/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Copyright 2001-2004 The Apache Software Foundation.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

/*

 * $Id: XSLTCSource.java,v 1.2.4.1 2005/09/06 12:43:28 pvedula Exp $

 */

package com.sun.org.apache.xalan.internal.xsltc.trax;

import javax.xml.transform.Source;

import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xalan.internal.xsltc.DOM;

import com.sun.org.apache.xalan.internal.xsltc.StripFilter;

import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;

import com.sun.org.apache.xalan.internal.xsltc.dom.DOMWSFilter;

import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl;

import com.sun.org.apache.xalan.internal.xsltc.dom.XSLTCDTMManager;

import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;

import org.xml.sax.SAXException;

/**

 * @author Morten Jorgensen

 */

public final class XSLTCSource implements Source {

    private String     _systemId = null;

    private Source     _source   = null;

    private ThreadLocal _dom     = new ThreadLocal();

    /**

     * Create a new XSLTC-specific source from a system ID

     */

    public XSLTCSource(String systemId)

    {

        _systemId = systemId;

    }

    /**

     * Create a new XSLTC-specific source from a JAXP Source

     */

    public XSLTCSource(Source source)

    {

        _source = source;

    }

    /**

     * Implements javax.xml.transform.Source.setSystemId()

     * Set the system identifier for this Source.

     * This Source can get its input either directly from a file (in this case

     * it will instanciate and use a JAXP parser) or it can receive it through

     * ContentHandler/LexicalHandler interfaces.

     * @param systemId The system Id for this Source

     */

    public void setSystemId(String systemId) {

        _systemId = systemId;

        if (_source != null) {

            _source.setSystemId(systemId);

        }

    }

    /**

     * Implements javax.xml.transform.Source.getSystemId()

     * Get the system identifier that was set with setSystemId.

     * @return The system identifier that was set with setSystemId,

     *         or null if setSystemId was not called.

     */

    public String getSystemId() {

        if (_source != null) {

            return _source.getSystemId();

        }

        else {

            return(_systemId);

        }

    }

    /**

     * Internal interface which returns a DOM for a given DTMManager and translet.

     */

    protected DOM getDOM(XSLTCDTMManager dtmManager, AbstractTranslet translet)

        throws SAXException

    {

        SAXImpl idom = (SAXImpl)_dom.get();

        if (idom != null) {

            if (dtmManager != null) {

                idom.migrateTo(dtmManager);

            }

        }

        else {

            Source source = _source;

            if (source == null) {

                if (_systemId != null && _systemId.length() > 0) {

                    source = new StreamSource(_systemId);

                }

                else {

                    ErrorMsg err = new ErrorMsg(ErrorMsg.XSLTC_SOURCE_ERR);

                    throw new SAXException(err.toString());

                }

            }

            DOMWSFilter wsfilter = null;

            if (translet != null && translet instanceof StripFilter) {

                wsfilter = new DOMWSFilter(translet);

            }

            boolean hasIdCall = (translet != null) ? translet.hasIdCall() : false;

            if (dtmManager == null) {

                dtmManager = XSLTCDTMManager.newInstance();

            }

            idom = (SAXImpl)dtmManager.getDTM(source, true, wsfilter, false, false, hasIdCall);

            String systemId = getSystemId();

            if (systemId != null) {

                idom.setDocumentURI(systemId);

            }

            _dom.set(idom);

        }

        return idom;

    }

}