featurememberparser.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.datasources.ogc.wfs.parsing;

import java.util.ArrayList;
import java.util.List;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.XMLEvent;

import com.esri.solutions.jitk.datasources.ogc.gml.parsing.GMLGeometryParser;
import com.esri.solutions.jitk.datasources.ogc.wfs.FeatureField;
import com.esri.solutions.jitk.datasources.ogc.wfs.FeatureMember;
import com.esri.solutions.jitk.datasources.ogc.wfs.parsing.stax.IElementParser;
import com.esri.solutions.jitk.datasources.ogc.wfs.parsing.stax.ParsingException;

public class FeatureMemberParser  implements IElementParser {
	protected String _layer = null;
	protected List<FeatureMember> _fms = new ArrayList<FeatureMember>();
	protected GMLGeometryParser _gmlGeometryParser = new GMLGeometryParser();
	
	public FeatureMemberParser() {
	}
	
	public void setLayerName(String layer) {
		_layer = layer;
	}
	
	public void parse(XMLEventReader xmler, XMLEvent currentEvent) throws XMLStreamException, ParsingException {
		XMLEvent event;
		String currentElementName = "";
		FeatureMember fm = new FeatureMember();
		
		while (xmler.hasNext()) {
			event = xmler.nextEvent();
			
			if (event.isStartElement()) {
				currentElementName = event.asStartElement().getName().getLocalPart();
				// Parse GML shape
				if (currentElementName.equalsIgnoreCase("Shape")) {
					_gmlGeometryParser.parse(xmler, currentEvent);
					fm.setShapeField(_gmlGeometryParser.getGeometry());
				}
			}
			
			if (event.isCharacters()) {
				// Parse feature elements (column values)
				if (!currentElementName.equals(_layer)){
					String data = event.asCharacters().getData();
					addFieldValue(fm, currentElementName, data);
				}
			}
			
			if (event.isEndElement()) {
				String elementName = event.asEndElement().getName().getLocalPart();
				if (elementName.equals("featureMember")) {
					_fms.add(fm);
					break;
				}
			}
		}
	}
	
	public void addFieldValue(FeatureMember fm, String fieldName, String fieldValue) {
		FeatureField ff = new FeatureField();
		ff.setName(fieldName);
		ff.setValue(fieldValue);
		
		fm.addFeatureField(ff);
	}
	
	public List<FeatureMember> getFeatureMembers() {
		return _fms;
	}
}