org.eclipse.smila.utils.xml.SchemaUtils.java Source code

Introduction

Here is the source code for org.eclipse.smila.utils.xml.SchemaUtils.java

Source

/***********************************************************************************************************************
 * Copyright (c) 2008 empolis GmbH and brox IT Solutions GmbH. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Ivan Churkin (brox IT Solutions GmbH) - initial creator
 **********************************************************************************************************************/
package org.eclipse.smila.utils.xml;

import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.Bundle;
import org.xml.sax.SAXException;

/**
 * The Class SchemaHelper.
 */
public final class SchemaUtils {

    // /** The Constant SCHEMA_FACTORY. */
    // private static final SchemaFactory SCHEMA_FACTORY =
    // SchemaFactory.newInstance(javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI);

    /**
     * prevents instantiating of schema utils.
     */
    private SchemaUtils() {

    }

    /**
     * Load schema.
     * 
     * @param bundleId
     *          the bundle id
     * @param schemaLocation
     *          the schema location
     * 
     * @return the schema
     * 
     * @throws SAXException
     *           the SAX exception
     */
    public static Schema loadSchema(final String bundleId, final String schemaLocation) throws SAXException {
        final Bundle bundle = Platform.getBundle(bundleId);
        return loadSchema(bundle, schemaLocation);
    }

    /**
     * Load schema runtime ex.
     * 
     * @param bundleId
     *          the bundle id
     * @param schemaLocation
     *          the schema location
     * 
     * @return the schema
     */
    public static Schema loadSchemaRuntimeEx(final String bundleId, final String schemaLocation) {
        final Bundle bundle = Platform.getBundle(bundleId);
        return loadSchemaRuntimeEx(bundle, schemaLocation);
    }

    /**
     * Load schema.
     * 
     * @param resourcePath
     *          the schema location
     * @param bundle
     *          the bundle
     * 
     * @return the schema
     * 
     * @throws SAXException
     *           the SAX exception
     */
    public static Schema loadSchema(final Bundle bundle, final String resourcePath) throws SAXException {
        // TODO: remove it when DS will work ok
        final ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
        Thread.currentThread().setContextClassLoader(SchemaUtils.class.getClassLoader());
        final SchemaFactory schemaFactory = SchemaFactory.newInstance(javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI);
        final Schema schema = schemaFactory.newSchema(bundle.getEntry(resourcePath));
        Thread.currentThread().setContextClassLoader(oldCL);
        return schema;
    }

    /**
     * Load schema runtime ex.
     * 
     * @param bundle
     *          the bundle
     * @param resourcePath
     *          the resource path
     * 
     * @return the schema
     */
    public static Schema loadSchemaRuntimeEx(final Bundle bundle, final String resourcePath) {
        final Log log = LogFactory.getLog(SchemaUtils.class);
        try {
            return loadSchema(bundle, resourcePath);
        } catch (Throwable e) {
            if (log.isErrorEnabled()) {
                log.error(e);
            }
            throw new RuntimeException(e);
        }
    }

}