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/*******************************************************************************
 * ============LICENSE_START====================================================
 * * org.onap.aaf
 * * ===========================================================================
 * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * * ===========================================================================
 * * 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.
 * * ============LICENSE_END====================================================
 * *
 * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 * *
 ******************************************************************************/
package com.att.cadi.wsse;

import javax.xml.namespace.QName;
import javax.xml.stream.events.XMLEvent;

/**
 * XEvent
 * 
 * This mechanism mimics a minimal portion of StAX "XMLEvent", enough to work with minimal XReader.
 * 
 * We implement the same interface, as much as minimally necessary, as XMLEvent for these small usages so as to
 * be interchangeable in the future, if so desired
 * 
 *
 */
// @SuppressWarnings("restriction")
public abstract class XEvent {

	public abstract int getEventType();

	public StartElement asStartElement() {
		return (StartElement)this;
	}

	public Characters asCharacters() {
		return (Characters)this;
	}

	public EndElement asEndElement() {
		return (EndElement)this;
	}

    public static abstract class NamedXEvent extends XEvent {
    	private QName qname;

    	public NamedXEvent(QName qname) {
    		this.qname = qname;
    	}
    	
		public QName getName() {
    		return qname;
    	}
    }
	public static class StartElement extends NamedXEvent {

		public StartElement(String ns, String tag) {
			super(new QName(ns,tag));
		}

		@Override
		public int getEventType() {
			return XMLEvent.START_ELEMENT;
		}
	}

	public static class EndElement extends NamedXEvent {
		public EndElement(String ns, String tag) {
			super(new QName(ns,tag));
		}
		
		@Override
		public int getEventType() {
			return XMLEvent.END_ELEMENT;
		}
	}

	public static class Characters extends XEvent {
		private String data;

		public Characters(String data) {
			this.data = data;
		}
		@Override
		public int getEventType() {
			return XMLEvent.CHARACTERS;
		}

		public String getData() {
			return data;
		}
	}
	
	public static class StartDocument extends XEvent {

		@Override
		public int getEventType() {
			return XMLEvent.START_DOCUMENT;
		}
		
	}

	public static class EndDocument extends XEvent {

		@Override
		public int getEventType() {
			return XMLEvent.END_DOCUMENT;
		}
		
	}
	public static class Comment extends XEvent {
		public final String value;
		public Comment(String value) {
			this.value = value;
		}

		@Override
		public int getEventType() {
			return XMLEvent.COMMENT;
		}
	
	}

}