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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

package org.apache.xerces.util;

import javax.xml.stream.Location;

import org.apache.xerces.xni.XMLLocator;

/**
 * A light wrapper around a StAX location. This is useful
 * when bridging between StAX and XNI components.
 * 
 * @author Michael Glavassevich, IBM
 * 
 * @version $Id: StAXLocationWrapper.java 683678 2008-08-07 19:13:14Z mrglavas $
 */
public final class StAXLocationWrapper implements XMLLocator {

    private Location fLocation = null;
    
    public StAXLocationWrapper() {}
    
    public void setLocation(Location location) {
        fLocation = location;
    }
    
    public Location getLocation() {
        return fLocation;
    }
    
    /*
     * XMLLocator methods
     */

    public String getPublicId() {
        if (fLocation != null) {
            return fLocation.getPublicId();
        }
        return null;
    }

    public String getLiteralSystemId() {
        if (fLocation != null) {
            return fLocation.getSystemId();
        }
        return null;
    }

    public String getBaseSystemId() {
        return null;
    }

    public String getExpandedSystemId() {
        return getLiteralSystemId();
    }

    public int getLineNumber() {
        if (fLocation != null) {
            return fLocation.getLineNumber();
        }
        return -1;
    }

    public int getColumnNumber() {
        if (fLocation != null) {
            return fLocation.getColumnNumber();
        }
        return -1;
    }

    public int getCharacterOffset() {
        if (fLocation != null) {
            return fLocation.getCharacterOffset();
        }
        return -1;
    }

    public String getEncoding() {
        return null;
    }

    public String getXMLVersion() {
        return null;
    }

} // StAXLocationWrapper