/*

 * 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.xml.internal.bind.v2.runtime.unmarshaller;

import javax.xml.bind.ValidationEventLocator;

import javax.xml.bind.helpers.ValidationEventLocatorImpl;

import javax.xml.namespace.NamespaceContext;

import javax.xml.stream.Location;

import javax.xml.stream.XMLStreamException;

import org.xml.sax.SAXException;

/**

 * @author Kohsuke Kawaguchi

 */

abstract class StAXConnector {

    public abstract void bridge() throws XMLStreamException;

    // event sink

    protected final XmlVisitor visitor;

    protected final UnmarshallingContext context;

    protected final XmlVisitor.TextPredictor predictor;

    private final class TagNameImpl extends TagName {

        public String getQname() {

            return StAXConnector.this.getCurrentQName();

        }

    }

    protected final TagName tagName = new TagNameImpl();

    protected StAXConnector(XmlVisitor visitor) {

        this.visitor = visitor;

        context = visitor.getContext();

        predictor = visitor.getPredictor();

    }

    /**

     * Gets the {@link Location}. Used for implementing the line number information.

     * @return must not null.

     */

    protected abstract Location getCurrentLocation();

    /**

     * Gets the QName of the current element.

     */

    protected abstract String getCurrentQName();

    protected final void handleStartDocument(NamespaceContext nsc) throws SAXException {

        visitor.startDocument(new LocatorEx() {

            public ValidationEventLocator getLocation() {

                return new ValidationEventLocatorImpl(this);

            }

            public int getColumnNumber() {

                return getCurrentLocation().getColumnNumber();

            }

            public int getLineNumber() {

                return getCurrentLocation().getLineNumber();

            }

            public String getPublicId() {

                return getCurrentLocation().getPublicId();

            }

            public String getSystemId() {

                return getCurrentLocation().getSystemId();

            }

        },nsc);

    }

    protected final void handleEndDocument() throws SAXException {

        visitor.endDocument();

    }

    protected static String fixNull(String s) {

        if(s==null) return "";

        else        return s;

    }

    protected final String getQName(String prefix, String localName) {

        if(prefix==null || prefix.length()==0)

            return localName;

        else

            return prefix + ':' + localName;

    }

}