Java example source code file (StAXValidatorHelper.java)

This example Java source code file (StAXValidatorHelper.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

default_transformer_impl, ioexception, object, sax, saxexception, saxresult, saxtransformerfactory, sourceresultmismatch, staxresult, staxvalidatorhelper, transformerexception, transformerfactoryconfigurationerror, transformerhandler, validatorhandlerimpl, xmlschemavalidatorcomponentmanager

The StAXValidatorHelper.java Java example source code

/*
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.org.apache.xerces.internal.jaxp.validation;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.utils.XMLSecurityManager;
import java.io.IOException;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stax.StAXResult;
import javax.xml.transform.stax.StAXSource;

import org.xml.sax.SAXException;

/**
 * <p>A validator helper for StAXSources.

 *
 * @author <a href="mailto:Sunitha.Reddy@Sun.com">Sunitha Reddy
 */
public final class StAXValidatorHelper implements ValidatorHelper {
    private static final String DEFAULT_TRANSFORMER_IMPL = "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl";

    /** Component manager. **/
    private XMLSchemaValidatorComponentManager fComponentManager;

    private Transformer identityTransformer1 = null;
    private TransformerHandler identityTransformer2 = null;
    private ValidatorHandlerImpl handler = null;

    /** Creates a new instance of StaxValidatorHelper */
    public StAXValidatorHelper(XMLSchemaValidatorComponentManager componentManager) {
        fComponentManager = componentManager;
    }

    public void validate(Source source, Result result)
        throws SAXException, IOException {

        if (result == null || result instanceof StAXResult) {

            if( identityTransformer1==null ) {
                try {
                    SAXTransformerFactory tf = fComponentManager.getFeature(Constants.ORACLE_FEATURE_SERVICE_MECHANISM) ?
                                    (SAXTransformerFactory)SAXTransformerFactory.newInstance()
                                    : (SAXTransformerFactory) TransformerFactory.newInstance(DEFAULT_TRANSFORMER_IMPL, StAXValidatorHelper.class.getClassLoader());
                    XMLSecurityManager securityManager = (XMLSecurityManager)fComponentManager.getProperty(Constants.SECURITY_MANAGER);
                    if (securityManager != null) {
                        for (XMLSecurityManager.Limit limit : XMLSecurityManager.Limit.values()) {
                            if (securityManager.isSet(limit.ordinal())){
                                tf.setAttribute(limit.apiProperty(),
                                        securityManager.getLimitValueAsString(limit));
                            }
                        }
                        if (securityManager.printEntityCountInfo()) {
                            tf.setAttribute(Constants.JDK_ENTITY_COUNT_INFO, "yes");
                        }
                    }

                    identityTransformer1 = tf.newTransformer();
                    identityTransformer2 = tf.newTransformerHandler();
                } catch (TransformerConfigurationException e) {
                    // this is impossible, but again better safe than sorry
                    throw new TransformerFactoryConfigurationError(e);
                }
            }

            handler = new ValidatorHandlerImpl(fComponentManager);
            if( result!=null ) {
                handler.setContentHandler(identityTransformer2);
                identityTransformer2.setResult(result);
            }

            try {
                identityTransformer1.transform( source, new SAXResult(handler) );
            } catch (TransformerException e) {
                if( e.getException() instanceof SAXException )
                    throw (SAXException)e.getException();
                throw new SAXException(e);
            } finally {
                handler.setContentHandler(null);
            }
            return;
        }
        throw new IllegalArgumentException(JAXPValidationMessageFormatter.formatMessage(fComponentManager.getLocale(),
                "SourceResultMismatch",
                new Object [] {source.getClass().getName(), result.getClass().getName()}));
    }
}