/*

 * 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

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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 <code>StAXSource</code>s.</p>

 *

 */

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()}));

    }

}