLoader.getResource(xsdFilePath);

        return xsdURL;
    }

    /**
     * 
     * @param _xmlFile
     * @return <code>javax.xml.transform.Source</code>
     * @throws SchemaValidationException
     */
    private Source getSource(File _xmlFile) throws FileNotFoundException {
        InputSource inputSource = new InputSource(new FileInputStream(_xmlFile));
        SAXSource saxSource = new SAXSource(inputSource);

        return saxSource;
    }

}